CN201955158U - Low-resistance high-strength and abrasion-proof thermocouple with protection sleeve - Google Patents
Low-resistance high-strength and abrasion-proof thermocouple with protection sleeve Download PDFInfo
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- CN201955158U CN201955158U CN2010202684794U CN201020268479U CN201955158U CN 201955158 U CN201955158 U CN 201955158U CN 2010202684794 U CN2010202684794 U CN 2010202684794U CN 201020268479 U CN201020268479 U CN 201020268479U CN 201955158 U CN201955158 U CN 201955158U
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Abstract
The utility model relates to a low-resistance high-strength and abrasion-proof thermocouple with a protection sleeve, comprising a thermocouple alloy, a terminal box support sleeve and a terminal box, also comprising a streamline abrasion-proof sleeve (1), wherein a cross section of the streamline abrasion-proof sleeve (1), which is inserted into a device or a pipe, is of a streamline shape, a water-drop shape or a similarly streamline shape and water-drop shape; the front of the streamline abrasion-proof sleeve is circular, and the rear of the streamline abrasion-proof sleeve is sharp; the middle of the streamline abrasion-proof sleeve (1) is provided with a cavity for containing the thermocouple alloy. The thermocouple can also comprise a process connecting element with an installation direction indicator which is a convex object, a groove, a graved line or an arrow and the like on the process connecting element. The low-resistance high-strength and abrasion-proof thermocouple disclosed by the utility model is capable of achieving technical effects such as the minimum resistance and the minimum frication force of the sleeve in the pipe and relatively prolonged service life.
Description
Technical field
The utility model relates to a kind of thermopair technology, particularly a kind of lower resistance high-strength abrasion-proof thermopair with protective casing.
Background technology
The thermoelectricity of industrial automation field a large amount of at present use band protective casing is thermal resistance occasionally; no matter be traditional mill run or various wear-resisting patented product; its protective casing profile all is the thin slightly taper shape of tapering of the thick leading section of circle or root; the sleeve pipe job operation of this contour structures is simple; corresponding cheap for manufacturing cost; but when industry spot is installed and used in pipeline or equipment; resistance is big; intensity is low; not anti-ly wash away and wear and tear, in the higher also fracture easily of occasion ferrule boot of flow velocity, so serviceable life is short; not only increase and purchase to industrial and mining enterprises; the parking replacement cost, and increase a lot of labor capacity to maintenance mans.Each professional person to the thermoelectricity of band protective casing occasionally the high-strength abrasion-proof Journal of Sex Research design of the protective casing of thermal resistance never stop; but almost all be to be confined to Material Selection with to the research of special material prescription; and the material material of selecting for use is special more; its manufacturing cost is just high more; although produced hot thermocouple/resistance protection sleeve pipe has certain wear-resisting effect; but effect is undesirable; after protective casing was installed on pipeline, its junction and ferrule boot wearing and tearing of meeting stream side, leading section and protective casing and tube wall were the most serious.
It mainly is that sleeve pipe in use washes away because of higher temperature, stronger burn into medium that protective casing damages; the damage that causes mainly contains fracture, wear and leakage; the external force that causes damage mainly is frictional resistance and the pressure drag of medium to sleeve pipe; according to newton's third law of motion; stream the power opposite sign but equal magnitude that object acts on object for the resistance and the fluid of fluid; so frictional resistance and pressure drag that research causes sleeve pipe to damage can equivalence be streamed the resistance of object for fluid for research.
Frictional resistance derives from making a concerted effort of object plane viscous shearing stress, and pressure drag is making a concerted effort at the component of flow direction of object plane upward pressure.Be in laminar condition when flowing in general, flow and do not separate as yet, then drag overall mainly shows as frictional resistance, this power is the main power that causes sleeve pipe to damage, and begins to separate when flowing, but separates less, and flow and still be in laminar condition, at this moment frictional resistance and pressure drag have equal importance, and along with the aggravation of separation flow, pressure drag is also more and more occupied an leading position.
According to http://www.cngspw.com/vbooks/ShowSubject.asp? the SubjectID=3979 record, Tsing-Hua University teaching software storehouse " engineering fluid mechanics " chapter 8 the 8th joint " peripheral flow phenomenon and resistance " subordinate list " resistance coefficients of some thing types ", the resistance coefficient trial value result of bluff is: the resistance coefficient Cd of cylinder and semicanal binary thing type is 1.2, the resistance coefficient Cd of square column is 2.0, and the resistance coefficient Cd of ellipse post is 0.2～0.46.In view of the above, the circular casing resistance coefficient is higher, and it is lower to approach the resistance coefficient of fairshaped ellipse post.
Put down in writing according to http://em.sjtu.edu.cn/fluid/neirong/c/C_473.htm, in resistance coefficient one joint of Chinese Ministry of Education's new century network Course Construction engineering " fluid mechanics " C4.7.3 difformity object of engineering mechanics system of Shanghai Communications University development, figure C4.7.7 " result of the drag measurement that water droplet shape streamlined body is done in wind tunnel experiment " is described: the thickness of representing water droplet shape streamlined body with t, l represents chord length, and resistance coefficient is C
d, investigated frictional resistance, pressure drag and drag overall Changing Pattern respectively, though pressure drag reduces when t/l reduces, it is faster that frictional resistance rises, frictional resistance reduces when t/l increases, but pressure drag sharply rises, and both all make the drag overall increase; Water droplet shape fairing is compared with the right cylinder of same thickness, and the former minimum drag coefficient has only 1/5 of latter's minimum drag coefficient; During the ratio t/l=0.25 of the thickness t of streamlined body and chord length l, fairing in fluid frictional resistance, pressure drag make a concerted effort minimum.
On this theoretical foundation, the thermoelectricity that can design the high-intensity band protective casing of novel low-resistance is thermal resistance occasionally.
Summary of the invention
Technical problem to be solved in the utility model provides occasionally thermal resistance of a kind of lower resistance high-strength abrasion-proof thermoelectricity with protective casing; thereby can realize thermoelectricity occasionally thermal resistance in ducted resistance minimum; friction force is also minimum, the technique effect of corresponding prolongation in serviceable life.
For the purpose that realizes solving the problems of the technologies described above, the utility model has adopted following technical scheme:
The lower resistance high-strength abrasion-proof thermoelectricity of band protective casing of the present utility model is thermal resistance occasionally; comprise thermoelectricity occasionally thermal resistance alloy, terminal box supporting sleeve, terminal box; be characterised in that: described thermoelectricity occasionally thermal resistance protective casing is streamlined wear-resistant sleeve; the cross section that streamlined wear-resistant sleeve inserts equipment or pipe interior part is streamlined, water droplet shape or approximate streamlined, water droplet shape; preceding circle metacone has in the middle of the streamlined wear-resistant sleeve and holds the thermoelectric occasionally cavity of thermal resistance alloy.
The lower resistance high-strength abrasion-proof thermoelectricity of band protective casing of the present utility model is thermal resistance occasionally, and optimized technical scheme can be: described streamlined wear-resistant sleeve is axial isometrical shape or and the thin slightly taper of tapering of the thick leading section of root.
The lower resistance high-strength abrasion-proof thermoelectricity of band protective casing of the present utility model is thermal resistance occasionally, and described wear-resistant sleeve leading section adopts streamlined or semicircle ball-type, flush.
The lower resistance high-strength abrasion-proof thermoelectricity of band protective casing of the present utility model is thermal resistance occasionally; the process web member that can also comprise a band installation direction indicator; the installation direction indicator can be protrusion, groove, delineation line, arrow on the process web member etc., and the installation direction indicator is attached on the process web member.
The lower resistance high-strength abrasion-proof thermoelectricity of band protective casing of the present utility model is thermal resistance occasionally; during the equipment of being installed on/pipe interior; streamlined wear-resistant sleeve perpendicular to the MEDIA FLOW of inside to; meet GB50093-2002 " instrument and meter for automation engineering construction and acceptance specification " 4.2.1 requirement; casing axis and conduit axis intersect vertically; front circle one side is in the MEDIA FLOW upstream in face of the installation of media flow direction, and the sharper side in back is in the MEDIA FLOW downstream.
The lower resistance high-strength abrasion-proof thermoelectricity of band protective casing of the present utility model is thermal resistance occasionally; can adopt with existing conventional thermoelectric occasionally thermal resistance protective casing uses same process web member to install: use the retaining thread formula; the movable whorl formula; the mounting flange formula; the loose flange formula; the process web member of patterns such as cap nut formula; as Fig. 4; 5; just on corresponding process web member the installation direction indicator is set in addition and installs according to correct direction with the sleeve pipe that indicates airflow design, the installation direction indicator can be a protrusion on the process web member; one groove; delineate patterns such as line together.
The lower resistance high-strength abrasion-proof thermoelectricity of band protective casing of the present utility model is thermal resistance occasionally; the flange sleeve pipe that can also comprise a band installation direction indicator; the flange sleeve pipe of band installation direction indicator is the circular flat limit of outwards vertically routing up a certain diameter at the protective casing opening part, and the round side in corresponding protective casing front has a protrusion to be used to indicate the installation direction of protective casing on the flat limit of circle.
The lower resistance high-strength abrasion-proof thermoelectricity of band protective casing of the present utility model is thermal resistance occasionally, and optimized technical scheme can be: the ratio of the thickness t of described streamlined wear-resistant sleeve and chord length l is t/l=0.20～0.30.The thickness t of the further preferred streamlined wear-resistant sleeve of technique scheme and the ratio of chord length l are t/l=0.25.Described thickness is the width in the wear-resistant sleeve cross section of streamlined, water droplet shape or approximate streamlined, water droplet shape, and described chord length is the length in the wear-resistant sleeve cross section of streamlined, water droplet shape or approximate streamlined, water droplet shape.
The lower resistance high-strength abrasion-proof thermoelectricity of band protective casing of the present utility model is thermal resistance occasionally; optimized technical scheme can also be: the ratio t/l of the thickness t of described streamlined wear-resistant sleeve and chord length l; satisfy to reduce frictional resistance, reduce pressure drag, when reducing the different needs of drag overall, t/l can get respectively greater than 0.25, less than 0.25, equal 0.25 value.Above-mentioned conclusion can be supported according to the resistance coefficient one joint figure C4.7.7 " result of the drag measurement that water droplet shape streamlined body is done in wind tunnel experiment " described " the drag measurement curve that water droplet shape streamlined body is done in wind tunnel experiment " of Chinese Ministry of Education's new century network Course Construction engineering " fluid mechanics " C4.7.3 difformity object of Shanghai Communications University engineering mechanics system development.
The lower resistance high-strength abrasion-proof thermoelectricity of band protective casing of the present utility model is thermal resistance occasionally, and optimized technical scheme can also be: it can be various metal materials or nonmetallic materials that described streamlined wear-resistant sleeve is made material.
The lower resistance high-strength abrasion-proof thermoelectricity of band protective casing of the present utility model is thermal resistance occasionally, and its terminal box, terminal box supporting sleeve can be and have thermoelectric occasionally same terminal box and the terminal box supporting sleeve of thermal resistance now.
The lower resistance high-strength abrasion-proof thermoelectricity of band protective casing of the present utility model is thermal resistance occasionally; if brand-new the installation; recommend to use the flange sleeve pipe of band installation direction indicator, this mounting means is convenient to regulate direction because of sleeve pipe can rotate freely before fastening correct with the installation direction of the sleeve pipe of guaranteeing airflow design.If be used to change traditional circular casing of usefulness, then can select accordingly thread connecting mode or flange connection with the installation direction indicator.
These technical schemes comprise that various optimized technical scheme also can make up mutually or combination, thereby reach better technique effect.For example, different installation direction indicators can with the streamlined wear-resistant sleeve combination of different external forms, the ratio selection scheme of the thickness t of streamlined wear-resistant sleeve and chord length l, adopt different installation direction indicators, these technical schemes of streamlined wear-resistant sleeve combination respectively of different external forms, the technical scheme of these combinations all is the technical scheme part of this patent.
By adopting technique scheme, the utility model lower resistance high-strength abrasion-proof thermoelectricity is the thermal resistance sleeve pipe occasionally, and sleeve pipe is in ducted resistance minimum, and friction force is also minimum, corresponding prolongation in serviceable life.
Description of drawings
Fig. 1 is the axial isometrical type synoptic diagram of protective casing of the present utility model.
Fig. 2 is the tapered synoptic diagram of protective casing of the present utility model.
Fig. 3 is the streamlined wear-resistant sleeve sectional view of protective casing of the present utility model, and l is a chord length among the figure, and t is a thickness.
Fig. 4 is the synoptic diagram of lower resistance high-strength abrasion-proof thermoelectricity of the present utility model when occasionally the process web member of the band installation direction indicator of thermal resistance is flange.
Fig. 5 is the lower resistance high-strength abrasion-proof thermoelectricity of a band protective casing of the present utility model synoptic diagram when occasionally the process web member of the band installation direction indicator of thermal resistance is for the threaded connector of band installation direction indicator.Figure
4, the installation direction indicator shown in 5 is a protrusion.
Fig. 6 is the lower resistance high-strength abrasion-proof thermoelectricity of a band protective casing of the present utility model flange sleeve pipe synoptic diagram when occasionally thermal resistance includes the flange sleeve pipe of band installation direction indicator.
Fig. 7 is the lower resistance high-strength abrasion-proof thermoelectricity of a band protective casing of the present utility model flange sleeve pipe top view when occasionally thermal resistance includes the flange sleeve pipe of band installation direction indicator, and there is the cavity cross section of holding thermoelectric occasionally thermal resistance alloy circular flange sleeve pipe the inside for circular among the figure.
The lower resistance high-strength abrasion-proof thermoelectricity of Fig. 8 band protective casing of the present utility model is when occasionally thermal resistance includes the flange sleeve pipe of band installation direction indicator, the installation diagram of flange sleeve pipe on pipeline of band installation direction indicator.
Fig. 1 in Fig. 8,1, streamlined wear-resistant sleeve, 2, streamlined wear-resistant sleeve leading section, 3, installation direction indicator, 4, rack sleeve mounting flange, 5, the sleeve pipe flange, 6, flange, 7, gasket seal, 8, bolt and nut pad, 9, pipeline and installation take over, 10, terminal box installs supporting sleeve, 11, terminal box, 12, process web member threaded connector.
Fig. 9 is the figure C4.7.7 " result of the drag measurement that water droplet shape streamlined body is done " of the described Shanghai Communications University of background technology " fluid mechanics " in wind tunnel experiment.
Embodiment
A kind of lower resistance high-strength abrasion-proof thermoelectricity occasionally its band installation direction indicator of thermal resistance sleeve pipe the installation diagram of flange sleeve pipe on pipeline as shown in Figure 8, on the pipeline 9 that needs thermometric, draw a short tube, welding flange 6 on short tube, streamlined wear-resistant sleeve 1 inserts pipeline by flange 6, the sleeve pipe flange 5 of band installation direction indicator 3 is placed on the flange 6, between sleeve pipe flange 5 and the flange 6 gasket seal 7 is arranged.Terminal box 11 is installed supporting sleeve 10 by terminal box and is installed on the rack sleeve mounting flange 4, make rack sleeve mounting flange 4 and flange 6 fastening clampings by bolt and nut pad 8, before the fastening clamping its installation direction indicator 3 of revoling tube flange 5 formulas point to MEDIA FLOW in pipelines 9 to opposite direction.
The lower resistance high-strength abrasion-proof thermoelectricity of this design is the thermal resistance sleeve pipe occasionally, the flange sleeve pipe of its band installation direction indicator is installed as shown in the figure, because flange sleeve pipe 5 is movable with respect to flange and pipeline, the anglec of rotation arbitrarily, so before by flange, pad, bolted, earlier sleeve pipe is rotated to correct direction, screw bolt again, so install simple according to installation direction indicator 3 indicated directions.It all is standard component that used flange, pad and bolt are installed, so installation cost is cheap.
Claims (9)
1. lower resistance high-strength abrasion-proof thermopair with protective casing; comprise thermocouple metal, terminal box supporting sleeve, terminal box; be characterised in that: described thermocouple protective casing is streamlined wear-resistant sleeve (1); the cross section of streamlined wear-resistant sleeve (1) insertion equipment or pipe interior part is streamlined, water droplet shape or approximate streamlined, water droplet shape; preceding circle metacone has the cavity that holds thermocouple metal in the middle of the streamlined wear-resistant sleeve (1).
2. according to the lower resistance high-strength abrasion-proof thermopair of the described band protective casing of claim 1, it is characterized in that: described streamlined wear-resistant sleeve (1) for axial isometrical shape or and root than the thin slightly taper of tapering of thick end.
3. according to the lower resistance high-strength abrasion-proof thermopair of the described band protective casing of claim 1, it is characterized in that: described wear-resistant sleeve leading section (2) adopts streamlined or semicircle ball-type, flush.
4. according to the lower resistance high-strength abrasion-proof thermopair of the described band protective casing of claim 1, it is characterized in that: described thermopair comprises the process web member of a band installation direction indicator (3), and installation direction indicator (3) is attached on the process web member.
5. according to the lower resistance high-strength abrasion-proof thermopair of the described band protective casing of claim 4, it is characterized in that: described installation direction indicator (3) is protrusion, groove, delineation line or the arrow on the process web member.
6. according to the lower resistance high-strength abrasion-proof thermopair of the described band protective casing of claim 1; it is characterized in that: described thermopair comprises the flange sleeve pipe (5) of a band installation direction indicator (3); the flange sleeve pipe of band installation direction indicator (3) is the circular flat limit of outwards vertically routing up a certain diameter at the protective casing opening part, and the round side in corresponding protective casing front has a protrusion to be used to indicate the installation direction of protective casing on the flat limit of circle.
7. according to the lower resistance high-strength abrasion-proof thermopair of the described band protective casing of claim 1, it is characterized in that: the thickness t of described streamlined wear-resistant sleeve (1) and the ratio of chord length l are t/l=0.20～0.30.
8. according to the lower resistance high-strength abrasion-proof thermopair of the described band protective casing of claim 7, it is characterized in that: the thickness t of described streamlined wear-resistant sleeve (1) and the ratio of chord length l are t/l=0.25.
9. according to the lower resistance high-strength abrasion-proof thermopair of the described band protective casing of claim 1; it is characterized in that: the ratio t/l of the thickness t of described streamlined wear-resistant sleeve (1) and chord length l; satisfy to reduce frictional resistance, reduce pressure drag, when reducing the different needs of drag overall, t/l gets respectively greater than 0.25, less than 0.25, equal 0.25 value.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202684794U CN201955158U (en) | 2010-07-23 | 2010-07-23 | Low-resistance high-strength and abrasion-proof thermocouple with protection sleeve |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010202684794U CN201955158U (en) | 2010-07-23 | 2010-07-23 | Low-resistance high-strength and abrasion-proof thermocouple with protection sleeve |
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| CN201955158U true CN201955158U (en) | 2011-08-31 |
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| CN2010202684794U Expired - Fee Related CN201955158U (en) | 2010-07-23 | 2010-07-23 | Low-resistance high-strength and abrasion-proof thermocouple with protection sleeve |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105300536A (en) * | 2015-10-23 | 2016-02-03 | 安徽蓝德仪表有限公司 | Erosion-resistant and break-resistant thermocouple |
| CN106092357A (en) * | 2016-07-21 | 2016-11-09 | 安徽蓝润自动化仪表有限公司 | A kind of Multi-section temperature-measuring thermocouple |
| CN107560744A (en) * | 2017-09-26 | 2018-01-09 | 无锡英罗唯森科技有限公司 | Thermometer bushing device |
| CN111121989A (en) * | 2019-12-05 | 2020-05-08 | 合肥通用机械研究院有限公司 | Fluid detection device |
-
2010
- 2010-07-23 CN CN2010202684794U patent/CN201955158U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105300536A (en) * | 2015-10-23 | 2016-02-03 | 安徽蓝德仪表有限公司 | Erosion-resistant and break-resistant thermocouple |
| CN105300536B (en) * | 2015-10-23 | 2018-11-27 | 安徽蓝德自动化科技有限公司 | A kind of anti-fracture thermocouple of Anti-erosion |
| CN106092357A (en) * | 2016-07-21 | 2016-11-09 | 安徽蓝润自动化仪表有限公司 | A kind of Multi-section temperature-measuring thermocouple |
| CN107560744A (en) * | 2017-09-26 | 2018-01-09 | 无锡英罗唯森科技有限公司 | Thermometer bushing device |
| CN111121989A (en) * | 2019-12-05 | 2020-05-08 | 合肥通用机械研究院有限公司 | Fluid detection device |
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Granted publication date: 20110831 Termination date: 20120723 |