CN202247611U - Indoor asphaltic mixture stirring device - Google Patents
Indoor asphaltic mixture stirring device Download PDFInfo
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- CN202247611U CN202247611U CN2011203857297U CN201120385729U CN202247611U CN 202247611 U CN202247611 U CN 202247611U CN 2011203857297 U CN2011203857297 U CN 2011203857297U CN 201120385729 U CN201120385729 U CN 201120385729U CN 202247611 U CN202247611 U CN 202247611U
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Abstract
The utility model relates to an indoor asphaltic mixture stirring device. The traditional asphaltic mixture stirring device cannot be set in urban suburbs or a building site because of air pollution caused by dust during operation, while, for approaching the building site to reduce transport cost and effectively controlling the construction quality and the construction progress, the asphaltic mixture stirring device is obliged to be set in a factory building to lessen the air pollution; and for enabling the stirring device to be set in the factory building, higher equipment in the device must be lowered to the standard height of the factory building. For achieving the above-described purpose, the utility model discloses the following technical scheme: a stone hoist, which is 20m in height, in a stone system is separated into a plurality of sections of hoists lower than 10m through adopting an assembly line separation mode; the sections of the hoists are mounted in the factory building separately; and the stone system, a powder system, an asphalt system, and a dust removal system, after separation, all can be set in the factory building. The indoor asphaltic mixture stirring device disclosed by the utility model has the beneficial effects of environment friendliness, low transport cost since the asphaltic mixture can be supplied for the building site timely, high degree of automation, high speed and efficiency in equipment installation, stable and reliable quality, convenience in installation and debugging, short installation period, and so on.
Description
Technical field
The utility model relates to the road building machinery field, especially the ground surface material mixing plant.
Background technology
Along with building in a large number of road, the demand of bituminous mixture sharply rises, and the grown place of bituminous mixture should still can pollute environment in the existing bituminous concrete manufacturing process near the city or the building site of repairing the roads, and has a strong impact on people's health.The reason that pollutes has following several respects:
Produce airborne dust when 1, building stones advance batch hopper;
Produce airborne dust when 2, building stones are used the conveyor delivery of opening wide;
3, the connecting portion bad sealing between equipment produces dust;
4, tar heavy oil in use can produce oil gas, and frowziness is discharged the after stain air;
When 5, bituminous mixture production finished, the waste sludge discharge that cleans the agitated kettle generation very easily produced a large amount of airborne dusts to ground, environment is had bigger pollution.
Above-mentioned reason has limited the preparation ground of bituminous mixture near the city or the suburbs, is built up in outdoor ground of the spaciousness far away from the city mostly.The equipment fabricating yard is generally long 50 meters, and wide 30～50 meters, the stock ground is generally 20*70 square metre, because building stones elevator height is 20 meters, so the spatial altitude of equipment fabricating yard is 20 meters.
If the grown place of bituminous mixture just must be overcome the above problems near the city or the building site of repairing the roads.
The utility model content
For with the bituminous mixture grown place near making land used; Must solve the pollution to environment, the problem that disturbs residents of set noise for this reason can be with production equipment in outdoor immigration factory building; Can prevent to pollute and noise, get into lower Standard Factory Room problem but also will solve high equipment.
Solve the problem in the bituminous mixture mixing plant inlet chamber, except solving the air pollution problems inherent, main will solve the problem that reduces building stones elevator height; We have proposed the intention with the streamline split mode, but will on technology, split rationally through research for many years; Should satisfy the height of building stones outlet on the elevator, satisfy the temperature requirement of building stones again, we are through repeated tests; Overcome numerous difficulties, obtained comparatively ideal results.
The technical scheme of the indoor asphalt mixture mixing plant of realization above-mentioned purpose is following:
The indoor asphalt mixture mixing plant is installed in the Standard Factory Room, long 70～120 meters of factory building, wide 2*18 rice or 2*20 rice; High 11 meters, building stones system, powder system, pitch system are housed in factory building, the terminal device of three systems converges in above a mixing bowl; 20 meters high building stones elevator splits into multistage with the streamline split mode and is lower than 10 meters elevator in the building stones system, further, can split into No. 1, No. 2 two sections; Every section high 10 meters, two sections are contained in respectively in the factory building, and No. 1 section is connected with vibrosieve, many specifications hot aggregate bin and building stones weighing hopper in succession; Be connected with No. 2 sections through dump skip, building stones batch hopper feeder is the grab bucket feeder that is contained under the driving again, and the medium pitch tank top is equipped with the oil gas trunk line in the pitch system; The oil gas trunk line is connected with building stones dram burner; Dust pelletizing system also is housed in factory building, and the building stones dram is connected with primary dust removing device, secondary ash collector in succession, and the workshop deduster is housed in factory building; Secondary ash collector and workshop the deduster air-introduced machine through separately respectively are connected with outdoor chimney, and material heating system and power supply and automatic control system also are housed in the factory building.
Complete building stones system disposes successively: grab bucket feeder, batch hopper, the conveyer belt that gathers materials, transition conveyer belt, inclined conveyer belt, dram, No. 1 section of building stones lifting, vibrosieve, many specifications hot aggregate bin, building stones weighing hopper, dump skip, No. 2 sections of building stones lifting, transition hopper.
The powder system disposes successively: powder storehouse, conveying worm 1, filler elevator, conveying worm 2, powder transitional storehouse, conveying worm 3, powder weighing hopper.
The pitch system disposes asphalt storage, bitumenpump, pitch hopper successively, also disposes in the asphalt storage district and unloads oil tank, to the heat-conducting oil furnace of equipment heating usefulness, and the asphalt storage district is protected by crashproof barricade.
Further, gather materials conveyer belt, transition conveyer belt, inclined conveyer belt is enclosed construction.
The frame of all devices is the layering container structure.
The circuit wiring of power supply and automatic control system is modular layering wiring.
The structure of firing equipment is the container modular structure.
Automatic control system is a computer control system, and the controlled parts of each part all are equipped with scram button.
Digital display material level system is housed in building stones system many specifications hot aggregate bin.
At building stones system batch hopper supplied materials fracture warning device, flow limit controller, vibration motor are housed.
At the dust pelletizing system air-introduced machine frequency changer controller is housed.
In factory building, also do not have building stones windrow place, the dress driving is equipped with the grab bucket feeder under the driving above building stones rickyard ground.
According to technique scheme; Tower design with existing pitch batch mixing agitator; Change streamline split mode design into, be split into shorter extremely, and satisfy the height of building stones outlet on the elevator; Also satisfied the temperature requirement of building stones, equipment can successfully be installed in the workshop that length meets Standard Factory Room.
Can produce a large amount of airborne dusts during the loader material loading of prior art, the operating radius of loader is also bigger, has wasted the space in workshop, and the utility model adopts the grab bucket feeder material loading that is contained under the driving, both can reduce airborne dust, can improve the workshop utilization rate again.
Adopt the conveyer of enclosed construction, prevented the generation of airborne dust in course of conveying.
The oil gas centralized Control that tar heavy oil is in use produced is led in the dram burner as the thermal source burning to trunk line then, has both saved the energy, has protected environment again.
Air in the whole workshop is discharged in the atmosphere after filtering through dust pelletizing system, the workshop can be produced in the cleaned air environment of relative closure prevented noise pollution to external world again.
The present technique scheme is except reaching environmental protection, and bituminous mixture can in time be supplied outside the utility model purpose of imagining in advance in building site, also has following beneficial effect:
1, the indoor asphalt mixture mixing plant provides the production base has been built near the advantage city or the building site, can alleviate cost of transportation, can effectively control construction quality and construction speed.
2, adopted computer automatic control system, slave computer detects treatment process parameter and variable, and host computer carries out production management, compensates dynamic momentum and correction automatically and flies material, can reliably in time control manufacturing process, realizes the full automatic working operation.
3, every layer of frame adopted container structure, reduced the height of assembly, made things convenient for transportation and lifting, shortened installation period, improved safety.
4, in power supply and automatic control system; Adopted modular layering connection, at each layer a junction box has been arranged all, fine rule all installs before dispatching from the factory in the box; Equipment only needs directly to lead in the junction box power line just passable behind the building site; So not only standard arranging of circuit, also be convenient to Installation and Debugging, greatly the reduction of erection time.
5, the firing equipment of each in heating system has also adopted the container modular organization, assembled respectively in factory, and equipment only needs behind the building site flange linked up just becomes complete device.This not only standard technology, reduced installation in the building site, also received engineering quickness and high efficiency, the reliable effect of steady quality.
Description of drawings
Fig. 1 is the utility model indoor asphalt mixture mixing plant process chart;
Fig. 2 is the equipment layout plan (vertical view) of the utility model;
Fig. 3 is the elevational schematic view (the indoor equipment rear elevation of Fig. 2) of the utility model;
Fig. 4 is the circuit layout of the utility model;
Fig. 5 is asphalt storage oil gas treatment process figure.
The title of each label is following among the figure:
1-batch hopper, the closed conveyer belt that gathers materials of 2-, the closed transition conveyer belt of 3-, the closed inclined conveyer belt of 4-, 5-dram, 6-dram burner, No. 1 section of 7-building stones elevator, 8-vibrosieve, many specifications of 9-hot aggregate bin, 10-building stones weighing hopper, 11-dump skip, No. 2 sections of 12-building stones elevator, 13-transition hopper, 14-a mixing bowl, 15-grab bucket feeder,
21-powder storehouse, 22-conveying worm 1,23-filler elevator, 24-conveying worm 2,25-powder transitional storehouse, 26 conveying worms 3,27-powder weighing hopper,
31-asphalt storage, 32-bitumenpump, 33-pitch hopper, 34-permeability cell, 35-oil gas trunk line, 36-unload oil tank, 37-heat-conducting oil furnace, the crashproof barricade of 38-,
41-dram stack, 42-primary dust removing device, 43-secondary ash collector, 44-1,44-2-air-introduced machine, 45-chimney, 46-workshop deduster, 47-workshop exhaust column,
51-bituminous mixture transport vehicle, 52-transport vehicle track, 53-Crane Rail, 54-windrow place, 55,56,57,58-turnover gate,
61-feed motor; Vibrating motor; The spacing crane span structure circuit of fracture; 62-tilts to carry motor crane span structure circuit; 63-dram motor crane span structure; The control of 64-burner; Blast fan; Building stones thermometric crane span structure; The 65-vibrosieve; Building stones elevator 1; Hot aggregate bin temperature and material level signal; Building stones blowing solenoid control; The building stones metering signal; Building stones elevator Bridge 2 frame; The 66-mixing building is maked somebody a mere figurehead portal frame; The moving control of 67-mixing building qin cabinet; 68-burner switch board; 69-mixing building power supply power cabinet; The 70-powder is carried and powder storehouse feed crane span structure; The 71-a mixing bowl; Filler elevator; The powder metering; The pitch metering; The powder conveyer; Powder is put; Pitch is put; Closing material puts; Finished product material venting case crane span structure; The 72-bag-type dust is carried crane span structure.
The specific embodiment
Following examples also combine accompanying drawing that the utility model technical scheme is described further.
The used factory building of present embodiment is the typical construction factory building, strides wide altogether 36 meters, high 11 meters for long 90 meters, two.Factory building is divided into two strides, and one strides the main windrow place 54 that is used as, and Crane Rail 53 is housed up, and another strides location production unit.With a mixing bowl 14 is the center, on one side the building stones system through splitting is installed, another side is installed powder system and pitch system.
The equipment of building stones system is equipped with a plurality of batchings all 1 successively, and the building stones of different sizes are contained in the different batch hoppers, and the closed conveyer belt 2 that gathers materials is housed below batch hopper; Building stones get into drying baker 5 through closed transition conveyer belt 3 and closed inclined conveyer belt 4 again; Discharging opening at drying baker is equipped with burner 6, and the oil gas of emitting in the asphalt storage 31 of burner acts as a fuel, and building stones heating back gets into No. 1 section 7 of building stones elevator through splitting; 10 meters of No. 1 section height; Get into vibrosieve 8, many specifications hot aggregate bin 9, building stones weighing hopper 10, dump skip 11 successively from the building stones of No. 1 section top output, No. 2 section 12 bottoms of dump skip and building stones elevator are connected 10 meters of No. 2 section height of building stones elevator; The top discharge mouth is connected with transition bucket 13, and the below is a mixing bowl 14 that is installed on the mixing building.
The powder system is equipped with powder storehouse 21, and below, powder storehouse is a conveying worm 1, and conveying worm 1 is connected with filler elevator 23 bottoms; 10 meters of filler elevator height, filler elevator top is connected with conveying worm 2, and powder transitional storehouse 25 tops are connected with conveying worm 2; The bottom is connected with conveying worm 3; Conveying worm 3 is connected with powder weighing hopper 27 again, and powder weighing hopper below is a mixing bowl 14. and is in each junction and is tightly connected, and prevents that powder from leaking.
The pitch system is equipped with asphalt storage 31, and bitumenpump 32 is connected with pitch hopper 33 through the asphalt delivery pipeline, and the pitch hopper is connected with a mixing bowl 14 through pipeline.Permeability cell 34 is arranged at the asphalt storage top, and permeability cell is connected with oil gas trunk line 35, and the oil gas trunk line is connected with dram burner 6 again, and the oil gas that produces in the asphalt storage is imported dram, and use acts as a fuel.Near asphalt storage, also be provided with and unload oil tank 36 and heat-conducting oil furnace 37, brick work has crashproof barricade 38 outside.
Dust pelletizing system comprises: building stones from the windrow place to the batch hopper material loading be be mounted on the driving under grab bucket feeder 15 material loadings; Airborne dust when having reduced material loading; Gather materials conveyer belt 2, transition conveyer belt 3 and inclined conveyer belt 4 is hermetically-sealed construction, eliminated airborne dust, on the top of dram 5 dram stack 41 is housed; And connect primary dust removing device 42, secondary ash collector 43, discharge from chimney 45 through air-introduced machine 44-1.Workshop exhaust column 47, workshop deduster 46 also are housed in the workshop, discharge from chimney 45 through air-introduced machine 44-2.
Below a mixing bowl 14, be provided with transport vehicle track 52, transport vehicle 51 dispatches from the factory from the transport vehicle track after having adorned bituminous mixture.
Power supply and automatic control system adopt modular layering connection, at each layer of stirring layer junction box are arranged all, and the fine rule on the equipment is all received in the junction box in strict accordance with regulation in factory.Equipment is after the building site, as long as just passable in the power line direct access junction box.
The control system adopts computer control, screen display, and the keyboard input, equipment has improved anti-interference and operational reliability.Microcomputer automatic control system has adopted the slave computer detection, has handled the amount of changing, and host computer carries out the pattern of production management, carries out dynamic momentum compensation automatically and revise flying material, can control manufacturing process reliably, realizes the full automatic working operation.Simultaneity factor also is provided with strict defencive function; At each parts scram button is housed all;, operation irregularity not only stops the device of being correlated with when appearring in equipment on the system program automatically; Simultaneously also can reach the purpose of safety in production through being contained in the operation of the scram button control appliance on each parts.
In Machine Design, every layer of frame adopts the container-type structure, make transportation and lift convenient, the also corresponding shortening of installation period.Because well below traditional asphalt mixing plant, it is also just more obvious in the safety and the advantage aspect the degree of difficulty of lifting on whole height for this complete equipment.
Aspect firing equipment, also adopt the container modular organization.Main pipeline, the valve of all heating tanks (comprising boiler) all install in factory, jar with jar between main line connects also through flange and in factory, completes, equipment has arrived after the building site, a need link up equipment through flange.So both convenient and swift, standard is attractive in appearance again.Resettlement for equipment is used also very convenient.
In order to improve the automatic control level of indoor asphalt mixture mixing plant, key equipment has adopted computer control, enumerates following instance.
The digital display material level
Adopt the digital display material level of prior art can only show that material level is lower than lower limit or is higher than the material level of the upper limit, the utility model can show Realtime Level in the feed bin continuously.Be employed in the cable wire of packing in the building stones storehouse, when the different material level of cable wire contact height, process level sensor processing generation different voltages with different signal is sent to computer and shows through the light beam form.Digital display material level system is equipped with building stones storehouse observation panel in the building stones storehouse of different size, the continous way level sensor, and building stones storehouse cable wire and building stones door are formed.
Building stones compensate control automatically
Adopting real-time building stones flow detection algorithm is pid algorithm, and building stones are flown how much compensating automatically of material amount.Computer calculates every kind of required weight of material according to grating, and compensation rate is carried out weighing, opens corresponding building stones door, and building stones get into weighing hopper, bearing sensor will claim building stones weight feedback to the computer, calculate through computer again, judge whether to close corresponding building stones door.The building stones control system for automatic compensation is made up of the building stones storehouse of different size, building stones metering gate and control cylinder, building stones weighing hopper, S type tensile force type sensor and the building stones weighing hopper cylinder that opens the door.
Building stones batch bin flow is reported to the police and control
When the batch bin supplied materials, the rotation under building stones promote of alarm under shield, handle is connected switch, and the control of alarm indication supplied materials through rotating wheel, is regulated the circular arc height of baffle plate, control building stones discharging thickness; The alarm under shield is vertical during fracture, and switch breaks off, and the vibration motor in the system is started working, and the vibrations warehouse sinks building stones, continues discharging.
Fan frequency conversion control
Facilities of mix storied building is equipped with and extracts the blower fan that powder, dedusting are used; Dust content directly influences quality of asphalt mixtures in the building stones; With the negative pressure signal in the detected flue, input computer, the variation of real-time tracking negative pressure; Calculate through PID, the rotational speed regulation air quantity that changes air-introduced machine makes flue keep required negative pressure.Adopt frequency converter timing not only to control the content of dust, also played energy-conservation effect.
Above embodiment only is a kind of scheme of the utility model, also can design the different structure and the mount scheme of multiple fractionation scheme and equipment according to the intention of the utility model, and these schemes are enumerated no longer one by one, but all belong to the protection domain of the utility model.
Claims (17)
1. the indoor asphalt mixture mixing plant has a Standard Factory Room, the long 70-120 rice of factory building; Wide 2*18-2*20 rice; High 11 meters, the bituminous mixture mixing plant has building stones system, powder system, pitch system, and the terminal device of three systems converges in above a mixing bowl; It is characterized by 20 meters high building stones elevators in the building stones system splits into the streamline split mode and is lower than 10 meters high multistage hoisting machine; Every section elevator is installed in respectively in the factory building, and dust pelletizing system is housed in factory building, and the building stones system, powder system, the pitch system that split are installed in the factory building.
2. indoor asphalt mixture mixing plant according to claim 1; The building stones elevator that it is characterized by the building stones system split into No. 1, No. 2 two sections; Two sections are contained in the factory building respectively; No. 1 section is connected with vibrosieve, many specifications hot aggregate bin and building stones weighing hopper successively, is connected with No. 2 lower ends through dump skip again.
3. indoor asphalt mixture mixing plant according to claim 1 and 2 is characterized by heating system and power supply and automatic control system also are housed in factory building.
4. indoor asphalt mixture mixing plant according to claim 1 and 2; It is characterized by the building stones system and dispose grab bucket feeder, batch hopper, the conveyer belt that gathers materials, transition conveyer belt, inclined conveyer belt, dram, No. 1 section of building stones elevator, vibrosieve, many specifications hot aggregate bin, building stones weighing hopper, dump skip, No. 2 sections of building stones elevator, transition hopper successively.
5. indoor asphalt mixture mixing plant according to claim 1 and 2 is characterized by the powder system and disposes powder storehouse, conveying worm 1, filler elevator, conveying worm 2, powder transitional storehouse, conveying worm 3, powder weighing hopper successively.
6. indoor asphalt mixture mixing plant according to claim 1 and 2; It is characterized by the pitch system and dispose asphalt storage, bitumenpump, pitch hopper successively; Also dispose in the asphalt storage district and to unload oil tank, to the heat-conducting oil furnace of equipment heating usefulness, the asphalt storage district is protected by crashproof barricade.
7. indoor asphalt mixture mixing plant according to claim 1; It is characterized by dust pelletizing system and comprise building stones dram dust pelletizing system and factory building dust pelletizing system; The building stones dram is connected with primary dust removing device, secondary ash collector successively, and secondary ash collector and factory building the deduster air-introduced machine through separately respectively are connected with outdoor chimney.
8. indoor asphalt mixture mixing plant according to claim 1 and 2 is characterized by the conveyer belt that gathers materials, transition conveyer belt, inclined conveyer belt and is enclosed construction.
9. indoor asphalt mixture mixing plant according to claim 3 is characterized by at the asphalt storage top oil gas trunk line is housed, and the oil gas trunk line is connected with building stones dram burner.
10. indoor asphalt mixture mixing plant according to claim 1 and 2, it is characterized by institute's organic frame is the layering container structure.
11. indoor asphalt mixture mixing plant according to claim 1 and 2, the circuit wiring that it is characterized by power supply and automatic control system are modular layering wiring.
12. indoor asphalt mixture mixing plant according to claim 1 and 2, the structure that it is characterized by firing equipment is the container modular structure.
13. indoor asphalt mixture mixing plant according to claim 1 and 2, it is characterized by automatic control system is computer control system, at each controlled parts scram button is housed all.
14. indoor asphalt mixture mixing plant according to claim 13 is characterized by digital display material level system is housed in building stones system many specifications hot aggregate bin.
15. indoor asphalt mixture mixing plant according to claim 13 is characterized by at building stones system batch hopper supplied materials fracture warning device, flow limit controller, vibration motor is housed.
16. indoor asphalt mixture mixing plant according to claim 13 is characterized by at the dust pelletizing system air-introduced machine frequency changer controller is housed.
17. indoor asphalt mixture mixing plant according to claim 1 and 2 is characterized by and in factory building, also is provided with building stones windrow place, the dress driving is equipped with the grab bucket feeder under the driving above building stones rickyard ground.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203857297U CN202247611U (en) | 2011-10-11 | 2011-10-11 | Indoor asphaltic mixture stirring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203857297U CN202247611U (en) | 2011-10-11 | 2011-10-11 | Indoor asphaltic mixture stirring device |
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| Publication Number | Publication Date |
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| CN202247611U true CN202247611U (en) | 2012-05-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011203857297U Expired - Lifetime CN202247611U (en) | 2011-10-11 | 2011-10-11 | Indoor asphaltic mixture stirring device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102359051A (en) * | 2011-10-11 | 2012-02-22 | 无锡雪桃集团有限公司 | Indoor asphalt mixture stirring device |
| CN103121306A (en) * | 2013-03-20 | 2013-05-29 | 宝鸡富士特钛业（集团）有限公司 | Automatic mixing and loading system of titanium sponge pressing block oil press |
| CN105544354A (en) * | 2016-02-04 | 2016-05-04 | 武汉成世通环保沥青工程有限公司 | Medium temperature pitch mixture batching plant and method for preparing mixture by utilizing batching plant |
| CN105727823A (en) * | 2016-03-24 | 2016-07-06 | 中山市拓维电子科技有限公司 | Mixing structure of mixing plant |
| CN109453710A (en) * | 2018-12-29 | 2019-03-12 | 杭州市沥青拌和有限公司 | A kind of pitch mixes and stirs production line |
-
2011
- 2011-10-11 CN CN2011203857297U patent/CN202247611U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102359051A (en) * | 2011-10-11 | 2012-02-22 | 无锡雪桃集团有限公司 | Indoor asphalt mixture stirring device |
| CN102359051B (en) * | 2011-10-11 | 2013-09-18 | 无锡雪桃集团有限公司 | Indoor asphalt mixture stirring device |
| CN103121306A (en) * | 2013-03-20 | 2013-05-29 | 宝鸡富士特钛业（集团）有限公司 | Automatic mixing and loading system of titanium sponge pressing block oil press |
| CN103121306B (en) * | 2013-03-20 | 2015-08-19 | 宝鸡富士特钛业（集团）有限公司 | The automatic batch mixing feeding system of titanium sponge briquetting hydraulic press |
| CN105544354A (en) * | 2016-02-04 | 2016-05-04 | 武汉成世通环保沥青工程有限公司 | Medium temperature pitch mixture batching plant and method for preparing mixture by utilizing batching plant |
| CN105727823A (en) * | 2016-03-24 | 2016-07-06 | 中山市拓维电子科技有限公司 | Mixing structure of mixing plant |
| CN109453710A (en) * | 2018-12-29 | 2019-03-12 | 杭州市沥青拌和有限公司 | A kind of pitch mixes and stirs production line |
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| C14 | Grant of patent or utility model | ||
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| CX01 | Expiry of patent term |
Granted publication date: 20120530 |
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| CX01 | Expiry of patent term |