CN212158857U - Anticorrosion thermocouple sheath for measuring concentrated hydrochloric acid - Google Patents
Anticorrosion thermocouple sheath for measuring concentrated hydrochloric acid Download PDFInfo
- Publication number
- CN212158857U CN212158857U CN202021381170.6U CN202021381170U CN212158857U CN 212158857 U CN212158857 U CN 212158857U CN 202021381170 U CN202021381170 U CN 202021381170U CN 212158857 U CN212158857 U CN 212158857U
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- CN
- China
- Prior art keywords
- flange
- sheath
- sheath body
- hydrochloric acid
- concentrated hydrochloric
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 title claims abstract description 24
- 229910052715 tantalum Inorganic materials 0.000 claims abstract description 21
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 claims abstract description 21
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims abstract description 18
- 239000004810 polytetrafluoroethylene Substances 0.000 claims abstract description 18
- -1 polytetrafluoroethylene Polymers 0.000 claims abstract description 17
- 238000007789 sealing Methods 0.000 claims abstract description 14
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 claims abstract 2
- 230000008878 coupling Effects 0.000 claims description 2
- 238000010168 coupling process Methods 0.000 claims description 2
- 238000005859 coupling reaction Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 6
- 238000005260 corrosion Methods 0.000 abstract description 5
- 230000007797 corrosion Effects 0.000 abstract description 4
- 238000005259 measurement Methods 0.000 abstract description 3
- 230000002378 acidificating effect Effects 0.000 abstract description 2
- 239000000126 substance Substances 0.000 abstract 1
- 239000000463 material Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 239000002861 polymer material Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 229910000619 316 stainless steel Inorganic materials 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 229910000589 SAE 304 stainless steel Inorganic materials 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 238000000748 compression moulding Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910000856 hastalloy Inorganic materials 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The utility model relates to a thermocouple, especially an anticorrosive thermocouple sheath for concentrated hydrochloric acid is measured. The novel sheath comprises a sheath body, wherein an axial blind hole is formed in the rotation center of the sheath body, a flange is fixedly connected to the opening end of the sheath body, the inner side face of the flange is a sealing face, a tantalum sleeve is arranged outside the sheath body and located on the sealing face side of the flange, a flange structure is arranged at the open end of the tantalum sleeve, the outer side face of the flange structure is in sealing connection with the inner side face of the flange, a polytetrafluoroethylene lining is coated outside the tantalum sleeve, and the tetrafluoroethylene lining outside the flange structure is in sealing connection with the inner side face of the flange. Compared with the prior art, the utility model discloses a double-deck anticorrosive technique effectively improves the corrosion protection of anticorrosive thermocouple sheath, can be applied to the measurement of concentrated hydrochloric acid and other acidic substance under the various operating modes, promotes more than 3 years with life at least.
Description
Technical Field
The utility model relates to a thermocouple, especially an anticorrosive thermocouple sheath for concentrated hydrochloric acid is measured.
Background
When the temperature is measured by an acid medium, a stainless steel sheath is generally lined with polytetrafluoroethylene, an outer lining is made of an anticorrosive metal material or a sheath made of an integral anticorrosive metal material is generally adopted. When the temperature of the concentrated hydrochloric acid is measured, the measured temperature is 100-150 ℃, the service lives of the metal tantalum sheath, the hastelloy sheath and the winding polytetrafluoroethylene sheath are all lower than the normal value, the analysis reason is that the ion activity of the concentrated hydrochloric acid is high at the temperature, so that the metal corrosion resistance is greatly reduced, and the winding polytetrafluoroethylene lining layer has good corrosion resistance but cannot prevent chloride ions from permeating to directly corrode the stainless steel sleeve inside.
With the continuous expansion of the application fields of resin types and polymer materials, the molding processing methods of polymer materials are gradually changed. The compression moulding method for polytetrafluoroethylene is that the powder, granular, agglomerate and sheet material, even the material blank made into the shape similar to that of the product, is put in the cavity of heated mould, then the mould is closed and pressed to make it be formed and solidified or vulcanized, then the product is obtained through demoulding, and said method is specially suitable for forming and processing thermosetting plastics. The disadvantages are long production period, low efficiency and poor product size precision.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the technical problem and providing an anticorrosive thermocouple sheath for concentrated hydrochloric acid measurement, improving its life.
The utility model provides a technical scheme that its technical problem adopted is:
the utility model provides an anticorrosive thermocouple sheath for concentrated hydrochloric acid is measured, including the sheath body, the centre of rotation of sheath body is equipped with axial blind hole, the open end rigid coupling flange of sheath body, the medial surface of flange is sealed face, this external tantalum sleeve pipe that is equipped with of sheath, tantalum sleeve pipe is located the sealed face side of flange, tantalum sheathed tube opening end is equipped with the flange structure, the lateral surface of flange structure and the medial surface sealing connection of flange, the outer cladding polytetrafluoroethylene lining of tantalum sleeve pipe, the outer polytetrafluoroethylene lining of flange structure and the medial surface sealing connection of flange.
Adopt above-mentioned technical scheme the utility model discloses compare with prior art, beneficial effect is: the utility model discloses a double-deck anticorrosive technique effectively improves the corrosion resisting property of anticorrosive thermocouple sheath, can be applied to the measurement of concentrated hydrochloric acid and other acidic material under the various operating modes, compares life and promotes more than 3 years at least with prior art.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention;
FIG. 2 is a schematic view of the processing of the PTFE liner of the embodiment of the present invention.
In the figure: a sheath body 1; 1-1 of blind holes; a flange 2; a tantalum sleeve 3; a flange structure 3-1; a polytetrafluoroethylene lining layer 4; a mold 5; and a pressurizing hole 5-1.
Detailed Description
The present invention will be further described in detail with reference to the accompanying drawings and examples.
Referring to fig. 1, the present embodiment is an anticorrosive thermocouple sheath for measuring concentrated hydrochloric acid, which is composed of a sheath body 1, a flange 2, a tantalum sleeve 3, a polytetrafluoroethylene lining 4 and the like, wherein the sheath body 1 is 304 or 316 stainless steel. An axial blind hole 1-1 is processed at the rotation center of the sheath body 1, a flange 2 is welded at the opening end of the sheath body 1, and the inner side surface (the right side surface as shown in the figure) of the flange 2 is a sealing surface. The sheath body 1 is sleeved with a tantalum sleeve 3, the tantalum sleeve 3 is positioned on the inner side face of the flange 2, and the wall thickness of the tantalum sleeve 3 is 1 mm.
The inner end of the tantalum sleeve 3 is closed, the outer end of the tantalum sleeve 3 is open, the open end is provided with a flange structure 3-1, the flange structure 3-1 is in welded connection with the outer end opening of the tantalum sleeve 3, a welding line is located at the joint of the sealing surface of the sheath body 1 and the sealing surface of the flange 2, after the welding connection, the sealing surface of the flange 2 is effectively protected in an anti-corrosion mode, comprehensive protection is achieved, and the outer side face of the flange structure 3-1 is in sealed connection with the inner side face of the flange 2. The tantalum sleeve 3 is externally coated with a polytetrafluoroethylene lining 4, the wall thickness of the polytetrafluoroethylene lining 4 is 1mm, and the polytetrafluoroethylene lining 4 outside the flange structure 3-1 is in sealing connection with the inner side face of the flange 2.
The processing procedure of the polytetrafluoroethylene lining 4 of this example is (shown in fig. 2): the method comprises the steps of connecting a mold 5 and a flange 2, filling powdery polytetrafluoroethylene 4 into the mold 5, heating to 180-200 ℃ to melt the polytetrafluoroethylene 4, boosting the pressure to 10-15 MPa through a pressurizing hole 5-1 within 2 minutes by using a hydraulic tool, keeping the temperature and the pressure for about 25-30 minutes, cooling to 40 ℃ by using circulating water at a speed of less than 10 ℃/min, unloading, taking out, placing in a normal-temperature environment for more than 12 hours, and machining by using a machine tool to enable the thickness of the polytetrafluoroethylene lining 4 to reach 1mm and the surface to be smooth.
Claims (1)
1. The utility model provides an anticorrosive thermocouple sheath for concentrated hydrochloric acid is measured, includes the sheath body, and the centre of rotation of sheath body is equipped with axial blind hole, the open end rigid coupling flange of sheath body, and the medial surface of flange is sealed face, its characterized in that: the sheath body is externally provided with a tantalum sleeve, the tantalum sleeve is positioned on the sealing surface side of the flange, the open end of the tantalum sleeve is provided with a flange structure, the outer side surface of the flange structure is in sealing connection with the inner side surface of the flange, the tantalum sleeve is externally coated with a polytetrafluoroethylene lining, and the tetrafluoroethylene lining outside the flange structure is in sealing connection with the inner side surface of the flange.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021381170.6U CN212158857U (en) | 2020-07-14 | 2020-07-14 | Anticorrosion thermocouple sheath for measuring concentrated hydrochloric acid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021381170.6U CN212158857U (en) | 2020-07-14 | 2020-07-14 | Anticorrosion thermocouple sheath for measuring concentrated hydrochloric acid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212158857U true CN212158857U (en) | 2020-12-15 |
Family
ID=73700329
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021381170.6U Active CN212158857U (en) | 2020-07-14 | 2020-07-14 | Anticorrosion thermocouple sheath for measuring concentrated hydrochloric acid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212158857U (en) |
-
2020
- 2020-07-14 CN CN202021381170.6U patent/CN212158857U/en active Active
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|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 063305 Nanpu Development Zone, Hebei, Tangshan City Patentee after: Tangshan Sanyou Silicon Industry Co.,Ltd. Address before: 063305 Nanpu Development Zone, Hebei, Tangshan City Patentee before: SANYOU SILICON INDUSTRY Co.,Ltd. |