CN103031415A - Continuous protective atmosphere heating high-pressure gas quenching furnace - Google Patents
Continuous protective atmosphere heating high-pressure gas quenching furnace Download PDFInfo
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- CN103031415A CN103031415A CN2011103041461A CN201110304146A CN103031415A CN 103031415 A CN103031415 A CN 103031415A CN 2011103041461 A CN2011103041461 A CN 2011103041461A CN 201110304146 A CN201110304146 A CN 201110304146A CN 103031415 A CN103031415 A CN 103031415A
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Abstract
The invention discloses a continuous protective atmosphere heating high-pressure gas quenching furnace which is characterized by comprising a continuous protective atmosphere heating furnace, wherein the protective atmosphere heating furnace comprises a vacuum air exchange antechamber, a heating zone and a heat preserving zone; the heat preserving zone of the continuous protective atmosphere heating furnace is in sealed connection with a high-pressure gas quenching chamber; and the high-pressure gas quenching chamber is hermetically connected with a vacuum air exchange discharging chamber. The vacuum air exchange antechamber plays the roles of preventing the air entering the heating zone, shortening the air exchange time and reducing the nitrogen consumption; the heating zone and the heat preserving zone play the role of protecting the protective atmosphere heating furnace, wherein the protective gas can be nitrogen and methanol atmosphere or nitrogen and ammonia cracking gas; and the vacuum air exchange discharging chamber plays the role of preventing the air from entering the high-pressure gas quenching chamber. The furnace disclosed by the invention has the advantages of reducing the equipment investment cost and the energy consumption, increasing the high-pressure gas quenching intensity, increasing the equipment automation degree and reducing the labor intensity and the labor cost.
Description
Technical field
The present invention relates to a kind of continuous protective atmosphere heating high-pressure gas quenching furnace.
Background technology
Following methods is adopted in the thermal treatment of the low-carbon alloy steel carburized parts of having relatively high expectations for distortion and degree of cleaning at present: the first step: in slow cooling under protective atmosphere again after the atmosphere furnace carburizing, perhaps carry out afterwards slow cooling of low-pressure carburization or gas quench (increasing temperature tempering) in vacuum oven; Second step: carry out precision work; The 3rd step: in vacuum oven, carry out high pressure gas quenching again.What the 3rd step was general used all is the single chamber vacuum furnace that single heat is processed, with reference to shown in Figure 1.Adopt the shortcoming of vacuum oven to be: the vacuum oven equipment cost is higher; Heating chamber is together by repeatedly heating and cooling, thereby energy consumption is large; One-way fired furnace is inadequate than the quenching intensity of ambassador's workpiece because of batch, can only reduce batch, and actual efficiency is not high.
Quenching intensity requires when high, also has to adopt two chamber vacuum furnace.But because vacuum oven heating system and refractory materials at high temperature can not be seen air, therefore all adopt the mode of simple gate input and output material.Open the door in general cold house (gas quench chamber), heating chamber is in the back, cold house, and middle door is vacuum and high pressure seal.The shortcoming of this structure is: cold and hot chamber takes turns to operate, and heating chamber was idle when gas was quenched, but must keep high temperature and vacuum tightness, therefore plant factor is low, energy consumption is high.Another kind of dual chamber furnace is that heating chamber opens the door, and gas is quenched the chamber in the back.The gas rear part of quenching must be come out of the stove from heating chamber, therefore the front heating chamber of coming out of the stove also must cooling.Namely except cold and hot chamber utilization ratio was low, heating chamber was the same with one-way fired furnace, also was repeatedly to heat and cool off, therefore energy consumption is higher.Other dual chamber furnace complex structure, two sects all must vacuum-sealing and high pressure seals.Rear chamber also must arrange access door.The stove domestic demand arranges the push-and-pull material mechanism of working under vacuum state.Because under vacuum state, the running gear lack of lubrication is therefore the pusher failure rate is high.
Summary of the invention
Technical problem to be solved by this invention is to reduce equipment investment cost and energy consumption, the quenching intensity that improves high pressure gas quenching; Improve automation degree of equipment, reduce labour intensity and cost of labor.
In order to solve the problems of the technologies described above, technical scheme of the present invention is as follows:
A kind of continuous protective atmosphere heating high-pressure gas quenching furnace; it is characterized in that; comprise the continuous protecting-atmosphere process furnace; the protective atmosphere process furnace comprises vacuum air-changing cup, heating zone and heat preservation zone; the heat preservation zone of the continuous protecting-atmosphere process furnace high pressure gas quenching chamber that is tightly connected, the high pressure gas quenching chamber vacuum air-changing discharge chamber that is tightly connected.The effect of vacuum air-changing cup is to avoid air to enter the heating zone, and shortens time of exchanging gas, reduces nitrogen consumption.Heating chamber and heat preservation zone are the protective atmosphere process furnace, and protection gas can be that nitrogen methanol atmospheres or nitrogen add ammonia pyrolysis gas.The effect of vacuum air-changing discharge chamber is to prevent that air from entering the high pressure gas quenching chamber.
Described vacuum air-changing cup is divided into upper and lower two Room, a double-layer lifting platform is set in the vacuum air-changing cup, lower floor is material level, the upper strata is the forvacuum lid, the forvacuum lid connects the forvacuum system, when the double-layer lifting platform is in when the next, the base plate sealing of the upper chamber of forvacuum lid and vacuum air-changing cup makes lower chamber become the confined chamber of vacuum-pumping
Compared with prior art, beneficial effect of the present invention is:
(1), heating chamber is in Heating temperature all the time, avoids heating chamber repeatedly to cool off and heats, energy consumption is low;
(2), heating chamber is in normal pressure (pressure-fired) state all the time, is common welded steel structure, low cost of manufacture;
(3), the high pressure gas quenching chamber is under the low-temperature condition all the time, avoided equally repeatedly cooling off and heating, also need not to consider must adopt the high fire-resistant heat insulating material of cost compare because of heating and cooling repeatedly.Not only energy-conservation, and quenching intensity is high, and under same stocking space and cooling power prerequisite, batch is large, or under same batch condition, low to quenching circulation motor power requirement, reduce the impact on electrical network, equipment cost is also lower;
(4), the one direction logistics, equipment work chamber utilization ratio is high, wastes lowly, simultaneously also easily improves level of automation, hand labor intensity is low;
(5), adopt chamber after vacuum air-changing cup and the discharging, scavenging efficiency is high, reduces the consumption of ventilation nitrogen.
Description of drawings
Fig. 1 is the single chamber vacuum furnace structural representation;
Fig. 2 is the continuous protective atmosphere heating high-pressure gas quenching furnace structural representation;
Fig. 3 is A-A sectional view among Fig. 2.
Among the figure, 1-feeding area, 2-feeding unit, the Pneumatic reverse turning bed door of 3-, 4-vacuum air-changing cup, insulated door in the middle of the 5-first, the 6-heating zone, 7-the first flexible chain pusher, 8-the first locating device, insulated door in the middle of the 9-second, 10-heat preservation zone, 11-the second flexible chain pusher, 12-the second locating device, insulated door in the middle of the 13-the 3rd, 14-high pressure gas quenching chamber, 15-vacuum air-changing discharge chamber, 16-lifting table, 17-discharging area, the built-in feeding gate of 18-, the 19-gas recirculation blower of quenching, the built-in discharge door of 20-, 21-discharging external door, 22-atmosphere recirculation blower, 23-electrically heated radiator tube, the 24-fire door, the 25-hot-zone, 26-heating system, the 27-gas airflow-reversing baffle plate of quenching, 28-heating cycle blower fan, 29-airflow-reversing baffle plate, 30-water cooler, the 31-gas recirculation blower of quenching.
Embodiment
With reference to Fig. 2 and shown in Figure 3, continuous protective atmosphere heating high-pressure gas quenching furnace comprises the continuous protecting-atmosphere process furnace, the heat preservation zone 10 of the protective atmosphere process furnace high pressure gas quenching chamber 14 that is tightly connected, the high pressure gas quenching chamber 14 vacuum air-changing discharge chamber 15 that is tightly connected.
Described protective atmosphere process furnace comprises vacuum air-changing cup 4, heating zone 6 and heat preservation zone 10; vacuum air-changing cup 4 is the bottom charging method; vacuum air-changing cup 4 is divided into two Room; lower chamber is provided with Pneumatic reverse turning bed door 3 and feeds from feeding area 1 by feeding unit 2; forvacuum ventilation after the level charging of lower chamber; upper chamber is the pusher transition chamber, is normal protective atmosphere environment.Pusher transition chamber and heating zone 6 separate by the first middle insulated door 5.Vacuum air-changing cup 4 is interior to arrange a double-layer lifting platform, and lower floor is material level, and the upper strata is the forvacuum lid.The forvacuum lid connects the forvacuum system and (comprises a sliding vane rotary pump, Pneumatic butterfly valve, vacuumometer, tensimeter, pipeline etc.), nitrogen adds ammonia pyrolysis gas as heated protective atmosphere.When the double-layer lifting platform is in when the next, and the end blocking door of feeding from the outside is when closing, and the base plate sealing of the upper chamber of upper strata forvacuum lid and vacuum air-changing cup 4 makes lower chamber become the confined chamber of vacuum-pumping.When lifting table is in when upper, lower floor's material level has identical transmission height with stove.Heating zone 6 and heat preservation zone 10 are separated by the second middle insulated door 9, and 6 charging trays are promoted by the double rack pusher in the heating zone, and reducing motor drives.Promoted by the first flexible chain pusher 7 at heat preservation zone 10 charging trays, reducing motor drives.Charging tray from moist closet 10 to high pressure gas quenching chamber 14 shifts by the second flexible chain pusher 11 and promotes, and variable frequency reducer motor drives.Heating zone 6 and heat preservation zone 10 are respectively equipped with the first locating device 8 and the second locating device 12.Vertically arranged electrically heated radiator tube 23 heating that heating zone 6 and heat preservation zone 10 adopt both sides to arrange.Furnace roof is installed atmosphere recirculation blower 22 and is used for the atmosphere strong stirring.Insulated door 13 in the middle of being provided with the 3rd between heat preservation zone 10 and the high pressure gas quenching chamber 14.
Double wall water-cooled vessel shell is adopted in described high pressure gas quenching chamber 14, is fit to high pressure gas quenching.High pressure gas quenching chamber 14 is through structure, is with a high pressure resistant built-in feeding gate 18 and a built-in discharge door 20.Built-in feeding gate 18 and built-in discharge door 20 by on put air cylinder driven.High pressure gas quenching chamber 14 built-in water-cooling interchanger, water cooling heat exchanger is the coil tube type structure, the band radiating fin.Be provided with the gas that is formed by centrifugation blade and the motor recirculation blower 19 of quenching in the high pressure gas quenching chamber 14.High pressure gas quenching chamber 14 connects nitrogen circulating system, and nitrogen circulating system connects inflation pressure control and blow-off system.Vacuum air-changing discharge chamber 15 is used for vacuumizing ventilation after the discharging.Vacuum air-changing discharge chamber 15 has the discharging external door 21 of air cylinder driven, and the discharging transition chamber vacuum is sealed.The discharging external door 21 outer lifting tables 16 that are provided with, lifting table 16 connects discharging area 17.
Claims (2)
1. continuous protective atmosphere heating high-pressure gas quenching furnace; it is characterized in that; comprise the continuous protecting-atmosphere process furnace; the protective atmosphere process furnace comprises vacuum air-changing cup (4), heating zone (6) and heat preservation zone (10); the heat preservation zone of continuous protecting-atmosphere process furnace (10) the high pressure gas quenching chamber (14) that is tightly connected, high pressure gas quenching chamber (14) the vacuum air-changing discharge chamber (15) that is tightly connected.
2. continuous protective atmosphere heating high-pressure gas quenching furnace as claimed in claim 1; it is characterized in that; described vacuum air-changing cup (4) is divided into upper and lower two Room; a double-layer lifting platform is set in the vacuum air-changing cup (4), and lower floor is material level, and the upper strata is the forvacuum lid; the forvacuum lid connects the forvacuum system; when the double-layer lifting platform is in when the next, the base plate sealing of the upper chamber of forvacuum lid and vacuum air-changing cup (4) makes lower chamber become the confined chamber of vacuum-pumping.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011103041461A CN103031415A (en) | 2011-10-10 | 2011-10-10 | Continuous protective atmosphere heating high-pressure gas quenching furnace |
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| CN2011103041461A CN103031415A (en) | 2011-10-10 | 2011-10-10 | Continuous protective atmosphere heating high-pressure gas quenching furnace |
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| CN103031415A true CN103031415A (en) | 2013-04-10 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105400934A (en) * | 2015-11-23 | 2016-03-16 | 苏州市职业大学 | Vertical type hardening furnace |
| CN106755918A (en) * | 2016-12-16 | 2017-05-31 | 大连哈尼比科技有限公司 | A kind of vacuum water quenching method of vacuum water quenching system and bearing |
| CN106967874A (en) * | 2017-04-27 | 2017-07-21 | 江苏石川岛丰东真空技术有限公司 | A kind of feed system of heat treatment two chamber vacuum furnace |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4462577A (en) * | 1982-12-16 | 1984-07-31 | C.I. Hayes Inc. | Apparatus for gas cooling work parts under high pressure in a continuous heat treating vacuum furnace |
| CN101186958A (en) * | 2007-11-29 | 2008-05-28 | 苏州市万泰真空炉研究所有限公司 | Double-chamber high-pressure gas-quenching vacuum furnace |
| CN202220189U (en) * | 2011-08-05 | 2012-05-16 | 上海汇森益发工业炉有限公司 | Continuous type protective atmosphere heating high-pressure gas quenching furnace |
| CN202297699U (en) * | 2011-10-10 | 2012-07-04 | 上海汇森益发工业炉有限公司 | Continuous protective atmosphere heating high-pressure gas quenching furnace |
-
2011
- 2011-10-10 CN CN2011103041461A patent/CN103031415A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4462577A (en) * | 1982-12-16 | 1984-07-31 | C.I. Hayes Inc. | Apparatus for gas cooling work parts under high pressure in a continuous heat treating vacuum furnace |
| CN101186958A (en) * | 2007-11-29 | 2008-05-28 | 苏州市万泰真空炉研究所有限公司 | Double-chamber high-pressure gas-quenching vacuum furnace |
| CN202220189U (en) * | 2011-08-05 | 2012-05-16 | 上海汇森益发工业炉有限公司 | Continuous type protective atmosphere heating high-pressure gas quenching furnace |
| CN202297699U (en) * | 2011-10-10 | 2012-07-04 | 上海汇森益发工业炉有限公司 | Continuous protective atmosphere heating high-pressure gas quenching furnace |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105400934A (en) * | 2015-11-23 | 2016-03-16 | 苏州市职业大学 | Vertical type hardening furnace |
| CN106755918A (en) * | 2016-12-16 | 2017-05-31 | 大连哈尼比科技有限公司 | A kind of vacuum water quenching method of vacuum water quenching system and bearing |
| CN106967874A (en) * | 2017-04-27 | 2017-07-21 | 江苏石川岛丰东真空技术有限公司 | A kind of feed system of heat treatment two chamber vacuum furnace |
| CN106967874B (en) * | 2017-04-27 | 2019-01-22 | 江苏石川岛丰东真空技术有限公司 | A kind of heat treatment feed system of two chamber vacuum furnace |
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Application publication date: 20130410 |