CN110549497B - A planetary stirring UHPC mixing production process and complete equipment - Google Patents
A planetary stirring UHPC mixing production process and complete equipment Download PDFInfo
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- CN110549497B CN110549497B CN201911013642.4A CN201911013642A CN110549497B CN 110549497 B CN110549497 B CN 110549497B CN 201911013642 A CN201911013642 A CN 201911013642A CN 110549497 B CN110549497 B CN 110549497B
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- 238000003756 stirring Methods 0.000 title claims abstract description 134
- 239000011374 ultra-high-performance concrete Substances 0.000 title claims abstract description 53
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 36
- 238000002156 mixing Methods 0.000 title claims abstract description 20
- 239000000835 fiber Substances 0.000 claims abstract description 81
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 80
- 239000010959 steel Substances 0.000 claims abstract description 80
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 60
- 239000000843 powder Substances 0.000 claims abstract description 39
- 239000000654 additive Substances 0.000 claims abstract description 27
- 230000000996 additive effect Effects 0.000 claims abstract description 27
- 238000005303 weighing Methods 0.000 claims abstract description 18
- 230000007246 mechanism Effects 0.000 claims abstract description 17
- 238000003860 storage Methods 0.000 claims abstract description 9
- 238000001816 cooling Methods 0.000 claims description 29
- 230000005540 biological transmission Effects 0.000 claims description 19
- 239000007789 gas Substances 0.000 claims description 17
- 239000000203 mixture Substances 0.000 claims description 14
- 238000012216 screening Methods 0.000 claims description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 6
- 230000003014 reinforcing effect Effects 0.000 claims description 4
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 3
- 239000001569 carbon dioxide Substances 0.000 claims description 3
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- 239000000463 material Substances 0.000 abstract description 17
- 230000000694 effects Effects 0.000 abstract description 4
- 238000005457 optimization Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 33
- 230000008569 process Effects 0.000 description 28
- 238000009775 high-speed stirring Methods 0.000 description 11
- 239000004568 cement Substances 0.000 description 8
- 238000006703 hydration reaction Methods 0.000 description 8
- 239000006004 Quartz sand Substances 0.000 description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 7
- 239000004567 concrete Substances 0.000 description 7
- 230000036571 hydration Effects 0.000 description 7
- 238000005086 pumping Methods 0.000 description 4
- 238000002360 preparation method Methods 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000005457 ice water Substances 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 238000007873 sieving Methods 0.000 description 2
- 229910021487 silica fume Inorganic materials 0.000 description 2
- 239000011863 silicon-based powder Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000013019 agitation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
- B28C5/08—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions using driven mechanical means affecting the mixing
- B28C5/10—Mixing in containers not actuated to effect the mixing
- B28C5/12—Mixing in containers not actuated to effect the mixing with stirrers sweeping through the materials, e.g. with incorporated feeding or discharging means or with oscillating stirrers
- B28C5/16—Mixing in containers not actuated to effect the mixing with stirrers sweeping through the materials, e.g. with incorporated feeding or discharging means or with oscillating stirrers the stirrers having motion about a vertical or steeply inclined axis
- B28C5/166—Pan-type mixers
- B28C5/168—Pan-type mixers with stirrers having planetary motion
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
- B28C5/40—Mixing specially adapted for preparing mixtures containing fibres
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
- B28C5/40—Mixing specially adapted for preparing mixtures containing fibres
- B28C5/402—Methods
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
- B28C5/46—Arrangements for applying super- or sub-atmospheric pressure during mixing; Arrangements for cooling or heating during mixing, e.g. by introducing vapour
- B28C5/468—Cooling, e.g. using ice
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C7/00—Controlling the operation of apparatus for producing mixtures of clay or cement with other substances; Supplying or proportioning the ingredients for mixing clay or cement with other substances; Discharging the mixture
- B28C7/04—Supplying or proportioning the ingredients
- B28C7/0481—Plant for proportioning, supplying or batching
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C7/00—Controlling the operation of apparatus for producing mixtures of clay or cement with other substances; Supplying or proportioning the ingredients for mixing clay or cement with other substances; Discharging the mixture
- B28C7/04—Supplying or proportioning the ingredients
- B28C7/06—Supplying the solid ingredients, e.g. by means of endless conveyors or jigging conveyors
- B28C7/068—Supplying the solid ingredients, e.g. by means of endless conveyors or jigging conveyors having means to elevate or hoist a charging-bin or container
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C9/00—General arrangement or layout of plant
- B28C9/02—General arrangement or layout of plant for producing mixtures of clay or cement with other materials
-
- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
Abstract
本发明提供了一种行星搅拌式UHPC搅拌生产成套设备包括：供料系统、提升机构粉料供料系统、水及添加剂添加系统、钢纤维供料系统和单卧轴式搅拌系统；其中，供料系统包括至少一套骨料提升系统、计量斗、混合料水平输送装置；提升机构粉料供料系统包括第一输料管、第一粉料仓组、称重斗、第二输料管和第二粉料仓组，水及添加剂添加系统包括外加剂储料罐、水供应装置和外加剂混合溶解装置；钢纤维供料系统包括第一钢纤维计量提升装置、第一钢纤维筛分布料机、第二钢纤维计量提升装置和第二钢纤维筛分布料机；搅拌系统包括至少一台行星式搅拌机。各项性能参数都得到显著提高，说明生产工艺及设备结构的优化对提高产品质量有明显作用。
The present invention provides a planetary stirring UHPC mixing production equipment including: a feeding system, a lifting mechanism powder feeding system, a water and additive adding system, a steel fiber feeding system and a single horizontal shaft mixing system; wherein the feeding system includes at least one set of aggregate lifting system, a metering bucket, and a mixed material horizontal conveying device; the lifting mechanism powder feeding system includes a first feeding pipe, a first powder bin group, a weighing bucket, a second feeding pipe and a second powder bin group, and the water and additive adding system includes an admixture storage tank, a water supply device and an admixture mixing and dissolving device; the steel fiber feeding system includes a first steel fiber metering lifting device, a first steel fiber sieve distributor, a second steel fiber metering lifting device and a second steel fiber sieve distributor; and the mixing system includes at least one planetary mixer. All performance parameters have been significantly improved, indicating that the optimization of production process and equipment structure has a significant effect on improving product quality.
Description
Technical Field
The invention relates to a planetary stirring UHPC stirring production process and complete equipment, in particular to a process method and complete equipment for UHPC (ultra-high performance concrete) batching, conveying and stirring production.
Background
UHPC is short for Ultra-high performance concrete (Ultra-High Performance Concrete), refers to the generic name of cement-based composite materials with compressive strength above 150MPa, ultra-high toughness and Ultra-long durability, mainly comprises materials such as quartz sand, silica fume, cement, water reducing agent, steel fiber and the like, is constructed according to the principle of maximum compactness, has Ultra-low water-gel ratio and porosity, and can minimize defects (pores and microcracks) in the materials.
The UHPC material component does not contain coarse aggregate, the particle size is generally smaller than 1mm, and the UHPC material has ultrahigh strength and excellent durability due to high compactness, and the service life can reach more than 200 years. In addition, the fine steel fibers dispersed in the UHPC can greatly slow down the expansion of micro cracks in the material, so that the material shows ultrahigh toughness and ductility, is the most advanced cement-based soil woodworking material internationally at present, and has wide application prospect in the field of bridge tunnels and national defense engineering under the background of light weight, high strength, quick erection and durability of bridge engineering requirements due to the excellent mechanical and durability.
However, UHPC has high cement content and low water content compared with ordinary cement concrete, so that the UHPC has high hydration heat and large shrinkage in the preparation and pouring processes, is easy to form structural cracks, and limits the application of the UHPC in large-scale concrete engineering.
The test researches show that the UHPC mixture starts to generate hydration reaction from the die entering, the temperature gradually rises, the hydration heat release amount is rapidly increased about 10 hours after the die entering until the hydration heat release rate is gradually slowed down about 20 hours, the hydration heat release is mainly concentrated at 10-20 hours, the die entering temperature of the UHPC mixture can be obviously reduced by adopting a mode of adding crushed ice, so that the temperature peak of a central point is reduced, but the time required for melting the crushed ice is shortened, the preparation and mixing time of the UHPC material is prolonged, the production efficiency is reduced, and the consumption of stirring power is increased. Meanwhile, when the thickness of UHPC exceeds 20mm, the temperature difference between the center and the outer edge of the cross section reaches 7.3 ℃, the maximum tensile stress value caused by the temperature difference is 4.63MPa, and cracks of the internal structure due to unbalanced stress are very easy to occur. The temperature stress of the hydration heat generated during UHPC production is not negligible.
In summary, there are problems in the UHPC material production process and production equipment in that pouring cracks are easily caused by heat generated by hydration heat in the stirring production process, the power consumption in the production process is large, and the productivity is low.
Disclosure of Invention
The invention aims to provide a planetary stirring UHPC stirring production process and complete equipment, which can effectively solve the problems of nonstandard UHPC stirring process flow, high power required by equipment driving, low production efficiency, casting cracks caused by heating in the mixing process of a mixture and the like.
The invention provides planetary stirring UHPC stirring production complete equipment which comprises a feeding system, a lifting mechanism powder feeding system, a water and additive adding system, a steel fiber feeding system and a single horizontal shaft type stirring system, wherein the feeding system comprises at least one set of aggregate lifting system, a weighing hopper and a mixed material horizontal conveying device, the lifting mechanism powder feeding system comprises a first conveying pipeline, a first powder storage bin group, a weighing hopper, a second conveying pipeline and a second powder storage bin group, the water and additive adding system comprises an additive storage tank, a water supply device and an additive mixing and dissolving device, the steel fiber feeding system comprises a first steel fiber metering lifting device, a first steel fiber sieving and distributing machine, a second steel fiber metering lifting device and a second steel fiber sieving and distributing machine, and the stirring system comprises at least one planetary stirring machine.
Further, the aggregate lifting system in the planetary stirring UHPC stirring production complete equipment comprises an aggregate lifting hopper, an aggregate vertical lifting device, an aggregate horizontal moving device and four aggregate bins, wherein the aggregate vertical lifting device is a first aggregate bin, a second aggregate bin, a third aggregate bin and a fourth aggregate bin from small to large according to the size of stored aggregate.
Further, the water and additive system of the planetary stirring UHPC stirring production complete equipment further comprises an air pump, wherein the air pump is used for injecting gas into the water.
Further, the gas injected by the air pump in the planetary stirring UHPC stirring production complete equipment is carbon dioxide or nitrogen.
Further, the first steel fiber metering and lifting device in the planetary stirring UHPC stirring production complete equipment comprises a first steel fiber metering device, a first steel fiber vertical lifting device and a first steel fiber horizontal conveying device;
The second steel fiber metering and lifting device comprises a second steel fiber metering device, a second steel fiber vertical lifting device and a second steel fiber horizontal conveying device.
The planetary stirrer comprises a stirrer shell, a motor, a gear, a belt transmission device and a speed changer, wherein a containing space is formed between the stirrer shell and the stirrer inner cover and used for storing cooling circulating water, reinforcing ribs are further arranged in the stirrer shell and the stirrer inner cover, the stirrer shell is provided with a cooling circulating water inlet and a cooling circulating water outlet, the cooling circulating water flows in from the cooling circulating water inlet and flows out from the cooling circulating water outlet after cooling, the planetary stirrer further comprises a planetary transmission mechanism, the upper end of the planetary transmission mechanism is connected with an output shaft of the speed changer, a stirring arm is arranged at the lower end of the planetary transmission mechanism, stirring blades are fixedly connected to the bottom of the stirring arm, a finished product discharge port is further arranged at the bottom of the planetary stirrer, the stirring main shaft is further arranged in the stirrer shell, and power of the motor is sequentially transmitted to the stirring main shaft through the gear, the belt transmission device and the speed changer, and further the stirring arm and the stirring blades arranged at the outermost end of the planetary transmission mechanism are sleeved on the planetary transmission mechanism.
On the other hand, the planetary stirring UHPC stirring production process comprises a quartz sand feeding step, a powder feeding step, a water and additive feeding step, a steel fiber feeding step and a stirring step, wherein the quartz sand feeding step is to convey quartz sand aggregate into a single horizontal shaft type stirring system after being metered and weighed according to a proportion, the powder feeding step is to convey cement and silicon powder required in the stirring process into the single horizontal shaft type stirring system after being metered and weighed according to a proportion, the water and additive feeding step is to firstly inject gas into water required in the stirring process through an air pump and dissolve the gas, then convey the water and the additive required in the stirring process into the single horizontal shaft type stirring system after being metered and weighed according to a proportion, the steel fiber feeding step is to convey steel fiber required in the stirring process into the single horizontal shaft type stirring system after being metered and weighed according to a proportion, the stirring step is to firstly start a cooling circulating water circulating step, enable ice water close to 0 ℃ to enter a cavity in a stirring barrel shell through a cooling circulating water inlet through a conveying pipeline, flow out of the cooling circulating water outlet and flow back through a pipeline after exchanging heat in a stirring barrel inner cover and a stirring machine, and stirring the stirring barrel is started through a motor, and stirring can be always in a low-temperature state in the stirring barrel shell.
By adopting the production process and equipment, various performance parameters of the UHPC concrete structure are obviously improved, and the optimization of the production process and equipment structure has obvious effect of improving the product quality.
Drawings
FIG. 1 is a schematic diagram of a process flow for carrying out the invention.
Fig. 2 is a front view showing the overall construction of the plant of the present invention.
Fig. 3 is a top view of the overall construction of the plant of the present invention.
Fig. 4 is a side elevation view of the main building of the plant mixing plant of the present invention.
FIG. 5 is a schematic cross-sectional view of a planetary stirring system according to the present invention.
FIG. 6 is a schematic diagram of a planetary stirring system transmission mechanism.
Reference numerals:
1 feeding system
11 Aggregate lifting system
1101 Aggregate lifting hopper
1102 Aggregate vertical lifting device
1103 Aggregate horizontal movement device
1104 Aggregate bin
12 Weighing hopper
13, Horizontal conveying device for mixture
2, Powder feeding system of lifting mechanism
21 First material conveying pipe
22 First powder storage bin group
2201 First powder bin
23 First weighing hopper
24 Second feed delivery pipe
25 Second powder storage bin group
2501 Second powder bin
26 Second weighing hopper
3 Water and additive addition System
31 Additive storage tank
32 Water supply device
33 Admixture mixing and dissolving device
4 Steel fiber feeding system
41 First steel fiber metering and lifting device
4101 First steel fiber measuring device
4102 First Steel fiber vertical lifting device
4103 First steel fiber horizontal conveying device
42 First steel fiber screening distributor
43 Second steel fiber metering and lifting device
4301 Second Steel fiber metering device
4301 Second Steel fiber vertical lifting device
4303 Second Steel fiber horizontal conveying device
44 Second steel fiber screening distributor
5 Planetary stirring system
51 First planetary mixer
511 Stirring cylinder shell
511A, mixing drum outer cover
511B inner cover of stirring cylinder
511C reinforcing rib
512 Cooling circulating water inlet
513 Cooling circulation Water Outlet
514 Electric push rod
515 Low speed agitation controller
516 High-low speed control fork
517 High-speed stirring controller
518 Motor
519 Motor output shaft
520 Sliding key
521 Sliding gear
522 High speed output gear
523 Low speed output Gear
524 Duplex gear
525 Drive key
526 High-low speed control output shaft
527 Pulley drive
528 Speed variator
529 Transmission output Gear
530 Stirring arm
531 Stirring blade
532 Finished product material discharging door
533 Discharge hopper
52 Second planetary mixer
Detailed Description
The objects, technical solutions and advantages of the present invention will become more apparent by the following detailed description of the present invention with reference to the accompanying drawings. It should be understood that the description is only illustrative and is not intended to limit the scope of the invention. In addition, in the following description, descriptions of well-known structures and techniques are omitted so as not to unnecessarily obscure the present invention.
The objects, technical solutions and advantages of the present invention will become more apparent by the following detailed description of the present invention with reference to the accompanying drawings. It should be understood that the description is only illustrative and is not intended to limit the scope of the invention. In addition, in the following description, descriptions of well-known structures and techniques are omitted so as not to unnecessarily obscure the present invention.
In the description of the present invention, it should be noted that the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Referring to fig. 1, a planetary stirring type UHPC stirring production plant shown in this embodiment is shown below, and comprises a feeding system 1, a powder 2, a water and additive addition system 3, a steel fiber feeding system 4 and a planetary stirring system 5.
The feeding system 1 is described first, the feeding system 1 comprises 2 sets of aggregate lifting systems 11, a weighing hopper 12 and a mixture horizontal conveying device 13, the aggregate lifting systems 11 comprise an aggregate lifting hopper 1101, an aggregate vertical lifting device 1102, an aggregate horizontal moving device 1103 and 4 aggregate bins 1104, and the aggregate lifting systems are respectively a first aggregate bin, a second aggregate bin, a third aggregate bin and a fourth aggregate bin from small to large according to the size of stored aggregate. When the aggregate bin 1104 is required to be charged, aggregate firstly enters the aggregate vertical lifting device 1102 through the aggregate lifting hopper 1101, is lifted to the top, and then is conveyed into the aggregate bin 1104 through the aggregate horizontal movement device 1103.
Next, a powder feeding system 2 is described, where the powder feeding system 2 includes a first conveying pipe 21, a first powder bin group 22, a weighing hopper 23, a second conveying pipe 24 and a second powder bin group 25, and since two kinds of powder are needed in the mixing process, there are two powder bin groups in total, the first powder bin group 22 includes a first powder bin 2201, the second powder bin group 25 includes a second powder bin 2501, when powder needs to be filled, the powder is blown into the first powder bin 2201 and the second powder bin 2501 through the first conveying pipe 21 and the second conveying pipe 24 respectively under the action of high pressure gas, during production, the cement in the first powder bin group 2201 is conveyed to the first weighing hopper 23 through a screw conveyer 2502 for accumulated weighing measurement, and the silica fume in the second powder bin group 2501 is conveyed to the second weighing hopper 26 through the screw conveyer 2502 for accumulated weighing measurement.
Next, the water and additive adding system 3 will be described, and the water and additive system 3 includes an additive storage tank 31, a water supply device 32 and an additive mixing and dissolving device 33, and the additive and water are metered and then enter the additive mixing and dissolving device 33 to be fully mixed and dissolved.
Because the UHPC material is very viscous after being mixed, the resistance in the stirring process is particularly high, the pumping process is also subjected to high resistance, a special concrete pumping device is required to pump, and the pumping adaptability is poor, so the water and additive adding system 3 can also comprise an air pump (not shown in the figure), gas (such as carbon dioxide, nitrogen and other gases) is injected into the water through the air pump and dissolved, the water dissolved with the gas participates in the mixing process, the added gas is released from the water, and heat is absorbed, so that the temperature of the mixing process is reduced, a large number of tiny bubbles are formed in the UHPC material, the viscosity is effectively reduced, the mixing resistance is reduced, and the resistance in the pumping process is also effectively reduced.
Next, a steel fiber feeding system 4 is described, wherein the steel fiber feeding system 4 comprises a first steel fiber metering and lifting device 41, a first steel fiber screening and distributing machine 42, a second steel fiber metering and lifting device 43 and a second steel fiber screening and distributing machine 44, the first steel fiber metering and lifting device 41 comprises a first steel fiber metering and lifting device 4101, a first steel fiber vertical lifting device 4102 and a first steel fiber horizontal conveying device 4103, the steel fibers are firstly sent into the first steel fiber metering and lifting device 41 after unpacking, then are weighed and metered by the first steel fiber metering and lifting device 4101, then are lifted to the top of the complete equipment through the first steel fiber vertical lifting device 4102, then are conveyed to the first steel fiber screening and distributing machine 42 through the first steel fiber horizontal conveying device 4103, and then enter a screening program, and the second steel fiber metering and lifting device 43 comprises a second steel fiber metering and lifting device 4301, a second steel fiber vertical lifting device 4302 and a second steel fiber horizontal conveying device 4303, the steel fibers are firstly sent into the second steel fiber metering and lifting device 43, then are conveyed to the top of the complete equipment through the second steel fiber metering and distributing machine 4302 after unpacking, and then are conveyed to the top of the complete equipment through the second steel fiber metering and distributing machine 4302, and finally, the steel fiber is conveyed to the second fiber metering and the complete equipment.
Next, a planetary stirring system 5 is described, wherein the stirring system 5 comprises a first planetary stirrer 51 and a second planetary stirrer 52, the two stirrers are cooperatively produced, when one stirrer is produced, the other stirrer can be used for preparing ingredients, the first planetary stirrer 51 is taken as an example for description, the first planetary stirrer 51 comprises a stirring barrel shell 511, the stirring barrel shell 511 comprises a stirring barrel outer cover 511A and a stirring barrel inner cover 511B, a containing space is formed between the stirring barrel outer cover 511A and the stirring barrel inner cover 511B for storing cooling circulating water, meanwhile, for strengthening strength, a reinforcing rib 511C is further arranged between the stirring barrel outer cover 511A and the stirring barrel inner cover 511B, a cooling circulating water inlet 512 and a cooling circulating water outlet 513 are formed in the stirring barrel outer cover 511A, the cooling circulating water flows in from the cooling circulating water inlet 512 and flows out from the cooling circulating water outlet after cooling, the upper end of the planetary transmission mechanism 529 is connected with an output shaft, a stirring arm 530 is arranged at the lower end, and the bottom of the stirring arm 530 is fixedly connected with the stirring blade 532. A product outlet 532 is also provided at the bottom of the first planetary mixer 51, and a hopper 533 may be provided at the bottom of the product outlet 532.
The bottom of agitator casing 511 can also evenly be arranged a plurality of breather pipes, evenly is arranged a plurality of air vent on the breather pipe, and the breather pipe is through the gas injection in the air pump to agitator casing 511, like this can also be to the injection gas of mixing in-process in the stirring process, so, can effectively reduce the viscosity of concrete to reduce the temperature of mixing in-process better. Preferably, to better reduce the problem, the injected gas may be a low temperature gas (temperature below 10 degrees celsius).
The power of the motor 518 is sequentially transmitted to the star gear 529 through a gear shifter and a gearbox 528, so that the stirring vane 532 is driven to rotate, and the gear shifter has two gears of high-speed gear and low-speed gear, so that the high-speed gear and the low-speed gear can be selected according to actual use. The gear shifting device comprises a motor output shaft 519, a high-speed output gear 522, a sliding gear 521 and a low-speed output gear 523 which are sleeved on the motor output shaft 519 in sequence, wherein the sliding gear 521 is radially fixed on the motor output shaft 519 through a sliding key 520, the high-speed output gear 522 and the low-speed output gear 523 are both meshed with a duplex gear 524 sleeved on the high-speed and low-speed control output shaft 526, the duplex gear 524 is radially fixed through a transmission key 525, in order to switch between a high-speed state and a low-speed state, a high-speed control shifting fork 516 is further arranged, the high-speed and low-speed control shifting fork 516 is switched between a high-speed state and a low-speed state under the action of an electric push rod 514, a low-speed stirring controller 515 and a high-speed stirring controller 517 are correspondingly arranged at two limit positions of the high-speed control shifting fork 516, the electric push rod 521 is driven along the motor output shaft 519, the sliding gear 521 is simultaneously driven along the motor output shaft 519, when the high-speed control shifting fork 516 reaches the low-speed stirring controller or the high-speed stirring controller is in contact with the transmission key 525, when the high-speed stirring controller 516 contacts with the low-speed stirring controller 517, and when the high-speed stirring controller 521 is completely contacted with the high-speed outer teeth of the high-speed stirring controller 521, and the high-speed stirring controller 521 is completely sleeved on the high-speed gear 521, and the high-speed stirring controller 521 is completely contacted with the inner teeth of the high-speed output gear 521, and the high-speed stirring controller 521 is correspondingly not contacted with the high-speed stirring gear 521 at the high-speed stirring controller. The transmission then transmits power through the belt drive 527 to the transmission 528, and after the transmission 528 completes the downshift, the power is transmitted to the star gear 529. And the second planetary mixer 52 is identical to the first planetary mixer 51 in structure, and will not be described again here.
The stirring production process based on the complete equipment comprises a quartz sand feeding step, a powder feeding step, a water and additive feeding step, a steel fiber feeding step and a stirring step, wherein the quartz sand feeding step is to convey quartz sand aggregate into a planetary stirring system 5 after weighing according to a proportion, the powder feeding step is to convey cement and silicon powder required by the stirring process into the planetary stirring system 5 after weighing according to a proportion, the water and additive feeding step is to convey water and additive required by the stirring process into the planetary stirring system 5 after weighing according to a proportion, the steel fiber feeding step is to convey steel fibers required by the stirring process into the planetary stirring system 5 after weighing according to a proportion, the stirring step is to start a cooling circulating water circulating step, so that ice water close to 0 ℃ enters a cavity in a stirring barrel shell 511 from a cooling circulating water inlet 512 through a conveying pipeline, flows out from a cooling circulating water outlet 513 after exchanging heat in the stirring barrel inner cover 511B and the stirring machine through a pipeline, stirring is carried out, and then a motor is started to stir, and the stirring barrel shell can be in a low-temperature state all the time in the process. And the electric push rod 514 is driven by the automatic control program to drive the high-low speed control fork 516 so as to switch between the low speed state and the high speed state. Since the planetary stirring system 5 includes two sets of stirrers, namely the first planetary stirrer 51 and the second planetary stirrer, when one set of stirrer is stirring, the other set of stirrer can prepare materials, so that the planetary stirring system can continuously work.
Taking the current common 2-side planetary stirring UHPC stirrer as an example, the motor power is 110Kw, and after the high-low speed driving conversion mode is changed into the high-low speed driving conversion mode, the motor power is 90Kw, and the energy-saving effect is obvious.
To verify the superiority and effectiveness of the UHPC stirring production process, the proportion of a single UHPC label is shown in Table 1, the temperature change condition of the UHPC mixture produced by the conventional process and the UHPC mixture produced by the process is shown in Table 2, and the performance test results of the UHPC mixture produced by the conventional process and the UHPC mixture produced by the process are shown in Table 3 for comparison.
Table 1 shows the proportions (unit: kg/m 3) of a single number of UHPC
| Material used | UHPC dry powder | Water and its preparation method | Steel fiber |
| Specific gravity | 2242 | 157 | 173 |
TABLE 2 environmental temperature 28 ℃ for the case of temperature change with time of the conventional process production and the UHPC mixture produced by the present process
Table 3 shows comparison of the results of the UHPC mixture performance test of the conventional process and the present process
As apparent from the results of Table 2, the UHPC mixture is maintained in a low temperature state after 100 minutes by adopting the production process and equipment of the invention, which is beneficial to counteracting the high temperature of the concrete structure caused by concentrated release of hydration heat for 10-20 hours after the UHPC mixture is poured into a mould, preventing the generation of pouring cracks and improving the quality of the structure.
As apparent from the results in Table 3, the production process and equipment of the invention are adopted to obviously improve various performance parameters of the UHPC concrete structure, which shows that the optimization of the production process and equipment structure has obvious effect on improving the product quality.
It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explanation of the principles of the present invention and are in no way limiting of the invention. Accordingly, any modification, equivalent replacement, improvement, etc. made without departing from the spirit and scope of the present invention should be included in the scope of the present invention. Furthermore, the appended claims are intended to cover all such changes and modifications that fall within the scope and boundary of the appended claims, or equivalents of such scope and boundary.
Claims (6)
1. Planetary stirring formula UHPC stirring production complete sets, characterized in that includes:
The device comprises a feeding system (1), a lifting mechanism powder feeding system (2), a water and additive adding system (3), a steel fiber feeding system (4) and a planetary stirring system (5);
Wherein the feeding system (1) comprises at least one set of aggregate lifting system (11), a weighing hopper (12) and a mixture horizontal conveying device (13);
The lifting mechanism powder feeding system (2) comprises a first conveying pipe (21), a first powder bin group (22), a weighing hopper (23), a second conveying pipe (24) and a second powder bin group (25);
The water and additive adding system (3) comprises an additive storage tank (31), a water supply device (32), an additive mixing and dissolving device (33) and an air pump;
The steel fiber feeding system (4) comprises a first steel fiber metering and lifting device (41), a first steel fiber screening and distributing machine (42), a second steel fiber metering and lifting device (43) and a second steel fiber screening and distributing machine (44);
The planetary stirring system (5) comprises at least one planetary stirrer;
the planetary mixer comprises a mixer barrel housing (511);
A plurality of vent pipes are uniformly arranged at the bottom of the stirring barrel shell (511), a plurality of vent holes are uniformly arranged in the vent pipes, and gas is injected into the stirring barrel shell (511) through the air pump;
the gas is a low temperature gas having a temperature below 10 degrees celsius.
2. The planetary stirring UHPC stirring production kit of claim 1, wherein:
The aggregate lifting system (11) comprises an aggregate lifting hopper (1101) aggregate vertical lifting device (1102) aggregate horizontal moving device (1103) and four aggregate bins (1104), according to the sizes of the stored aggregates from small to large, the aggregates are respectively a first aggregate bin the second aggregate bin, the third aggregate bin and the fourth aggregate bin.
3. The planetary stirring UHPC stirring production kit of claim 1, wherein:
the air pump is used for injecting air into water.
4. A planetary stirring UHPC stirring production kit as claimed in claim 3, characterized in that:
the gas injected by the air pump is carbon dioxide or nitrogen.
5. The planetary stirring UHPC stirring production kit of claim 4, wherein:
The first steel fiber metering and lifting device (41) comprises a first steel fiber metering device (4101), a first steel fiber vertical lifting device (4102) and a first steel fiber horizontal conveying device (4103);
the second steel fiber metering and lifting device (43) comprises a second steel fiber metering device (4301), a second steel fiber vertical lifting device (4302) and a second steel fiber horizontal conveying device (4303).
6. The planetary stirring UHPC stirring production kit of claim 5, wherein:
The stirring barrel shell (511) comprises a stirring barrel outer cover (511A) and a stirring barrel inner cover (511B), and a containing space is formed between the stirring barrel outer cover (511A) and the stirring barrel inner cover (511B) and used for storing cooling circulating water;
The stirring barrel outer cover (511A) and the stirring barrel inner cover (511B) are also provided with reinforcing ribs (511C);
The stirring barrel outer cover (511A) is provided with a cooling circulating water inlet (512) and a cooling circulating water outlet (513), cooling circulating water flows in from the cooling circulating water inlet (512), and cooling circulating water flows out from the cooling circulating water outlet (513);
The stirring device is characterized by further comprising a planetary transmission mechanism (529), wherein the upper end of the planetary transmission mechanism (529) is connected with an output shaft of the transmission, a stirring arm (530) is arranged at the lower end of the planetary transmission mechanism (529), and a stirring blade (531) is fixedly connected to the bottom of the stirring arm (530);
The bottom of the planetary mixer is also provided with a finished product discharge hole (532);
still include motor (518), gear, belt drive (527), derailleur (528), wherein the gear has high-speed gear and low-speed gear, still be equipped with the stirring main shaft in agitator casing (511), the power of motor (518) loops through gear the belt drive (527) derailleur (528) transmit to the stirring main shaft, and then drive cover is established stirring arm (530) on planetary drive (529) and is set up stirring vane (531) rotation at the outermost end.
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| CN112847815A (en) * | 2021-02-24 | 2021-05-28 | 山推建友机械股份有限公司 | UHPC dry-mixing stirring equipment |
| CN113334576B (en) * | 2021-06-10 | 2022-05-17 | 泗县汉能诚信电气工程有限公司 | A multi-functional stirring station for BIPV assembled building |
| CN113386256A (en) * | 2021-06-29 | 2021-09-14 | 保利长大工程有限公司 | Stirring process for UHPC industrial production |
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