CN110549497A - Planetary stirring type UHPC stirring production process and complete equipment - Google Patents
Planetary stirring type UHPC stirring production process and complete equipment Download PDFInfo
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- CN110549497A CN110549497A CN201911013642.4A CN201911013642A CN110549497A CN 110549497 A CN110549497 A CN 110549497A CN 201911013642 A CN201911013642 A CN 201911013642A CN 110549497 A CN110549497 A CN 110549497A
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- 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
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- 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
The invention provides a planetary stirring type UHPC stirring production complete equipment, which comprises: the device 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; the feeding system comprises at least one set of aggregate lifting system, a weighing hopper and a mixture horizontal conveying device; the lifting mechanism powder feeding system comprises a first conveying pipe, a first powder bin group, a weighing hopper, a second conveying pipe and a second powder bin group, and 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 and lifting device, a first steel fiber screening and distributing machine, a second steel fiber metering and lifting device and a second steel fiber screening and distributing machine; the stirring system comprises at least one planetary stirrer. All performance parameters are obviously improved, which shows that the optimization of the production process and the equipment structure has obvious effect on improving the product quality.
Description
Technical Field
the invention relates to a planetary stirring type 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 a short for Ultra-High Performance Concrete (Ultra-High Performance Concrete), which is a generic name for cement-based composite materials having a compressive strength of over 150MPa, Ultra-High toughness and Ultra-long durability internationally, mainly comprises quartz sand, silica fume, cement, a water reducing agent, steel fibers and other materials, is constructed according to the principle of maximum compactness, and has Ultra-low water-cement ratio and porosity, so that defects (pores and microcracks) inside the materials can be minimized.
The UHPC material does not contain coarse aggregate, the particle size of the particles is generally less than 1mm, 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, because the fine steel fibers dispersed in the UHPC can greatly slow down the expansion of micro cracks in the material, the material has ultrahigh toughness and ductility, is the most advanced cement-based civil engineering material in the world at present, and due to the excellent mechanical property and durability, the UHPC has wide application prospect in the field of bridge tunnels and national defense engineering under the background that the requirement of bridge engineering on light weight, high strength, quick erection and durability is required.
However, because the cement content of UHPC is higher and the water content is lower than that of ordinary cement concrete, the UHPC has high hydration heat and large shrinkage in the preparation and casting processes, and a structure crack is easy to form, thereby limiting the application of the UHPC in large-scale concrete engineering.
Through experimental research, the following results are found: the UHPC mixture is subjected to hydration reaction from the beginning of entering a mold, the temperature gradually and slowly rises, the hydration heat release quantity is rapidly increased after the UHPC mixture enters the mold after about 10 hours, the hydration heat release rate is gradually reduced until about 20 hours, the hydration heat release is mainly concentrated in 10-20 hours, the entering mold temperature of the UHPC mixture can be obviously reduced by adding crushed ice, so that the temperature peak of a central point is reduced, the time required for melting the crushed ice is prolonged, the mixing time of the UHPC material is prolonged, the production efficiency is reduced, and the consumption of the mixing power is increased. Meanwhile, when the thickness of the 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 are easily generated in the internal structure due to stress imbalance. The temperature stress generated by hydration heat during UHPC production is not negligible.
in summary, the UHPC material production process and production equipment have the following problems: casting cracks are easily caused by heat generated by hydration heat in the stirring production process, the power consumption in the production process is high, and the production rate is low.
Disclosure of Invention
The invention aims to provide a planetary stirring type UHPC stirring production process and complete equipment, which can effectively solve the problems of irregular UHPC stirring process flow, high power required by equipment driving, low production efficiency, casting cracks caused by heating in the mixture stirring process and the like.
In order to solve the problems, the invention provides a planetary stirring type UHPC stirring production complete equipment, which comprises: the device 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; the feeding system comprises at least one set of aggregate lifting system, a weighing hopper and a mixture horizontal conveying device; the lifting mechanism powder feeding system comprises a first conveying pipe, a first powder bin group, a weighing hopper, a second conveying pipe and a second powder bin group, and 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 and lifting device, a first steel fiber screening and distributing machine, a second steel fiber metering and lifting device and a second steel fiber screening and distributing machine; the stirring system comprises at least one planetary stirrer.
Furthermore, the aggregate lifting system in the planetary stirring type 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 lifting hopper, the aggregate vertical lifting device, the aggregate horizontal moving device and the four aggregate bins 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 aggregates.
Further, the water and additive system in the planetary stirring type UHPC stirring production complete equipment also comprises an air pump, and the air pump is used for injecting air into the water.
further, the gas injected by the gas pump in the planetary stirring type UHPC stirring production complete equipment is carbon dioxide or nitrogen.
Further, the first steel fiber metering and lifting device in the planetary stirring type 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.
Further, the planetary stirrer in the planetary stirring type UHPC stirring production complete equipment comprises a stirring barrel shell, wherein the stirring barrel shell comprises a stirring barrel outer cover and a stirring barrel inner cover, and an accommodating space is formed between the stirring barrel outer cover and the stirring barrel inner cover and used for storing cooling circulating water; reinforcing ribs are arranged on the outer stirring barrel cover and the inner stirring barrel cover; the stirring barrel outer cover is provided with a cooling circulating water inlet and a cooling circulating water outlet, cooling circulating water flows in from the cooling circulating water inlet, and flows out from the cooling circulating water outlet after being cooled; the stirring device also comprises a planetary transmission mechanism, the upper end of the planetary transmission mechanism is connected with an output shaft of the speed changer, the lower end of the planetary transmission mechanism is provided with a stirring arm, and the bottom of the stirring arm is fixedly connected with a stirring blade; a finished product discharge port is also formed at the bottom of the planetary stirrer; still include motor, gear, belt drive, derailleur, wherein the gear has high-speed gear and low-speed gear, still is equipped with the stirring main shaft in the agitator casing, and the power of motor loops through gear, belt drive, derailleur and transmits to the stirring main shaft, and then the driving sleeve establishes the stirring arm on planetary drive and sets up the stirring vane rotation at the outermost end.
On the other hand, the planetary stirring type UHPC stirring production process comprises the following steps: feeding quartz sand, feeding powder, feeding water and an additive, feeding steel fiber and stirring; the feeding step of the quartz sand comprises the steps of weighing quartz sand aggregates according to a ratio and then transmitting the quartz sand aggregates to a single horizontal shaft type stirring system; the powder feeding step is that the cement and the silicon powder required in the mixing process are weighed according to the proportion and then transmitted to a single horizontal shaft type stirring system; the water and additive feeding step comprises the steps of firstly injecting gas into water required in the mixing process through an air pump, dissolving the gas, then weighing the water and the additive required in the mixing process according to the proportion, and then transmitting the water and the additive to a single horizontal shaft type stirring system; the steel fiber feeding step is that the steel fibers required in the mixing process are weighed according to the proportion and then transmitted to a single horizontal shaft type stirring system; the stirring step is that the circulating step of the cooling circulating water is started firstly, ice water with the temperature close to 0 ℃ enters a cavity in the stirring barrel shell from the inlet of the cooling circulating water through a conveying pipeline, exchanges heat with the inside of the stirring barrel through the inner cover of the stirring barrel, flows out from the outlet of the cooling circulating water and flows back through the pipeline, then the motor is started to stir, and the stirring barrel shell can be always in a low-temperature state in the stirring process.
By adopting the production process and the equipment, various performance parameters of the UHPC concrete structure are obviously improved, which shows that the optimization of the production process and the equipment structure has obvious effect on improving the product quality.
Drawings
FIG. 1 is a schematic diagram of an embodiment of the present invention.
FIG. 2 is a front view of the overall structure of the plant of the present invention.
FIG. 3 is a top view of the overall structure of the plant of the present invention.
FIG. 4 is a side view of the main building of the 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 view of the planetary stirring system transmission mechanism of the present invention.
Reference numerals:
1: feeding system
11: aggregate lifting system
1101: aggregate elevator bucket
1102: vertical lifting device for aggregate
1103: aggregate horizontal moving device
1104: aggregate bin
12: weighing hopper
13: horizontal conveying device for mixed materials
2: powder feeding system of lifting mechanism
21: first material conveying pipe
22: first powder bin group
2201: first powder bin
23: first weighing hopper
24: second material conveying pipe
25: second powder 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: additive mixing and dissolving device
4: steel fiber feeding system
41: first steel fiber metering and lifting device
4101: first steel fiber metering device
4102: first steel fiber vertical lifting device
4103: first steel fiber horizontal conveying device
42: first steel fiber screening and distributing machine
43: second steel fiber metering and lifting device
4301: second steel fibre metering device
4301: second steel fiber vertical lifting device
4303: second steel fiber horizontal conveying device
44: second steel fiber screening and distributing machine
5: planetary stirring system
51: first planetary mixer
511: mixing drum shell
511A: mixing drum outer cover
511B: inner cover of mixing drum
511C: reinforcing rib
512: cooling circulating water inlet
513: cooling circulating water outlet
514: electric push rod
515: low-speed stirring controller
516: high-low speed control shifting fork
517: high-speed stirring controller
518: electric machine
519: motor output shaft
520: sliding key
521: sliding gear
522: high-speed output gear
523: low-speed output gear
524: duplicate gear
525: transmission key
526: high-low speed control output shaft
527: belt wheel transmission device
528: speed variator
529: transmission output gear
530: stirring arm
531: stirring blade
532: finished product material discharge door
533: discharge hopper
52: second planetary mixer
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings in conjunction with the following detailed description. It should be understood that the description is intended to be exemplary only, and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings in conjunction with the following detailed description. It should be understood that the description is intended to be exemplary only, and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of 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 agitator UHPC agitator manufacturing plant of the present embodiment is shown below, comprising: a feeding system 1, powder 2, a water and additive adding system 3, a steel fiber feeding system 4 and a planetary stirring system 5.
the feeding system 1 is described below, the feeding system 1 includes 2 sets of aggregate lifting systems 11, a weighing hopper 12, and a mixture horizontal conveying device 13, the aggregate lifting system 11 includes 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 sizes of stored aggregates. When the aggregate bin 1104 needs to be charged, the aggregates firstly enter the aggregate vertical lifting device 1102 through the aggregate lifting hopper 1101, are lifted to the top, and then are conveyed into the aggregate bin 1104 through the aggregate horizontal moving device 1103.
Next, a powder feeding system 2 will be described, wherein the powder feeding system 2 comprises a first powder conveying pipe 21, a first powder bin group 22, a weighing hopper 23, a second powder conveying pipe 24 and a second powder bin group 25, as the powder materials required in the mixing process comprise cement and silica fume, two powder material bin groups are provided, wherein, the first powder bin group 22 comprises a first powder bin 2201, the second powder bin group 25 comprises a second powder bin 2501, when powder needs to be filled, under the action of high-pressure gas, the powder is respectively blown into the first powder bin 2201 and the second powder bin 2501 through the first material conveying pipe 21 and the second material conveying pipe 24, and during production, the cement in the first silo group 2201 is conveyed to the first weighing hopper 23 by the screw conveyer 2502 for accumulative weighing and metering, and the silica fume in the second powder bin group 2501 is conveyed to the second weighing hopper 26 by the screw conveyer 2502 for cumulative weighing.
next, a water and additive adding system 3 is introduced, wherein the water and additive system 3 comprises 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 during the mixing process is very large, and the pumping process is also relatively high, a special concrete pumping device is needed to pump, and the pumping adaptability is poor, the water and additive adding system 3 can further 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, so that the water with the dissolved gas participates in the mixing process, the added gas is released from the water, and can also absorb heat, so that the temperature during the mixing process is reduced, and a large number of micro bubbles are formed inside the UHPC material, thereby effectively reducing the viscosity, reducing the mixing resistance, and also effectively reducing the resistance during the pumping process.
Introducing a steel fiber feeding system 4, 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, 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 steel fibers are unpacked, conveyed into the first steel fiber metering and lifting device 41, weighed and metered by the first steel fiber metering device 4101, lifted to the top of the complete equipment by the first steel fiber vertical lifting device 4102, and conveyed to the first steel fiber screening and distributing machine 42 by the first steel fiber horizontal conveying device 4103 to enter a screening program; similarly, the second steel fiber metering and lifting device 43 includes a second steel fiber metering device 4301, a second steel fiber vertical lifting device 4302, and a second steel fiber horizontal conveying device 4303, the steel fibers are unpacked and then sent to the second steel fiber metering and lifting device 43, and then weighed and metered by the second steel fiber metering device 4301, and lifted to the top of the plant by the second steel fiber vertical lifting device 4302, and then conveyed to the second steel fiber screening and distributing machine 44 by the second steel fiber horizontal conveying device 4303, so as to enter the screening procedure.
next, the planetary stirring system 5 is described, the stirring system 5 includes a first planetary stirrer 51 and a second planetary stirrer 52, both of which are produced in cooperation, while one mixer may be producing, the other mixer may be mixing, as described below with reference to the first planetary mixer 51, the first planetary mixer 51 includes a mixer drum housing 511, wherein the stirring barrel shell 511 comprises a stirring barrel outer cover 511A and a stirring barrel inner cover 511B, a containing space is provided between the stirring barrel outer cover 511A and the stirring barrel inner cover 511B for storing cooling circulating water, and simultaneously for strengthening the strength, 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 flows out from the cooling circulating water outlet 513 after being cooled; the upper end of the planetary transmission mechanism 529 is connected with the output shaft of the speed changer, the lower end of the planetary transmission mechanism is provided with a stirring arm 530, and the bottom of the stirring arm 530 is fixedly connected with the stirring blade 532. A finished product discharge port 532 is further arranged at the bottom of the first planetary mixer 51, and a discharge hopper 533 is further arranged at the bottom of the finished product discharge port 532.
A plurality of vent pipes can be uniformly arranged at the bottom of the stirring barrel shell 511, a plurality of vent holes are uniformly arranged on the vent pipes, and the vent pipes inject gas into the stirring barrel shell 511 through an air pump, so that the gas can be injected into the stirring process, the viscosity of concrete can be effectively reduced, and the temperature in the stirring process can be better reduced. Preferably, to better reduce problems, the injected gas may be a cryogenic gas (temperature below 10 degrees celsius).
the power of the motor 518 is transmitted to the star gear 529 through the gear shifter and the gear box 528 in sequence, so that the stirring blade 532 is driven to rotate, the gear shifter has two gears of a high gear and a low gear, and the high gear and the low gear can be selected according to actual use. The specific driving structure is as follows: the motor is provided with a motor output shaft 519, the gear engaging device comprises a high-speed output gear 522, a sliding gear 521 and a low-speed output gear 523 which are sequentially sleeved on the motor output shaft 519, the sliding gear 521 is fixed on the motor output shaft 519 in the radial direction through a sliding key 520, the high-speed output gear 522 and the low-speed output gear 523 are both meshed with a duplicate gear 524 sleeved on a high-low speed control output shaft 526, the duplicate gear 524 is fixed on the high-low speed control output shaft 526 in the radial direction through a transmission key 525, in order to switch between a high-speed state and a low-speed state, a high-low speed control shifting fork 516 is further arranged, the high-low speed control shifting fork 516 is switched between the high-speed state and the low-speed state under the action of an electric push rod 514, correspondingly, a low-speed stirring controller 515 and a high-speed stirring controller 517 are arranged at two limit positions of the high-low speed control shifting fork 516, the electric push rod 514, when the high-speed and low-speed control shifting fork 516 touches the low-speed stirring controller 515 or the high-speed stirring controller 517, the action is stopped, when the low-speed stirring controller 515 is touched, the external teeth of the sliding gear 521 are completely sleeved with the internal teeth of the low-speed output gear 523, correspondingly, when the high-speed stirring controller 517 is touched, the external teeth of the sliding gear 521 are completely sleeved with the internal teeth of the high-speed output gear 522, so that the motor 518 can obtain two different rotating speeds of high speed and low speed. The transmission 528 then transmits power through the belt drive 527 to the transmission 528, and the transmission 528, after completing the downshift, transmits power to the star gear 529. The second planetary mixer 52 is identical to the first planetary mixer 51 in structure and will not be described herein.
The stirring production process based on the complete equipment is shown below, and specifically 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 comprises weighing quartz sand aggregates according to a ratio and then conveying the weighed quartz sand aggregates to a planetary stirring system 5; the powder feeding step is that the cement and the silicon powder required in the mixing process are weighed according to the proportion and then transmitted to a planetary stirring system 5; the water and additive feeding step is that the water and the additive required in the mixing process are weighed according to the proportion and then transmitted to the planetary stirring system 5; the steel fiber feeding step is that the steel fibers required in the mixing process are weighed according to the proportion and then transmitted to a planetary stirring system 5; the stirring step is that the circulating step of the cooling circulating water is started firstly, ice water with the temperature close to 0 ℃ enters a cavity in the stirring barrel shell 511 from the cooling circulating water inlet 512 through a conveying pipeline, exchanges heat with heat in the stirring barrel through the inner cover 511B of the stirring barrel, flows out from the cooling circulating water outlet 513 and flows back through the pipeline, then the motor is started for stirring, and the stirring barrel shell can be in a low-temperature state all the time in the stirring process. And the electric push rod 514 drives the high-low speed control shift fork 516 through an automatic control program so as to switch between the low speed state and the high speed state. Since the planetary stirring system 5 includes two sets of mixers, namely the first planetary mixer 51 and the second planetary mixer, when one of the mixers is stirring, the other mixer can be prepared, so that the planetary stirring system can continuously work.
Taking a 2-square planetary stirring UHPC stirrer commonly used at present as an example, the motor power is 110Kw, and after the high-low speed driving conversion mode is changed, the motor power is 90Kw, and the energy-saving effect is obvious.
In order to verify the superiority and effectiveness of the UHPC stirring production process, the table 1 shows the proportion of a single label of a certain UHPC, the table 2 shows the change of the temperature of the UHPC mixture produced by the traditional process and the UHPC mixture produced by the process along with time, and the table 3 shows the comparison of the performance test results of the UHPC mixture produced by the traditional process and the UHPC mixture produced by the process.
Table 1 shows the ratio of a single label for a certain UHPC (unit: kg/m 3)
| The materials used | UHPC dry powder | Water (W) | Steel fiber |
| Specific gravity of | 2242 | 157 | 173 |
TABLE 2 ambient temperature 28 deg.C for the case of time-dependent changes in the temperature of the UHPC blend produced by the conventional process and that of the UHPC blend produced by the present process
Table 3 shows the comparison of the performance test results of the UHPC mixture in the conventional process flow and the present process flow
As is apparent from the results in Table 2, by adopting the production process and the equipment of the invention, the temperature of the UHPC mixture is kept in a low temperature state after 100 minutes, which is favorable for counteracting the high temperature of a concrete structure caused by the concentrated release of hydration heat within 10-20 hours after the UHPC mixture is poured into a mold, preventing the generation of pouring cracks and improving the quality of the structure.
As is evident from the results in Table 3, the production process and equipment of the present invention significantly improve various performance parameters of UHPC concrete structures, which indicates that the optimization of the production process and equipment structure has significant 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 explaining the principles of the invention and are not to be construed as limiting the invention. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.
Claims (7)
1. a planetary stirring type UHPC stirring production complete equipment is characterized by comprising:
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 single horizontal shaft type stirring system (5);
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) and an additive mixing and dissolving device (33);
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 stirring system (5) comprises at least one planetary stirrer.
2. The planetary agitated UHPC agitation production plant of claim 1, wherein:
The aggregate lifting system (11) comprises an aggregate lifting hopper (1101), an aggregate vertical lifting device (1102), an aggregate horizontal moving device (1103) and four aggregate bins (1104), wherein the aggregate lifting hopper is divided into 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 aggregates.
3. the planetary agitated UHPC agitation production plant of claim 1, wherein:
The water and additive system (3) further comprises an air pump for injecting air into the water.
4. The planetary agitated UHPC agitation production plant of claim 3, wherein:
The gas injected by the gas pump is carbon dioxide or nitrogen.
5. The planetary agitated UHPC agitation production plant 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 stirred UHPC stirred production plant according to claim 5, wherein:
The planetary mixer comprises a mixing barrel shell (511), wherein the mixing barrel shell (511) comprises a mixing barrel outer cover (511A) and a mixing barrel inner cover (511B), and an accommodating space is formed between the mixing barrel outer cover (511A) and the mixing 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 a reinforcing rib (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 flows out from the cooling circulating water outlet (513) after being cooled;
The stirring device is characterized by further comprising a planetary transmission mechanism (529), 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 stirring blades (531) are fixedly connected to the bottom of the stirring arm (530);
A finished product discharge hole (533) is also formed in the bottom of the planetary stirrer;
Still include motor (518), gear shifter, belt transmission (527), derailleur (528), wherein the gear shifter has high-speed gear and low-speed gear, still be equipped with stirring main shaft (531) in agitator casing (511), the power of motor (518) loops through the gear shifter belt transmission (527) transmission to stirring main shaft (531), and then the driving sleeve is established and is rotated at stirring arm (530) on planetary drive mechanism (529) and setting stirring vane (531) in the outermost end.
7. A planetary stirring type UHPC stirring production process is characterized by comprising the following steps:
Feeding quartz sand, feeding powder, feeding water and an additive, feeding steel fiber and stirring;
the feeding step of the quartz sand comprises the steps of weighing quartz sand aggregates according to a ratio and then transmitting the quartz sand aggregates to a single horizontal shaft type stirring system; the powder feeding step is that the cement and the silicon powder required in the mixing process are weighed according to the proportion and then transmitted to a single horizontal shaft type stirring system;
The water and additive feeding step comprises the steps of firstly injecting gas into water required in the mixing process through an air pump, dissolving the gas, then weighing the water and the additive required in the mixing process according to the proportion, and then transmitting the water and the additive to a single horizontal shaft type stirring system;
The steel fiber feeding step is that the steel fibers required in the mixing process are weighed according to the proportion and then transmitted to a single horizontal shaft type stirring system;
the stirring step is that the circulating step of the cooling circulating water is started firstly, ice water with the temperature close to 0 ℃ enters a cavity in the stirring barrel shell from the inlet of the cooling circulating water through a conveying pipeline, exchanges heat with the inside of the stirring barrel through the inner cover of the stirring barrel, flows out from the outlet of the cooling circulating water and flows back through the pipeline, then the motor is started to stir, and the stirring barrel shell can be always in a low-temperature state in the stirring process.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911013642.4A CN110549497A (en) | 2019-10-23 | 2019-10-23 | Planetary stirring type UHPC stirring production process and complete equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911013642.4A CN110549497A (en) | 2019-10-23 | 2019-10-23 | Planetary stirring type UHPC stirring production process and complete equipment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113334576A (en) * | 2021-06-10 | 2021-09-03 | 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 |
-
2019
- 2019-10-23 CN CN201911013642.4A patent/CN110549497A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113334576A (en) * | 2021-06-10 | 2021-09-03 | 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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