CN201653575U - Dedicated thermocouple for furnace bottom - Google Patents
Dedicated thermocouple for furnace bottom Download PDFInfo
- Publication number
- CN201653575U CN201653575U CN2010201553127U CN201020155312U CN201653575U CN 201653575 U CN201653575 U CN 201653575U CN 2010201553127 U CN2010201553127 U CN 2010201553127U CN 201020155312 U CN201020155312 U CN 201020155312U CN 201653575 U CN201653575 U CN 201653575U
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- China
- Prior art keywords
- thermocouple
- furnace bottom
- terminal box
- special electric
- electric thermo
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Abstract
The utility model discloses a dedicated thermocouple for a furnace bottom, which comprises a junction box, an armored thermocouple passing through the junction box, a protective sleeve sleeved outside the armored thermocouple, a sleeve sleeved in the position close to the front end of the armored thermocouple, and an alloy wear-resistant coating wrapped on the surface of the bushing. The utility model improves the pressure resistance and the service life of the protective sleeve and ensures uniform thickness of the end of the sleeve, so as to greatly increase the thermal response speed of temperature measurement, guarantee the temperature measurement accuracy and prolong the service life of the thermocouple. Therefore, the service life of the thermocouple is prolonged; the frequency of replacement and repair is greatly reduced; the efficiency of the circulating fluidized bed (CFB) boiler is improved; and the utility model has significance in environmental protection.
Description
Technical field
The utility model relates to area of thermocouples, especially a kind of furnace bottom special electric thermo-couple that is used for the CFB furnace bottom.
Background technology
Thermopair is the detecting element in the automation process control system, is a kind of Automation Control Instruments.Thermopair background principle is " seat Bake effect (Seebeck effect) ", be called thermoelectric effect again, its phenomenon is when two kinds of heterogeneity metal endpoints are connected to form a closed loop, if between two-end-point temperature difference is arranged, then having electric current between the loop produces, the higher contact of temperature is called " hot junction (hot junction) " in the loop, and this point is placed in the thermometric place usually; Temperature is called cold junction than low side, i.e. the output terminal of thermopair, and its output signal is a direct current voltage, sees through the special parallel operation of A/D and converts digital signal to, and see through the software calculation, is transformed into actual temperature value.In industries such as petrochemical complex, metallurgy, electric power, very big to the demand of thermopair.Current, domestic special electric thermo-couple is mainly by import.The special electric thermo-couple of import often costs an arm and a leg, and delivery cycle is long, is not enough to satisfy the needs of home market.
In recent years, the requirement of China aspect environmental protection is also further strict, Combustion technology of circulating fluidized is as a novel combustion technology, have outstanding advantage at aspects such as energy savings, adjusting load, control pollution and fuel tolerances, in many fields such as power industry, waste incineration, cement industry, obtain increasingly extensive application.Yet because the special combustion system of Circulating Fluidized Bed Boiler, wear problem is the key factor that influences its long-term safety operation always.In service in Circulating Fluidized Bed Boiler contains the Solid Bed material of fuel, fuel ash, lime stone and reactant thereof, is in the closed circulation loop during the high temperature circulation of not stopping flows, and carries out efficient combustion and desulphurization reaction with 850 ℃～950 ℃ in stove; And contain SO in the coal-fired medium
2, SO
3, Na
2O, K
2Corrosive gass such as O.Owing to high temperature erosion seriously greatly reduces normal serviceable life of thermopair, so the problem in serviceable life of thermopair becomes urgent problem.
The utility model content
The purpose of this utility model provides a kind of furnace bottom special electric thermo-couple, can't satisfy the problem of Circulating Fluidized Bed Boiler needs serviceable life with the thermopair in the solution conventional art.
In order to achieve the above object, the technical scheme that the utility model adopted is:
The furnace bottom special electric thermo-couple; comprise the terminal box that has electric interfaces; described terminal box sidewall is provided with the mouth of pipe with the terminal box internal communication; there is armoured thermocouple to pass by the mouth of pipe from described terminal box inside; it is characterized in that: also include protective casing and sleeve pipe; described protective casing is enclosed within the outside of the armoured thermocouple center section that passes terminal box, and described casing pipe sleeve is in the outside of the front portion of the armoured thermocouple that passes terminal box, and described sleeve surface is coated with the alloy wear-resisting layer.
Described furnace bottom special electric thermo-couple is characterized in that: described armoured thermocouple includes thermocouple wire, is enclosed within the protection tube of thermocouple wire outside, the rigid insulation layer between thermocouple wire and protection tube, and described rigid insulation layer material is a metal oxide.
Described furnace bottom special electric thermo-couple is characterized in that: described metal oxide is a magnesium oxide.
Described furnace bottom special electric thermo-couple is characterized in that: described protective casing is that the stainless steel of 310SS is made by model.
Described furnace bottom special electric thermo-couple is characterized in that: described sleeve pipe is that the high-temperature alloy steel of GH39W is made by model, and the material of the alloy wear-resisting layer of jacket exterior is a nickel cobalt antifriction alloy.
Described furnace bottom special electric thermo-couple is characterized in that: the two ends of described protective casing have ferrule-type compression joint respectively, and described sleeve pipe one end has ferrule-type compression joint.
The utility model improves traditional thermopair.Temperature element (TE) is the K calibration; single; thermopair is an armoured thermocouple; thermocouple wire and the insulation of its protection tube; be non-body contact formula, the insulating material in the armoured thermocouple is a hard cladding metal oxide (MgO), and is outside with stainless protective casing protection at armoured thermocouple; adopt the hot jacket method, and melt-sealed.Process is connected to the cutting ferrule screw and connects.Sleeve pipe adopts screw connected whole drill sleeve, adopts dark blind hole process technology, and the sleeve pipe material is GH39W, and the material of outer wear-resistant part is a nickel cobalt antifriction alloy.
The utility model advantage is:
Improved the working pressure and the serviceable life of protection tube, the end wall thickness is even, need not weld again; the material grains that does not promptly exist welding stress the to produce big problem that rises; make outer tube have high and physical strength and corrosion stability again, the thermal response speed of thermometric is improved greatly, guaranteed the precision of thermometric.And the used GH39W of sleeve pipe is a high-temperature alloy steel, and it has extraordinary high-temperature stability.Nickel cobalt antifriction alloy is done the antiwear characteristic that wear-resisting part has improved thermopair greatly, makes it can adapt to the working environment of CFB furnace bottom.Thereby prolonged the serviceable life of thermopair.The prolongation in thermopair serviceable life just makes replacing, and the maintenance number of times significantly reduces, and the efficient of CFB just is improved accordingly, and environmental protection is significant.
Description of drawings
Fig. 1 is the utility model structural representation.
Embodiment
As shown in Figure 1.The furnace bottom special electric thermo-couple; include terminal box 1; the armoured thermocouple 2 that non-body contact formula is arranged in the terminal box 1; terminal box 1 sidewall is provided with the mouth of pipe 3 with terminal box 1 internal communication; screwed togather sealing nut on the mouth of pipe 3, armoured thermocouple 2 passes the mouth of pipe 3 and stretches out terminal box 1, also is provided with electric interfaces 4 on the terminal box 1; also include the protective casing 6 that two ends have ferrule-type compression joint 5, protective casing 6 is that the stainless steel of 310SS is made by model.Protective casing 6 is enclosed within the outside that armoured thermocouple 2 passes the center section of terminal box 1; the fore-end that passes terminal box 1 near armoured thermocouple 2 also is with the sleeve pipe 7 that an end is connected with ferrule-type compression joint; sleeve pipe 7 is that the high-temperature alloy steel of GH39W is made by model; the front end that armoured thermocouple 2 passes terminal box 1 part is arranged in sleeve pipe 7, and the external packets of sleeve pipe 7 is covered with nickel cobalt antifriction alloy.
Claims (6)
1. furnace bottom special electric thermo-couple; comprise the terminal box that has electric interfaces; described terminal box sidewall is provided with the mouth of pipe with the terminal box internal communication; there is armoured thermocouple to pass by the mouth of pipe from described terminal box inside; it is characterized in that: also include protective casing and sleeve pipe; described protective casing is enclosed within the outside of the armoured thermocouple center section that passes terminal box, and described casing pipe sleeve is in the outside of the front portion of the armoured thermocouple that passes terminal box, and described sleeve surface is coated with the alloy wear-resisting layer.
2. furnace bottom special electric thermo-couple according to claim 1; it is characterized in that: described armoured thermocouple includes thermocouple wire, is enclosed within the protection tube of thermocouple wire outside, the rigid insulation layer between thermocouple wire and protection tube, and described rigid insulation layer material is a metal oxide.
3. furnace bottom special electric thermo-couple according to claim 2 is characterized in that: described metal oxide is a magnesium oxide.
4. furnace bottom special electric thermo-couple according to claim 1 is characterized in that: described protective casing is that the stainless steel of 310SS is made by model.
5. furnace bottom special electric thermo-couple according to claim 1 is characterized in that: described sleeve pipe is that the high-temperature alloy steel of GH39W is made by model, and the material of the alloy wear-resisting layer of jacket exterior is a nickel cobalt antifriction alloy.
6. furnace bottom special electric thermo-couple according to claim 1 is characterized in that: the two ends of described protective casing have ferrule-type compression joint respectively, and described sleeve pipe one end has ferrule-type compression joint.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201553127U CN201653575U (en) | 2010-04-07 | 2010-04-07 | Dedicated thermocouple for furnace bottom |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201553127U CN201653575U (en) | 2010-04-07 | 2010-04-07 | Dedicated thermocouple for furnace bottom |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201653575U true CN201653575U (en) | 2010-11-24 |
Family
ID=43118817
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201553127U Expired - Lifetime CN201653575U (en) | 2010-04-07 | 2010-04-07 | Dedicated thermocouple for furnace bottom |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201653575U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103033281A (en) * | 2012-12-24 | 2013-04-10 | 重庆材料研究院 | Platinum resistance temperature sensor with high intensity and fast response |
| CN108269634A (en) * | 2018-01-17 | 2018-07-10 | 上海核工程研究设计院有限公司 | A kind of used in nuclear power station includes the in-pile instrument sheath assembly of isometric arrangement detector |
-
2010
- 2010-04-07 CN CN2010201553127U patent/CN201653575U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103033281A (en) * | 2012-12-24 | 2013-04-10 | 重庆材料研究院 | Platinum resistance temperature sensor with high intensity and fast response |
| CN108269634A (en) * | 2018-01-17 | 2018-07-10 | 上海核工程研究设计院有限公司 | A kind of used in nuclear power station includes the in-pile instrument sheath assembly of isometric arrangement detector |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20101124 |
|
| CX01 | Expiry of patent term |