CN204417532U - ZDZ type twin shaft automatic negative-pressure slag discharging device and Controlling System thereof - Google Patents
ZDZ type twin shaft automatic negative-pressure slag discharging device and Controlling System thereof Download PDFInfo
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- CN204417532U CN204417532U CN201420835571.2U CN201420835571U CN204417532U CN 204417532 U CN204417532 U CN 204417532U CN 201420835571 U CN201420835571 U CN 201420835571U CN 204417532 U CN204417532 U CN 204417532U
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- slag
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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Abstract
The utility model discloses ZDZ type twin shaft automatic negative-pressure slag discharging device and Controlling System thereof, comprise travel mechanism, vacuum storehouse, dreg inhaling pipe and vacuum pump, lower end, vacuum storehouse is provided with travel mechanism, upper end is provided with the vacuum pump vacuumized, dreg inhaling pipe is communicated in upper end, vacuum storehouse, dreg inhaling pipe and vacuum storehouse connectivity part are provided with reverse checkvalve, scum pipe is communicated in bottom, vacuum storehouse, the deslagging mouth of pipe is provided with automatic valve, vacuum storehouse outer wall is provided with by-pass valve control air pressure rly., dreg inhaling pipe interposition is equipped with one section for being flexible coupling, vacuum storehouse is provided with mechanical arm, mechanical arm rear end has lifting fan tooth, lifting fan tooth rear end is connected with cycloidal-pin wheel reducing motor.The utility model slag absorbing mouth of pipe can realize drawing ladle liquid level scum silica frost by center to surrounding spiral motion; Slag absorbing process evenly can also complete slag absorbing flow process fast, simultaneously vacuum storehouse is provided with inlet system in addition, can, again after slag absorbing, pressurize, slag is drained fast to vacuum storehouse.
Description
Technical field
The utility model relates to steel-smelting slag-discharging part technical field, specifically belongs to ZDZ type twin shaft automatic negative-pressure slag discharging device and Controlling System thereof.
Background technology
Smelting slag in steel melting furnace, when not taking related measure, can enter ladle in a large number in tapping process, swim in molten steel surface, because of containing a large amount of FeO and P
2o
5deng oxious component, many unfavorable factors are brought to the aftertreatment of molten steel stove.Therefore reducing ladle and carry smelting slag, is the gordian technique of steel-making quality, especially high-quality steel grade.Domestic at present for reducing the method for molten steel finishing slag, one is adopt the devices such as slag-blocking ball, is kept off in stove by slag, make slag not follow molten steel and enter ladle before molten steel is come out of the stove.Slag-blocking apparatus is thrown in into stove according to machinery, then equipment old factory building that is huge, that invest high, existing steel mill limits by condition, and is difficult to install, artificial input then labor condition is severe, labour intensity is large, and it is low to throw in success ratio, and Chang Buneng effectively stops slag to enter ladle.The slag adopting machinery or manually remove in ladle, because slag swims in molten steel surface, mechanical action is dumb, and the poor working environment of mechanical means, thus fault is many.Manually skim and there is work situation difference equally, the problems such as labour intensity is large.Additionally use a kind of ladle-to-ladle method at present, but in ladle-to-ladle treating processes, greatly, refractory consumption rate is high, and extends the treatment cycle of molten steel for molten steel and liquid steel temperature loss, so fail extensively to adopt.
Utility model content
For the problems referred to above, the purpose of this utility model there is provided ZDZ type twin shaft automatic negative-pressure slag discharging device, and the slag absorbing mouth of pipe can realize drawing ladle liquid level scum silica frost by center to surrounding spiral motion; This action can get rid of top of the slag poor fluidity, the shortcoming that point of fixity slag absorbing is uneven, not only makes slag absorbing process evenly can also complete slag absorbing flow process fast, thus ensures the temperature not loss of molten steel; Simultaneously vacuum storehouse is provided with inlet system in addition, can, again after slag absorbing, pressurizes to vacuum storehouse, slag is drained fast.
The technical solution adopted in the utility model is as follows:
ZDZ type twin shaft automatic negative-pressure slag discharging device, comprise travel mechanism, vacuum storehouse, dreg inhaling pipe and vacuum pump, lower end, described vacuum storehouse is provided with travel mechanism, upper end is provided with the vacuum pump vacuumized, dreg inhaling pipe is communicated in upper end, vacuum storehouse, dreg inhaling pipe and vacuum storehouse connectivity part are provided with reverse checkvalve, scum pipe is communicated in bottom, vacuum storehouse, the deslagging mouth of pipe is provided with automatic valve, vacuum storehouse outer wall is provided with by-pass valve control air pressure rly., described dreg inhaling pipe interposition is equipped with one section for being flexible coupling, described vacuum storehouse is provided with mechanical arm, mechanical arm and vacuum storehouse are rotationally connected, mechanical arm front end is connected with dreg inhaling pipe, rear end has lifting fan tooth, lifting fan tooth rear end is connected with cycloidal-pin wheel reducing motor, controlling machine mechanical arm carries out fan-shaped swing around fulcrum, reducing motor is fixed by electric machine support, electric machine support is fixed on vacuum storehouse, connecting air inlet system is gone back in described vacuum storehouse.
Described lower end, vacuum storehouse is provided with traversing mechanism, and traversing mechanism is arranged in travel mechanism, and described traversing mechanism is configured to by direct linkage type reducing motor and revolving support, and revolving support frame is installed on direct linkage type motor, and vacuum storehouse is arranged on revolving support frame.
Described inlet system is made up of air compressor, pneumatic tube and brake control valve, and pneumatic tube one end is connected on air compressor, and the other end is connected on vacuum storehouse, is provided with brake control valve near vacuum storehouse end.
Be provided with bottom surface in described vacuum storehouse and raise formation gradient from scum pipe Link Port to surrounding gradually, be convenient to slag and discharge fast and drain.
Intelligent video camera head is provided with for observing vacuum storehouse deslagging situation in described vacuum storehouse upper cover.
Rear end, described vacuum storehouse mounts lifting drive system.
The Slagoff method of ZDZ type twin shaft automatic negative-pressure slag discharging device, the first step, molten steel hired car is reached dreg discharging area and suction slag sound zone system station identical after, the dreg inhaling pipe mouth of pipe is controlled to fall molten steel dross surface by mechanical arm, dreg inhaling pipe can by transverse axis and vertical Dual-spindle linked, and ladle liquid level scum silica frost is drawn to surrounding spiral motion in dreg inhaling pipe cause for gossip Xian You center; This action can get rid of top of the slag poor fluidity, the shortcoming that point of fixity slag absorbing is uneven, not only makes slag absorbing process even, can also complete slag absorbing flow process fast, and the slag absorbing time can be saved by 10 seconds-12 seconds by point of fixity slag absorbing for 17 seconds, thus ensures the temperature not loss of molten steel.
Second step, start top, vacuum storehouse negative pressure ventilation vacuum pump, air negative pressure in vacuum storehouse is reached identical with absorption molten steel gravity set(ting)value, the slag absorbing mouth of pipe is engaged with scum silica frost liquid level in ladle, then controlled by the intelligent camera system remote reviewing being arranged on top, vacuum storehouse;
3rd step, in scum pipe outlet, autocontrol valve is installed, when the absorption slag liquid level of taking seriously in hole capital after selling all securities reaches top dead center, automatically open slag-discharging valve by air pressure rly., the liquid steel slag in suction vacuum storehouse is discharged smoothly, fully discharge fast before not solidifying to make slag in storehouse, open air compressor simultaneously, open gas transmission valve, pressure air is inputted vacuum storehouse, make from top to bottom to form row pressure power in storehouse, thus the liquid steel slag sunk at the bottom of storehouse is discharged fully rapidly.
The Controlling System of ZDZ type twin shaft automatic negative-pressure slag discharging device, this described system comprises rotating mechanism control module, hoisting appliance control module and vacuum mechanism control module, described rotating mechanism control module, hoisting appliance control module and vacuum mechanism control module are all connected to PLC control chip, described vacuum mechanism module is by vacuum-pressure detection instrument, pressure transmitter and pressure unit detect and control to form, controlled by rotating mechanism control module and hoisting appliance, control dreg inhaling pipe and insert ladle slag blanket, by vacuum-pressure detection instrument, pressure transmitter and pressure unit detect and control to start top, vacuum storehouse negative pressure ventilation vacuum pump, air negative pressure in vacuum storehouse is reached identical with absorption molten steel gravity set(ting)value, when the absorption slag liquid level of taking seriously in hole capital after selling all securities reaches top dead center, by vacuum-pressure detection instrument, pressure transmitter and pressure unit detect and control to restart vacuum pump pressurization, thus the liquid steel slag sunk at the bottom of storehouse is discharged fully rapidly.
Described system also comprises the degree of depth that laser ranger measures liquid surface adsorption.
Described system is also provided with sound and light alarm and controls and video monitor.
Compared with the prior art, the beneficial effects of the utility model are as follows:
The utility model slag absorbing mouth of pipe can realize drawing ladle liquid level scum silica frost by center to surrounding spiral motion; This action can get rid of top of the slag poor fluidity, the shortcoming that point of fixity slag absorbing is uneven, not only makes slag absorbing process evenly can also complete slag absorbing flow process fast, thus ensures the temperature not loss of molten steel; Simultaneously vacuum storehouse is provided with inlet system in addition, can, again after slag absorbing, pressurizes to vacuum storehouse, slag is drained fast.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model device;
Fig. 2 is the schematic diagram of the utility model apparatus system control action process;
Fig. 3 is the utility model vacuum pump control circuit;
Fig. 4 is the utility model vacuum storehouse rotation control circuit;
Fig. 5 is the utility model vacuum storehouse elevating control circuit.
Embodiment
See accompanying drawing, ZDZ type twin shaft automatic negative-pressure slag discharging device, comprise travel mechanism 1, vacuum storehouse 2, dreg inhaling pipe 3 and vacuum pump 4, described lower end, vacuum storehouse 2 is provided with traversing mechanism 5, traversing mechanism 5 is arranged in travel mechanism 1, described traversing mechanism 5 is made up of direct linkage type reducing motor 501 and revolving support frame 502, revolving support frame 502 is installed on direct linkage type motor 501, vacuum storehouse 2 is arranged on revolving support frame 502, upper end, described vacuum storehouse 2 is provided with the vacuum pump 4 vacuumized, dreg inhaling pipe 3 is communicated in upper end, vacuum storehouse 2, dreg inhaling pipe 3 and vacuum storehouse 2 connectivity part are provided with reverse checkvalve 201, scum pipe 6 is communicated in bottom, vacuum storehouse 2, scum pipe 6 mouthfuls is provided with automatic valve 601, vacuum storehouse 2 outer wall is provided with by-pass valve control 601 air pressure rly. 202, described dreg inhaling pipe 3 interposition is equipped with one section for being flexible coupling 301, described vacuum storehouse 2 is provided with mechanical arm 7, mechanical arm 7 and vacuum storehouse 2 are rotationally connected, mechanical arm 7 front end is connected with dreg inhaling pipe, rear end has lifting fan tooth 701, lifting fan tooth 701 rear end is connected with cycloidal-pin wheel reducing motor 8, controlling machine mechanical arm carries out fan-shaped swing around fulcrum, reducing motor 8 is fixed by electric machine support 801, electric machine support 801 is fixed on vacuum storehouse 2, connecting air inlet system 9 is gone back in described vacuum storehouse 2, described inlet system is by air compressor 901, pneumatic tube 902 and brake control valve 903 are formed, pneumatic tube 902 one end is connected on air compressor 901, the other end is connected on vacuum storehouse 2, brake control valve 903 is provided with near vacuum storehouse 2 end.Be provided with bottom surface in described vacuum storehouse and raise formation gradient from scum pipe Link Port to surrounding gradually, be convenient to slag discharge fast and drain, be provided with intelligent video camera head 10 in described vacuum storehouse upper cover for observing vacuum storehouse deslagging situation, rear end, described vacuum storehouse mounts lifting drive system.
When under equipment standard state, turn knob is in standard state, button vacuum pump is started working when pressure does not reach set(ting)value, traversing mechanism also will have standby position to shift to working position simultaneously, receiving vacuum storage can be complete and after being rotated in place, jacking system drops to and pre-sets working position, open valve release negative pressure after vacuum storehouse topworks receives dreg inhaling pipe signal and instantaneously slag is drawn to vacuum storehouse, pressure equilibrium final vacuum valve cuts out automatically, jacking system is promoted to standby position, emptying slag opened by residual cake valve simultaneously, rotational system receives residual cake valve signal and gets back to standby position.
Slag absorbing control process, the instruction to traversing mechanism and vacuum pump is sent by Controlling System, traversing mechanism moves to working position by standby position, and lifting dreg inhaling pipe is by mechanical arm by cycloidal-pin wheel reducing motor connection control, and its dreg inhaling pipe inserts in ladle slag blanket by standby position, the vacuum storage of Intelligent Measurement position can terminate armed bit, discharge negative pressure absorbing slag to vacuum storehouse valve-off by topworks, lifting dreg inhaling pipe rises to standby position, and residual cake valve is opened, emptying rear automatic closedown, traversing mechanism returns standby position.
The Slagoff method of ZDZ type twin shaft automatic negative-pressure slag discharging device, the first step, molten steel hired car reach dreg discharging area and suction slag sound zone system station identical after, the dreg inhaling pipe mouth of pipe is controlled to fall molten steel dross surface by mechanical arm, dreg inhaling pipe can by transverse axis and vertical Dual-spindle linked, and ladle liquid level scum silica frost is drawn to surrounding spiral motion in dreg inhaling pipe cause for gossip Xian You center.This action can get rid of top of the slag poor fluidity, the shortcoming that point of fixity slag absorbing is uneven, not only make slag absorbing process even, slag absorbing flow process can also be completed fast, now calculate with 80T-120T ladle diameter 4000mm, thickness of steel slag 80-100mm, inhale 80% and stay 20% steel slag heat-insulating, the slag absorbing time can be saved by 10 seconds-12 seconds by original point of fixity slag absorbing for 17 seconds, thus ensures the temperature not loss of molten steel;
Second step, start top, vacuum storehouse negative pressure ventilation vacuum pump, the air negative pressure in vacuum storehouse is made to reach 0.065 ~ 0.08MPa, at this pressure, the suction that slag suction mouth produces is enough to be 2.7 ± 2 (proportions of material by proportion, proportion as carbon steel is 7.85) liquid steel slag suction vacuum storehouse, the mouth of pipe is engaged with scum silica frost liquid level in ladle, then controlled by the intelligent camera system remote reviewing being arranged on top, vacuum storehouse;
3rd step, in scum pipe outlet, autocontrol valve is installed, when the absorption slag liquid level of taking seriously in hole capital after selling all securities reaches top dead center, automatically slag-discharging valve is opened by air pressure rly., the liquid steel slag in suction vacuum storehouse is discharged smoothly, fully discharge fast before not solidifying to make slag in storehouse, open air compressor simultaneously, open gas transmission valve, by the pressure air of 12MPa input vacuum storehouse, make from top to bottom to form row pressure power in storehouse, thus the liquid steel slag sunk at the bottom of storehouse is discharged fully rapidly.
The Controlling System of ZDZ type twin shaft automatic negative-pressure slag discharging device, this described system comprises rotating mechanism control module, hoisting appliance control module and vacuum mechanism control module, described rotating mechanism control module, hoisting appliance control module and vacuum mechanism control module are all connected to PLC control chip, described vacuum mechanism module is by vacuum-pressure detection instrument, pressure transmitter and pressure unit detect and control to form, controlled by rotating mechanism control module and hoisting appliance, control dreg inhaling pipe and insert ladle slag blanket, by vacuum-pressure detection instrument, pressure transmitter and pressure unit detect and control to start top, vacuum storehouse negative pressure ventilation vacuum pump, air negative pressure in vacuum storehouse is reached identical with absorption molten steel gravity set(ting)value, when the absorption slag liquid level of taking seriously in hole capital after selling all securities reaches top dead center, by vacuum-pressure detection instrument, pressure transmitter and pressure unit detect and control to restart vacuum pump pressurization, thus the liquid steel slag sunk at the bottom of storehouse is discharged fully rapidly, described system also comprises the degree of depth that laser ranger measures liquid surface adsorption, described system is also provided with sound and light alarm and controls and video monitor, circuit system adopts two-way to autotomy transfer lever and phase sequence power supply system, rotating mechanism control module, hoisting appliance control module and vacuum mechanism control module are furnished with corresponding thermal overload protection device, PLC intelligent object, power supply and instrument detect, monitoring UPS power supply-distribution system, workstation by data line and PLC interconnected, ups power 2KVA capacity, supply worktable, PLC, video monitor instrument and tensimeter, all devices is all in interlocking state at equipment debugging in normal circumstances, overhaul of the equipments, switching button is transferred to debugging mode by emergency, remove and the interlocking of other equipment, crawl can be entered and operate every platform equipment, when guaranteeing accident, local devices still can run well.
When under equipment standard state, switching button is in standard state, start button rotating mechanism also will have standby position to shift to working position, jacking system drops to and pre-sets working position, vacuum pump is under the cooperation of pressure, flow detection and pressure automatic regulating valve, coordinate dreg inhaling pipe by slag inspiration vacuum storehouse, when hole capital after selling all securities liquid level of taking seriously reaches set(ting)value, deslagging time delay several seconds valve-off when waiting until that slag exhausts opened by residual cake valve, jacking system is promoted to standby position by working position, and rotational system is also by standby position; Described video monitor instrument has two pick up cameras, be provided with peep hole place at vacuum chamber, be provided with high temperature resistant shield cap, pick up camera 1# is arranged in shield cap, pick up camera 2# is that intelligent sphere machine is arranged near dreg inhaling pipe outside dreg inhaling pipe, to observe dreg inhaling pipe and ladle situation.
Equipment Running System control process, Controlling System starts, rotating mechanism shifts to work by standby position, stadimeter and protective guard work feedback signal and data simultaneously, vacuum dreg inhaling pipe walks to slag blanket according to feedback data, vacuum pump is started working simultaneously, dreg inhaling pipe coordinates uniform descent to molten steel face, the pressure of valve tube, flow detecting signal also feeds back, when vacuum storehouse reaches 70% of the capacity of setting, residual cake valve is opened automatically, deslagging feedback signal, determined by the monitoring of peep hole pick up camera and software delay, after vacuum slag absorbing, the time delay several seconds arranges gate valve and automatically closes also feedback signal, vacuum pressure exceedes in limited time, the automatic opening/closing of variable valve regulates vacuum and feeds back signal, vacuum pressure wink speed exceed the upper limit and flow reaches micro-value time vacuum pump automatically stop, determine by after the monitoring of slag suction mouth pick up camera, analysis, rise to standby position by working position after lifting structure receives residual cake valve switch bit signal and vacuum pump stop signal and feed out signal.
Claims (9)
1.ZDZ type twin shaft automatic negative-pressure slag discharging device, comprise travel mechanism, vacuum storehouse, dreg inhaling pipe and vacuum pump, it is characterized in that: lower end, described vacuum storehouse is provided with travel mechanism, upper end is provided with the vacuum pump vacuumized, dreg inhaling pipe is communicated in upper end, vacuum storehouse, dreg inhaling pipe and vacuum storehouse connectivity part are provided with reverse checkvalve, scum pipe is communicated in bottom, vacuum storehouse, the deslagging mouth of pipe is provided with automatic valve, vacuum storehouse outer wall is provided with by-pass valve control air pressure rly., described dreg inhaling pipe interposition is equipped with one section for being flexible coupling, described vacuum storehouse is provided with mechanical arm, mechanical arm and vacuum storehouse are rotationally connected, mechanical arm front end is connected with dreg inhaling pipe, rear end has lifting fan tooth, lifting fan tooth rear end is connected with cycloidal-pin wheel reducing motor, connecting air inlet system is gone back in described vacuum storehouse.
2. ZDZ type twin shaft automatic negative-pressure slag discharging device according to claim 1, it is characterized in that: described lower end, vacuum storehouse is provided with traversing mechanism, traversing mechanism is arranged in travel mechanism, described traversing mechanism is configured to by direct linkage type reducing motor and revolving support, revolving support frame is installed on direct linkage type motor, and vacuum storehouse is arranged on revolving support frame.
3. ZDZ type twin shaft automatic negative-pressure slag discharging device according to claim 2, it is characterized in that: described inlet system is made up of air compressor, pneumatic tube and brake control valve, pneumatic tube one end is connected on air compressor, the other end is connected on vacuum storehouse, is provided with brake control valve near vacuum storehouse end.
4. ZDZ type twin shaft automatic negative-pressure slag discharging device according to claim 3, is characterized in that: be provided with bottom surface in described vacuum storehouse and raise formation gradient from scum pipe Link Port to surrounding gradually.
5. ZDZ type twin shaft automatic negative-pressure slag discharging device according to claim 4, is characterized in that: be provided with intelligent video camera head in described vacuum storehouse upper cover for observing vacuum storehouse deslagging situation.
6. ZDZ type twin shaft automatic negative-pressure slag discharging device according to claim 5, is characterized in that: rear end, described vacuum storehouse mounts lifting drive system.
7. one kind for controlling the Controlling System of the ZDZ type twin shaft automatic negative-pressure slag discharging device of claim 1-6 described in one of them, it is characterized in that: this described system comprises rotating mechanism control module, hoisting appliance control module and vacuum mechanism control module, described rotating mechanism control module, hoisting appliance control module and vacuum mechanism control module are all connected to PLC control chip, described vacuum mechanism module is by vacuum-pressure detection instrument, pressure transmitter and pressure unit detect and control to form, controlled by rotating mechanism control module and hoisting appliance, control dreg inhaling pipe and insert ladle slag blanket, by vacuum-pressure detection instrument, pressure transmitter and pressure unit detect and control to start top, vacuum storehouse negative pressure ventilation vacuum pump, air negative pressure in vacuum storehouse is reached identical with absorption molten steel gravity set(ting)value, when the absorption slag liquid level of taking seriously in hole capital after selling all securities reaches top dead center, by vacuum-pressure detection instrument, pressure transmitter and pressure unit detect and control to restart vacuum pump pressurization, thus the liquid steel slag sunk at the bottom of storehouse is discharged fully rapidly.
8. the Controlling System of ZDZ type twin shaft automatic negative-pressure slag discharging device according to claim 7, is characterized in that: described system also comprises the degree of depth that laser ranger measures liquid surface adsorption.
9. the Controlling System of ZDZ type twin shaft automatic negative-pressure slag discharging device according to claim 8, is characterized in that: described system is also provided with sound and light alarm and controls and video monitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420835571.2U CN204417532U (en) | 2014-12-24 | 2014-12-24 | ZDZ type twin shaft automatic negative-pressure slag discharging device and Controlling System thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420835571.2U CN204417532U (en) | 2014-12-24 | 2014-12-24 | ZDZ type twin shaft automatic negative-pressure slag discharging device and Controlling System thereof |
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| Publication Number | Publication Date |
|---|---|
| CN204417532U true CN204417532U (en) | 2015-06-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420835571.2U Withdrawn - After Issue CN204417532U (en) | 2014-12-24 | 2014-12-24 | ZDZ type twin shaft automatic negative-pressure slag discharging device and Controlling System thereof |
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| CN (1) | CN204417532U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104498660A (en) * | 2014-12-24 | 2015-04-08 | 马鞍山市晨光高耐磨科技发展有限公司 | ZDZ-type biaxial automatic negative pressure slag discharge device and control system thereof |
-
2014
- 2014-12-24 CN CN201420835571.2U patent/CN204417532U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104498660A (en) * | 2014-12-24 | 2015-04-08 | 马鞍山市晨光高耐磨科技发展有限公司 | ZDZ-type biaxial automatic negative pressure slag discharge device and control system thereof |
| CN104498660B (en) * | 2014-12-24 | 2016-08-24 | 马鞍山市晨光高耐磨科技发展有限公司 | ZDZ type twin shaft automatic negative-pressure slag-draining device and control system thereof |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150624 Effective date of abandoning: 20160824 |
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| C25 | Abandonment of patent right or utility model to avoid double patenting |