CN85104109A - The thermocouple thermometer casing assembling - Google Patents
The thermocouple thermometer casing assembling Download PDFInfo
- Publication number
- CN85104109A CN85104109A CN 85104109 CN85104109A CN85104109A CN 85104109 A CN85104109 A CN 85104109A CN 85104109 CN85104109 CN 85104109 CN 85104109 A CN85104109 A CN 85104109A CN 85104109 A CN85104109 A CN 85104109A
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- Prior art keywords
- thermocouple thermometer
- thermometer casing
- tube head
- fluid
- wall
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- Monitoring And Testing Of Nuclear Reactors (AREA)
Abstract
One by with the aperture on the wall, make the tube head structure of permanent installation, wherein put the temperature sense detection sensing primary element in a thermocouple thermometer casing, the sleeve pipe, can with wall in addition the fluid of side flow contact closely, with the temperature of this fluid of sensing.
Description
The temperature survey of the relevant fluid of the present invention.Particularly, the installing device of the relevant temperature survey primary control element of the present invention.
To the fluid that flows through from pipeline, when its temperature of sensing, the measure of standard is to bore a hole on pipeline, and temperature sense detection sensing primary element is installed, and makes it the fluid in the nearly pipeline of generation as far as possible.In order in sensing element and pipeline, between the fluid, to make the pressure protect border one, all thermocouple thermometer casing is installed in the tube head that penetrates duct wall, shape pouch or sleeve are placed on the inside to sensing element.For a long time, thermocouple thermometer casing all is regarded as the simple together next door between the fluid of sensing element and dut temperature.Certainly the reaction of the thin more sensing element of tube wall is fast more.
In the environment of nuclear reactor, the power of the thickness of duct wall and the fluid that flows by pipeline all requires tube head thermocouple thermometer casing and primary control element that special arrangement is arranged and measures.The thermocouple sheath of installing in tube head must not be done damaging vibrations or destructive stress takes place.If vibrations and stress can cause fault, the specification of thermocouple thermometer casing just needs change so.
In the measure of adopting at present, when the hot merit of making equipment can be test, ANPPI unit thermocouple thermometer casing was just malfunctioning.The prototype of ANPPI unit thermocouple thermometer casing and tube head assembly, there is a radially little gap (.001-.006 inch) in the last 2.13 inches place between tube head lower end and thermocouple thermometer casing.Because the vibrations that pipe stream causes, and because the free-running frequency of thermocouple thermometer sleeve is near the eddy current frequency that dissipates, relative motion between thermocouple thermometer casing and the tube head has caused the loss of tube head and thermocouple thermometer casing, and thermocouple thermometer casing ruptures at the section near inner-walls of duct as a result.The high-frequency vibration of thermocouple thermometer casing can also make its narrow part and the intersection between the expansion partly of upper end damage.
When making the primary element mounting structure of sensing fluid temperature (F.T.), in technology or the existing skill field, all to get used to thermocouple thermometer casing is fixed in the tube head structure now, the tube head structure is fixed in the hole on the pipeline that fluid passes through.If thermocouple thermometer casing does not have enough hardness, sleeve pipe and sensing element are all damaged.
Need a kind of thermocouple thermometer casing tube head structure, can lower the destructive vibration of thermocouple thermometer casing, and keep simultaneously the needed primary element temperature sensing time.
The present invention considers to improve the free-running frequency of thermocouple thermometer casing, makes it to leave potential eddy current dissipation frequency range.
The present invention also considers to eliminate the gap, thereby eliminates the motion of support member between tube head and the thermocouple thermometer casing.
The present invention also considers a kind of arrangement, uses and reduces the possibility that eddy current dissipates.
The present invention also considers in the end of tube head first circular cone to be set, and second circular cone is set on thermocouple thermometer casing.Two circular cones lock mutually by the threaded connector on thermocouple thermometer casing and the tube head top.
Other purpose of the present invention, advantage and characteristics, all people who is familiar with one's own profession skill are studying this printed instructions, behind claim and the accompanying drawing, can see clearly.
It in the accompanying drawing cross sectional elevation of realizing a thermocouple thermometer casing of the present invention.
Accompanying drawing discloses wall 1 and a primary control element 3 or a temperature sensing structure of having bored the pipeline or the vessel 2 in hole, be installed in pipeline in the very approaching place of fluid passed through.For primary control element have under the protective condition install, sensing temperature, a tube head structure 5, put in the hole 6 on the duct wall.Tube head structure 5 has a cylindrical part 7, and the location is welded on the duct wall in hole 6, and its superstructure 8 is stayed the outside of pipeline.Secondly, what must see is in the part of the superstructure formation tube head of pipeline outside, inserts for a thermocouple thermometer casing 9.Sleeve pipe 9 passes tube head and puts in the fluid that flows through in the pipeline.How fastened to each other tube head structure and thermocouple thermometer casing be, discloses to some extent in hereinafter.At present, tube head (superstructure that comprises it) is used as the main basis that thermocouple thermometer casing and its temperature sense detection sensing primary element 3 are installed.In the past,, just it can be eliminated with the present invention to the weakness that the heat test that tube head and thermocouple thermometer casing carried out discloses out.
The thickness of duct wall 2 is assumed to be 3 inches to 4 inches.The base diameter of thermocouple thermometer casing is.375, stretch into the part of fluid and count 2 1/2 inches from inner-walls of duct.These are measured when doing to change and need be undertaken by guidance of the present invention.
The diameter that increases thermocouple thermometer casing just can improve its hardness, its free-running frequency of corresponding raising.According to experience of the present invention, the diameter of thermocouple thermometer casing is located more than duct wall, need be increased to the .700 inch from .375, and not increase the external diameter of tube head.Thermocouple thermometer casing damages at the trial, and its diameter also is increased to the .500 inch from .375 near the inner-walls of duct place that damages taking place, and the length that increases diameter in duct wall has defined in advance.The external diameter of thermocouple thermometer casing is received little gradually, reaches the size of its original diameter in end.Requiring the thermocouple thermometer casing end that less diameter is arranged, is in order to keep the thermotonus time of primary control element 3.
In order to eliminate the gap at support member place between thermocouple thermometer casing and the tube head, in the design of thermocouple thermometer casing, require it is locked in tube head.The power that a prestrain is arranged, be subjected to the circular cone 10 on the thermocouple thermometer casing and the cylindrical part 7 of tube head that cooperates with this circular cone on the restriction of circular cone 11.The power of this prestrain is kept by the screw thread 13 on the screw thread 12 on thermocouple thermometer casing top and the tube head that is engaged with.
Previous some thermocouple thermometer casings of doing test at them and inner-walls of duct infall, were found fatigue phenomenon.Be exposed to the part thermocouple thermometer casing in the streaming flow,, the characteristic similar to semi-girder arranged in the place of internal diameter of the pipeline flexibility maximum.In the present invention, the stress in the cross section here because 2.4 times of the sectional area of thermocouple thermometer casing increases, thus can reduce.This makes the section modulus increase 2.6 times.The section modulus is the parameter of decision beam arm bending strength.So for similar bending load, relevant stress also descends 2.6 times.Thermocouple thermometer casing inserts the length in the streaming flow, also reduces to 2.125 inches from 2.5.This also helps to reduce the bending load on the thermocouple thermometer casing.The thermocouple thermometer casing top end diameter enlarges partly and the stress of body junction, because sectional area has increased 5.5 times and decline to some extent.And reduced the effect that stress is concentrated owing to having increased big inner chamber 15.
Thermocouple thermometer casing inserts the transition circular cone 16 on flowing partly, has reduced the effect that eddy current dissipates.Circular cone is partly because it changes its diameter along the length direction of thermocouple thermometer casing, so can prevent the appearance of the phenomenon of eddy current dissipation clocklike.Taper by desirable thermocouple thermometer sleeve preferably reach on the point, but this is unpractiaca always, because the ability that major diameter partly can change the rapid sensing temperature of temperature sensor has adverse influence.
Welded seal 17 is arranged on thermocouple thermometer top and tube head, and the pressure of convection cell seals.Chrome plating on the support circular cone and the screw thread on the thermocouple thermometer casing provide a crust, the friction and the scratch of thermocouple sheath when having reduced to install.
According to the above, as can be seen the present invention be fit to very much obtain above fixed all purposes and target, and other inherent advantages of obviously possessing of this apparatus.
The derivation combination that it will be appreciated that some characteristic and factor also is available, and can indicate with other characteristics and derive from the relation of combination and used.This considers in the present invention, should belong to scope of the present invention.
Since have many can be in order to realizing embodiment of the present invention, and do not depart from the scope of the present invention, should be understood that what this paper proposed, or all expressed in the accompanying drawings items, all belong to the meaning that explains orally character and do not have the limitation done.
Claims (2)
1, a kind of installing device of the primary control element to temperature-responsive, comprising:
A perisporium that holds a kind of fluid, the temperature of convection cell is carried out sensing by an aperture on the wall,
A tube head structure of installing on wall by the aperture seals on wall,
A thermocouple thermometer casing that sets stretches in the fluid by tube head, and the internal diameter of its diameter and tube head is airtight, increasing the free-running frequency of thermocouple thermometer casing, and makes it to leave the scope of potential eddy current dissipation frequency,
A temperature primary control element stretches along the thermocouple thermometer casing length direction, in order to the temperature of sensing through the fluid of thermocouple thermometer casing wall,
First circular cone that on the tube head inside surface, forms,
Second circular cone that forms on the thermocouple thermometer casing outside surface and first circular cone engage, with the restrictive axial preload force,
Being threadedly engaged with between thermocouple thermometer casing and the tube head used the maintenance preload force,
Cone on the thermocouple thermometer casing S part stretches in fluid, in case the eddy current dissipation,
The seal welding of thermocouple thermometer casing upper end and tube head seals in order to fluid pressure.
2, as the installing device in 1 of the claim the, still: have elongation that thermocouple thermometer casing stretches into fluid partly, in order to reduce with the folding s tress on the wall internal diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN85104109A CN85104109B (en) | 1985-05-30 | 1985-05-30 | Sheath assembly for thermocouple thermometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN85104109A CN85104109B (en) | 1985-05-30 | 1985-05-30 | Sheath assembly for thermocouple thermometer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN85104109A true CN85104109A (en) | 1986-12-10 |
| CN85104109B CN85104109B (en) | 1988-06-15 |
Family
ID=4793639
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN85104109A Expired CN85104109B (en) | 1985-05-30 | 1985-05-30 | Sheath assembly for thermocouple thermometer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN85104109B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102088260A (en) * | 2009-12-02 | 2011-06-08 | Abb技术股份公司 | Autonomer temperature transmitter |
| CN101608953B (en) * | 2008-06-19 | 2012-05-23 | 北京航空航天大学 | Method and device for measuring temperature and heat flow distribution on internal face of combustion chamber |
| CN103616083A (en) * | 2013-11-14 | 2014-03-05 | 中国天辰工程有限公司 | Thermowell |
| CN105333969A (en) * | 2015-12-04 | 2016-02-17 | 中国飞机强度研究所 | Temperature measuring device |
-
1985
- 1985-05-30 CN CN85104109A patent/CN85104109B/en not_active Expired
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101608953B (en) * | 2008-06-19 | 2012-05-23 | 北京航空航天大学 | Method and device for measuring temperature and heat flow distribution on internal face of combustion chamber |
| CN102088260A (en) * | 2009-12-02 | 2011-06-08 | Abb技术股份公司 | Autonomer temperature transmitter |
| CN103616083A (en) * | 2013-11-14 | 2014-03-05 | 中国天辰工程有限公司 | Thermowell |
| CN105333969A (en) * | 2015-12-04 | 2016-02-17 | 中国飞机强度研究所 | Temperature measuring device |
| CN105333969B (en) * | 2015-12-04 | 2018-07-13 | 中国飞机强度研究所 | A kind of temperature measuring equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN85104109B (en) | 1988-06-15 |
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