CN2760046Y - Energy-saving ion nitriding furnace - Google Patents
Energy-saving ion nitriding furnace Download PDFInfo
- Publication number
- CN2760046Y CN2760046Y CN 200420099336 CN200420099336U CN2760046Y CN 2760046 Y CN2760046 Y CN 2760046Y CN 200420099336 CN200420099336 CN 200420099336 CN 200420099336 U CN200420099336 U CN 200420099336U CN 2760046 Y CN2760046 Y CN 2760046Y
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- China
- Prior art keywords
- furnace
- energy
- protection screen
- heat protection
- thermal
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- Expired - Lifetime
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Abstract
The utility model relates to an energy-saving ion nitriding furnace, which comprises a furnace body and a furnace chassis, wherein the middle part of the furnace chassis is provided with a cathode supporting base, the furnace body is provided with a thermal insulating screen and an external cooling cover, and a thermal insulating and shielding cavity is arranged between the thermal insulating screen and the external cooling cover. The thermal insulating screen is a sealed thermal shielding and insulating layer made of double layer stainless steel, and the furnace chassis is provided with a furnace bottom thermal shielding screen. Nitriding gas enters a pipeline arranged on the outside of the thermal insulating screen, and enters a gas dispersing ring in the furnace body from the top part of the thermal insulating screen. The utility model has the advantages of reasonable structure, high quality of thermal insulation and thermal control, small consumption of recirculated cooling water, elimination of cold ammonia preheating and decomposing device, high work efficiency and energy saving, being an ideal energy-saving ion nitriding furnace.
Description
Technical field
The utility model relates to a kind of chemical heat treatment apparatus, specifically a kind of energy-saving ion nitrifying furnace.
Background technology
We know that ion nitriding furnace is a kind of important chemical heat treatment apparatus.It generally comprises body of heater, furnace hearth plate, and body of heater is provided with heat protection screen and outer cooling cowl again, is the heat insulating cavity between heat protection screen and the outer cooling cowl.Outer cooling cowl cools off by recirculated water.Nitriding gas enters pipeline and passes the heat insulating cavity and directly enter in the body of heater.Cathode bearing is housed in the middle of the furnace hearth plate, and the furnace hearth plate lower end is provided with a cover vacuum suction device.The ion nitriding furnace power supply adopts high voltage direct current, body of heater connects positive pole, cathode branch seated connection negative pole, workpiece is installed and is connected on the cathode bearing, after adding high voltage electric between the anode of cathode bearing and body of heater, when voltage reaches a certain numerical value, can puncture the rarefied gas ionized gas between negative electrode and the anode, produce the glow discharge heated parts, workpiece surface is carried out ion Plasma Nitriding Treatment.Rely on the double layer of metal thermoscreen to reduce thermograde in the stove in the existing ion nitriding furnace stove, because thermograde is big in the stove, the furnace outer wall temperature is up to 50 ℃, and the recirculated cooling water consumption is big, and cooling water outlet temperature is up to 65 ℃, and heat energy loss is big.The workpiece upper and lower temperature difference is big in the stove, and upper and lower temperature difference reaches 20～40 ℃ during the workpiece ion nitriding, causes temperature control inaccurate.Because recirculated cooling water is taken away a large amount of heats, has increased power consumption greatly.Cold conditions gas needs to consume a large amount of heat energy in stove internal heating, decomposition in addition, causes temperature field in furnace inhomogeneous.
Summary of the invention
Technical problem to be solved in the utility model is to overcome above-mentioned the deficiencies in the prior art, provides that a kind of rational in infrastructure, insulation and temperature control quality height, recirculated cooling water consumption are little, the energy-saving ion nitrifying furnace of high efficiency.
The technical scheme in the invention for solving the above technical problem is: a kind of energy-saving ion nitrifying furnace, it comprises body of heater, furnace hearth plate, cathode bearing is housed in the middle of the furnace hearth plate, body of heater is provided with heat protection screen and outer cooling cowl again, be the heat insulating cavity between heat protection screen and the outer cooling cowl, it is characterized in that: heat protection screen is the sealed, thermally insulated thermal insulation layer of double-layer stainless steel, furnace hearth plate is provided with the furnace bottom thermoscreen, nitriding gas enters pipeline along the heat protection screen outside, enters the intravital gas dispersion ring of stove by the heat protection screen top.
The utility model furnace bottom thermoscreen inside is filled with alumina silicate fiber felt.The intravital gas dispersion ring of stove can carry out preheating to nitriding gas by it near the heat protection screen top.
The utility model is because heat protection screen adopts the sealed, thermally insulated thermal insulation layer of double-layer stainless steel, and furnace hearth plate is provided with furnace bottom thermoscreen, high insulating effect.Nitriding gas is fully preheating in the heat insulating cavity, and utilizes heat protection screen top firing, predecomposition nitriding gas, has reduced the cold conditions gas heating, has decomposed the energy consumption that causes.The contrast prior art, the utility model is rational in infrastructure, insulation and temperature control quality height, recirculated cooling water consumption are little, improved work efficiency, saved the energy, solve the industry difficult problem that the ion nitriding furnace temperature field is inhomogeneous, temperature control inaccurate, the power consumption water loss is big, cancelled cold ammonia preheating and decomposer, reach high quality, less energy-consumption purpose.
Description of drawings
The utility model will be further described below in conjunction with accompanying drawing.
Fig. 1 is a structural representation of the present utility model.
1. furnace hearth plates among the figure, 2. cathode bearing, 3. vacuum suction device, 4. heat protection screen, 5. furnace bottom thermoscreen, 6. outer cooling cowl, 7. heat insulating cavity, 8. nitriding gas enters pipeline, 9. gas dispersion ring, 10. refrigeration cycle water inlet, 11. refrigeration cycle water outs.
Embodiment
As can be seen from Figure 1, a kind of energy-saving ion nitrifying furnace of the utility model, it comprises body of heater, furnace hearth plate 1, and cathode bearing 2 is housed in the middle of the furnace hearth plate 1, furnace hearth plate 1 lower end is provided with a cover vacuum suction device 3.Body of heater is provided with heat protection screen 4 and outer cooling cowl 6 again, is heat insulating cavity 7 between heat protection screen 4 and the outer cooling cowl 6.Outer cooling cowl carries out the recirculated water cooling by refrigeration cycle water inlet 10 and refrigeration cycle water out 11.Nitriding gas enters pipeline 8 and passes heat insulating cavity 7 and enter in the body of heater.The ion nitriding furnace power supply adopts high voltage direct current, body of heater connects positive pole, cathode branch seated connection negative pole, workpiece is installed and is connected on the cathode bearing, after adding high voltage electric between the anode of cathode bearing and body of heater, when voltage reaches a certain numerical value, can puncture the rarefied gas ionized gas between negative electrode and the anode, produce the glow discharge heated parts, workpiece surface is carried out ion Plasma Nitriding Treatment.Above-mentioned composition be connected and prior art basic identical, do not describing in detail.
Characteristics of the present utility model are: heat protection screen 4 is the sealed, thermally insulated thermal insulation layer of double-layer stainless steel, and furnace hearth plate 1 is provided with furnace bottom thermoscreen 5, and furnace bottom thermoscreen 5 inside are filled with alumina silicate fiber felt.After adopting thermal insulating warm-keeping layer in the stove, thermograde is controlled between 80 ℃～100 ℃ in the stove, can guarantee heat exchange balance needs in the stove, can reduce unnecessary power consumption again.The electric power that needs for the identical heat-up rate of LDMC-150 type ion nitriding furnace is reduced to 56KW by original 96KW, and electric power is reduced to 32KW by original 52KW during insulation, and the saves energy effect reaches 17%～25%.Furnace wall temperature is lower than 35 ℃, and required recirculated cooling water consumption and pressure reduce greatly, and 45 ℃ of cooling water outlet temperatures have significantly reduced the heat energy loss that water coolant is taken away, and have reduced heating power.Because convection effects is remarkable, the temperature difference only is ± 5 ℃ in the stove, and the temperature field homogeneity improves greatly.
The utility model nitriding gas enters pipeline 8 along heat protection screen 4 outsides, enters the intravital gas dispersion ring 9 of stove by heat protection screen 4 tops.Gas dispersion ring 9 can carry out preheating to nitriding gas by it near the heat protection screen top.Like this, utilize in the stove more than heat protection screen 4 outside waste heat preheating nitriding gas to 200 ℃, utilize the heating of heat protection screen inside top thermoscreen, predecomposition nitriding gas again, reduce the cold conditions gas heating, decompose the heat-energy losses that causes, and improve nitriding furnace temperature field homogeneity.Can cold ammonia preliminary heating device and resolving device, saves energy about 3%.
Claims (3)
1, a kind of energy-saving ion nitrifying furnace, it comprises body of heater, furnace hearth plate, cathode bearing is housed in the middle of the furnace hearth plate, body of heater is provided with heat protection screen and outer cooling cowl again, between heat protection screen and the outer cooling cowl is the heat insulating cavity, it is characterized in that: heat protection screen is the sealed, thermally insulated thermal insulation layer of double-layer stainless steel, and furnace hearth plate is provided with the furnace bottom thermoscreen, nitriding gas enters pipeline along the heat protection screen outside, enters the intravital gas dispersion ring of stove by the heat protection screen top.
2, energy-saving ion nitrifying furnace as claimed in claim 1 is characterized in that: furnace bottom thermoscreen inside is filled with alumina silicate fiber felt.
3, energy-saving ion nitrifying furnace as claimed in claim 1 is characterized in that: the intravital gas dispersion ring of stove is near the heat protection screen top.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420099336 CN2760046Y (en) | 2004-12-17 | 2004-12-17 | Energy-saving ion nitriding furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420099336 CN2760046Y (en) | 2004-12-17 | 2004-12-17 | Energy-saving ion nitriding furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2760046Y true CN2760046Y (en) | 2006-02-22 |
Family
ID=36082252
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420099336 Expired - Lifetime CN2760046Y (en) | 2004-12-17 | 2004-12-17 | Energy-saving ion nitriding furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2760046Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100460553C (en) * | 2004-12-17 | 2009-02-11 | 天润曲轴股份有限公司 | Energy-saving ion nitrifying furnace |
-
2004
- 2004-12-17 CN CN 200420099336 patent/CN2760046Y/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100460553C (en) * | 2004-12-17 | 2009-02-11 | 天润曲轴股份有限公司 | Energy-saving ion nitrifying furnace |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP03 | Change of name, title or address |
Address after: Shandong province Wendeng Tianrun road 2-13, zip code: 264400 Patentee after: Tianrun Bent Axle Co., Ltd. Address before: No. 5, Heng Shan Road, Shandong, Wendeng Province, China: 264400 Patentee before: Tianrun Crankshaft Co., Ltd. |
|
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| AV01 | Patent right actively abandoned |
Effective date of abandoning: 20090211 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |