CN2688011Y - Silicon carbide radiating tube heater - Google Patents
Silicon carbide radiating tube heater Download PDFInfo
- Publication number
- CN2688011Y CN2688011Y CN 200420019746 CN200420019746U CN2688011Y CN 2688011 Y CN2688011 Y CN 2688011Y CN 200420019746 CN200420019746 CN 200420019746 CN 200420019746 U CN200420019746 U CN 200420019746U CN 2688011 Y CN2688011 Y CN 2688011Y
- Authority
- CN
- China
- Prior art keywords
- tube
- silicon carbide
- heating element
- carborundum
- heater
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model discloses a silicon carbide radiating tube heater, which comprises the tube shell of the silicon carbide radiating tube and a heating element. Wherein, the heating element is arranged in the tube shell of the silicon carbide radiating tube, the tube shell of the silicon carbide radiating tube can be made into a section or more sections, and each section is joined through high temperature adhesive. The utility model uses a silicon carbide tube to replace a heat-proof steel tube shell, and the silicon carbide tube is made into a plurality of sections to be connected. The fabrication cost can not be increased, and the fabrication technology is simple. The silicon carbide tube is used as the outer tube of the heater, the temperature of a heat chamber can reach from 1000 DEG C to 1100 DEG C, and the carbon potential is enhanced. The silicon carbide tube does not directly contact with a power connection to avoid the electric short circuit caused by the carbon deposition in a carburizing process. At the position of a led rod, the vacuum resistant mode is adopted, a water cooling system is added, and the requirement to the air tightness is ensured when the inner space of the furnace is pumped to form a vacuum environment.
Description
Technical field
It is the radiant tube heater of material with SiC that the utility model relates to a kind of, relates in particular to a kind of SiC radiant tube heater that is mainly used in the low-pressure carburization heat-treatment furnace.
Background technology
Vacuum carburization is also referred to as low-pressure carburization, owing to there is not the design of flame curtain, oil smoke and high hot pollution on the environment have thoroughly been solved, add that low-pressure carburization overcomes technical bottleneck gradually in recent years, make vacuum carburization quality and reproducibility obviously be better than traditional gas carburizing, its carburizing speed is the several times of traditional gas carburizing speed in addition, therefore low-pressure carburization is subjected to auto industry gradually, the attention of precision component industry and aircraft industry, and progressively replace traditional gas carburizing, even can be incorporated in the same factory building with machining equipment, improve and the configuration that has changed work flow.
Yet, vacuum carburization is when high temperature, its carburizing is very competent, when heating chamber added to 1000-1050 ℃ with temperature, its carburizing ability was the strongest, but the heating of traditional atmosphere furnace is as the heater outer tube with the high temperature heat-resisting steel, its temperature extremes only is 950 ℃, the way of Europe, the U.S., Japan is the way of prolonging with the heater of general vacuum furnace at present, and power supply is passed chamber walls directly to heating chamber through electric insulation, mainly adopts graphite or SiC directly to do outer hot body.In the preparation process of vacuum carburization, be to utilize vacuum pump system with the vacuum degree that is evacuated in the stove below the 1Kpa, inject carburizing gas then, utilize the mass flow control valve to make the vacuum draw amount maintain certain furnace pressure and carry out carburizing, in the time of in carburized material flows into stove, in stove, accumulate, cause electrode insulation impedance reduction to cause electric short circuit even and cause stove seriously to damage.
Summary of the invention
At the defective that prior art exists, it is the radiation heating tube that material is made with SiC that the purpose of this utility model is to provide a kind of, and this heating tube can bear high temperature and owing to directly do not contact power connection, can avoid the electric short circuit that carbon distribution causes in the carburizing process.
The utility model is achieved by the following technical solution: a kind of carborundum radiant tube heater, comprise carborundum tube and be located at the heating element and the heating element eduction rod of carborundum tube inside, the size of described carborundum radiant tube in heating furnace is generally long, be about 1000-2000mm, the possible flexural deformation of carborundum tube when oversize, therefore carborundum tube can be made one or more snippets, engages by the high temperature bonding mode between each section again.
Wherein said heating element can be in nickel chromium triangle heater strip, the siderochrome aluminium heater strip a kind of.
Wherein heating element eduction rod place adopts the vacuum-resistant sealing and installs the cooling device cooling additional.
The carborundum radiant tube heater that the utility model makes is mainly used in the low-pressure carburization heat-treatment furnace.
The utility model utilizes carborundum tube to replace the high temperature heat-resisting steel pipe, carborundum tube is made one or more snippets and then connect, cost of manufacture can not increase, manufacture craft is simple, utilize carborundum tube as the heater outer tube, can make the heating chamber temperature be heated to 1000-1050 ℃, improve the carburizing ability, again because carborundum tube does not directly contact power connection, can avoid the electric short circuit that carbon distribution causes in the carburizing process, solve the carborundum tube sealing problem owing to adopt the vacuum seal connection to install water cooling plant additional at the eduction rod place.
Description of drawings
Fig. 1 is the utility model structural representation.
Fig. 2 is applied to structural representation in the low-pressure carburization heat-treatment furnace for the utility model device.
The number in the figure explanation
1-heating furnace 2-valve orchid
3-vaccum seal ring 4-carborundum tube
5-cooling device 6-heating element
The joint of 7-eduction rod 8-carborundum tube
Door among the 9-carborundum tube heater 10-
11-Qianmen 12-oil quenching bath
13-workpiece 14-charging tray
Embodiment
How further specify utility model below in conjunction with accompanying drawing 1 and Fig. 2 realizes:
Carborundum tube heater 9 of the present utility model links to each other with heating furnace 1 by flange 2, the centre is provided with vaccum seal ring 3 and reaches sealing, carborundum tube heater 9 is by carborundum tube 4, heating element such as nickel chromium triangle heater strip 6, and heating element eduction rod 7 is formed, heating element eduction rod place adopts the vacuum-resistant sealing and installs cooling device 5 additional, carborundum tube 4 is made up of multistage carborundum, and carborundum tube has joint 8.
With the workpiece 13 (containing charging tray 14) of 1000KG therefrom door 10 enter heating furnace 1, from advancing the time that returns to 930 ℃ behind the stove is 1 hour 25 minutes, continue to be warming up to 1050 ℃ then, after the soaking 60 minutes, carry out vacuum carburization about 1 hour, the operation of quenching in oil quenching bath 12 after being cooled to 850 ℃ 11 is taken out workpiece 13 from the Qianmen after operation is finished.After All Jobs is finished, check that the situation of carborundum radiant tube is very good.
The above is the utility model preferred embodiment only, is not to be used for limiting the scope that the utility model is implemented.Be that all equalizations of being done according to the utility model scope change and modification, be the utility model and contain.
Claims (4)
1, a kind of carborundum radiant tube heater, comprise carborundum radiant tube and heating element and heating element eduction rod, it is characterized in that: heating element is located in the carborundum radiant tube shell, and described carborundum radiant tube shell can be made into one or more snippets, engages by high temperature adhesive between each section.
2, a kind of carborundum radiant tube heater according to claim 1 is characterized in that: heating element eduction rod place adopts the vacuum-resistant sealing and installs cooling device additional.
3, a kind of carborundum radiant tube heater according to claim 1 and 2 is characterized in that: described heating element is a kind of in nickel chromium triangle heater strip, the siderochrome aluminium heater strip.
4, according to claim 1,2 or 3 described a kind of carborundum radiant tube heaters, be used for the low-pressure carburization heat-treatment furnace.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420019746 CN2688011Y (en) | 2004-01-19 | 2004-01-19 | Silicon carbide radiating tube heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420019746 CN2688011Y (en) | 2004-01-19 | 2004-01-19 | Silicon carbide radiating tube heater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2688011Y true CN2688011Y (en) | 2005-03-23 |
Family
ID=34669184
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420019746 Expired - Fee Related CN2688011Y (en) | 2004-01-19 | 2004-01-19 | Silicon carbide radiating tube heater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2688011Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101505554B (en) * | 2009-02-13 | 2011-12-21 | 周存文 | Infrared radiation ceramic heater |
| CN108541096A (en) * | 2018-05-25 | 2018-09-14 | 山西丹源碳素股份有限公司 | A kind of monoblock type internal thermal tandem graphitization furnace tip electrode and preparation method thereof |
| CN109612270A (en) * | 2018-12-10 | 2019-04-12 | 天龙科技炉业(无锡)有限公司 | Annular furnace heating radiation tube seal structure |
-
2004
- 2004-01-19 CN CN 200420019746 patent/CN2688011Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101505554B (en) * | 2009-02-13 | 2011-12-21 | 周存文 | Infrared radiation ceramic heater |
| CN108541096A (en) * | 2018-05-25 | 2018-09-14 | 山西丹源碳素股份有限公司 | A kind of monoblock type internal thermal tandem graphitization furnace tip electrode and preparation method thereof |
| CN109612270A (en) * | 2018-12-10 | 2019-04-12 | 天龙科技炉业(无锡)有限公司 | Annular furnace heating radiation tube seal structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20050323 Termination date: 20100219 |