CN203024897U - Thermocouple structure under high temperature and high pressure condition - Google Patents
Thermocouple structure under high temperature and high pressure condition Download PDFInfo
- Publication number
- CN203024897U CN203024897U CN 201220702140 CN201220702140U CN203024897U CN 203024897 U CN203024897 U CN 203024897U CN 201220702140 CN201220702140 CN 201220702140 CN 201220702140 U CN201220702140 U CN 201220702140U CN 203024897 U CN203024897 U CN 203024897U
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- thermocouple
- seat
- installation
- thermopair
- installing base
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Abstract
The utility model belongs to the technical field of high-voltage measurement of thermocouples, and particularly relates to a thermocouple structure under a high temperature and high pressure condition. The thermocouple structure provided by the utility model comprises a thermocouple body, a thermocouple installing base and a loop, wherein a contacting part of the thermocouple body, contacted with the thermocouple installing base, has a certain circular arc degree, a contacting part of the thermocouple installing base, contacted with the thermocouple body, is provided with a conical surface, and a circular arc of the thermocouple body and the conical surface of the thermocouple installing base are tangent; and the outer wall of the thermocouple installing base is provided with a thread, the inner wall of the loop is provided with a thread matched with the thread at the outer wall of the thermocouple installing base, an outer covering cover is pressed on the upper part of the thermocouple body, and the seal between the thermocouple body and the thermocouple installing base is realized through the pretightening force of the threads. The thermocouple structure provided by the utility model can effectively avoid the problem that the threads are clamped, can obviously improve the response speed, and can reduce measuring errors.
Description
Technical field
The utility model belongs to thermopair High-Voltage Measurement Technology field, is specifically related to thermocouple structure under a kind of high-temperature and high-pressure conditions.
Background technology
The thermocouple structure that generally adopts in prior art comprises two kinds: screw thread installing type thermopair and whole hole drilling type thermopair.
As shown in Figure 1, screw thread installing type thermopair, it is installed sealing and is fixed against thread size and flat pad, when thermopair and mount pad are dissimilar metal, often can the thermal stress due to dissimilar metal cause sealing thread to kill under high-temperature and high-pressure conditions.
According to " HG/T20507-2000 instrument and meter for automation Selection and Design regulation "; under the condition of high voltage greater than 10MPa; should select whole hole drilling type thermopair; the thermopair of this form adopts straight shape or taper protective casing; existing standard product protection casing diameter is thick, wall thickness is thicker, thermopair does not directly contact with medium; cause long (60s ~ 120s), not practical requirement of thermopair response time.
The utility model content
The utility model technical issues that need to address are: propose thermocouple structure under a kind of high-temperature and high-pressure conditions, can effectively avoid sealing thread to kill problem, can significantly improve again response speed, reduce measuring error.
The technical solution of the utility model is as described below:
Thermocouple structure under a kind of high-temperature and high-pressure conditions comprises thermopair body and the installation of TC seat, both contacts; Thermocouple structure also comprises kink; Described thermopair body and the contacted part of the installation of TC seat have certain circular arc degree, and described the installation of TC seat and the contacted part of thermopair body are the conical surface, and the conical surface of the circular arc of thermopair body and the installation of TC seat is tangent; The installation of TC seat outer wall is provided with screw thread, the kink inwall is provided with the screw thread that is complementary with the installation of TC seat outer wall, outer upper shield is pressed in the top of thermopair body, is threaded with the installation of TC seat, and the pretightning force by screw thread realizes the sealing between thermopair body and the installation of TC seat.
As preferred version, the installation of TC seat is welded on return, and kink and the installation of TC seat adopt the material identical with return, and this material needs less than the thermal expansivity of thermopair body material.
Kink, the installation of TC seat and return can adopt the P91 shaped material in the ASME standard, and the thermopair body can adopt 316L type stainless steel.
The beneficial effects of the utility model are:
Thermocouple structure under high-temperature and high-pressure conditions of the present utility model; adopt self-tightening type thermopair Seal Design; do not need to use gasket seal and protection sheath; thermopair can directly contact with pipeline internal medium; can effectively avoid sealing thread to kill problem, can significantly improve again response speed, reduce measuring error.
By finite element method, this structure has been carried out the analysis of sealing and thermal stress, result of calculation shows that this structure is minimum and can satisfy 15MPa, the requirement of using under 350 ℃ of conditions and the problem of killing that sealing thread can not occur; Simultaneously, this structure test specimen has been carried out cold hydrostatic test, test findings shows, this structure can be born the static pressure of 70MPa at least.
Description of drawings
Fig. 1 is screw thread installing type thermocouple structure schematic diagram of the prior art;
Fig. 2 is thermocouple structure schematic diagram under high-temperature and high-pressure conditions of the present utility model;
Fig. 3 is the kink schematic diagram of thermocouple structure under the utility model high-temperature and high-pressure conditions;
Fig. 4 is the vertical view of Fig. 3;
Fig. 5 is the installation of TC seat schematic diagram of thermocouple structure under the utility model high-temperature and high-pressure conditions;
Fig. 6 is the thermopair body schematic diagram of thermocouple structure under the utility model high-temperature and high-pressure conditions.
In figure, 1-kink, 2-the installation of TC seat, 3-thermopair body.
Embodiment
Below in conjunction with drawings and Examples, thermocouple structure under high-temperature and high-pressure conditions of the present utility model is elaborated.
Thermocouple structure under high-temperature and high-pressure conditions of the present utility model comprises kink 1, thermopair body 3 and the installation of TC seat 2.Wherein, described thermopair body 3 has certain circular arc degree with the contacted part of the installation of TC seat 2; Described the installation of TC seat 2 is the conical surface with the contacted part of thermopair body 3; The conical surface of the circular arc of thermopair body 3 and the installation of TC seat 2 is tangent; The installation of TC seat 2 outer walls are provided with screw thread, kink 1 inwall is provided with the screw thread that is complementary with the installation of TC seat 2 outer walls, outer upper shield is pressed in the top of thermopair body 3, be threaded with the installation of TC seat 2, the pretightning force by screw thread realizes the sealing between thermopair body 3 and the installation of TC seat 2.
The installation of TC seat 2 is welded on return, and kink 1 and the installation of TC seat 2 adopt the material identical with return, and this material needs less than the thermal expansivity of thermopair body 3 materials.In the present embodiment, kink 1, the installation of TC seat 2 and return adopt the P91 shaped material in the ASME standard, and thermopair body 3 adopts 316L type stainless steel.
Under high-temperature condition, due to the thermal expansivity of the stainless steel thermal expansivity greater than P91, above-mentioned material selection scheme, the applying meeting that makes thermopair body 3 and the installation of TC seat 2 under hot conditions is consolidation more, realizes self-energized seal.Adopt this kind scheme, thermal stress major part between dissimilar metal is shared by the applying place of thermopair body 3 and the installation of TC seat 2, can not cause excessive stress at the connection of thread of kink 1 and the installation of TC seat 2, cause the screw thread surrender and cause the thread biting locking problem.
Claims (3)
1. thermocouple structure under a high-temperature and high-pressure conditions, comprise thermopair body (3) and the installation of TC seat (2), both contacts, and it is characterized in that: thermocouple structure also comprises kink (1); Described thermopair body (3) has certain circular arc degree with the contacted part of the installation of TC seat (2), described the installation of TC seat (2) is the conical surface with the contacted part of thermopair body (3), and the conical surface of the circular arc of thermopair body (3) and the installation of TC seat (2) is tangent; The installation of TC seat (2) outer wall is provided with screw thread, kink (1) inwall is provided with the screw thread that is complementary with the installation of TC seat (2) outer wall, outer upper shield is pressed in the top of thermopair body (3), be threaded with the installation of TC seat (2), the pretightning force by screw thread realizes the sealing between thermopair body (3) and the installation of TC seat (2).
2. thermocouple structure under high-temperature and high-pressure conditions according to claim 1, it is characterized in that: the installation of TC seat (2) is welded on return, kink (1) and the installation of TC seat (2) adopt the material identical with return, and this material needs less than the thermal expansivity of thermopair body (3) material.
3. thermocouple structure under high-temperature and high-pressure conditions according to claim 2, is characterized in that: the P91 shaped material in kink (1), the installation of TC seat (2) and return employing ASME standard, thermopair body (3) employing 316L type stainless steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220702140 CN203024897U (en) | 2012-12-17 | 2012-12-17 | Thermocouple structure under high temperature and high pressure condition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220702140 CN203024897U (en) | 2012-12-17 | 2012-12-17 | Thermocouple structure under high temperature and high pressure condition |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203024897U true CN203024897U (en) | 2013-06-26 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220702140 Expired - Lifetime CN203024897U (en) | 2012-12-17 | 2012-12-17 | Thermocouple structure under high temperature and high pressure condition |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203024897U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103868614A (en) * | 2012-12-17 | 2014-06-18 | 核动力运行研究所 | Thermoelectric couple structure under high-temperature and high-pressure conditions |
| CN107606937A (en) * | 2017-09-07 | 2018-01-19 | 韶关市欧莱高新材料有限公司 | A kind of high-temperature atmosphere sintering furnace of the sealed thermocouple of band |
-
2012
- 2012-12-17 CN CN 201220702140 patent/CN203024897U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103868614A (en) * | 2012-12-17 | 2014-06-18 | 核动力运行研究所 | Thermoelectric couple structure under high-temperature and high-pressure conditions |
| CN103868614B (en) * | 2012-12-17 | 2017-02-22 | 核动力运行研究所 | Thermoelectric couple structure under high-temperature and high-pressure conditions |
| CN107606937A (en) * | 2017-09-07 | 2018-01-19 | 韶关市欧莱高新材料有限公司 | A kind of high-temperature atmosphere sintering furnace of the sealed thermocouple of band |
| CN107606937B (en) * | 2017-09-07 | 2023-05-09 | 广东欧莱高新材料股份有限公司 | High-temperature atmosphere sintering furnace with sealed thermocouple |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 74501 mailbox 430074, Hubei City, Wuhan Province Patentee after: Nuclear Power Running Inst. Patentee after: China Nuclear Power Operation Technology Co., Ltd. Address before: 74501 mailbox 430074, Hubei City, Wuhan Province Patentee before: Nuclear Power Running Inst. Patentee before: China Nuclear Power Operation Technology Co.,Ltd. |