CN110657897A - Silicon nitride thermocouple protection tube - Google Patents
Silicon nitride thermocouple protection tube Download PDFInfo
- Publication number
- CN110657897A CN110657897A CN201911130138.2A CN201911130138A CN110657897A CN 110657897 A CN110657897 A CN 110657897A CN 201911130138 A CN201911130138 A CN 201911130138A CN 110657897 A CN110657897 A CN 110657897A
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- Prior art keywords
- protection tube
- plate
- thermocouple
- silicon nitride
- resistant
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
- G01K7/02—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using thermoelectric elements, e.g. thermocouples
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/08—Protective devices, e.g. casings
- G01K1/10—Protective devices, e.g. casings for preventing chemical attack
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/08—Protective devices, e.g. casings
- G01K1/12—Protective devices, e.g. casings for preventing damage due to heat overloading
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Temperature Or Quantity Of Heat (AREA)
Abstract
The invention discloses a silicon nitride thermocouple protection tube which comprises a thermocouple, a protection tube and an installation mechanism, wherein the protection tube is sleeved on the surface of the thermocouple, the installation mechanism is arranged on the protection tube, the installation mechanism comprises a fixing plate and a stabilizing plate, the inner wall of the fixing plate is fixedly connected with the surface of the thermocouple, and the inner wall of the stabilizing plate is fixedly connected with the surface of the protection tube. According to the invention, through the mutual matching of the high-temperature-resistant protection layer, the wear-resistant protection layer, the corrosion-resistant protection layer and the heat preservation layer, the high-temperature resistance, the wear resistance, the corrosion resistance and the heat preservation of the protection tube are greatly improved, so that the service life of the protection tube is greatly prolonged, the protection tube is prevented from being damaged under the condition of severe environment, and through the mutual matching of the fixing plate, the stabilizing plate, the positioning plate, the supporting plate, the limiting plate, the connecting block and the buffer spring, the convenience in installation of the protection tube is improved, the installation is simple and convenient, the fixing effect is prevented from being influenced, and great convenience.
Description
Technical Field
The invention relates to the technical field of thermocouples, in particular to a silicon nitride thermocouple protection tube.
Background
The thermocouple is a common temperature measuring element in a temperature measuring instrument, directly measures temperature, converts a temperature signal into a thermal electromotive force signal, converts the thermal electromotive force signal into the temperature of a measured medium through an electric instrument (a secondary instrument), the shapes of various thermocouples are usually different greatly according to requirements, but the basic structures of the various thermocouples are almost the same, the thermocouples are usually composed of main parts such as a thermode, an insulating sleeve protection tube, a junction box and the like, the thermocouples are usually matched with a display instrument, a recording instrument and an electronic regulator for use, the traditional thermocouple working environment is very bad, a protection tube sleeve is easy to generate chemical reaction, the common thermocouple protection tube has poor high temperature resistance and corrosion resistance, once the protection tube is damaged, harmful gas can leak from the protection tube sleeve and the temperature measuring element, the environment is polluted, great harm is brought to a human body, and the thermocouple protection tube is fixed by a flange piece and a fixed base station through screws, the long-time use of screw not only can appear embroidering the phenomenon, but also influences fixed effect, brings very big inconvenience for the user.
Disclosure of Invention
The present invention is directed to a silicon nitride thermocouple protection tube to solve the above problems in the background art.
In order to achieve the purpose, the invention provides the following technical scheme: a silicon nitride thermocouple protection tube comprises a thermocouple, a protection tube and a mounting mechanism, wherein the protection tube is sleeved on the surface of the thermocouple, and the mounting mechanism is arranged on the protection tube;
the mounting mechanism comprises a fixed plate and a stabilizing plate, the inner wall of the fixed plate is fixedly connected with the surface of a thermocouple, the inner wall of the stabilizing plate is fixedly connected with the surface of a protective tube, positioning plates are mounted on the left side and the right side of the top of the stabilizing plate, the top of each positioning plate penetrates through the fixed plate and extends to the outside of the fixed plate, a supporting plate is mounted on the top of the fixed plate and on the side away from the thermocouple, a limiting plate is arranged on the side, away from the positioning plates, of the supporting plate, a limiting plate is sequentially arranged on the side, close to the positioning plates, of the limiting plate, penetrates through the supporting plate and the positioning plates and extends to the outside of the positioning plates, a connecting block is mounted on the side, away;
the protective tube comprises a high-temperature-resistant protective layer, a wear-resistant protective layer is arranged on the inner wall of the high-temperature-resistant protective layer, a corrosion-resistant protective layer is arranged on the inner wall of the wear-resistant protective layer, and a heat preservation layer is arranged on the inner wall of the corrosion-resistant protective layer.
Preferably, the top of the stabilizing plate and the bottom of the fixing plate are in contact with each other.
Preferably, the high temperature resistant protective layer is made of magnesium oxide.
Preferably, the wear-resistant protective layer is made of silicon nitride.
Preferably, the corrosion-resistant protective layer is made of boron nitride powder.
Preferably, the heat insulation layer is made of an aluminum silicate fiber blanket.
Compared with the prior art, the invention has the following beneficial effects:
according to the invention, through the mutual matching of the high-temperature-resistant protective layer, the wear-resistant protective layer, the corrosion-resistant protective layer and the heat preservation layer, the high-temperature resistance, the wear resistance, the corrosion resistance and the heat preservation of the protective tube are greatly improved, so that the service life of the protective tube is greatly prolonged, the protective tube is prevented from being damaged under the condition of severe environment, and through the mutual matching of the fixing plate, the stabilizing plate, the positioning plate, the supporting plate, the limiting plate, the connecting block and the buffer spring, the convenience in installation of the protective tube is greatly improved, the installation is simple and convenient, the fixing effect is prevented from being influenced, and great convenience.
Drawings
FIG. 1 is a structural cross-sectional view in elevation of the present invention;
FIG. 2 is an enlarged view of a portion of A-A of FIG. 1 in accordance with the present invention;
FIG. 3 is an enlarged view of a portion B-B of FIG. 1 according to the present invention.
In the figure: 1 thermocouple, 2 protective tubes, 21 high temperature resistant protective layers, 22 wear resistant protective layers, 23 corrosion resistant protective layers, 24 heat preservation layers, 3 mounting mechanisms, 31 fixing plates, 32 stabilizing plates, 33 positioning plates, 34 supporting plates, 35 limiting plates, 36 connecting blocks and 37 buffer springs.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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 protection scope of the present invention.
Referring to fig. 1-3, a silicon nitride thermocouple protection tube includes a thermocouple 1, a protection tube 2, and a mounting mechanism 3, wherein the protection tube 2 is sleeved on the surface of the thermocouple 1, and the mounting mechanism 3 is disposed on the protection tube 2.
Installation mechanism 3 includes fixed plate 31 and firm board 32, the inner wall of fixed plate 31 and the fixed surface of thermocouple 1 are connected, the inner wall of firm board 32 and the fixed surface of protection tube 2 are connected, the top of firm board 32 and the bottom of fixed plate 31 contact each other, the equal fixedly connected with locating plate 33 in the left and right sides at firm board 32 top, the top of locating plate 33 runs through fixed plate 31 and extends to its outside, the top of fixed plate 31 and the one side fixedly connected with backup pad 34 of keeping away from thermocouple 1, one side that locating plate 33 was kept away from to backup pad 34 is provided with limiting plate 35, one side that limiting plate 35 is close to locating plate 33 runs through backup pad 34 and locating plate 33 in proper order and extends to the outside of locating plate 33, one side fixedly connected with connecting block 36 that thermocouple 1 was kept away from to limiting plate 35, buffer spring 37 has been cup jointed on the surface of limiting plate 35.
The protection tube 2 comprises a high-temperature resistant protection layer 21, the high-temperature resistant protection layer 21 is made of magnesium oxide, the magnesium oxide has high fireproof insulating property, the high-temperature resistant property of the protection tube 2 is improved by arranging the high-temperature resistant protection layer 21, the inner wall of the high-temperature resistant protection layer 21 is provided with a wear-resistant protection layer 22, the wear-resistant protection layer 22 is made of silicon nitride, the strength of the silicon nitride is very high, especially hot-pressed silicon nitride, the silicon nitride is one of the hardest substances in the world, the silicon nitride is extremely high-temperature resistant, the strength can be maintained to the high temperature of 1200 ℃ without reduction, the silicon nitride can not be melted into a molten body after being heated, the silicon nitride can not be decomposed until 1900 ℃ and can resist almost all inorganic acids and caustic soda solution with the concentration of below 30 percent and resist corrosion of a plurality of organic acids, and is a high-performance electric insulating material, the wear resistance of the protection, the inner wall of the wear-resistant protection layer 22 is provided with the corrosion-resistant protection layer 23, the corrosion-resistant protection layer 23 is made of boron nitride powder, the boron nitride powder has good electrical insulation, thermal conductivity and chemical corrosion resistance, the corrosion resistance of the protection tube 2 is improved by arranging the corrosion-resistant protection layer 23, the protection tube 2 is prevented from being corroded, the inner wall of the corrosion-resistant protection layer 23 is provided with the heat preservation layer 24, the heat preservation layer 24 is made of an aluminum silicate fiber blanket, the aluminum silicate fiber blanket has low thermal conductivity, low thermal capacity, good chemical stability, good thermal stability, shock resistance, good tensile strength and good sound absorption, excellent materials are added into the heat preservation refractory materials, the protection tube 2 cannot crack due to extreme cold extreme heat and thermal shock of a measuring working condition by arranging the heat preservation layer 24, and the high-temperature resistant protection layer 21, the wear-resistant protection layer 22, the corrosion-resistant protection layer, the high temperature resistance of protection tube 2 has been improved greatly, the wearability, corrosion resistance and heat insulating ability, thereby the life of protection tube 2 has been improved greatly, avoid protection tube 2 to take place to damage under the abominable condition of environment, through setting up fixed plate 31, firm board 32, locating plate 33, backup pad 34, limiting plate 35, connecting block 36 and buffer spring 37 mutually support, convenience when having improved protection tube 2 installation greatly, simple and convenient during the installation, avoid influencing fixed effect, bring very big facility for the user.
During the use, insert thermocouple 1 into protection tube 2 to make locating plate 33 run through fixed plate 31, then run through locating plate 33 through limiting plate 35, thereby played the effect of fixed protection tube 2.
In summary, the following steps: this silicon nitride thermocouple protection tube, through the mutually supporting of high temperature resistant protective layer 21, wear-resisting protective layer 22, corrosion-resistant protective layer 23 and heat preservation 24, through setting up mutually supporting of fixed plate 31, firm board 32, locating plate 33, backup pad 34, limiting plate 35, connecting block 36 and buffer spring 37, has solved the problem that proposes among the above-mentioned background art.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The utility model provides a silicon nitride thermocouple protection tube, includes thermocouple (1), protection tube (2) and installation mechanism (3), its characterized in that: the protection tube (2) is sleeved on the surface of the thermocouple (1), and the mounting mechanism (3) is arranged on the protection tube (2);
the installation mechanism (3) comprises a fixing plate (31) and a stabilizing plate (32), the inner wall of the fixing plate (31) is fixedly connected with the surface of the thermocouple (1), the inner wall of the stabilizing plate (32) is fixedly connected with the surface of the protection tube (2), the positioning plates (33) are installed on the left side and the right side of the top of the stabilizing plate (32), the top of the positioning plates (33) penetrates through the fixing plate (31) and extends to the outside of the fixing plate, a supporting plate (34) is installed on one side of the top of the fixing plate (31) and far away from the thermocouple (1), one side of the supporting plate (34) far away from the positioning plate (33) is provided with a limiting plate (35), one side of the limiting plate (35) close to the positioning plate (33) penetrates through the supporting plate (34) and the positioning plate (33) in sequence and extends to the outside of the positioning plate (33), one side of the limiting, the surface of the limiting plate (35) is sleeved with a buffer spring (37), and one side, close to the buffer spring (37), of the connecting block (36) is fixedly connected with the supporting plate (34) through the buffer spring (37);
the protection tube (2) comprises a high-temperature-resistant protection layer (21), a wear-resistant protection layer (22) is arranged on the inner wall of the high-temperature-resistant protection layer (21), a corrosion-resistant protection layer (23) is arranged on the inner wall of the wear-resistant protection layer (22), and a heat preservation layer (24) is arranged on the inner wall of the corrosion-resistant protection layer (23).
2. The protection tube for a silicon nitride thermocouple of claim 1, wherein: the top of the stabilizing plate (32) and the bottom of the fixing plate (31) are in contact with each other.
3. The protection tube for a silicon nitride thermocouple of claim 1, wherein: the high-temperature-resistant protective layer (21) is made of magnesium oxide.
4. The protection tube for a silicon nitride thermocouple of claim 1, wherein: the wear-resistant protective layer (22) is made of silicon nitride.
5. The protection tube for a silicon nitride thermocouple of claim 1, wherein: the corrosion-resistant protective layer (23) is made of boron nitride powder.
6. The protection tube for a silicon nitride thermocouple of claim 1, wherein: the heat-insulating layer (24) is made of an aluminum silicate fiber blanket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911130138.2A CN110657897A (en) | 2019-11-18 | 2019-11-18 | Silicon nitride thermocouple protection tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911130138.2A CN110657897A (en) | 2019-11-18 | 2019-11-18 | Silicon nitride thermocouple protection tube |
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| Publication Number | Publication Date |
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| CN110657897A true CN110657897A (en) | 2020-01-07 |
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| CN201911130138.2A Pending CN110657897A (en) | 2019-11-18 | 2019-11-18 | Silicon nitride thermocouple protection tube |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1489263A1 (en) * | 1964-11-19 | 1969-08-28 | Corhart Refractories Co | Immersible thermocouple |
| JP2001183240A (en) * | 1999-12-22 | 2001-07-06 | Isuzu Ceramics Res Inst Co Ltd | Thermocouple |
| CN202836817U (en) * | 2012-10-30 | 2013-03-27 | 山东省黄金电力公司 | Wireless temperature measurement device for switch moving contact |
| CN106197717A (en) * | 2016-07-21 | 2016-12-07 | 安徽蓝润自动化仪表有限公司 | A kind of durable type thermocouple |
| CN206132251U (en) * | 2016-09-30 | 2017-04-26 | 上海埃鲁秘工业炉制造有限公司 | Silicon nitride thermocouple protection tube |
| CN207275399U (en) * | 2017-09-11 | 2018-04-27 | 上海生生物流有限公司 | A kind of wireless thermometers for vacuum incubator |
| CN208688690U (en) * | 2018-10-11 | 2019-04-02 | 合肥智测电子有限公司 | A kind of thermal field structure of double-circuit temperature control electric thermo-couple test furnace |
-
2019
- 2019-11-18 CN CN201911130138.2A patent/CN110657897A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1489263A1 (en) * | 1964-11-19 | 1969-08-28 | Corhart Refractories Co | Immersible thermocouple |
| JP2001183240A (en) * | 1999-12-22 | 2001-07-06 | Isuzu Ceramics Res Inst Co Ltd | Thermocouple |
| CN202836817U (en) * | 2012-10-30 | 2013-03-27 | 山东省黄金电力公司 | Wireless temperature measurement device for switch moving contact |
| CN106197717A (en) * | 2016-07-21 | 2016-12-07 | 安徽蓝润自动化仪表有限公司 | A kind of durable type thermocouple |
| CN206132251U (en) * | 2016-09-30 | 2017-04-26 | 上海埃鲁秘工业炉制造有限公司 | Silicon nitride thermocouple protection tube |
| CN207275399U (en) * | 2017-09-11 | 2018-04-27 | 上海生生物流有限公司 | A kind of wireless thermometers for vacuum incubator |
| CN208688690U (en) * | 2018-10-11 | 2019-04-02 | 合肥智测电子有限公司 | A kind of thermal field structure of double-circuit temperature control electric thermo-couple test furnace |
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Application publication date: 20200107 |
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