CN104180928A - Sealed constant temperature bath - Google Patents
Sealed constant temperature bath Download PDFInfo
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- CN104180928A CN104180928A CN201410448249.9A CN201410448249A CN104180928A CN 104180928 A CN104180928 A CN 104180928A CN 201410448249 A CN201410448249 A CN 201410448249A CN 104180928 A CN104180928 A CN 104180928A
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- oil
- blind flange
- temperature
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- cell body
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Abstract
The invention discloses a sealed constant temperature bath which comprises a bath body, a flange cover and a sealing ring. The bath body is made of materials which are resistant to corrosion and pressure and cannot react with oil products. The flange cover and the bath body are sealed. The sealing ring is arranged between the bath body and the flange cover. At least one installation hole is formed in the flange cover. A temperature gauge insertion tube is connected with the flange cover through the installation hole. According to the sealed constant temperature bath, the normal-pressure sealing structure is achieved, the open-type structure of a traditional constant temperature oil bath is improved fundamentally, and oil and oil steam are automatically recycled in the heating process, so that a sealed self-circulation system is formed, no pollution is caused to the environment, and green verification and calibration are achieved.
Description
Technical field
The present invention relates to a kind of calibration cell, especially relate to a kind of for the enclosure-type calibration cell under normal pressure.
Background technology
Thermostatic oil bath is the necessary equipment of thermometer calibrating, 100～300 DEG C of temperature ranges.Be mainly used in glass liquid thermometer, the thermometer of resistive element, the calibrating such as thermopair, bimetallic system cell and calibration.All there is such device in metering mechanism above or large enterprise of counties and districts of China, and national recoverable amount has more than several dry platforms.
The working method of thermostatic oil bath is open, and by temperature controller, control heater, directly heats the high-temperature medium such as silicone oil, steam cylinder oil of oil groove, makes its intensification, constant temperature.Along with temperature raises 100～300 DEG C of scopes, can produce a large amount of oil vapours, fill the air and come, in whole laboratory, be full of oil gas, delay to clip the volatilization of hydrogen hydrocarbon, choke to such an extent that eye is shed tears, breathless.Conventionally the method solving is: thermostatic oil bath is placed in the airtight partition that Powerful exhaust fan is housed, and in experimentation, exhaust fan is worked always, and flue gas is directly discharged in outdoor air.Since invention oil groove, worked by this way always.
But, the flue gas that contains the objectionable constituent such as a large amount of hydrogen hydrocarbon is directly discharged in atmosphere, PM2.5 has been caused to impact, pollute environment, people's physical and mental health is worked the mischief.And high temperature oil, along with repeatedly repeatedly heating, causes the volatilization of the compositions such as hydrogen hydrocarbon, and character changes, and conventionally needs three, five months more renew oils, not only causes waste, the bad secondary pollution that is also easy to cause environment of waste oil treatment.
Summary of the invention
The object of this invention is to provide a kind of atmospheric pressure sealed formula calibration cell, avoid the outside discharge of the objectionable impurities in oil groove.
The invention provides a kind of enclosure-type calibration cell, comprising: cell body, it is by corrosion-resistant withstand voltage and can not make with the aitiogenic material of oil product; Blind flange, described blind flange and cell body seal; O-ring seal is provided with O-ring seal between cell body and blind flange; It is characterized in that: on described blind flange, have at least one mounting hole, thermometer intubate is connected with blind flange by mounting hole.
Wherein, between described thermometer intubate and blind flange, can bond or weld or other modes are connected by colloid.
Wherein, described O-ring seal is resistant to elevated temperatures O-ring seal.
Wherein, described enclosure-type calibration cell is further provided with control section, and described control section is connected with stirring motor, controls stirring motor for oil product is stirred.
Wherein, temperature sensor is deep in cell body by a mounting hole.
The present invention fundamentally solves the problem that the composition such as flue gas and hydrogen hydrocarbon of open oil groove in the process of heating directly discharges atmosphere.Form airtight self-circulation system, protection of the environment and people's physical and mental health.High-temperature medium oil can use for a long time, needn't change.
Brief description of the drawings
Fig. 1 is atmospheric pressure sealed formula calibration cell of the present invention.
Embodiment
For the ease of understanding the present invention, below in conjunction with accompanying drawing, embodiments of the invention are described, it will be appreciated by those skilled in the art that following explanation is just for the ease of invention is made an explanation, and not as the concrete restriction to its scope.
Be illustrated in figure 1 atmospheric pressure sealed formula calibration cell of the present invention, described calibration cell comprises cell body 1, described cell body 1 can be made up of stainless steel material, also corrosion-resistant withstand voltage and can not make with the aitiogenic material of oil product by other, described cell body 1 can be shape cylindrical or cube shaped or that other are suitable; Be provided with the blind flange 2 of cooperation on the top of cell body 1, between described blind flange 2 and described cell body 1, can be provided with O-ring seal 3, described O-ring seal 3 can be resistant to elevated temperatures high-temperature seal ring, wherein said blind flange 2 can adopt the material identical with cell body 1 to make, and can be also the material different from cell body 1; On blind flange 2, be provided with one or more mounting holes, temperature sensor 5 is deep in cell body 1 by one of them mounting hole, at least one thermometer intubate 6 is connected with blind flange 2 by mounting hole, wherein, between described thermometer intubate 6 and blind flange 2, can bond or weld or other modes are connected by colloid, in described thermometer intubate 6, can insert thermometer, in the time that cell body 1 and blind flange 2 are fixed together, oil body in cell body 1 can not overflow from the mounting hole of blind flange 2, and blind flange 2 has completely cut off cell body inside and extraneous being connected on the whole.
Sealing formula calibration cell is provided with control section 7, described control section 7 is connected with stirring motor 8, control stirring motor 8 for oil product is stirred, oil product is carried out in heating process, make the more uniform temperature of oil product in oil groove by the stirring of stirring motor 8, described control section 7 is connected with temperature sensor 5, by the oil product temperature in temperature sensor measurement oil groove, arrive and control temperature controller (not shown) according to the temperature feedback of temperature sensor, described temperature controller is controlled the temperature of oil product by control heater 4, the described device 4 that adds can be heater strip or heating film, described temperature controller makes the temperature of oil product keep constant temperature, wherein, in order to ensure temperature homogeneity, described control section 7 is according to the stirring rate of the stirrer 12 of the temperature feedback control stirring motor 8 of temperature sensor 5, in initial heat-up stage, stirring motor rotating speed is very fast, in the time that temperature is tending towards constant temperature, the speed of stirring motor keeps constant or stops stirring.
On cell body 1 or blind flange 2, be connected with oil guide pipe, one end of described oil guide pipe be connected at cell body 1 or blind flange 2, the other end of described oil guide pipe is connected with oil return fuel tank 9, oil product in cell body 1 overflows in oil return fuel tank 9 from oil guide pipe, described oil return fuel tank 9 has visual liquid level sign, described oil return fuel tank 9 is connected with return-air air bag 10, and described return-air air bag 10 is for reclaiming the oil product of gaseous state.
In described enclosure-type calibration cell, be also provided with electric box 11, in described electric box 11, be provided with well heater and other circuit components, for controlling and ensure the normal work of described calibration cell.
When atmospheric pressure sealed formula calibration cell on adopt carries out work, first, by described oil product, be preferably high-temperature medium oil, described high-temperature medium oil is poured in calibration cell, if oil guide pipe is arranged in cell body 1, the high-temperature medium oil adding is until overflow, from oil guide pipe, overflow in oil return fuel tank 9, then, high-temperature seal ring 3 is placed between cell body 1 and blind flange 2.If oil guide pipe is arranged on blind flange 2, need first high-temperature medium oil to be circulated in cell body 1 by a mounting hole, in the time that filling it up with, oil can overflow from oil guide pipe salable mounting hole.
In the process sealing at cell body 1 and blind flange 2, align with blind flange 2 and the cell body 1 of thermometer intubate 6, and use tight bolt tightening, make its sealing.The oil return fuel tank 9 that is tightly connected, return-air air bag 10, the Oil Guide pipeline of overflow.
After system assembles completes, check the impermeability of enclosure-type thermostatic bath system under normal pressure, the pressure in calibration cell is usually above atmospheric pressure 0.01Pa.
Start-up temperature controller, the oil temperature of controlling the high-temperature medium oil in calibration cell continues to rise, until reach design temperature, makes high-temperature medium oil keep constant temperature.In oil temperature during higher than 100 DEG C, oil volume expands and makes oil and steam carry out overflow by oil guide pipe, overflow to the bottom of oil return fuel tank 9 along oil guide pipe, mix with the cold oil in oil return fuel tank 9, the oil vapour on surface can flow to return-air air bag 10 under oil pressure, and described return-air air bag is by having flexible material and can not made by the material of oil corrosion.
Calculate the swell increment 300 DEG C time according to the thermal expansivity of high temperature oil, so that the volume of design oil return fuel tank 9, pointwise is persistently overheating, constant temperature, until the maximum temperature point of experiment completes.
After work completes, oil groove stop heating, cooling after, in the gas in return-air air bag 10 and oil return fuel tank 9 oil pressure under, oil in oil return fuel tank 9 can oppositely flow back in the cell body 1 of calibration cell along oil guide pipe, stops oil return until the pasta in oil scavenger reaches initial position.
Heating in experimentation, the oil after expansion and steam flow to oil return fuel tank bottom through oil guide pipe, and oil vapour is got back to return-air air bag 10.In the time that oil temperature drops near room temperature, oil can flow back in the cell body 1 of calibration cell by automatic reverse, so forms airtight self-circulation system, isolated with air, and high temperature oil is not oxidized, and increases the service life.
In the present invention, between oil groove cell body and blind flange, install sealing gasket additional, make to contain oily part cell body 1 isolated with air, form closed structure.The inside of oil return fuel tank and pipeline and extraneous air isolation, form tank oiling channel oil closed structure.Return-air air bag and extraneous air isolation, form oil vapour and pipeline sealing structure.All oil circuits, gas circuit be airtight connection all.In heat temperature raising process, oil expands and overflows to oil return fuel tank, and steam is to return-air air bag, and cooling rear oil flows back to oil groove voluntarily, forms airtight self-circulation system.
The present invention has realized calibration cell atmospheric pressure sealed structure, has fundamentally solved traditional thermostatic oil bath Open architecture, and in the process of heating, oil and oil vapour the automatic recovery, form airtight self-circulation system, free from environmental pollution, realizes green calibrating and calibration.This is more revolutionary innovation in temperature measurement field.
Owing to being closed self-cycle structure, oil, steam not ingress of air, be not oxidized, hydrogen hydrocarbon volatilize less than in air, oil mass loss is little, can use for a long time, need not change saving calibrating and measuring cost.
Be understandable that, although the present invention discloses as above with preferred embodiment, but above-described embodiment is not in order to limit the present invention.For any those of ordinary skill in the art, do not departing from technical solution of the present invention scope situation, all can utilize the technology contents of above-mentioned announcement to make many possible variations and modification to technical solution of the present invention, or be revised as the equivalent embodiment of equivalent variations.Therefore, every content that does not depart from technical solution of the present invention,, all still belongs in the scope of technical solution of the present invention protection any simple modification made for any of the above embodiments, equivalent variations and modification according to technical spirit of the present invention.
Claims (5)
1. an enclosure-type calibration cell, comprising: cell body, and it is by corrosion-resistant withstand voltage and can not make with the aitiogenic material of oil product; Blind flange, described blind flange and cell body seal; O-ring seal is provided with O-ring seal between cell body and blind flange; It is characterized in that: on described blind flange, have at least one mounting hole, thermometer intubate is connected with blind flange by mounting hole.
2. enclosure-type calibration cell as claimed in claim 1, is characterized in that, between described thermometer intubate and blind flange, can be bondd or be welded or other modes are connected by colloid.
3. enclosure-type calibration cell as claimed in claim 1, is characterized in that, described O-ring seal is resistant to elevated temperatures O-ring seal.
4. enclosure-type calibration cell as claimed in claim 1, is characterized in that, described enclosure-type calibration cell is further provided with control section, and described control section is connected with stirring motor, controls stirring motor for oil product is stirred.
5. enclosure-type calibration cell as claimed in claim 1, is characterized in that, temperature sensor is deep in cell body by a mounting hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410448249.9A CN104180928B (en) | 2014-09-04 | 2014-09-04 | A kind of sealed thermostat |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410448249.9A CN104180928B (en) | 2014-09-04 | 2014-09-04 | A kind of sealed thermostat |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104180928A true CN104180928A (en) | 2014-12-03 |
| CN104180928B CN104180928B (en) | 2017-07-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201410448249.9A Expired - Fee Related CN104180928B (en) | 2014-09-04 | 2014-09-04 | A kind of sealed thermostat |
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| CN (1) | CN104180928B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2720819C1 (en) * | 2019-12-30 | 2020-05-13 | Общество с ограниченной ответственностью «Обнинская термоэлектрическая компания» | Device for calibration of high-temperature thermocouples |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107607228B (en) * | 2017-08-16 | 2019-09-27 | 潍柴动力股份有限公司 | A kind of temperature sensor detector |
Citations (8)
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| CN85205068U (en) * | 1985-11-13 | 1986-08-20 | 中国科学院上海技术物理研究所 | Heating tube-type glass thermometer-calibrating/checking constant-temp.oven |
| FR2816708A1 (en) * | 2000-11-10 | 2002-05-17 | Gilles Jean | Thermostatic probe for testing internal temperature of products, comprises watertight case which contains temperature sensor shielded from ambient air by temperature stable liquid and spacer |
| CN201488839U (en) * | 2009-07-20 | 2010-05-26 | 泰安磐然测控科技有限公司 | Heat pipe thermostatic slot for calibrating short type temperature sensor |
| CN102564647A (en) * | 2012-01-06 | 2012-07-11 | 中国计量科学研究院 | Thermostatic bath for verifying temperature sensor paired with calorimeter |
| CN202677219U (en) * | 2012-06-14 | 2013-01-16 | 西安航天计量测试研究所 | Low-temperature continuous point temperature control thermostat |
| CN103115699A (en) * | 2013-02-06 | 2013-05-22 | 北京东方计量测试研究所 | Temperature equalizing system for calibration of temperature sensors in vacuum |
| CN103977850A (en) * | 2014-06-11 | 2014-08-13 | 国家海洋标准计量中心 | High-accuracy constant-temperature tank system with temperature change of seawater |
| CN204346612U (en) * | 2014-09-04 | 2015-05-20 | 北京三原兆兴科技有限公司 | A kind of enclosure-type calibration cell |
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2014
- 2014-09-04 CN CN201410448249.9A patent/CN104180928B/en not_active Expired - Fee Related
Patent Citations (8)
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| CN85205068U (en) * | 1985-11-13 | 1986-08-20 | 中国科学院上海技术物理研究所 | Heating tube-type glass thermometer-calibrating/checking constant-temp.oven |
| FR2816708A1 (en) * | 2000-11-10 | 2002-05-17 | Gilles Jean | Thermostatic probe for testing internal temperature of products, comprises watertight case which contains temperature sensor shielded from ambient air by temperature stable liquid and spacer |
| CN201488839U (en) * | 2009-07-20 | 2010-05-26 | 泰安磐然测控科技有限公司 | Heat pipe thermostatic slot for calibrating short type temperature sensor |
| CN102564647A (en) * | 2012-01-06 | 2012-07-11 | 中国计量科学研究院 | Thermostatic bath for verifying temperature sensor paired with calorimeter |
| CN202677219U (en) * | 2012-06-14 | 2013-01-16 | 西安航天计量测试研究所 | Low-temperature continuous point temperature control thermostat |
| CN103115699A (en) * | 2013-02-06 | 2013-05-22 | 北京东方计量测试研究所 | Temperature equalizing system for calibration of temperature sensors in vacuum |
| CN103977850A (en) * | 2014-06-11 | 2014-08-13 | 国家海洋标准计量中心 | High-accuracy constant-temperature tank system with temperature change of seawater |
| CN204346612U (en) * | 2014-09-04 | 2015-05-20 | 北京三原兆兴科技有限公司 | A kind of enclosure-type calibration cell |
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| 邱萍等: "热量表配对温度传感器检定恒温槽的研制", 《计量学报》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2720819C1 (en) * | 2019-12-30 | 2020-05-13 | Общество с ограниченной ответственностью «Обнинская термоэлектрическая компания» | Device for calibration of high-temperature thermocouples |
| WO2021137731A1 (en) * | 2019-12-30 | 2021-07-08 | Общество с ограниченной ответственностью "Обнинская термоэлектрическая компания" | Device for calibrating high-temperature thermocouples |
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| Publication number | Publication date |
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| CN104180928B (en) | 2017-07-11 |
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