CN203346465U - Box-type multi-purpose nitrogenation furnace - Google Patents
Box-type multi-purpose nitrogenation furnace Download PDFInfo
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- CN203346465U CN203346465U CN 201320405399 CN201320405399U CN203346465U CN 203346465 U CN203346465 U CN 203346465U CN 201320405399 CN201320405399 CN 201320405399 CN 201320405399 U CN201320405399 U CN 201320405399U CN 203346465 U CN203346465 U CN 203346465U
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- 238000006902 nitrogenation reaction Methods 0.000 title abstract 4
- 239000007789 gas Substances 0.000 claims abstract description 35
- 230000007246 mechanism Effects 0.000 claims abstract description 34
- 230000005540 biological transmission Effects 0.000 claims abstract description 33
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 31
- 238000001816 cooling Methods 0.000 claims description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 19
- 229910052757 nitrogen Inorganic materials 0.000 claims description 15
- 238000010438 heat treatment Methods 0.000 claims description 11
- 238000000137 annealing Methods 0.000 claims description 9
- 238000004891 communication Methods 0.000 claims description 3
- 230000008676 import Effects 0.000 claims description 3
- 238000005121 nitriding Methods 0.000 abstract description 11
- 238000009413 insulation Methods 0.000 abstract description 2
- 238000007789 sealing Methods 0.000 abstract description 2
- 229910001873 dinitrogen Inorganic materials 0.000 abstract 1
- 101100327917 Caenorhabditis elegans chup-1 gene Proteins 0.000 description 22
- 238000000034 method Methods 0.000 description 15
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 10
- 238000004519 manufacturing process Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- 239000002912 waste gas Substances 0.000 description 7
- 229910021529 ammonia Inorganic materials 0.000 description 5
- 101100438971 Caenorhabditis elegans mat-1 gene Proteins 0.000 description 4
- 238000000354 decomposition reaction Methods 0.000 description 4
- 230000007613 environmental effect Effects 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 238000013022 venting Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 238000005256 carbonitriding Methods 0.000 description 1
- 238000005255 carburizing Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000796 flavoring agent Substances 0.000 description 1
- 235000019634 flavors Nutrition 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000007669 thermal treatment Methods 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
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Abstract
The utility model discloses a box-type multi-purpose nitrogenation furnace. The box-type multi-purpose nitrogenation furnace comprises a front chamber and a rear chamber, the box-type multi-purpose nitrogenation furnace is characterized in that a hollow door bag structure is arranged between the front chamber and the rear chamber, a sealing door is arranged between the hollow door bag structure and the front chamber, a heat insulation door is arranged between the hollow door bag structure and the rear chamber, the hollow door bag structure is provided with a gas inlet and a gas outlet, the gas inlet is connected with a nitrogen gas inlet pipeline, the gas outlet is communicated with the rear chamber, a working piece conveying device is arranged in the front chamber, the front working piece conveying device comprises a front transmission mechanism and a front trolley arranged outside the front chamber, the front trolley is arranged on the front transmission mechanism, a rear working piece conveying device is arranged in the rear chamber, the rear working piece conveying device comprises a rear transmission mechanism and a rear push-and-pull mechanism, and the rear push-and-pull mechanism is arranged on the rear transmission mechanism. The gas nitriding or the gas nitrocarburizing of the multi-purpose furnace is realized by increasing the furnace pressure, and furthermore, the automation degree is improved, and the product quality is stable.
Description
Technical field
The utility model relates to a kind of equipment for Heating Processing, relates in particular to a kind of box nitrogenize multipurpose furnace.
Background technology
Sealing box type multipurpose furnace is used in a large number in China's heat treatment industry, mainly take cementing furnace as main, and carburizing is comparatively ripe by the mult-purpose chamber furnace technology, and nitriding furnace is less.When carrying out the production of nitrogenize, different due to nitriding process and carburization process, require also different to operability and the manufacturability of equipment.Nitriding process is lower than the carburization process temperature, can not surpass 700 ℃, and the homogeneity of furnace temperature can not rely on thermal radiation, and should take thermal convection and thermal conduction as main, and it is high that furnace pressure requires, and the body of heater resistance to air loss is required high, to temperature control precision, requires high.
At present, the type of furnace that China is used when carrying out gas nitriding or gas nitrocarburizing is to take pit furnace as main, nitriding process can require to take water-cooled, oil cooling for different workpiece, and cold or air cooling of stove etc. is multi-form, and pit furnace can also realize putting forward the cooling mode of tank.Sealed mult-purpose chamber furnace for nitriding or carbonitriding also has producer using at home.But generally all exist the deficiency of the following aspects.
1. there is hidden danger in security, main by artificial strick precaution;
2. the work-piece cools form after processing is single, can only carry out oil cooling, maybe can only carry out air cooling, maybe can only carry out furnace cooling, and production efficiency is low;
3. environmental protection aspect, spilling of the raw materials used ammonia of nitriding, pollute air.The off gas treatment mode produced during production is bad also can be polluted the empty institute in production scene;
4. while working, the furnace pressure of multipurpose furnace is less, causes unstable product quality;
4. automation degree of equipment is not high, relatively relies on operator's state of the art, unstable product quality.
Summary of the invention
The utility model purpose is to provide a kind of box nitrogenize multipurpose furnace, by using this structure, increases furnace pressure, improves the level of automation of equipment, Improving The Quality of Products.
For achieving the above object, the technical solution adopted in the utility model is: a kind of box nitrogenize multipurpose furnace comprises cup and rear chamber, described cup is cooling end, and rear chamber is heating part, and described cooling end below is provided with the oil groove refrigerating unit, top, described heating part is provided with a plurality of heat agitated fans
Be provided with a hollow family bag structure between described cup and rear chamber, be provided with hermatic door between described hollow family bag structure and described cup, be provided with insulated door between hollow family bag structure and described rear chamber, described hollow family bag structure is provided with inlet, outlet, described inlet mouth is connected with the nitrogen intake line, and air outlet is communicated with described rear chamber;
Described cup is provided with a front work handling device, described front work handling device comprises front transmission mechanism and is arranged at the front push-and-pull vehicle of front outdoor, described front transmission mechanism comprises the driving front gear that is arranged at cup hermatic door place, is arranged at the cup slide rail in cup and is arranged at the driving front chain on the cup slide rail, described driving front chain one end is connected with the driving front gear, the other end is connected with the driving front chain drive mechanism of front outdoor, and described front push-and-pull vehicle is arranged on the driving front chain of front outdoor;
The described rear indoor rear work handling device that is provided with, described rear work handling device comprises rear transmission rig and rear push-pull mechanism, described rear transmission rig comprises final drive gear, the rear indoor aft ramp that is arranged at place, back door, rear chamber and is arranged at the rear transmission chain on aft ramp, described rear transmission chain one end is connected with final drive gear, the other end is connected with the rear transmission chain driving mechanism of rear outdoor, and described rear push-pull mechanism is arranged on described rear transmission chain.
In technique scheme, hermatic door is provided with sealing-ring, be provided with microgap between insulated door and doorframe, hollow family bag structure is set between cup and rear chamber, the air outlet of hollow family bag structure is through hermatic door and insulated door and cup, rear chamber is connected, inlet mouth is connected with the nitrogen intake line, during work, the nitrogen intake line is punched into nitrogen in the bag structure of hollow family, hermatic door is compressed by hold-down gear, guarantee air tight, a small amount of nitrogen enters in rear chamber by the gap between insulated door and rear chamber, more than can guaranteeing that so rear indoor operating air pressure reaches 1000Pa, guarantee the quality of heat treatment of workpieces.At cup and the rear indoor forward and backward work handling device that is respectively arranged with, during work, front push-and-pull vehicle pushes cup through front transmission mechanism by the workpiece charging tray, after the workpiece charging tray enters the cup predetermined position, front push-and-pull vehicle exits cup automatically, then the nitrogen in hollow family bag structure enters cup, is taken a breath; After ventilation finishes, hermatic door and insulated door are opened, and the rear push-pull mechanism in rear work handling device pulls to rear chamber by the workpiece charging tray, and insulated door and hermatic door are closed, carry out the nitriding processing, after finishing dealing with, insulated door and hermatic door are opened, rear push-pull mechanism by the workpiece charging tray from chamber push cup to, carry out cooling process, after finishing dealing with, front push-and-pull vehicle is pulled out cup by the workpiece charging tray, completes processing.In the utility model, front Workpiece transmission device is responsible for the workpiece charging tray is pushed to cup or the workpiece charging tray is pulled out to body of heater, rear work handling device is responsible for workpiece charging tray Huo Conghou chamber in chamber from cup is drawn in is pushed to cup, cooperation by forward and backward work handling device, make the level of automation of nitrogenize multipurpose furnace higher, reduce operator's labour intensity, improved production efficiency.
In technique scheme, the top of described cooling end also is provided with an annealing device, described annealing device comprises the pump circulation fan at top and the water jacket of both sides, the water-in of described water jacket is connected with the cold water generator of multipurpose furnace outside, and water outlet is connected with the water-freeing arrangement of multipurpose furnace outside.The flow conductance that the workpiece heat of heat stirs by radiation and pump circulation fan is to the furnace wall water jacket, by water jacket and pump circulation fan, heat is taken away, by annealing device is set, can make workpiece obtain under the effect of water jacket slower than oil cooling, workpiece deformation is little, but than an air cooling speed of cooling faster.
In technique scheme, each described heat agitated fan below is provided with a pod, described pod is lifted on after described indoor through syndeton, the pod top is provided with air stream outlet, bottom is provided with airflow inlet, and the space between described pod and rear chamber interior walls forms the circulation passage of described air stream outlet to airflow inlet.By pod is set, the air flow energy that can make the heat agitated fan produce is circulated along circulation passage, completes a pump circulation of air-flow, guarantees that the temperature homogeneity of heating part is within ± 5 ℃.
In technique scheme, also comprise that one is arranged at the emission-control equipment at top, described rear chamber, described emission-control equipment comprises exhaust supervisor and the gas flare that connects front chamber gas outlet and rear chamber gas outlet, described exhaust supervisor is connected with the import of gas flare, the outlet of gas flare is in communication with the outside, and described exit is equipped with check valve.When in described check valve assurance stove, negative pressure occurs, air can not enter in stove from venting port, avoid air to enter in stove and mix the danger set off an explosion with inflammable gas, by emission-control equipment is set, the waste gas produced in cup and rear chamber can be pooled in burner and carry out combustion decomposition, simultaneously, nitriding temperature is generally at 500-600 ℃, but 651.1 ℃ of the spontaneous ignition temperatures of ammonia, ammonia decomposes just more abundant more than 900 ℃, waste gas makes the waste-gas burning accumulation of heat produce high temperature through the inboard spirane structure of the outer insulation of high-temp combustion afterburner, in waste gas, ammonia at high temperature fully decomposes fully burning, environmental protection more.
In technique scheme, described gas flare below is provided with primary heater unit, and this primary heater unit is provided with trip switch.Primary heater unit is not have accumulation of heat to use in the situation that just blow-on burner temperature is low, improves the waste gas decomposition efficiency.
In technique scheme, described front push-and-pull vehicle and rear push-pull mechanism are provided with the push-and-pull hook, and described push-and-pull hook coordinates with draw ring on the workpiece charging tray.
In technique scheme, described hermatic door is provided with sealing-ring, between described insulated door and doorframe, is provided with microgap.
Because technique scheme is used, the advantage that the utility model compared with prior art has is:
1. be provided with a hollow family bag structure between cup and rear chamber due to the utility model, the inlet mouth of hollow family bag structure is connected with the nitrogen intake line, air outlet and front, rear chamber is communicated with, pour nitrogen during work in the bag structure of hollow family, produce air pressure, more than can effectively guaranteeing that operating pressure in rear chamber reaches 1000Pa, guaranteed the processing quality of product, simultaneously before cup and rear indoor the setting, rear work handling device, by front, the cooperation of rear work handling device can be controlled the automatic turnover stove of workpiece, level of automation is higher, effectively alleviated operator's labour intensity, improved production efficiency,
2. be provided with the annealing device be comprised of pump circulation fan and water jacket at the top of cooling end, the water-in of the water jacket cold water generator outer with stove is connected, and by annealing device is set, when not adopting oil cooling, can improve the speed of cooling of workpiece;
3. at the top of rear chamber, one emission-control equipment is installed, described emission-control equipment comprises exhaust supervisor and the gas flare that connects front chamber gas outlet and rear chamber gas outlet, vapor pipe puts together waste gas in burner and fully burns, obnoxious flavour at high temperature can be decomposed, resolve into free of contamination air, the feature of environmental protection is stronger;
4. be provided with a check valve on emission-control equipment, by check valve is set, when in described check valve assurance stove, negative pressure occurs, air can not enter in stove from venting port, avoid air to enter in stove and mix the danger set off an explosion with inflammable gas, can guarantee that air can not enter in stove from emission-control equipment simultaneously, disturb the thermal treatment of internal workpiece, guarantee the processing quality of product;
5. primary heater unit is set below burner, can carries out combustion-supporting decomposition to undecomposed ammonia, by on-off control, make the burner can be by the abundant combustion decomposition of waste gas, the feature of environmental protection be good.
The accompanying drawing explanation
Fig. 1 is the structural representation in the utility model embodiment mono-;
Fig. 2 is the structural representation of emission-control equipment in the utility model embodiment mono-;
Fig. 3 is a kind of pod structural representation of the utility model embodiment.
Wherein: 1, cup; 2, rear chamber; 3, oil groove refrigerating unit; 4, heat agitated fan; 5, pod; 6, air stream outlet; 7, airflow inlet; 8, circulation passage; 9, hollow family bag structure; 10, hermatic door; 11, insulated door; 12, sealing-ring; 13, front push-and-pull vehicle; 14, cup slide rail; 15, driving front chain; 16, rear push-pull mechanism; 17, back door; 18, final drive gear; 19, pump circulation fan; 20, water jacket; 21, front chamber gas outlet; 22, rear chamber gas outlet; 23, exhaust supervisor; 24, gas flare; 25, check valve; 26, primary heater unit; 27, aft ramp; 28, rear transmission chain.
Embodiment
Below in conjunction with drawings and Examples, the utility model is further described:
Embodiment mono-: shown in Fig. 1～3, a kind of box nitrogenize multipurpose furnace, comprise cup 1 and rear chamber 2, described cup 1 is cooling end, rear chamber 2 is heating part, described cooling end below is provided with oil groove refrigerating unit 3, top, described heating part is provided with 2 heat agitated fans 4, each described heat agitated fan 4 below is provided with a pod 5, described pod 5 through syndeton be lifted on described after in chamber 2, pod 5 tops are provided with air stream outlet 6, bottom is provided with airflow inlet 7, space between described pod 5 and rear chamber 2 inwalls forms the circulation passage 8 of described air stream outlet 6 to airflow inlet 7.
As shown in Figure 1, be provided with a hollow family bag structure 9 between described cup 1 and rear chamber 2, be provided with hermatic door 10 between described hollow family bag structure 9 and described cup 1, be provided with insulated door 11 between hollow family bag structure 9 and described rear chamber 2, described hermatic door 10 is provided with sealing-ring 12, between described insulated door 11 and doorframe, is provided with microgap, and described hollow family bag structure 9 is provided with inlet, outlet, described inlet mouth is connected with the nitrogen intake line, and air outlet is communicated with described rear chamber 2.
As shown in Figure 1, described cup 1 is provided with a front work handling device, described front work handling device comprises front transmission mechanism and is arranged at the front push-and-pull vehicle 13 of cup 1 outside, described front transmission mechanism comprises the driving front gear that is arranged at cup 1 hermatic door 10 places, is arranged at the cup slide rail 14 in cup 1 and is arranged at the driving front chain 15 on cup slide rail 14, described driving front chain 15 1 ends are connected with the driving front gear, the other end is connected with the driving front chain drive mechanism of cup 1 outside, and described front push-and-pull vehicle 13 is arranged on the driving front chain 15 of cup 1 outside; Be provided with a rear work handling device in described rear chamber 2, described rear work handling device comprises rear transmission rig and rear push-pull mechanism 16, described rear transmission rig comprises final drive gear 18, the rear indoor aft ramp 27 that is arranged at 17 places, 2 back door, rear chamber and is arranged at the rear transmission chain 28 on aft ramp 27, described rear transmission chain 28 1 ends are connected with final drive gear 28, the other end is connected with the rear transmission chain driving mechanism of 2 outsides, rear chamber, described rear push-pull mechanism 16 is arranged on described rear transmission chain 28, and described forward and backward transmission chain driving mechanism is drive-motor.Described front push-and-pull vehicle 13 and rear push-pull mechanism 16 are provided with the push-and-pull hook, and described push-and-pull hook coordinates with draw ring on the workpiece charging tray.
The top of described cooling end also is provided with an annealing device, described annealing device comprises the pump circulation fan 19 at top and the water jacket 20 of both sides, the water-in of described water jacket 20 is connected with the cold water generator of multipurpose furnace outside, water outlet is connected with the water-freeing arrangement of multipurpose furnace outside, as shown in Figure 1.
As shown in Figure 2, also comprise that one is arranged at the emission-control equipment at 2 tops, described rear chamber, described emission-control equipment comprises exhaust supervisor 23 and the gas flare 24 that connects front chamber gas outlet 21 and rear chamber gas outlet 22, described exhaust supervisor 23 is connected with the import of gas flare 24, the outlet of gas flare 24 is in communication with the outside, and described exit is equipped with check valve 25.Described gas flare 24 belows are provided with primary heater unit 26, and this primary heater unit 26 is provided with trip switch.
In the present embodiment, hermatic door 10 is provided with sealing-ring 12, be provided with microgap between insulated door 11 and doorframe, hollow family bag structure 9 is set between cup 1 and rear chamber 2, the air outlet of hollow family bag structure 9 is through hermatic door 10 and insulated door 11 and cup 1, rear chamber 2 is connected, inlet mouth is connected with the nitrogen intake line, during work, the nitrogen intake line is punched into nitrogen in hollow family bag structure 9, produce air pressure, hermatic door 10 is compressed, guarantee air tight, a small amount of nitrogen enters in rear chamber 2 by the gap between insulated door 11 and rear chamber 2, more than can guaranteeing that so rear chamber 2 interior operating air pressures reach 1000Pa, guarantee the quality of heat treatment of workpieces.Be respectively arranged with forward and backward work handling device in cup 1 and rear chamber 2, during work, front push-and-pull vehicle 13 pushes cup 1 by the workpiece charging tray, after the workpiece charging tray enters cup 1 predetermined position, front push-and-pull vehicle 13 exits cup 1 automatically, and then the nitrogen in hollow family bag structure 9 enters cup 1, is taken a breath; After ventilation finishes, hermatic door 10 and insulated door 11 are opened, and the rear push-pull mechanism 16 in rear work handling device pulls to rear chamber 2 by the workpiece charging tray, and insulated door 11 and hermatic door 10 are closed, carry out the nitriding processing, after finishing dealing with, insulated door 11 and hermatic door 10 are opened, rear push-pull mechanism 16 by the workpiece charging tray from chamber 2 push cup 1 to, carry out cooling process, after finishing dealing with, front push-and-pull vehicle 13 is pulled out cup 1 by the workpiece charging tray, completes processing.In the utility model, front Workpiece transmission device is responsible for the workpiece charging tray is pushed to cup 1 or the workpiece charging tray is pulled out to body of heater, rear work handling device be responsible for by the workpiece charging tray from cup 1 is drawn in chamber 2 or from chamber 2 push cup 1, cooperation by forward and backward work handling device, make the level of automation of multipurpose furnace higher, reduce operator's labour intensity, improved production efficiency.
Claims (7)
1. a box nitrogenize multipurpose furnace, comprise cup and rear chamber, and described cup is cooling end, and rear chamber is heating part, and described cooling end below is provided with oil groove and refrigerating unit, and top, described heating part is provided with a plurality of heat agitated fans, it is characterized in that:
Be provided with a hollow family bag structure between described cup and rear chamber, be provided with hermatic door between described hollow family bag structure and described cup, be provided with insulated door between hollow family bag structure and described rear chamber, described hollow family bag structure is provided with inlet, outlet, described inlet mouth is connected with the nitrogen intake line, and air outlet is communicated with described rear chamber;
Described cup is provided with a front work handling device, described front work handling device comprises front transmission mechanism and is arranged at the front push-and-pull vehicle of front outdoor, described front transmission mechanism comprises the driving front gear that is arranged at cup hermatic door place, is arranged at the cup slide rail in cup and is arranged at the driving front chain on the cup slide rail, described driving front chain one end is connected with the driving front gear, the other end is connected with the driving front chain drive mechanism of front outdoor, and described front push-and-pull vehicle is arranged on the driving front chain of front outdoor;
The described rear indoor rear work handling device that is provided with, described rear work handling device comprises rear transmission rig and rear push-pull mechanism, described rear transmission rig comprises final drive gear, the rear indoor aft ramp that is arranged at place, back door, rear chamber and is arranged at the rear transmission chain on aft ramp, described rear transmission chain one end is connected with final drive gear, the other end is connected with the rear transmission chain driving mechanism of rear outdoor, and described rear push-pull mechanism is arranged on described rear transmission chain.
2. box nitrogenize multipurpose furnace according to claim 1, it is characterized in that: the top of described cooling end also is provided with an annealing device, described annealing device comprises the pump circulation fan at top and the water jacket of both sides, the water-in of described water jacket is connected with the cold water generator of multipurpose furnace outside, and water outlet is connected with the water-freeing arrangement of multipurpose furnace outside.
3. box nitrogenize multipurpose furnace according to claim 1, it is characterized in that: each described heat agitated fan below is provided with a pod, described pod is lifted on after described indoor through syndeton, the pod top is provided with air stream outlet, bottom is provided with airflow inlet, and the space between described pod and rear chamber interior walls forms the circulation passage of described air stream outlet to airflow inlet.
4. box nitrogenize multipurpose furnace according to claim 1, it is characterized in that: also comprise that one is arranged at the emission-control equipment at top, described rear chamber, described emission-control equipment comprises exhaust supervisor and the gas flare that connects front chamber gas outlet and rear chamber gas outlet, described exhaust supervisor is connected with the import of gas flare, the outlet of gas flare is in communication with the outside, and described exit is equipped with check valve.
5. box nitrogenize multipurpose furnace according to claim 4 is characterized in that: described gas flare below is provided with primary heater unit, and this primary heater unit is provided with trip switch.
6. box nitrogenize multipurpose furnace according to claim 1, it is characterized in that: described front push-and-pull vehicle and rear push-pull mechanism are provided with the push-and-pull hook, and described push-and-pull hook coordinates with draw ring on the workpiece charging tray.
7. box nitrogenize multipurpose furnace according to claim 1, it is characterized in that: described hermatic door is provided with sealing-ring, between described insulated door and doorframe, is provided with microgap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320405399 CN203346465U (en) | 2013-07-08 | 2013-07-08 | Box-type multi-purpose nitrogenation furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320405399 CN203346465U (en) | 2013-07-08 | 2013-07-08 | Box-type multi-purpose nitrogenation furnace |
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| Publication Number | Publication Date |
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| CN203346465U true CN203346465U (en) | 2013-12-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320405399 Expired - Fee Related CN203346465U (en) | 2013-07-08 | 2013-07-08 | Box-type multi-purpose nitrogenation furnace |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103388120A (en) * | 2013-07-08 | 2013-11-13 | 江苏益科热处理设备有限公司 | Box type nitriding multipurpose furnace |
-
2013
- 2013-07-08 CN CN 201320405399 patent/CN203346465U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103388120A (en) * | 2013-07-08 | 2013-11-13 | 江苏益科热处理设备有限公司 | Box type nitriding multipurpose furnace |
| CN103388120B (en) * | 2013-07-08 | 2015-11-18 | 江苏益科热处理设备有限公司 | A kind of box nitrogenize multipurpose furnace |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131218 |
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| CU01 | Correction of utility model | ||
| CU01 | Correction of utility model |
Correction item: Termination upon expiration of patent Correct: Revocation of Patent Expiration and Termination False: On July 25, 2023, the expiration and termination of the 39-volume 3001 patent Number: 30-01 Volume: 39 |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131218 |