CN103940524A - Thermocouple protecting sleeve pipe and manufacturing method thereof - Google Patents
Thermocouple protecting sleeve pipe and manufacturing method thereof Download PDFInfo
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- CN103940524A CN103940524A CN201410167452.9A CN201410167452A CN103940524A CN 103940524 A CN103940524 A CN 103940524A CN 201410167452 A CN201410167452 A CN 201410167452A CN 103940524 A CN103940524 A CN 103940524A
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- outer tube
- titanium dioxide
- corundum
- corundum outer
- connecting pipe
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Abstract
A thermocouple protecting sleeve pipe comprises a corundum outer sleeve pipe, a titanium dioxide combination layer, a white steel inner sleeve pipe, a connecting flange, an asbestos rope, a connecting pipe and a wire head. A method comprises the steps that (1) titanium dioxide and a sodium silicate aqueous solution are mixed and evenly stirred, and titanium dioxide paste is obtained; (2) the prepared titanium dioxide paste is poured into the corundum outer sleeve pipe until the corundum outer sleeve pipe is full; (3) the asbestos rope is soaked in the titanium dioxide paste and then is wound on the back portion of the corundum outer sleeve pipe, and the connecting pipe is inserted in; (4) the white steel inner sleeve pipe is inserted into the corundum outer sleeve pipe filled with the titanium dioxide paste, and exceeded titanium dioxide paste is cleared; and (5) placing under room temperature is carried out for 18 h-24 h, then the connecting flange is welded to the front end of the connecting pipe, the wire head is welded to an opening end of the white steel inner sleeve pipe, and the thermocouple protecting sleeve pipe is manufactured. The thermocouple protecting sleeve pipe has the advantages of being suitable for normal operation under the titanium dioxide production working conditions of high temperature, high pressure, corrosion and abrasion, and the service life of the thermocouple protecting sleeve pipe can be prolonged.
Description
Technical field
The present invention relates to a kind of thermocouple protective casing and preparation method thereof.
Background technology
Thermopair is a kind of detector unit conventional in commercial production, and the precision of thermopair, durable degree direct influence the normal operation of process unit, and what guarantee the normal work of thermopair is exactly its protective casing.Existing thermocouple protective casing kind is a lot, is adapted to different operating modes.Chemical industry is general corundum sleeve pipe or the antifriction alloy sleeve pipe of adopting under rugged surroundings; obtain good effect; but in titanium dioxide explained hereafter; under high temperature, high pressure, burn into wear working condition, the protective casing of thermopair is had relatively high expectations; selecting corundum protective casing is a relatively comparatively ideal scheme; but due to corundum fragility more greatly, not impact-resistant physical property; often rupture in actual applications; life cycle is short; generally only have about 10 days; increase maintenance cost, had a strong impact on normal process operation.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of thermocouple protective casing and preparation method thereof; this thermocouple protective casing is applicable to normally operation under the titanium white production operating mode of high temperature, high pressure, burn into wearing and tearing, the long service life that can extend thermocouple protective casing.
Technical solution of the present invention is:
A kind of thermocouple protective casing, comprise white steel inner sleeve and the corundum outer tube of one end sealing, its special character is: described corundum outer tube is enclosed within on white steel inner sleeve, between white steel inner sleeve and corundum outer tube, fill titanium dioxide binding layer, the linkage section at described corundum outer tube rear portion is wound with asbestos rope and is bonded with connecting pipe, the front end of described connecting pipe is connected with joint flange, the openend of described white steel inner sleeve is connected with a head, the wall thickness of described white steel inner sleeve is 2mm～2.5mm, the wall thickness of described corundum outer tube is 2.5mm～3mm, the thickness of described titanium dioxide binding layer is 2mm～3mm.
The material of described connecting pipe is white steel.
The linkage section of described corundum outer tube is identical with connecting pipe length.
The linkage section of described corundum outer tube and connecting pipe length are 100mm～150mm.
A method for making for thermocouple protective casing, its concrete making step is as follows:
(1), be 2:1g/mL mixing and stirring by the aqueous solution of titanium dioxide and sodium silicate according to mass volume ratio, obtain titanium dioxide sticky;
(2), get each one of corundum outer tube isometric with thermocouple core and that one end is sealed and Bai Gang inner sleeve, corundum outer tube after plug-in mounting and the gap of Bai Gang inner sleeve are 2mm～3mm, pour in corundum outer tube and fill sticky the titanium dioxide of preparation, guarantee corundum overcoat inner air tube is discharged completely;
(3), by asbestos rope after the sticky middle dipping of titanium dioxide, be wound around the sticky asbestos rope of dipping titanium dioxide at the linkage section at corundum outer tube rear portion, insert connecting pipe, make connecting pipe be connected to the linkage section at corundum outer tube rear portion;
(4), white steel inner sleeve is inserted and filled in the sticky corundum outer tube of titanium dioxide, ensure that white steel inner sleeve is concentric with corundum outer tube, by clean sticky the titanium dioxide overflowing processing;
(5), place after 18h～24h under room temperature, joint flange is welded on to the front end of connecting pipe, silk head is welded on to the openend of white steel inner sleeve, make thermocouple protective casing.
Described sodium silicate is Na
2onSiO
2, the concentration of aqueous solution of sodium silicate is 210g/L～230 g/L.
Step (3) is inserted corundum outer tube after connecting pipe, by be wrapped in corundum outer tube rear portion linkage section asbestos rope to inboard tamping, and in the process of tamping, constantly add dipping by the mouth of pipe of connecting pipe to the space between corundum outer tube and connecting pipe and have the sticky asbestos rope of titanium dioxide.
Beneficial effect of the present invention:
(1), this thermocouple protective casing is taking white steel inner sleeve as pedestal, ensure thermocouple protective casing working strength, be socketed corundum outer tube outward at white steel inner sleeve, make thermocouple protective casing there is the high temperature resistant of excellence, corrosion-resistant, anti abrasive characteristic, titanium dioxide binding layer is filled in space between corundum outer tube and Bai Gang inner sleeve, titanium dioxide binding layer Mohs value can reach 6～7, and due in manufacturing process by the air emptying of corundum inside pipe casing, further improve the heat-resisting quantity of thermocouple protective casing, when use, be not easy fracture, improve thermopair serviceable life, reduce maintenance cost,
(2), the thermal conductivity of titanium dioxide binding layer is 1.809 W/ (mK)～10.3W/ (mK), increased the capacity of heat transmission, improved the temperature conduction effect of thermocouple protective casing, makes temperature thermocouple fast response time.
Brief description of the drawings
Fig. 1 is structural representation of the present invention.
1-corundum outer tube, 101-linkage section, 2-titanium dioxide binding layer, the white steel inner sleeve of 3-, 4-joint flange, 5-asbestos rope, 6-connecting pipe, 7-silk head.
Embodiment
embodiment 1
As shown in Figure 1, this thermocouple protective casing, comprise white steel inner sleeve 3 and the corundum outer tube 1 of one end sealing, described corundum outer tube 1 is enclosed within on white steel inner sleeve 3, between white steel inner sleeve 3 and corundum outer tube 1, fill titanium dioxide binding layer 2, the linkage section 101 at described corundum outer tube 1 rear portion is wound with asbestos rope 5 and is bonded with connecting pipe 6, the linkage section 101 of described corundum outer tube 1 is identical with connecting pipe 6 length, and length is 100mm～150mm, the present embodiment take length as example as 100mm, and the material of described connecting pipe 6 is white steel; The front end of described connecting pipe 6 is welded with joint flange 4, the openend of described white steel inner sleeve 3 is welded with silk 7, the wall thickness of described white steel inner sleeve 3 is 2mm～2.5mm, the wall thickness of described corundum outer tube 1 is 2.5mm～3mm, the thickness of described titanium dioxide binding layer 2 is 2mm～3mm, the present embodiment is taking the wall thickness of white steel inner sleeve 3 as 22mm, and the wall thickness of corundum outer tube 1 is 2.8mm, and the thickness of titanium dioxide binding layer 2 is that 2.5mm is example.
Its concrete making step is as follows:
(1), by titanium dioxide and sodium silicate (Na
2onSiO
2) aqueous solution be 2:1g/mL mixing and stirring according to mass volume ratio, obtain titanium dioxide sticky, the concentration of aqueous solution of described sodium silicate is 220g/L;
(2), get each one of corundum outer tube 1 isometric with thermocouple core and that one end is sealed and Bai Gang inner sleeve 3, corundum outer tube 1 after plug-in mounting and the gap of Bai Gang inner sleeve 3 are 2.5mm, pour in corundum outer tube 1 and fill sticky the titanium dioxide of preparation, guarantee corundum outer tube 1 interior air is discharged completely;
(3), by asbestos rope 5 after the sticky middle dipping of titanium dioxide, be wound around the sticky asbestos rope of dipping titanium dioxide 5 at the linkage section 101 at corundum outer tube 1 rear portion, insert connecting pipe 6, make connecting pipe 6 be connected to the linkage section 101 at corundum outer tube 1 rear portion, corundum outer tube 1 is inserted after connecting pipe 6, by be wrapped in corundum outer tube 1 rear portion linkage section 101 asbestos rope 5 to inboard tamping, and in the process of tamping, constantly add dipping by the mouth of pipe of connecting pipe 6 to the space between corundum outer tube 1 and connecting pipe 6 and have the sticky asbestos rope of titanium dioxide 5;
(4), white steel inner sleeve 3 is inserted and filled in the sticky corundum outer tube 1 of titanium dioxide, ensure that white steel inner sleeve 3 is concentric with corundum outer tube 1, by clean sticky the titanium dioxide overflowing processing;
(5), place after 20h under room temperature, joint flange 4 is welded on to the front end of connecting pipe 6, silk 7 is welded on to the openend of white steel inner sleeve 3, make thermocouple protective casing.This thermocouple protective casing serviceable life in titanium dioxide explained hereafter is 500h～650h.
Embodiment 2
The structure of this thermocouple protective casing is with embodiment 1;
Its concrete making step is as follows:
(1), by titanium dioxide and sodium silicate (Na
2onSiO
2) aqueous solution be 2:1g/mL mixing and stirring according to mass volume ratio, obtain titanium dioxide sticky, the concentration of aqueous solution of described sodium silicate is 210g/L;
(2), get each one of corundum outer tube 1 isometric with thermocouple core and that one end is sealed and Bai Gang inner sleeve 3, corundum outer tube 1 after plug-in mounting and the gap of Bai Gang inner sleeve 3 are 2mm, pour in corundum outer tube 1 and fill sticky the titanium dioxide of preparation, guarantee corundum outer tube 1 interior air is discharged completely;
(3), by asbestos rope 5 after the sticky middle dipping of titanium dioxide, be wound around the sticky asbestos rope of dipping titanium dioxide 5 at the linkage section 101 at corundum outer tube 1 rear portion, insert connecting pipe 6, make connecting pipe 6 be connected to the linkage section 101 at corundum outer tube 1 rear portion, corundum outer tube 1 is inserted after connecting pipe 6, by be wrapped in corundum outer tube 1 rear portion linkage section 101 asbestos rope 5 to inboard tamping, and in the process of tamping, constantly add dipping by the mouth of pipe of connecting pipe 6 to the space between corundum outer tube 1 and connecting pipe 6 and have the sticky asbestos rope of titanium dioxide 5;
(4), white steel inner sleeve 3 is inserted and filled in the sticky corundum outer tube 1 of titanium dioxide, ensure that white steel inner sleeve 3 is concentric with corundum outer tube 1, by clean sticky the titanium dioxide overflowing processing;
(5), place after 18h under room temperature, joint flange 4 is welded on to the front end of connecting pipe 6, silk 7 is welded on to the openend of white steel inner sleeve 3, make thermocouple protective casing.This thermocouple protective casing serviceable life in titanium dioxide explained hereafter is 500h～650h.
Embodiment 3
The structure of this thermocouple protective casing is with embodiment 1;
Its concrete making step is as follows:
(1), by titanium dioxide and sodium silicate (Na
2onSiO
2) aqueous solution be 2:1g/mL mixing and stirring according to mass volume ratio, obtain titanium dioxide sticky, the concentration of aqueous solution of described sodium silicate is 230 g/L;
(2), get each one of corundum outer tube 1 isometric with thermocouple core and that one end is sealed and Bai Gang inner sleeve 3, corundum outer tube 1 after plug-in mounting and the gap of Bai Gang inner sleeve 3 are 3mm, pour in corundum outer tube 1 and fill sticky the titanium dioxide of preparation, guarantee corundum outer tube 1 interior air is discharged completely;
(3), by asbestos rope 5 after the sticky middle dipping of titanium dioxide, be wound around the sticky asbestos rope of dipping titanium dioxide 5 at the linkage section 101 at corundum outer tube 1 rear portion, insert connecting pipe 6, make connecting pipe 6 be connected to the linkage section 101 at corundum outer tube 1 rear portion, corundum outer tube 1 is inserted after connecting pipe 6, by be wrapped in corundum outer tube 1 rear portion linkage section 101 asbestos rope 5 to inboard tamping, and in the process of tamping, constantly add dipping by the mouth of pipe of connecting pipe 6 to the space between corundum outer tube 1 and connecting pipe 6 and have the sticky asbestos rope of titanium dioxide 5;
(4), white steel inner sleeve 3 is inserted and filled in the sticky corundum outer tube 1 of titanium dioxide, ensure that white steel inner sleeve 3 is concentric with corundum outer tube 1, by clean sticky the titanium dioxide overflowing processing;
(5), place after 24h under room temperature, joint flange 4 is welded on to the front end of connecting pipe 6, silk 7 is welded on to the openend of white steel inner sleeve 3, make thermocouple protective casing.This thermocouple protective casing serviceable life in titanium dioxide explained hereafter is 500h～650h.
Claims (7)
1. a thermocouple protective casing, comprise white steel inner sleeve and the corundum outer tube of one end sealing, it is characterized in that: described corundum outer tube is enclosed within on white steel inner sleeve, between white steel inner sleeve and corundum outer tube, fill titanium dioxide binding layer, the linkage section at described corundum outer tube rear portion is wound with asbestos rope and is bonded with connecting pipe, the front end of described connecting pipe is connected with joint flange, the openend of described white steel inner sleeve is connected with a head, the wall thickness of described white steel inner sleeve is 2mm～2.5mm, the wall thickness of described corundum outer tube is 2.5mm～3mm, the thickness of described titanium dioxide binding layer is 2mm～3mm.
2. thermocouple protective casing according to claim 1, is characterized in that: the material of described connecting pipe is white steel.
3. thermocouple protective casing according to claim 1, is characterized in that: the linkage section of described corundum outer tube is identical with connecting pipe length.
4. thermocouple protective casing according to claim 1, is characterized in that: the linkage section of described corundum outer tube and connecting pipe length are 100mm～150mm.
5. the method for making of a kind of thermocouple protective casing as described in claim 1-4, is characterized in that: concrete making step is as follows:
(1), be 2:1g/mL mixing and stirring by the aqueous solution of titanium dioxide and sodium silicate according to mass volume ratio, obtain titanium dioxide sticky;
(2), get each one of corundum outer tube isometric with thermocouple core and that one end is sealed and Bai Gang inner sleeve, corundum outer tube after plug-in mounting and the gap of Bai Gang inner sleeve are 2mm～3mm, pour in corundum outer tube and fill sticky the titanium dioxide of preparation, guarantee corundum overcoat inner air tube is discharged completely;
(3), by asbestos rope after the sticky middle dipping of titanium dioxide, be wound around the sticky asbestos rope of dipping titanium dioxide at the linkage section at corundum outer tube rear portion, insert connecting pipe, make connecting pipe be connected to the linkage section at corundum outer tube rear portion;
(4), white steel inner sleeve is inserted and filled in the sticky corundum outer tube of titanium dioxide, ensure that white steel inner sleeve is concentric with corundum outer tube, by clean sticky the titanium dioxide overflowing processing;
(5), place after 18h～24h under room temperature, joint flange is welded on to the front end of connecting pipe, silk head is welded on to the openend of white steel inner sleeve, make thermocouple protective casing.
6. the method for making of a kind of thermocouple protective casing according to claim 5, is characterized in that: described sodium silicate is Na
2onSiO
2, the concentration of aqueous solution of sodium silicate is 210g/L～230 g/L.
7. the method for making of a kind of thermocouple protective casing according to claim 5; it is characterized in that: step (3) is inserted corundum outer tube after connecting pipe; by be wrapped in corundum outer tube rear portion linkage section asbestos rope to inboard tamping, and in the process of tamping, constantly add dipping by the mouth of pipe of connecting pipe to the space between corundum outer tube and connecting pipe and have the sticky asbestos rope of titanium dioxide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410167452.9A CN103940524B (en) | 2014-04-24 | 2014-04-24 | A kind of thermocouple protective casing and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410167452.9A CN103940524B (en) | 2014-04-24 | 2014-04-24 | A kind of thermocouple protective casing and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103940524A true CN103940524A (en) | 2014-07-23 |
| CN103940524B CN103940524B (en) | 2016-09-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410167452.9A Active CN103940524B (en) | 2014-04-24 | 2014-04-24 | A kind of thermocouple protective casing and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105445322A (en) * | 2015-12-02 | 2016-03-30 | 东北大学 | Method for measuring interface heat transfer coefficient under pressurization condition |
| CN113125027A (en) * | 2021-04-19 | 2021-07-16 | 福建康碳复合材料科技有限公司 | Anti-adhesion method between ceramic thermocouple and corundum ceramic protection tube for vapor deposition furnace |
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| JP2002188965A (en) * | 2000-12-21 | 2002-07-05 | Isuzu Ceramics Res Inst Co Ltd | Thermocouple |
| CN201622130U (en) * | 2010-03-24 | 2010-11-03 | 天津市中环温度仪表有限公司 | Blast furnace air leakage-proof fast-assembling thermoelectric couple |
| CN102889941A (en) * | 2011-07-17 | 2013-01-23 | 赵宽 | Quartz pipe sleeve-isolated and sealed long-service life thermocouple |
| CN202956215U (en) * | 2012-12-10 | 2013-05-29 | 重庆洋泰科技发展有限公司 | Constant-pressure air blowing thermocouple |
| CN203274946U (en) * | 2013-04-26 | 2013-11-06 | 江苏杰克仪表有限公司 | Dual-wire armored thermocouple |
-
2014
- 2014-04-24 CN CN201410167452.9A patent/CN103940524B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002188965A (en) * | 2000-12-21 | 2002-07-05 | Isuzu Ceramics Res Inst Co Ltd | Thermocouple |
| CN201622130U (en) * | 2010-03-24 | 2010-11-03 | 天津市中环温度仪表有限公司 | Blast furnace air leakage-proof fast-assembling thermoelectric couple |
| CN102889941A (en) * | 2011-07-17 | 2013-01-23 | 赵宽 | Quartz pipe sleeve-isolated and sealed long-service life thermocouple |
| CN202956215U (en) * | 2012-12-10 | 2013-05-29 | 重庆洋泰科技发展有限公司 | Constant-pressure air blowing thermocouple |
| CN203274946U (en) * | 2013-04-26 | 2013-11-06 | 江苏杰克仪表有限公司 | Dual-wire armored thermocouple |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105445322A (en) * | 2015-12-02 | 2016-03-30 | 东北大学 | Method for measuring interface heat transfer coefficient under pressurization condition |
| CN113125027A (en) * | 2021-04-19 | 2021-07-16 | 福建康碳复合材料科技有限公司 | Anti-adhesion method between ceramic thermocouple and corundum ceramic protection tube for vapor deposition furnace |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103940524B (en) | 2016-09-21 |
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Address after: 121000 Jin Ti Road 1, Taihe District, Jinzhou, Liaoning Patentee after: Jinzhou titanium Limited by Share Ltd Address before: 121000 alloy Li 59, Taihe District, Liaoning, Jinzhou Patentee before: Jinzhou Titanium Industry Co., Ltd. |
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| CP01 | Change in the name or title of a patent holder |
Address after: 121000 Kam Ti Road, Taihe District, Jinzhou, Liaoning Province, No. 1 Patentee after: CITIC titanium Limited by Share Ltd Address before: 121000 Kam Ti Road, Taihe District, Jinzhou, Liaoning Province, No. 1 Patentee before: Jinzhou titanium Limited by Share Ltd |
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