CN2042193U - Noninserting platinum thermometer - Google Patents
Noninserting platinum thermometer Download PDFInfo
- Publication number
- CN2042193U CN2042193U CN 88207295 CN88207295U CN2042193U CN 2042193 U CN2042193 U CN 2042193U CN 88207295 CN88207295 CN 88207295 CN 88207295 U CN88207295 U CN 88207295U CN 2042193 U CN2042193 U CN 2042193U
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- temperature
- insulation
- platinum
- noninserting
- thermometer
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Abstract
The utility model discloses a noninserting platinum thermometer belonging to a temperature measurement instrument. The noninserting platinum thermometer is composed of a displaying section, a temperature sensing section and an insulation blanket. The temperature sensing section is welded or adhered on the outer wall of a pipeline planed a corresponding junction surface. The noninserting platinum thermometer is mainly used for measuring the medium temperature in an insulation pipeline or an insulation container according to the engineering standard, the measuring error of the medium in the insulation pipeline is (+/-) 1.5 DEG C in the measuring temperature range of 0 to 500 DEG C, and the measuring error of the medium in the insulation container is (+/-) 2.5 DEG C. The noninserting platinum thermometer can measure the internal medium temperature in the outer wall of the insulation pipeline or the insulation container in the condition that the accuracy satisfies the technological requirement. The noninserting platinum thermometer can avoid the disadvantages of the existing platinum resistance thermometer which is installed in an open-pore plugging mode in production and use. The safe noninserting platinum thermometer has the advantages of small size, long service life and convenient assembly and disassembly.
Description
The utility model relates to a kind of measurement by the pipeline of engineering specification insulation or the temperature instrumentation of container inner medium temperature, and temperature-measuring range is 0-500 ℃.
The platinum-resistance thermometer of existing measuring channel or container inner medium temperature, its temperature sensing part all adopt the perforate plug-in type to install.The thermometer such in installation on the production system must carry out when stopping production or install before equipment operation, in case damage in the production run, then only when stopping production, change, for high temperature, high pressure, high potential of hydrogen production system, the temperature-sensitive part of this type of thermometer is easily ground away and is caused material spray leakage accident, and influence is produced.
The purpose of this utility model provide a kind of temperature sensing part not with utilidor or container in measured medium directly contact, it is outer and temperature instrumentation that measure its interior media temperature is called the non-insertion platinum-resistance thermometer to be attached to pipeline or wall of a container, this thermometer can replace existing perforate plug-in type platinum-resistance thermometer, and guarantees that precision is in the scope of production permit.
According to the 6th designing institute of Ministry of Chemical Industry be translated from West Germany " heat transfer handbook (Chemical Industry Press), as can be known on the engineering according to the pipeline or the container of standard temperature, the tube wall that heat conduction caused or the wall temperature difference can be ignored.So, as long as plane is welded or be bonded in to an enough little platinum resistance temperature sensing part that we make to be had outside the pipe of re-spective engagement face, the wall, apply the standard insulation, just can obtain the measured value of approximate its interior media temperature, carry out disposable temperature compensation according to its error amount again, just can obtain the thermometric value that precision satisfies production requirement.Based on this judgement, the utility model is made.Instrument is made up of three parts: display part, temperature-sensitive part and insulation blanket.
The display part does not have specific (special) requirements, can the general secondary Displaying Meter of adapted.
Temperature-sensitive partly is the contact portion with pipe that includes testing medium or wall, constitute by platinum inductance temperature element (3) and temperature-sensitive base critical pieces such as (2), the platinum resistance temperature-sensing element is contained in the mesopore of sitting at the bottom of the temperature-sensitive, middle centerline hole and base lower surface (being surface of contact) oblique, temperature-sensing element is to the distance of surface of contact as far as possible little (minor increment is not more than 1 millimeter), and surface of contact can be processed into plane or cambered surface so that installation and pipe, wall coincide.
For effective insulation, do not make its radiating and cooling, around mounted temperature sensing part, use blanket shape insulation material (as litaflex together with the pipe of being peeled off heat-insulation layer (peel about 300 millimeters long of heat-insulation layer off for pipeline, peel about 300 millimeters * 300 millimeters of heat-insulation layer off), wall for container; Its coefficient of heat conductivity such as aluminosilicate refractory fiber is not more than 0.1 kilocalorie/Mi Shidu) encirclement in the time of 500 ℃.This insulating sections is called insulation blanket (insulation thickness is no less than 80 millimeters for pipeline, is no less than 100 millimeters for container).
Although temperature sensing part is done as far as possible for a short time (being not more than φ 12 * 80), add insulation blanket, but the experiment of a large amount of thermometrics in 0-500 ℃ of scope shows: newly still there is certain measured deviation in this practicality: for measuring in the utilidor medium temperature 0.5-3 on the low side ℃, for 1-5 on the low side ℃ of measurement insulation degree container inner medium temperature.This error belongs to the cumulative bad systematic error.The way of eliminating or dwindling this error is to raise the electrical null position of display part, makes its indication on half position of the corresponding limits of error.Adjust the secondary Displaying Meter of knob for no zero-bit, the method for raising electrical null position is that " D-6 " adjustable resistance terminal of serial connection (being called compensating resistance) is adjusted " D-6 " terminal Displaying Meter is indicated on half the position of the corresponding limits of error in the brachium pontis at temperature-sensing element place.Through disposable like this temperature compensation, the new temperature measurement error of this practicality can reach: being ± 1.5 ℃ for the pipeline internal medium thermometric, is ± 2.5 ℃ for the container inner medium thermometric.It is the measuring error that 0.5 grade temperature instrumentation causes in this measurement range that its margin of error is equivalent to precision.And the temperature instrumentation accuracy class of the online use in industrial scene the highest also be 0.5 grade, so the thermometric deviation after the utility model compensation satisfies industrial requirement fully.
Advantages such as this use is novel to be satisfied at temperature measurement accuracy under the prerequisite of industrial requirements, has realized outside in the arm measure utilidor or the medium temperature in the container, and it is little, simple in structure to have a volume, and easy accessibility is safe and reliable, and the life-span is long.
Description of drawings: figure one is embodiment temperature-sensitive part-structure figure.
Embodiment is a non-insertion platinum-resistance thermometer that is used for measuring the temperature of utilidor interior media below 500 ℃.Its temperature-sensitive part-structure is as follows: platinum resistance temperature-sensing element (3) is contained in the mesopore of temperature-sensitive base (2), middle centerline hole and base lower surface oblique, temperature-sensing element is as far as possible little apart from the distance of the base lower surface surface of contact of pipeline (promptly with), makes its minor increment be no more than 1 millimeter.The temperature-sensitive base welds or be bonded in to dig to be had on the pipeline of re-spective engagement face.The tip portion of temperature-sensitive base (2) has cross recess, be deep to the screw thread place, by cooperating with binding thread joint (6), have on the cable (7) to put glass fiber hose (4) other end after the wire bonds of one section glass fiber hose (5) cable tail (12) one ends and temperature-sensing element (3) and be connected with the display part by three-wire system with cable (7) chucking.Binding thread joint (6), (10) wire connection at metal hose road (8) and two ends, binding thread joint (10) cooperate with metal hose (8) and fastener head (11) the terminal chucking of cable (7).Insulating sections (1) adopts litaflex or alumina-silicate refractory fibre blanket, wraps thickly to be no less than 80 millimeters.
The display part is because of adopting general secondary Displaying Meter, so do not draw.
Compensating resistance adopts " D-6 " adjustable resistance terminal, is fixed on side by side on the sub-frame of back-end disk with line resistance, and compensating resistance is serially connected in the brachium pontis at temperature-sensing element place, does not draw.
Claims (3)
1, a kind of non-insertion platinum-resistance thermometer belongs to temperature measuring instrument, be used for measuring by the pipeline of engineering specification insulation or the medium temperature of container, has the display part, temperature-sensitive part and insulation blanket, the temperature-sensitive part mainly is made of platinum resistance temperature-sensing element and temperature-sensitive base, be characterized in the temperature sensing part welding or be bonded in to dig that the pipeline of re-spective engagement face or the outer wall of container are arranged, place in the temperature-sensitive base of temperature-sensing element centerline hole and end surface (the being surface of contact) oblique of sitting down, the platinum resistance temperature-sensing element is as far as possible little to the distance of tube wall or wall, and its minor increment is no more than 1 millimeter.The insulation blanket that temperature sensing part has blanket shape insulation material to make outward.
2, after thermometer as claimed in claim 1 is characterized in that determining the limits of error, the display part electrical null position is adjusted on the position of 1/2nd maximum errors, as temperature compensation (for the display part of no zero-bit adjustment knob, raising electrical null position is to utilize the compensating resistance that is serially connected in the brachium pontis of temperature-sensing element place to carry out).
3, as claim 1 or 2 described thermometers, it is characterized in that cable by the tip have sit at the bottom of the cross recessed temperature-sensitive 2 and binding thread joint 6 cooperate chucking.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88207295 CN2042193U (en) | 1988-06-15 | 1988-06-15 | Noninserting platinum thermometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88207295 CN2042193U (en) | 1988-06-15 | 1988-06-15 | Noninserting platinum thermometer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2042193U true CN2042193U (en) | 1989-08-02 |
Family
ID=4841335
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 88207295 Withdrawn CN2042193U (en) | 1988-06-15 | 1988-06-15 | Noninserting platinum thermometer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2042193U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105203157A (en) * | 2015-09-29 | 2015-12-30 | 重庆市伟岸测器制造股份有限公司 | Non-plug-in type multi-parameter pipe network on-line monitor |
| CN107606484A (en) * | 2017-10-09 | 2018-01-19 | 荆门宏图特种飞行器制造有限公司 | Deep cooling pressure vessel and its temperature-detecting device |
| CN109974871A (en) * | 2013-05-10 | 2019-07-05 | 伊利诺斯工具制品有限公司 | Temperature sensor band |
-
1988
- 1988-06-15 CN CN 88207295 patent/CN2042193U/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109974871A (en) * | 2013-05-10 | 2019-07-05 | 伊利诺斯工具制品有限公司 | Temperature sensor band |
| CN105203157A (en) * | 2015-09-29 | 2015-12-30 | 重庆市伟岸测器制造股份有限公司 | Non-plug-in type multi-parameter pipe network on-line monitor |
| CN105203157B (en) * | 2015-09-29 | 2017-11-21 | 重庆市伟岸测器制造股份有限公司 | A kind of non-insertion multi-parameter pipe network on-line computing model |
| CN107606484A (en) * | 2017-10-09 | 2018-01-19 | 荆门宏图特种飞行器制造有限公司 | Deep cooling pressure vessel and its temperature-detecting device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |