CN105039665A - Closed type heat treatment quenching equipment with oil fume purification function - Google Patents
Closed type heat treatment quenching equipment with oil fume purification function Download PDFInfo
- Publication number
- CN105039665A CN105039665A CN201510572864.5A CN201510572864A CN105039665A CN 105039665 A CN105039665 A CN 105039665A CN 201510572864 A CN201510572864 A CN 201510572864A CN 105039665 A CN105039665 A CN 105039665A
- Authority
- CN
- China
- Prior art keywords
- quenching
- guide rail
- cell body
- lifting table
- smoke
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
The invention discloses closed type heat treatment quenching equipment with an oil fume purification function. The equipment comprises a quenching tank body provided with a cooling system, a guide rail vertically installed in the quenching tank body, a quenching lifting table located in a tank cavity formed in the front portion of the guide rail and a medium stirring device located in a tank cavity formed in the back portion of the guide rail; the quenching lifting table is combined with the guide rail through rolling wheels arranged on the two sides, a lifting driving device is installed on a platform located at the top of the guide rail, one end of a chain driven by the lifting driving device is connected with the quenching lifting table, and the other end of the chain is connected with a balance weight object; a follow-up fume collecting hood is arranged at an opening of a cover plate of the quenching tank body, a movable pulley is arranged on the follow-up fume collecting hood, and the tail end of a traction steel wire rope wound around the movable pulley vertically downwards penetrates through a lug seat arranged on one side of the balance weight object and then is combined with a hanging block; an oil fume accumulation cavity in the upper middle portion of the quenching tank body is communicated with an oil fume purification machine through a fume exhaust pipeline. The closed type heat treatment quenching equipment with the oil fume purification function achieves the purposes of collecting and purifying a large amount of oil fume in the quenching process.
Description
Technical field
The present invention relates to a kind of heat treatment quenching equipment of closed band fume purifying function, is exactly specifically that one is applicable to and pit furnace, car type furnace, the matching used heat-treatment quenching of periodic heat treatment furnace and fume purifier of fume.
Background technology
Quenching is heat treated important process process.In quenching process, first workpiece is heated in heat treatment furnace, then heated work pieces is shifted out from stove and enters quenching apparatus, in dip quench oil.Enter at workpiece in the process of oil, quenching oil vigorous combustion and evaporation, can produce a large amount of flue gases, pollute environment, the health of infringement worker.
Summary of the invention
The heat treatment quenching equipment of a kind of closed band fume purifying function that the present invention provides for above-mentioned the deficiencies in the prior art part just, this device had both solved the collection problem of a large amount of oil smoke produced in quenching process, solved again the purifying problem of oil smoke after collecting.
Object of the present invention realizes by following technique measures:
The heat treatment quenching equipment of closed band fume purifying function of the present invention comprises the quenching cell body being provided with cooling system, vertically be arranged on quenching cell body in and upper end extend to quenching cell body above guide rail, and be positioned at the quenching lifting table of guide rail front portion quenching cell body vallecular cavity, be positioned at the medium whipping appts of guide rail rear portion quenching cell body vallecular cavity; Described quenching lifting table is combined with the guide rail vertically arranged by the roller being arranged on dual-side, rail crown platform is arranged on along the lifting drive that guide rail moves up and down for driving quenching lifting table, the one end of the chain driven by the step-down gear of lifting drive is connected with quenching lifting table, and the other end is connected with mass; At the opening part of quenching cell body upper cover plate, hinged mode is provided with servo-actuated smoke collection cover, servo-actuated smoke collection cover is provided with travelling block, is combined with hanging block after the ear seat after the haulage cable end installed around on travelling block walks around the front and back support pulley be arranged on rail crown platform successively, straight down through the setting of mass side; The oil smoke accumulation cavity of described quenching cell body middle and upper part is connected with smoke purifier by smoke discharging pipe.
The control device of the lifting drive described in the present invention is made up of jointly hand-operated clutch device and electric-controlled engaging and disengaging gear.
More specifically, the quenching cell body described in the present invention is welded by steel plate and shaped steel, and its top and pasta leave certain space, meet the requirement of workpiece height, thus realize before workpiece enters oil, the totally enclosed quenching that servo-actuated smoke collection cover has closed.Liftable quenching lifting table is welded by steel plate and shaped steel, there is four rolling on lifting table both sides, can roll along lifting rail, the sprocket wheel that lifting drive is driven by motor, step-down gear and chain are formed, and chain one end is connected with quenching lifting table, and the other end is connected with mass, thus realize the rising of quenching lifting table, mass declines, and quenching lifting table declines, the link gear that mass rises.Servo-actuated smoke collection cover is the welding structural element of similar cover plate, is connected with quenching cell body upper cover plate by hinge, can opening and closing; The opening and closing principle of described servo-actuated smoke collection cover is as follows: when the lifting table that quenches rises along guide rail to quenching cell body notch under lifting drive drives, because chain one end is connected with quenching lifting table, one end is connected with mass, when the lifting table that quenches rises, mass declines, when mass drop to the ear seat that mass welds contact with hanging block time, mass drives hanging block to decline together, and then drive the haulage cable be connected with hanging block descending, and pull travelling block that servo-actuated smoke collection cover is opened by haulage cable, complete unlatching linkage process.
Otherwise, when the lifting table that quenches declines along guide rail under lifting drive drives, mass rises, and hanging block also rises under the action of gravity of servo-actuated smoke collection cover thereupon, when the lifting table that quenches drops to bottom dead center position, servo-actuated smoke collection cover is closed under gravity, completes closedown linkage process.Thus realize servo-actuated smoke collection cover and follow quenching lifting table and rise and open, decline with quenching lifting table and the function of closing, final realization is quenched into quenching totally enclosed during oil.The lowering speed of quenching lifting table, higher than common crane, shortens the time that workpiece enters oil, decreases fume pollution.If when running into the emergency state (as having a power failure), can pull the handle of hand-operated clutch device, quenching lifting gantry is reliably conducted oneself with dignity and is fallen quenching, can avoid the generation of fire.
The present invention is provided with at quenching cell body inner tank mouths place the rare gas element spray orifice be connected with inertia source of the gas for fp, and when the intensity of a fire of quenching is too large, can spray rare gas element near groove inner tank mouths, the contact of isolated pasta and air, prevents fire from occurring.
The one end of smoke purifier described in the present invention is by the intracavity inter-connection of fire resisting damper, smoke discharging pipe and quenching cell body, and the other end is connected with smoke exhaust fan by fire resisting damper, and is provided with spark arrester on smoke discharging pipe; Described spark arrester can stop naked light to enter in pipeline, and the effect of fire resisting damper is that fire resisting damper closes automatically when ducted flue-gas temperature exceedes certain temperature, is hedged off from the outer world by ducted flue gas, stops fire and occurs, reach the object of safety in production.
Working process of the present invention is as follows:
During hardening step, first by electric control system controls, medium whipping appts is opened, make oil temperature even, workpiece hanging in stove is delivered on quenching platform by crane, start lifting gantry decline button in electrical control cubicles, quenching platform declines, servo-actuated smoke collection cover falls with quenching platform, when workpiece does not also contact pasta, servo-actuated smoke collection cover is closed completely, open smoke purifier simultaneously, now workpiece enters oil quenching, a large amount of flue gases that quenching oil vigorous combustion produces pass through in smoke discharging pipe suction clearing machine by the blower fan system of smoke purifier in complete totally enclosed space, discharge after gas cleaning.Quench complete, by the raise button of quenching lifting table, quenching lifting gantry rises, and servo-actuated smoke collection cover is opened with the rising of quenching lifting table, and workpiece can be hung away by crane, completes whole quenching process.
Beneficial effect of the present invention is as follows:
1. the lifting table that quenches coordinates with servo-actuated smoke collection cover; before workpiece enters oil, servo-actuated smoke collection cover can be closed completely; realize the totally-enclosed quenching of workpiece thus; by the oil smoke under full closeding state by blower fan suction smoke purifier; by discharging after purifying treatment; contrast is direct traditional method quenching oil smoke being discharged into workshop at present, and significantly can reduce environmental pollution, protection worker's is healthy.
2. workpiece is placed on quenching lifting table namely removable by crane, and whole quenching process does not take crane, is conducive to enhancing productivity.
3. hand-operated clutch device when quenching device is provided with the emergency state (as have a power failure), can avoid the generation of fire, improve security.
4. the heat treatment quenching equipment of closed band fume purifying function of the present invention, applies closed quench systems, security measures such as spray rare gas element, manual clutch, fire resisting damper, spark arrester etc., can the safety of effective guarantee device fabrication.
Accompanying drawing explanation
Fig. 1 is structure principle chart of the present invention.
Sequence number in figure: 1 is servo-actuated smoke collection cover, 2 is quenching cell bodies, and 3 is rare gas element spray orifices, 4 is quenching lifting tables, and 5 is guiding devices, and 6 is lifting drives, 7 is hand-operated clutch devices, and 8 is mass, and 9 is medium whipping apptss, 10 is cooling systems, and 11 is spark arresters, and 12 is smoke discharging pipes, 13 is fire resisting dampers, 14 is smoke purifiers, and 15 is fire resisting dampers, and 16 is smoke exhaust fans.
Fig. 2 is the vertical view (removing the vertical view after smoke discharging pipe, smoke purifier) of Fig. 1.
Fig. 3 is the partial enlarged drawing of Fig. 1.
Sequence number in figure: 17 is travelling block, 18 is hinges, and 19 is haulage cables, and 20 is sprocket wheels, and 21 is support pulley, and 22 is chains, and 23 is ear seats, and 24 is hanging blocks, and 25 is guide rails.
Embodiment
The present invention is further described below with reference to embodiment (accompanying drawing):
As shown in Figure 1, 2, 3, the heat treatment quenching equipment of closed band fume purifying function of the present invention comprises the quenching cell body 2 being provided with cooling system 10, vertically be arranged in quenching cell body 2 and upper end and extend to guide rail 25 above quenching cell body 2, and be positioned at the quenching lifting table 4 of guide rail front portion quenching cell body vallecular cavity, be positioned at the medium whipping appts 9 of guide rail rear portion quenching cell body vallecular cavity; Described quenching lifting table 4 is combined with the guide rail 25 vertically arranged by the roller being arranged on dual-side, lifting drive 6 for driving quenching lifting table 4 to move up and down along guide rail is arranged on rail crown platform, the one end of the chain 22 driven by the step-down gear sprocket wheel 20 of lifting drive 6 is connected with quenching lifting table 4, and the other end is connected with mass 8; At the opening part of quenching cell body 2 upper cover plate, hinge 18 is provided with servo-actuated smoke collection cover 1, servo-actuated smoke collection cover 1 is provided with travelling block 17, is combined with hanging block 24 after the ear seat 23 after haulage cable 19 end installed around on travelling block 17 walks around the front and back support pulley 21 be arranged on rail crown platform successively, straight down through the setting of mass side; The oil smoke accumulation cavity of described quenching cell body 2 middle and upper part is connected with smoke purifier 14 by smoke discharging pipe 12.
The control device of the lifting drive 6 described in the present invention is made up of jointly hand-operated clutch device 7 and electric-controlled engaging and disengaging gear.
More specifically, the quenching cell body 2 described in the present invention is welded by steel plate and shaped steel, and its top and pasta leave certain space, meet the requirement of workpiece height, thus realize before workpiece enters oil, the totally enclosed quenching that servo-actuated smoke collection cover 1 has closed.Liftable quenching lifting table 4 is welded by steel plate and shaped steel, there is four rolling on lifting table both sides, can be elevated along guide rail 25 and roll, the sprocket wheel 20 that lifting drive 6 is driven by motor, step-down gear and chain 22 are formed, and chain one end is connected with quenching lifting table 4, and the other end is connected with mass 8, thus realization quenching lifting table 4 rises, mass 8 declines, and quenching lifting table 4 declines, the link gear that mass 8 rises.Servo-actuated smoke collection cover 1 is the welding structural element of similar cover plate, is connected with quenching cell body 2 upper cover plate by hinge 18, can opening and closing, the opening and closing principle of described servo-actuated smoke collection cover 1 is as follows: when the lifting table 4 that quenches rises along guide rail 25 to quenching cell body notch under lifting drive 6 drives, because chain 22 one end is connected with quenching lifting table 4, one end is connected with mass 8, when the lifting table 4 that quenches rises, mass 8 declines, when mass 8 drop to the ear seat 23 that mass welds contact with hanging block 24 time, mass 8 drives hanging block 24 to decline together, and then drive the haulage cable 19 be connected with hanging block 24 descending, and pull travelling block 17 that servo-actuated smoke collection cover 1 is opened by haulage cable 19, complete unlatching linkage process.
Otherwise, when the lifting table 4 that quenches declines along guide rail 25 under lifting drive 6 drives, mass 8 rises, hanging block 24 also rises under the action of gravity of servo-actuated smoke collection cover 1 thereupon, when the lifting table 4 that quenches drops to bottom dead center position, servo-actuated smoke collection cover 1 is closed under gravity, completes closedown linkage process.Thus realize servo-actuated smoke collection cover 1 and follow quenching lifting table 4 and rise and open, decline with quenching lifting table 4 and the function of closing, final realization is quenched into quenching totally enclosed during oil.The lowering speed of quenching lifting table 4, higher than common crane, shortens the time that workpiece enters oil, decreases fume pollution.If when running into the emergency state (as having a power failure), can pull the handle of hand-operated clutch device 7, quenching lifting gantry 4 reliably deadweight falls quenching, can avoid the generation of fire.
The present invention is provided with at quenching cell body 2 inner tank mouths place the rare gas element spray orifice 3 be connected with inertia source of the gas for fp, and when the intensity of a fire of quenching is too large, can spray rare gas element near groove inner tank mouths, the contact of isolated pasta and air, prevents fire from occurring.
The one end of smoke purifier 14 described in the present invention is by the intracavity inter-connection of fire resisting damper 13, smoke discharging pipe 12 and quenching cell body, and the other end is connected with smoke exhaust fan 16 by fire resisting damper 15, and is provided with spark arrester 11 on smoke discharging pipe 12; Described spark arrester can stop naked light to enter in pipeline, and the effect of fire resisting damper is that fire resisting damper closes automatically when ducted flue-gas temperature exceedes certain temperature, is hedged off from the outer world by ducted flue gas, stops fire and occurs, reach the object of safety in production.
Specific works process of the present invention is as follows:
During hardening step, first by electric control system controls, medium whipping appts 9 is opened, even oil temperature, workpiece hanging in stove is delivered on quenching lifting table 4 by crane, the quenching lifting table 4 started in electrical control cubicles declines button, quenching lifting table 4 declines, servo-actuated smoke collection cover 1 falls with quenching lifting table 4, when workpiece does not also contact pasta, servo-actuated smoke collection cover 1 is closed completely and is opened smoke purifier 14, now workpiece enters oil quenching, a large amount of flue gases that quenching oil vigorous combustion produces pass through in smoke discharging pipe 12 suction smoke purifier 14 by the smoke exhaust fan 16 of smoke purifier in complete totally enclosed space, directly discharge after gas cleaning.Quench complete, by the raise button of quenching lifting table 4, quenching lifting table 4 rises, and servo-actuated smoke collection cover 1 rises with quenching lifting table 4 and opens, and workpiece can be hung away by crane, completes whole quenching process.
If oil temperature has exceeded the temperature of setting, cooling system 10 can be opened and cooled.In above-mentioned quenching process, if when running into the emergency state (as having a power failure), can pull the handle of manual clutch quenching device 7, quenching lifting table 4 reliably deadweight falls quenching, can avoid the generation of fire.
Claims (4)
1. the heat treatment quenching equipment of a closed band fume purifying function, it is characterized in that: it comprises the quenching cell body (2) being provided with cooling system (10), vertically be arranged on the guide rail (25) that in quenching cell body (2) and upper end extends to quenching cell body (2) top, and be positioned at the quenching lifting table (4) of guide rail front portion quenching cell body vallecular cavity, be positioned at the medium whipping appts (9) of guide rail rear portion quenching cell body vallecular cavity; Described quenching lifting table (4) is combined with the guide rail vertically arranged by the roller being arranged on dual-side, lifting drive (6) for driving quenching lifting table (4) to move up and down along guide rail is arranged on rail crown platform, the one end of the chain (22) driven by the step-down gear of lifting drive (6) is connected with quenching lifting table (4), and the other end is connected with mass (8); At the opening part of quenching cell body (2) upper cover plate, hinged mode is provided with servo-actuated smoke collection cover (1), servo-actuated smoke collection cover (1) is provided with travelling block (17), combines with hanging block (24) afterwards through the ear seat (23) of mass side setting after haulage cable (19) end installed around on travelling block (17) walks around front and back support pulley (21) be arranged on rail crown platform successively, straight down; The oil smoke accumulation cavity of described quenching cell body (2) middle and upper part is connected with smoke purifier (14) by smoke discharging pipe (12).
2. the heat treatment quenching equipment of closed band fume purifying function according to claim 1, is characterized in that: the control device of described lifting drive (6) is made up of jointly hand-operated clutch device (7) and electric-controlled engaging and disengaging gear.
3. the heat treatment quenching equipment of closed band fume purifying function according to claim 1, is characterized in that: quenching cell body (2) inner tank mouths place is provided with the rare gas element spray orifice (3) be connected with inertia source of the gas for fp.
4. the heat treatment quenching equipment of closed band fume purifying function according to claim 1, it is characterized in that: described smoke purifier (14) one end is by the intracavity inter-connection of fire resisting damper (13), smoke discharging pipe (12) and quenching cell body, the other end is connected with smoke exhaust fan (16) by fire resisting damper (15), and is provided with spark arrester (11) on smoke discharging pipe (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510572864.5A CN105039665A (en) | 2015-09-10 | 2015-09-10 | Closed type heat treatment quenching equipment with oil fume purification function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510572864.5A CN105039665A (en) | 2015-09-10 | 2015-09-10 | Closed type heat treatment quenching equipment with oil fume purification function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105039665A true CN105039665A (en) | 2015-11-11 |
Family
ID=54446632
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510572864.5A Pending CN105039665A (en) | 2015-09-10 | 2015-09-10 | Closed type heat treatment quenching equipment with oil fume purification function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105039665A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108636977A (en) * | 2018-06-05 | 2018-10-12 | 郑州大学 | A kind of wind curtain type closed cap collection air purifying apparatus and method |
| CN110079649A (en) * | 2019-03-11 | 2019-08-02 | 苏州金言来新材料科技有限公司 | A kind of heat treating oil fume treating device |
| CN111254262A (en) * | 2020-03-31 | 2020-06-09 | 北京机电研究所有限公司 | High-performance quenching system suitable for vacuum oil quenching furnace |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2156191Y (en) * | 1992-07-04 | 1994-02-16 | 机械电子工业部郑州机械研究所 | Multi-function quench oil trough |
| CN201437546U (en) * | 2009-06-09 | 2010-04-14 | 天龙科技炉业(无锡)有限公司 | Smoke collecting and exhausting device of quenching bath |
| CN202315027U (en) * | 2011-11-22 | 2012-07-11 | 郑州机械研究所 | Fire fighting device suitable for thermal treatment of oil-smoke purification device |
| CN103014268A (en) * | 2012-12-01 | 2013-04-03 | 徐州竞舟电子科技有限公司 | Smoke removing and fire extinguishing device for oil quenching tank |
| CN203112882U (en) * | 2013-03-18 | 2013-08-07 | 杭州萧山众汇工业电炉厂 | Fast quenching oil slot |
| CN203999705U (en) * | 2014-08-11 | 2014-12-10 | 长春一汽嘉信热处理科技有限公司 | Single station translation quenching mechanism |
| CN204981973U (en) * | 2015-09-10 | 2016-01-20 | 郑州机械研究所 | Closed thermal treatment quenching equipment of taking oil smoke purification performance |
-
2015
- 2015-09-10 CN CN201510572864.5A patent/CN105039665A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2156191Y (en) * | 1992-07-04 | 1994-02-16 | 机械电子工业部郑州机械研究所 | Multi-function quench oil trough |
| CN201437546U (en) * | 2009-06-09 | 2010-04-14 | 天龙科技炉业(无锡)有限公司 | Smoke collecting and exhausting device of quenching bath |
| CN202315027U (en) * | 2011-11-22 | 2012-07-11 | 郑州机械研究所 | Fire fighting device suitable for thermal treatment of oil-smoke purification device |
| CN103014268A (en) * | 2012-12-01 | 2013-04-03 | 徐州竞舟电子科技有限公司 | Smoke removing and fire extinguishing device for oil quenching tank |
| CN203112882U (en) * | 2013-03-18 | 2013-08-07 | 杭州萧山众汇工业电炉厂 | Fast quenching oil slot |
| CN203999705U (en) * | 2014-08-11 | 2014-12-10 | 长春一汽嘉信热处理科技有限公司 | Single station translation quenching mechanism |
| CN204981973U (en) * | 2015-09-10 | 2016-01-20 | 郑州机械研究所 | Closed thermal treatment quenching equipment of taking oil smoke purification performance |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108636977A (en) * | 2018-06-05 | 2018-10-12 | 郑州大学 | A kind of wind curtain type closed cap collection air purifying apparatus and method |
| CN108636977B (en) * | 2018-06-05 | 2024-01-30 | 郑州大学 | Air curtain type closed cover gas collection and purification device |
| CN110079649A (en) * | 2019-03-11 | 2019-08-02 | 苏州金言来新材料科技有限公司 | A kind of heat treating oil fume treating device |
| CN111254262A (en) * | 2020-03-31 | 2020-06-09 | 北京机电研究所有限公司 | High-performance quenching system suitable for vacuum oil quenching furnace |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105039665A (en) | Closed type heat treatment quenching equipment with oil fume purification function | |
| CN206089744U (en) | Car -type tempering furnace | |
| CN204981973U (en) | Closed thermal treatment quenching equipment of taking oil smoke purification performance | |
| CN202610266U (en) | Fuel gas type aluminum alloy hardening furnace | |
| CN104312596A (en) | Tamping coke oven U-shaped pipe smoke-guide trolley with mobile smoke guide pipe and application method of smoke-guide trolley | |
| CN105617943A (en) | Large-volume vacuum cracking furnace | |
| CN111593195A (en) | High-efficient natural gas annealing stove of oriented silicon steel | |
| CN108636977B (en) | Air curtain type closed cover gas collection and purification device | |
| CN100412163C (en) | Side big gate sealing device for side-mounted stamp-charging coke oven | |
| CN109825684A (en) | High-speed rail steering arm large component quenching bath oil smoke recycling and processing device | |
| CN213713922U (en) | High-melting-efficiency low-loss melting furnace | |
| CN213357654U (en) | Quenching furnace with flow function | |
| CN205907297U (en) | Threaded fastener heat treatment device | |
| CN213475870U (en) | Automatic coke pot capping device | |
| CN111876566A (en) | Smoke and dust device is collected in putting out a fire | |
| CN209226909U (en) | A kind of preposition flue switch device of coke oven flue gas pollutant disposal system | |
| CN206068752U (en) | The double protection chain type metallurgy conveying equipments of intelligent high temperature resistant | |
| CN218262658U (en) | Stepping half shaft quenching production line | |
| CN212864856U (en) | Flame-retardant, explosion-proof and low-air-volume quenching/tempering oil tank system | |
| CN213623981U (en) | Door machine of getting is collected to 7 meters coke oven pushes away coke guide flue gas | |
| CN212051237U (en) | Flue gas diffusing guide device for riser of totally-closed or semi-closed coke oven | |
| CN212476035U (en) | Safety hanging bracket for maintenance of open type roasting furnace | |
| CN215965430U (en) | Integral movable sand box flue gas trapping and treating device | |
| CN215276326U (en) | Low-energy-consumption movable air purification device for hot repair of steel ladle | |
| CN212894835U (en) | Fire extinguishing and smoke collecting device for quenching oil tank of pit furnace |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20151111 |
|
| WD01 | Invention patent application deemed withdrawn after publication |