CN114807570A - Continuous multi-chamber heat treatment furnace and treatment process thereof - Google Patents
Continuous multi-chamber heat treatment furnace and treatment process thereof Download PDFInfo
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- CN114807570A CN114807570A CN202210604690.6A CN202210604690A CN114807570A CN 114807570 A CN114807570 A CN 114807570A CN 202210604690 A CN202210604690 A CN 202210604690A CN 114807570 A CN114807570 A CN 114807570A
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 149
- 238000000034 method Methods 0.000 title claims abstract description 19
- 230000008569 process Effects 0.000 title claims abstract description 17
- 238000001816 cooling Methods 0.000 claims abstract description 39
- 238000007789 sealing Methods 0.000 claims description 18
- 239000007789 gas Substances 0.000 claims description 9
- 230000008676 import Effects 0.000 claims description 8
- 230000001681 protective effect Effects 0.000 claims description 5
- 239000011261 inert gas Substances 0.000 claims description 3
- 230000009467 reduction Effects 0.000 claims description 3
- 239000000463 material Substances 0.000 claims 2
- 230000003028 elevating effect Effects 0.000 claims 1
- 238000005265 energy consumption Methods 0.000 abstract description 4
- 230000007246 mechanism Effects 0.000 abstract description 4
- 238000007599 discharging Methods 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 abstract description 2
- 239000013589 supplement Substances 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0062—Heat-treating apparatus with a cooling or quenching zone
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
- C21D1/773—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material under reduced pressure or vacuum
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D11/00—Process control or regulation for heat treatments
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0006—Details, accessories not peculiar to any of the following furnaces
- C21D9/0018—Details, accessories not peculiar to any of the following furnaces for charging, discharging or manipulation of charge
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0006—Details, accessories not peculiar to any of the following furnaces
- C21D9/0025—Supports; Baskets; Containers; Covers
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Abstract
The invention discloses a multi-chamber heat treatment furnace and a treatment process thereof, wherein the heat treatment furnace comprises a heating furnace assembly consisting of a plurality of heating furnace units which are arranged in parallel, the feeding end of the heating furnace assembly is connected with an inlet exhaust bin, the inlet exhaust bin is connected with an inlet conveyor, the discharging end of the heating furnace assembly is sequentially connected with an air cooling unit and an outlet exhaust bin, the outlet exhaust bin is connected with an outlet conveyor, the inlet exhaust bin and the outlet exhaust bin are respectively connected with a vacuum pump through pipelines, the heating furnace assembly is connected with a vacuum pump assembly, and the multi-chamber heat treatment furnace also comprises a control system. The invention also discloses a treatment process of the heat treatment furnace. By the scheme of the invention, the heating furnace does not need to be cooled and heated repeatedly, so that the energy consumption is greatly reduced, the blank is heated more quickly, and the efficiency is higher; in addition, cold air blows small batches of blanks from top to bottom, and the cooling speed is consistent; the invention uses automatic control technology, and is matched with a conveyor and a transfer mechanism to realize continuous heat treatment without stopping work.
Description
Technical Field
The invention belongs to the technical field of heat treatment furnaces, and particularly relates to a multi-chamber heat treatment furnace and a treatment process thereof.
Background
As shown in figure 1, the heat treatment equipment in the prior art comprises a furnace body, a furnace door, a return air pipe, a fan, an air cooler, a vacuum pump, a control cabinet and other main parts. The blank heat treatment process comprises the following steps: 1. putting the blank (about 200 Kg) into the furnace body, putting the blank in order, and closing the furnace door; 2. the vacuum pump pumps the air in the furnace body to vacuum, and then inert protective gas is injected. The purpose is to prevent the blank from contacting oxygen or other gases which are easy to generate chemical reaction during the heating process; 3. and after heating for a set time, cooling the blank by air cooling. The fan pressurizes the hot air pumped by the air return pipe, the hot air is cooled by the air cooler, and finally the cold air is blown to the surface of the blank, so that the blank is rapidly cooled; 4. and opening the furnace door, taking away the blanks, and carrying out heat treatment on the next batch of blanks.
The defects of the existing heat treatment furnace are as follows: 1. in the air cooling stage, not only the blank but also the furnace body is cooled, and the next batch of blank needs to be heated by heat treatment, so that the temperature of the furnace body and the blank is increased from room temperature to a set temperature, the energy consumption is high, and the time consumption for temperature rise is long. 2. When the air cooling is carried out, the area of the external blank blown by cold air is large, the heat dissipation speed is high, the cooling is rapid, the internal blank is extremely difficult to be blown by the cold air, and the cooling speed is slow. Because the cooling speed inside and outside the same furnace blank is different, the heat treatment performance is different and the consistency is poor. 3. The blank can be heat treated only in one furnace, and the efficiency is low.
Therefore, it is desirable to design a new heat treatment furnace to overcome the above-mentioned drawbacks.
Disclosure of Invention
Aiming at the problem situation, the invention provides a multi-chamber heat treatment furnace and a treatment process thereof, which solve the following problems in the existing heat treatment process: 1. the problems of long temperature rise time and high energy consumption of blank heat treatment are solved; 2. the problem of inconsistent cooling rates inside and outside the blank is solved. 3. The problem of the blank can not continuous heat treatment inefficiency is solved.
In order to achieve the purpose, the invention adopts the technical scheme that:
the utility model provides a multi-chambered heat treatment furnace, includes the heating furnace subassembly of constituteing by a plurality of heating furnace units of arranging in parallel, and the feed end of heating furnace subassembly is connected with import exhaust bin, and import exhaust bin links to each other with the import conveyer, and the discharge end of heating furnace subassembly has connected gradually forced air cooling unit and export exhaust bin, and export exhaust bin links to each other with the export conveyer, import exhaust bin and export exhaust bin pipe connection have the vacuum pump respectively, and the heating furnace subassembly links to each other with the vacuum pump subassembly, multi-chambered heat treatment furnace still includes control system.
As a further technical scheme, a first gate valve is connected between the inlet conveyor and the inlet exhaust bin in a sealing mode, a second gate valve is connected between the inlet exhaust bin and the heating furnace assembly in a sealing mode, the heating furnace units and the last heating furnace unit and the air cooling unit are sealed through flanges, a third gate valve is connected between the air cooling unit and the outlet exhaust bin in a sealing mode, and a fourth gate valve is connected between the outlet exhaust bin and the outlet conveyor in a sealing mode.
As a further technical scheme, conveyors are arranged in the main bins of the inlet exhaust bin, the heating furnace unit, the outlet exhaust bin and the air cooling unit and used for conveying the blanks, and a transfer unit is also arranged in the heating furnace unit and used for transferring the blanks on the conveyors into furnace tubes of the heating furnace unit.
As a further technical scheme, the heating furnace unit comprises a heating body, a furnace tube, a furnace gate valve, a furnace door, a transfer unit and a unit bin body, wherein the furnace tube is arranged in the heating body, one side of the furnace tube is sealed, the other side of the furnace tube is in flange sealing connection with the furnace gate valve, the other side of the furnace gate valve is in flange sealing connection with the unit bin body, a conveyor and a transfer unit are arranged in the unit bin body, the furnace door is arranged on one side, close to the heating body, in the unit bin body, and each heating furnace unit is fixedly communicated with the other heating furnace unit through the unit bin body.
As a further technical scheme, the transfer unit comprises a fork arm, a horizontal moving assembly and a lifting moving assembly, wherein a fork is connected to the fork arm and used for moving a tray for bearing products, and the horizontal moving assembly and the lifting moving assembly are used for controlling the fork arm to move in the horizontal and vertical directions.
As a further technical scheme, the horizontal moving assembly comprises a horizontal rack, a horizontal driving gear, a guide wheel and a horizontal driving motor, wherein the horizontal rack is fixed above the fork arm, the horizontal driving gear is meshed with the horizontal rack, and the horizontal driving motor is connected with the horizontal driving gear and used for controlling the horizontal extension and retraction of the fork arm; guide wheels are arranged on the upper side, the lower side, the left side and the right side of the fork arm and used for guiding and ensuring the fork arm to move horizontally, and the guide wheels are fixed on the lifting movable base.
As a further technical scheme, the lifting moving assembly comprises a lifting driving gear, a lifting rack, a lifting movable base, lifting linear guide rails and a lifting driving motor, wherein the lifting driving gear is meshed with the lifting rack fixed on the lifting movable base, the lifting linear guide rails are arranged on two sides of the lifting movable base and fixed with bearing seats, a driving shaft is sleeved on the bearing seats, the lifting driving gear is fixed on the driving shaft, and the driving shaft is connected with the lifting driving motor.
As a further technical scheme, the air cooling unit comprises a sealed cabin body, a conveyor arranged in the sealed cabin body, a fan, an air cooler and an air supply pipeline, the sealed cabin body, the fan, the air cooler and the air supply pipeline are sequentially connected to form a circulation loop, and the vacuum pump assembly is connected with the sealed cabin body through a pipeline.
The invention also provides a treatment process of the continuous multi-chamber heat treatment furnace, which is carried out by adopting the multi-chamber heat treatment furnace and comprises the following process steps:
(1) and starting the equipment, and controlling the second gate valve and the third gate valve to be closed by the control system to seal the region of the intermediate heating furnace assembly. Synchronously starting a plurality of heating furnace unit power supplies, starting heating and temperature rising, and setting the temperature of the heating furnace units from low to high from an inlet; then the vacuum pump assembly is started to completely pump out the air in the area to be vacuum, then inert protective gas is injected to set air pressure, the control system monitors the pressure of the inert gas in real time, and when the pressure is lower than the set value, the valve is automatically opened to continue to supplement the gas inwards;
(2) placing blanks on a special tray, then placing the blanks on an inlet conveyor, opening a first gate valve, simultaneously operating the inlet conveyor and a conveyor in an inlet exhaust bin, conveying the blanks together with the tray into the inlet exhaust bin, closing the first gate valve by a control system, closing two sides of the inlet exhaust bin by the first gate valve and a second gate valve at the moment to form a closed space, starting a vacuum pump, completely exhausting air in the inlet exhaust bin to vacuum, then opening the second gate valve, conveying the blanks into a first heating furnace unit by the conveyor, and closing the second gate valve after conveying the blanks to a set position;
(3) the transfer unit forks the blanks from the conveyor to rise, then the blanks are conveyed into the furnace tube in a translation mode, the fork arms of the transfer unit descend, the trays at the bottoms of the blanks are supported by the inner side wall of the furnace tube, the fork arms continue descending until the forks are completely separated from the blank trays, then the fork arms retract to the initial positions, the furnace doors are closed, and the blanks are heated in the heating furnace. After the set heating time is reached, taking out the blank from the furnace tube according to the reverse steps and placing the blank on a conveyor, and conveying the blank to the next heating furnace unit by the conveyor;
(4) the blank is gradually transferred from the low-temperature heating furnace unit to the high-temperature heating furnace unit to complete the whole blank heating process; when the first supporting blank enters the second group of heating furnace units, the second supporting blank repeats the steps (2) and (3), is conveyed to enter the first heating furnace unit, the subsequent blanks are sequentially and alternately circulated, the whole process is fully automatic, and continuous operation is realized;
(5) after the first support blank is heated, the first support blank is conveyed into the air cooling unit, and the blank is swept by cold air from the right above in the air cooling unit to be uniformly and quickly cooled;
(6) after the temperature reduction is finished, the third flashboard valve is opened, the blank with the support is conveyed into the outlet exhaust bin which is vacuumized in advance, then the third flashboard valve is closed, after the third flashboard valve is completely closed, the fourth flashboard valve is opened, the conveyor and the outlet conveyor in the outlet exhaust bin run simultaneously, the blank is conveyed out to the outlet, and the whole heat treatment process is finished;
(7) and (5) repeating the steps (2) to (6) on the subsequent blank, and continuously completing the whole heat treatment.
The technical idea of the invention is as follows: a plurality of heating furnaces are arranged in parallel, different temperatures from low to high are set in sequence, and then the plurality of heating furnaces are connected through a conveyor and a transfer mechanism to form a parallel production line. The blank sequentially enters different heating furnaces, the temperature is gradually raised, and finally air cooling is carried out.
Compared with the prior art, the technical scheme of the invention has the following beneficial effects:
(1) the heating furnace does not need to be cooled and heated repeatedly, and only needs to keep the temperature of the furnace constant, so that the energy consumption is greatly reduced; meanwhile, the blank gradually enters a plurality of heating furnaces with different temperatures, and because the temperature of the furnace is not required to be increased along with the furnace, the temperature of the furnace is already increased, the blank is increased more quickly, and the efficiency is higher;
(2) placing a small batch of blanks (6-10 Kg) on a tray in a single layer mode, blowing cold air from top to bottom, and enabling the blank cooling speed to be consistent; the problems of low internal cooling speed and high external cooling speed of a large batch of blanks arranged in multiple layers in the prior art do not exist;
(3) the automatic control technology is used, and the continuous heat treatment is realized by matching with the conveyor and the transfer mechanism without stopping the machine.
Drawings
FIG. 1 is a schematic view of a heat treatment apparatus according to the prior art;
FIG. 2 is a front view of a structure of a continuous multi-chamber heat treatment furnace of the present invention;
FIG. 3 is a top view of the structure of the continuous multi-chamber heat treatment furnace of the present invention;
FIG. 4 is an isometric view of the continuous multi-chamber heat treatment furnace configuration of the present invention-1;
FIG. 5 is an isometric view of the continuous multi-chamber heat treatment furnace of the present invention;
FIG. 6 is a front view showing the structure of a heating furnace unit of the present invention;
FIG. 7 is a plan view showing the structure of a heating furnace unit of the present invention;
FIG. 8 is an isometric view of the construction of a furnace unit of the present invention;
FIG. 9 is a front view of the transfer unit structure of the present invention;
FIG. 10 is a top view of the transfer unit structure of the present invention;
FIG. 11 is a left side view of the transfer unit structure of the present invention;
FIG. 12 is a front view of the air cooling unit structure of the present invention;
FIG. 13 is an isometric view of an air-cooled unit configuration of the present invention;
in the figure: 1. an inlet conveyor; 2. a first gate valve; 3. an inlet exhaust bin; 4. a vacuum pump; 5. a second gate valve; 6. a heating furnace unit; 601. a heating body; 602. a furnace tube; 603. a furnace gate valve; 604. a furnace door; 605. a transfer unit; 606. a unit bin body; 608. a yoke; 609. a horizontal rack; 610. a horizontal drive gear; 611. a guide wheel; 612. a lifting drive gear; 613. a lifting rack; 614. a lifting linear guide rail; 615. a lifting movable base; 616. a fork; 617. a horizontal driving motor; 618. a lifting drive motor; 7. a vacuum pump assembly; 8. a third gate valve; 9. an outlet exhaust bin; 10. a fourth gate valve; 11. an exit conveyor; 12. an air-cooling unit; 1201. sealing the bin body; 1202. an air supply duct; 1203. a fan; 1204. an air cooler; 13. a conveyor.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 2 to 5, the continuous multi-chamber heat treatment furnace of the present invention mainly comprises an inlet conveyor 1, an inlet exhaust bin 3, a vacuum pump 4, a plurality of heating furnace units 6, a vacuum pump assembly 7, an outlet exhaust bin 9, an outlet conveyor 11, an air cooling unit 12, and a control system.
A plurality of heating furnace units 6 are arranged in parallel to form a heating furnace assembly, a first gate valve 2 is connected between an inlet conveyor 1 and an inlet exhaust bin 3 in a flange sealing mode, and a second gate valve 5 is connected between the inlet exhaust bin 3 and the heating furnace units 6 in a flange sealing mode. The plurality of heating furnace units 6 are connected with each other by flange sealing. The air cooling unit 12 is connected with the last heating furnace unit 6 in a flange sealing mode, and a pipeline of the vacuum pump assembly 7 is connected to the side face of the main bin body of the air cooling unit 12. A third gate valve 8 is connected between the outlet exhaust bin 9 and the air cooling unit 12 in a flange sealing manner, and a fourth gate valve 10 is connected between the outlet conveyor 11 and the outlet exhaust bin 9 in a flange sealing manner. The pipelines of the two vacuum pumps 4 are respectively connected with the side surfaces of the inlet exhaust bin 3 and the outlet exhaust bin 9.
The inlet exhaust bin 3, the heating furnace unit 6, the outlet exhaust bin 9 and the main bin of the air cooling unit 12 are respectively provided with a conveyor 13 which can horizontally convey blanks from one side to the other side.
As shown in fig. 6-8, the heating furnace unit 6 mainly comprises a heating body 601, a furnace tube 602, a furnace gate valve 603, a furnace door 604, a transfer unit 605, and a unit cabin 606. The furnace tube 602 is inserted and placed in the heating body 601. One side of the furnace tube 602 is closed, the other side of the furnace tube is in flange sealing connection with a furnace gate valve 603, and the other side of the furnace gate valve 603 is in flange sealing connection with a unit bin body 606. Furnace gate valve 603 here functions as: when the heating body 601 or the furnace tube 602 is damaged, the furnace gate valve 603 can be closed, the connecting channel between the furnace tube 602 and the unit bin body 606 is cut off, the sealing of the bin body is continuously kept, and the inert protective gas in the system is prevented from leaking away, and air enters to cause the oxidation damage of blanks. Meanwhile, the damaged heating body or furnace tube can be immediately removed for replacement without stopping the system, so that the normal work of other heating furnace units is not influenced. The conveyor 13 is arranged in the unit bin 606, the conveyor 13 conveys the blanks to a transfer position from a front path unit, the fork arms 608 of the transfer unit 605 fork the blanks to be lifted and horizontally conveyed into the furnace tube 602, then the fork arms 608 descend, the tray at the bottom of the blanks is supported by the inner side wall of the furnace tube 602, the fork arms 608 continue to descend until the forks 616 of the fork arms are completely separated from the tray, then the fork arms 608 retract to the initial position, and the control system drives the motor to close the furnace door (the furnace door prevents excessive heat leakage in the furnace tube, so that the heat preservation and insulation effects are achieved).
As shown in fig. 9 to 11, the transfer unit 605 is composed of a fork arm 608, a horizontal rack 609, a horizontal drive gear 610, a guide wheel 611, a vertical movement drive gear 612, a vertical movement rack 613, a vertical movement linear guide 614, a vertical movement base 615, a fork 616, a horizontal drive motor 617, a vertical movement drive motor 618, and the like. A horizontal rack gear 609 is fixed above the fork arm 608, and a horizontal driving motor 617 rotates a horizontal driving gear 610, and the horizontal driving gear 610 is engaged with the horizontal rack gear 609, thereby driving the fork arm 608 to extend and retract horizontally. The yoke 608 is guided by 8 guide wheels 611 on four sides, up and down and right and left, two guide wheels per side 2, ensuring that the yoke 608 can only move horizontally. The guide wheel 611 is fixed to a movable elevation base 615. The two sides of the lifting movable base 615 are fixed with a lifting linear guide rail 614 in the vertical direction, and are also fixed with a bearing seat 620, and a driving shaft 619 is sleeved on the bearing seat. Two lifting driving gears 612 are fixed on a driving shaft 619 on two sides of the bearing seat, the driving shaft is directly connected with a lifting driving motor 618 through a coupler, the lifting driving motor 618 rotates to drive the lifting driving gears 612 to rotate, and the lifting driving gears 612 are meshed with lifting racks 613 fixed on a lifting movable base 615, so that the lifting movable base 615 and a translation mechanism fixed on the lifting movable base 615 ascend and descend together.
As shown in fig. 12-13, the air cooling unit 12 includes a sealed cabin 1201, a fan 1203, an air cooler 1204 and an air supply duct 1202, a conveyor 13 is disposed in the sealed cabin 1201, the fan 1203, the air cooler 1204 and the air supply duct 1202 are sequentially connected to form a sealed circulation loop, and the vacuum pump assembly 7 is connected to the sealed cabin 1201 through a pipeline.
The continuous multi-chamber heat treatment furnace of the invention comprises the following equipment working steps:
(1) starting the equipment, wherein the control system controls the second gate valve 5 and the third gate valve 8 to be closed, seals the middle heating furnace assembly area, synchronously starts the power supply of the plurality of heating furnace units 6, starts heating and temperature rise, and sets the temperature of the heating furnace units 6 from low to high from an inlet; then the vacuum pump assembly 7 is started to pump all the air in the area to be vacuum, then inert protective gas is injected to set air pressure, the control system monitors the pressure of the inert gas in real time, and when the pressure is lower than the set value, the valve is automatically opened to continue to supplement the gas inwards;
(2) placing blanks on a special tray, then placing the blanks on an inlet conveyor 1, opening a first gate valve 2, simultaneously operating the inlet conveyor 1 and a conveyor 13 in an inlet exhaust bin 3, conveying the blanks and the tray into the inlet exhaust bin 3, closing the first gate valve 2 by a control system, closing two sides of the inlet exhaust bin 3 by the first gate valve 2 and a second gate valve 5 to form a closed space, starting a vacuum pump 4, completely discharging all air in the inlet exhaust bin 3 to vacuum, then opening the second gate valve 5, conveying the blanks into a first heating furnace unit 6 by the conveyor 13, conveying the blanks into a set position, and then closing the second gate valve 5;
(3) the transfer unit 605 forks the blank from the conveyor 13 to ascend, then horizontally transfers the blank into the furnace tube 602, the fork arm 608 of the transfer unit 605 descends, the tray at the bottom of the blank is supported by the inner side wall of the furnace tube 602, the fork arm 608 descends continuously until the fork 616 is completely separated from the blank tray, then the fork arm 608 retracts to the initial position, the furnace door 604 is closed, the blank is heated in the heating furnace, after the set heating time is reached, the blank is taken out from the furnace tube 602 and placed on the conveyor 13 according to the reverse steps, and the conveyor conveys the blank to the next heating furnace unit 6;
(4) the blank is gradually transferred from the low-temperature heating furnace unit 6 to the high-temperature heating furnace unit 6, and the whole temperature rise process of the blank is completed; when the first support blank enters the second group of heating furnace units 6, the second support blank repeats the steps (2) and (3), is conveyed into the first heating furnace unit 6, the subsequent blanks are sequentially and alternately circulated, the whole process is fully automatic, and continuous operation is realized;
(5) after the first support blank is heated, the first support blank is conveyed into the air cooling unit 12, and the blank is swept by cold air from the right above in the air cooling unit 12 to be uniformly and quickly cooled;
(6) after the temperature reduction is finished, the third gate valve 8 is opened, the blank with the support is conveyed into the outlet exhaust bin 9 which is vacuumized in advance, then the third gate valve 8 is closed, after the third gate valve 8 is completely closed, the fourth gate valve 10 is opened, the conveyor 13 and the outlet conveyor 11 in the outlet exhaust bin run simultaneously, the blank is conveyed out to the outlet, and the whole heat treatment process is finished;
(7) and (5) repeating the steps (2) to (6) on the subsequent blank, and continuously completing the whole heat treatment.
Claims (10)
1. The utility model provides a multi-chambered heat treatment furnace, its characterized in that includes the heating furnace subassembly of constituteing by a plurality of heating furnace unit (6) of arranging in parallel, and the feed end of heating furnace subassembly is connected with import exhaust bin (3), and import exhaust bin (3) link to each other with import conveyer (1), and the discharge end of heating furnace subassembly has connected gradually forced air cooling unit (12) and export exhaust bin (9), and export exhaust bin (9) link to each other with export conveyer (11), there are vacuum pump (4) in import exhaust bin (3) and export exhaust bin (9) pipe connection respectively, and forced air cooling unit (12) link to each other with vacuum pump subassembly (7), multi-chambered heat treatment furnace still includes control system.
2. A multi-chambered heat treating furnace according to claim 1, wherein a first gate valve (2) is connected between the inlet conveyor (1) and the inlet exhaust bin (3) in a flange-tight manner, a second gate valve (5) is connected between the inlet exhaust bin (3) and the heating furnace assembly in a flange-tight manner, the heating furnace units (6) and the last heating furnace unit (6) and the air-cooling unit (12) are sealed by flanges, a third gate valve (8) is connected between the air-cooling unit (12) and the outlet exhaust bin (9), and a fourth gate valve (10) is connected between the outlet exhaust bin (9) and the outlet conveyor (11).
3. The multi-chamber heat treatment furnace according to claim 1, wherein a conveyor (13) for conveying the material is provided in the main chamber of the inlet exhaust chamber (3), the heating furnace unit (6), the outlet exhaust chamber (9), and the air cooling unit (12), and a transfer unit (605) for transferring the material on the conveyor (13) to a furnace tube (602) of the heating furnace unit (6) is further provided in the heating furnace unit (6).
4. The multi-chamber heat treatment furnace according to claim 1, wherein the heating furnace unit (6) comprises a heating body (601), a furnace tube (602), a furnace gate valve (603), a furnace door (604), a transfer unit (605) and a unit chamber body (606), the furnace tube (602) is arranged in the heating body (601), one side of the furnace tube (602) is closed, the other side of the furnace tube (603) is in flange sealing connection with the furnace gate valve (603), the other side of the furnace gate valve (603) is in flange sealing connection with the unit chamber body (606), a conveyor (13) and a transfer unit (605) are arranged in the unit chamber body (606), the furnace door (604) is arranged on one side of the unit chamber body (606) close to the heating body (601), and each heating furnace unit (6) is fixedly communicated with the unit chamber body (606).
5. A multi-chamber heat treatment furnace according to claim 4, characterized in that said transfer unit (605) comprises a fork arm (608), a horizontal movement assembly, a lifting movement assembly, a fork (616) being connected to the fork arm (608) for moving the product-carrying tray, the horizontal movement assembly and the lifting movement assembly being adapted to control the movement of the fork arm (608) in the horizontal and vertical directions.
6. A multi-chamber heat treatment furnace according to claim 5, wherein said horizontal moving assembly comprises a horizontal rack gear (609), a horizontal driving gear (610), a guide wheel (611) and a horizontal driving motor (617), the horizontal rack gear (609) is fixed above the fork arm (608), the horizontal driving gear (610) is engaged with the horizontal rack gear (609), and the horizontal driving motor (617) is connected with the horizontal driving gear (610) to control the horizontal extension and retraction of the fork arm (608).
7. A multi-chamber heat treatment furnace according to claim 6, wherein guide wheels (611) are provided up and down and right and left of the yoke (608) for guiding to ensure the horizontal movement of the yoke, and the guide wheels are fixed to the movable elevating base (615).
8. The multi-chamber heat treatment furnace according to claim 5, wherein the lifting moving assembly comprises a lifting driving gear (612), a lifting rack (613), a lifting linear guide (614), a lifting movable base (615) and a lifting driving motor (618), the lifting driving gear (612) is engaged with the lifting rack (613) fixed on the lifting movable base (615), the lifting linear guide (614) is arranged on two sides of the lifting movable base (615) and a bearing seat (620) is fixed, a driving shaft (619) is sleeved on the bearing seat (620), the lifting driving gear (612) is fixed on the driving shaft (619), and the driving shaft (619) is connected with the lifting driving motor (618).
9. The continuous multi-chamber heat treatment furnace according to claim 1, wherein the air cooling unit (12) comprises a sealed bin body (1201), a fan (1203), an air cooler (1204) and an air supply pipeline (1202), a conveyor (13) is arranged in the sealed bin body (1201), the fan (1203), the air cooler (1204) and the air supply pipeline (1202) are sequentially connected to form a sealed circulation loop, and the vacuum pump assembly (7) is connected with the sealed bin body (1201) through a pipeline.
10. A process for treating a continuous multi-chamber heat treatment furnace using the multi-chamber heat treatment furnace according to any one of claims 5 to 9, comprising the process steps of:
(1) starting the equipment, wherein the control system controls the second gate valve (5) and the third gate valve (8) to be closed, seals the middle heating furnace assembly area, synchronously turns on the power supplies of the plurality of heating furnace units (6), starts heating and temperature rise, and sets the temperature of the heating furnace units (6) from low to high from an inlet; then a vacuum pump assembly (7) is started, air in the area is completely pumped to be vacuum, then inert protective gas is injected to set air pressure, a control system monitors the pressure of the inert gas in real time, a valve is automatically opened when the pressure is lower than a set value, and gas is continuously supplemented inwards;
(2) placing blanks on a special tray, then placing the blanks on an inlet conveyor (1), opening a first gate valve (2), simultaneously operating the inlet conveyor (1) and a conveyor (13) in an inlet exhaust bin (3), conveying the blanks and the tray into the inlet exhaust bin (3), closing the first gate valve (2) by a control system, closing the two sides of the inlet exhaust bin (3) by the first gate valve (2) and a second gate valve (5) to form a closed space, starting a vacuum pump (4), completely exhausting air in the inlet exhaust bin (3) to vacuum, then opening the second gate valve (5), conveying the blanks into a first heating furnace unit (6) by the conveyor (13), and after conveying the blanks to a set position, closing the second gate valve (5);
(3) the blank is lifted up from the conveyor (13) by the transfer unit (605), then is conveyed into the furnace tube (602) in a translation mode, a fork arm (608) of the transfer unit (605) descends, a tray at the bottom of the blank is held by the inner side wall of the furnace tube (602), the fork arm (608) continues descending until a fork (616) is completely separated from the blank tray, then the fork arm (608) retracts to the initial position, the furnace door (604) is closed, the blank is heated in the heating furnace, after the set heating time is reached, the blank is taken out from the furnace tube (602) and is placed on the conveyor (13) according to the reverse steps, and the conveyor conveys the blank to the next heating furnace unit (6);
(4) the blank is gradually transferred from the low-temperature heating furnace unit (6) to the high-temperature heating furnace unit (6) to complete the whole blank heating process; when the first supporting blank enters the second group of heating furnace units (6), the second supporting blank repeats the steps (2) and (3), the second supporting blank is conveyed to enter the first heating furnace unit (6), the subsequent blanks are sequentially and alternately circulated, the whole process is full-automatic, and continuous operation is realized;
(5) after the first support blank is heated, the first support blank is conveyed into the air cooling unit (12), and the blank is swept by cold air from the right above in the air cooling unit (12) to be uniformly and rapidly cooled;
(6) after the temperature reduction is finished, the third gate valve (8) is opened, the blank with the support is conveyed into an outlet exhaust bin (9) which is vacuumized in advance, then the third gate valve (8) is closed, after the third gate valve (8) is completely closed, the fourth gate valve (10) is opened, a conveyor (13) and an outlet conveyor (11) in the outlet exhaust bin operate simultaneously, the blank is conveyed out to an outlet, and the whole heat treatment process is finished;
(7) and (5) repeating the steps (2) to (6) on the subsequent blank, and continuously completing the whole heat treatment.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2848868Y (en) * | 2005-10-27 | 2006-12-20 | 李积回 | Multichamber vacuum heat treatment furnace |
| KR101627503B1 (en) * | 2015-02-11 | 2016-06-07 | 주식회사 썸백 | Transfer Unit For High Temperature And Vacuum Heat Treatment Furnace |
| US20160223259A1 (en) * | 2015-02-04 | 2016-08-04 | Seco/Warwick S.A. | Multi-chamber furnace for vacuum carburizing and quenching of gears, shafts, rings and similar workpieces |
| CN110421161A (en) * | 2019-07-16 | 2019-11-08 | 宁波宁港永磁材料有限公司 | A kind of multi chamber vacuum continuous oven for the preparation of samarium cobalt permanent magnet body |
| CN113776336A (en) * | 2021-09-28 | 2021-12-10 | 东风汽车有限公司东风日产乘用车公司 | Heating furnace and heating furnace system |
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- 2022-05-31 CN CN202210604690.6A patent/CN114807570B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2848868Y (en) * | 2005-10-27 | 2006-12-20 | 李积回 | Multichamber vacuum heat treatment furnace |
| US20160223259A1 (en) * | 2015-02-04 | 2016-08-04 | Seco/Warwick S.A. | Multi-chamber furnace for vacuum carburizing and quenching of gears, shafts, rings and similar workpieces |
| KR101627503B1 (en) * | 2015-02-11 | 2016-06-07 | 주식회사 썸백 | Transfer Unit For High Temperature And Vacuum Heat Treatment Furnace |
| CN110421161A (en) * | 2019-07-16 | 2019-11-08 | 宁波宁港永磁材料有限公司 | A kind of multi chamber vacuum continuous oven for the preparation of samarium cobalt permanent magnet body |
| CN113776336A (en) * | 2021-09-28 | 2021-12-10 | 东风汽车有限公司东风日产乘用车公司 | Heating furnace and heating furnace system |
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