CN201575871U - COT thermocouple for tapered cracking furnace - Google Patents
COT thermocouple for tapered cracking furnace Download PDFInfo
- Publication number
- CN201575871U CN201575871U CN2010200496911U CN201020049691U CN201575871U CN 201575871 U CN201575871 U CN 201575871U CN 2010200496911 U CN2010200496911 U CN 2010200496911U CN 201020049691 U CN201020049691 U CN 201020049691U CN 201575871 U CN201575871 U CN 201575871U
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- thermopair
- outer tube
- taper
- wear
- small casing
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Abstract
A COT thermocouple for a tapered cracking furnace comprises an abrasion-resistant head, a small sleeve, a thermocouple core, an outer sleeve and a flange, wherein the outer sleeve is tapered, the diameter of the end of the outer sleeve connected with the flange is large, and the diameter of the end thereof connected with the abrasion-resistant head is small; the lower end part of the outer sleeve can adopt a straight or tapered shape; four screw holes are additionally formed on the flange; the abrasion-resistant head is positioned in a lateral position of the outer sleeve, the top of the abrasion-resistant head adopts a prismatic structure, abrasion-resistant hard alloy is piled up through welding on the prismatic surface, and the prismatic surface is basically parallel to the medium flow direction. The thermocouple can be used for measuring the temperature at an outlet of an ethylene cracking furnace.
Description
Technical field
The utility model relates to a kind of thermopair, especially a kind of thermopair that is used to measure cracking of ethylene heater outlet temperature (COT).
Background technology
The temperature accuracy of cracking of ethylene heater outlet temperature (COT) directly has influence on the important indicators such as quality, yield of ethene, production capacity and energy consumption that pyrolysis furnace moves, so the control of the temperature of COT is most important.
On-the-spot operating mode, the pyrolysis furnace outlet temperature is 850 ℃ during production run, liquid and solid particle are arranged in the medium, and corrosivity is strong, easily coking, flow velocity are fast, and therefore the thermopair that uses should have following feature: be quick on the draw, high temperature resistant, corrosion-resistant, wear-resistant, quick detachable.
Pyrolysis furnace COT thermopair mainly comprises wear-resisting head, small casing, thermopair core, outer tube (big sleeve pipe) and flange, the outer tube of traditional COT thermopair all is straight molded cannula, when equipment uses for a long time, between outer tube and boss, can generate the thick coke of one deck.When equipment was stopped transport, temperature reduced, and boss is because expand with heat and contract with cold, and internal diameter diminishes during higher temperature, caused the coke hardness between outer tube and the boss to become higher because of extruding.When needs were changed thermopair, sleeve pipe was difficult to extract, and safeguarded that the replacing work difficulty is big, even sometimes can only take to destroy modes such as outer tube or cutting boss and could change thermopair and sleeve pipe.
Summary of the invention
Technical problem to be solved in the utility model provides a kind of pyrolysis furnace COT thermopair of convenient disassembly, to overcome the problem that existing cracking of ethylene heater outlet temperature (COT) uses thermopair to exist.
For solving the problems of the technologies described above, the technical solution of the utility model is: a kind of taper pyrolysis furnace COT thermopair, comprise wear-resisting head, small casing, thermopair core, outer tube and flange, described outer tube is a cone-shaped, its end diameter that is connected with flange is big, and an end diameter that is connected with wear-resisting head is little.The end portion of described outer tube can be straight shape or taper according to the use occasion requirement.
One of further technical scheme of the utility model is: have additional 4 screws on the described flange.When because coking, when flange and sleeve pipe can not be extracted easily, 4 screws setting up on the available flange were tightened with 4 pieces of bolts and to be withstood vessel flange, and sleeve pipe is extracted.
Two of the further technical scheme of the utility model is: described wear-resisting head is positioned at outer tube one side position, and the wear-resisting head top is a prismatic structure, its prismatic surface build-up welding wearable hard alloy, and prismatic face and MEDIA FLOW are to substantially parallel.
Three of the further technical scheme of the utility model is: described small casing stretches out big sleeve pipe, big relatively sleeve pipe is eccentric to be provided with and to be positioned at the wear-resisting head back, the point for measuring temperature of described thermopair core is positioned at the end of small casing, is less than or equal to 0.2 millimeter with the gap of small casing end face.
Four of the further technical scheme of the utility model is: described thermopair core inserts small casing by guide pipe, filling ceramic fiber between guide pipe and outer tube.
The beneficial effects of the utility model are: 1, outer tube is taper, and when coking, sleeve pipe was easier when pyramidal structure was changed extracts; 2, flange has been Duoed 4 threaded holes than standard specification, and when coking, when flange and outer tube can not be extracted easily, 4 threaded holes setting up on the available flange were tightened with 4 pieces of bolts and to be withstood vessel flange, and outer tube is extracted easily; 3, the wear-resisting head top is a prismatic structure, wear-resisting head prismatic surface build-up welding wearable hard alloy, and prismatic face and MEDIA FLOW can reduce the wearing and tearing of medium to wear-resisting head to becoming parallel direction substantially, improve wear-resisting head serviceable life; 4, small casing stretches out outer tube, relatively outer tube is eccentric is provided with and is positioned at the wear-resisting head back, the point for measuring temperature of thermopair core is positioned at the end of small casing, be less than or equal to 0.2 millimeter with the gap of small casing end face, can improve thermopair reaction velocity and measuring accuracy, can be unlikely to again to be washed into, cause damaging by medium; 5, filling ceramic fiber between guide pipe and outer tube can improve the heat-insulating property of thermopair.
The utility model is described in further detail below in conjunction with the drawings and the specific embodiments.
Description of drawings
Fig. 1 is the one-piece construction synoptic diagram of a kind of embodiment of the utility model;
Fig. 2 is the A-A view of Fig. 1;
Fig. 3 is that the B of Fig. 1 is to view;
Fig. 4 is the 3-D view of wear-resisting head;
Fig. 5 is this product installation diagram.
Drawing explanation: 1. wear-resisting head, 2. small casing, 3. thermopair core, 4. ceramic fiber, 5. guide pipe, 6. outer tube, 7. flange, 8. flange-interface is 9. gone up protection tube, 10. terminal box, 11. screws.
Embodiment
As Fig. 1, Fig. 2, Fig. 3, embodiment shown in Figure 4, comprise wear-resisting head 1, small casing 2, thermopair core 3, ceramic fiber 4, guide pipe 5, outer tube 6, flange 7, flange-interface 8, go up protection tube 9 and terminal box 10.Outer tube 6 is the cone-shaped one-piece construction, and an end diameter that is connected with flange 7 is big, and an end diameter that is connected with wear-resisting head is little, and pipe end section is straight type or taper, the pulling force when its intensity can satisfy dismounting after the coking; Have additional 4 screws 11 on the flange 7; Wear-resisting head 1 is positioned at outer tube 6 one side positions and with small casing 2 melting welding, with after outer tube 6 usefulness are threaded again melting welding fix, make being connected of wear-resisting head and outer tube more firm, wear-resisting head 1 top is a prismatic structure, wear-resisting head prismatic surface build-up welding wearable hard alloy also grinds, and makes smooth surface, reduces the friction of medium and wear-resisting head during use, reduce wearing and tearing, the prismatic face of wear-resisting head 1 and MEDIA FLOW are to becoming parallel direction substantially; Thermopair core 3 inserts small casing 2 by guide pipe 5, and small casing 2 stretches out outer tube 6, relatively the outer tube 6 eccentric backs that are provided with and are positioned at wear-resisting head 1; The point for measuring temperature of described thermopair core 3 is positioned at the end of small casing 2, is less than or equal to 0.2 millimeter with the gap of small casing end face, fills up ceramic fiber 4 between guide pipe 5 and the outer tube 6; Flange-interface 8 and flange 7 melting welding; Thermopair core 3, last protection tube 9 and terminal box 10 are screwed into flange-interface 8 places for one, and flange-interface 8 is the NPT taper pipe thread, good seal performance; The prismatic structure of wear-resisting head and eccentric the setting, direction shown in the arrow on the flange face is consistent with on-the-spot flow direction when mounted, can't install with other directions.
Claims (10)
1. taper pyrolysis furnace COT thermopair, comprise wear-resisting head (1), small casing (2), thermopair core (3), outer tube (6) and flange (7), it is characterized in that: described outer tube (6) is a cone-shaped, and its end diameter that is connected with flange is big, and an end diameter that is connected with wear-resisting head is little.
2. taper pyrolysis furnace COT thermopair according to claim 1, it is characterized in that: the end portion of described outer tube (6) is straight shape or taper.
3. taper pyrolysis furnace COT thermopair according to claim 1 and 2 is characterized in that: have additional 4 screws (11) on the described flange (7).
4. taper pyrolysis furnace COT thermopair according to claim 1 and 2, it is characterized in that: described wear-resisting head (1) is positioned at outer tube (6) one side positions, wear-resisting head (1) top is a prismatic structure, its prismatic surface build-up welding wearable hard alloy, and prismatic face and MEDIA FLOW are to substantially parallel.
5. taper pyrolysis furnace COT thermopair according to claim 3, it is characterized in that: described wear-resisting head (1) is positioned at outer tube (6) one side positions, wear-resisting head (1) top is a prismatic structure, its prismatic surface build-up welding wearable hard alloy, and prismatic face and MEDIA FLOW are to substantially parallel.
6. taper pyrolysis furnace COT thermopair according to claim 4, it is characterized in that: described small casing (2) stretches out outer tube (6), outer tube (6) off-centre is provided with and is positioned at the back of wear-resisting head (1) relatively, the point for measuring temperature of described thermopair core (3) is positioned at the end of small casing (2), is less than or equal to 0.2 millimeter with the gap of small casing (2) end face.
7. taper pyrolysis furnace COT thermopair according to claim 5, it is characterized in that: described small casing (2) stretches out outer tube (6), outer tube (6) off-centre is provided with and is positioned at the back of wear-resisting head (1) relatively, the point for measuring temperature of described thermopair core (3) is positioned at the end of small casing (2), is less than or equal to 0.2 millimeter with the gap of small casing (2) end face.
8. taper pyrolysis furnace COT thermopair according to claim 1 and 2 is characterized in that: described thermopair core (3) inserts small casing (2), filling ceramic fiber (4) between guide pipe (5) and the outer tube (6) by guide pipe (5).
9. taper pyrolysis furnace COT thermopair according to claim 3 is characterized in that: described thermopair core (3) inserts small casing (2), filling ceramic fiber (4) between guide pipe (5) and the outer tube (6) by guide pipe (5).
10. taper pyrolysis furnace COT thermopair according to claim 7 is characterized in that: described thermopair core (3) inserts small casing (2), filling ceramic fiber (4) between guide pipe (5) and the outer tube (6) by guide pipe (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010200496911U CN201575871U (en) | 2010-01-08 | 2010-01-08 | COT thermocouple for tapered cracking furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010200496911U CN201575871U (en) | 2010-01-08 | 2010-01-08 | COT thermocouple for tapered cracking furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201575871U true CN201575871U (en) | 2010-09-08 |
Family
ID=42695747
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010200496911U Ceased CN201575871U (en) | 2010-01-08 | 2010-01-08 | COT thermocouple for tapered cracking furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201575871U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102507032A (en) * | 2011-11-04 | 2012-06-20 | 吴方立 | COT thermocouple for cracking furnace |
| CN112629693A (en) * | 2020-12-10 | 2021-04-09 | 淄博益源工程技术有限公司 | COT surface thermocouple |
-
2010
- 2010-01-08 CN CN2010200496911U patent/CN201575871U/en not_active Ceased
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102507032A (en) * | 2011-11-04 | 2012-06-20 | 吴方立 | COT thermocouple for cracking furnace |
| CN112629693A (en) * | 2020-12-10 | 2021-04-09 | 淄博益源工程技术有限公司 | COT surface thermocouple |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C35 | Partial or whole invalidation of patent or utility model | ||
| IW01 | Full invalidation of patent right |
Decision date of declaring invalidation: 20111220 Decision number of declaring invalidation: 17734 Granted publication date: 20100908 |