CN215319497U - UHPC pre-mixing production line - Google Patents

Abstract

The utility model discloses a UHPC pre-mixing production line, which is characterized in that UHPC dry-mixing and pre-mixing are carried out in advance, and a plurality of movable wet-mixing machines are arranged according to the construction progress requirement in later-stage field construction, so that the yield and the construction efficiency of UHPC finished products are improved, the metering precision is ensured, and the quality is improved.

Description

UHPC pre-mixing production line

Technical Field

The utility model relates to the technical field of building materials, in particular to a UHPC (ultra high performance polycarbonate) pre-mixing production line.

Background

The ultra-high performance concrete is called UHPC for short, and is also called as reactive powder concrete. UHPC is a high-strength, high-toughness and low-porosity ultrahigh-strength cement-based material, and the basic preparation principle is as follows: by improving the fineness and activity of the tissue components and not using coarse aggregate, the pores and microcracks in the material are minimized, so that ultrahigh strength and high durability are obtained. The ultra-high performance concrete has ultra-high durability and ultra-high mechanical properties (compression resistance, tensile resistance and high toughness). Because of light weight and reliable performance, the material has wide application prospect in construction engineering and national defense engineering.

At present, the UHPC mixture stirring equipment at home and abroad is mainly an integrated machine similar to ordinary cement concrete stirring, because the UHPC relates to various raw materials such as gelling, steel fiber and the like, an ordinary cement concrete stirring cylinder cannot well realize the batching and weighing, a large amount of manpower and auxiliary machinery are needed for feeding materials, the environmental pollution is serious, and the mechanical automation production degree is not high. The UHPC-based raw material is added with steel fibers, and the characteristics of the UHPC-based raw material are that the steel fibers are easy to agglomerate and not easy to break up; meanwhile, compared with common cement concrete, UHPC has high content of cementing materials such as cement, low water content and low water-cement ratio, so that the time required for stirring is about more than 10 minutes to achieve the effect of uniform stirring, the stirring efficiency and the yield are low, and the quality and the progress of field construction are influenced. Meanwhile, the measurement accuracy of each raw material, namely the coincidence degree of the raw material and the design proportion is not high, and the final quality of the UHPC is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a UHPC pre-mixing production line, which carries out UHPC dry-mixing and pre-mixing in advance, and arranges a plurality of movable wet-mixing machines according to the construction progress requirement in later-stage field construction, thereby improving the yield and construction efficiency of UHPC finished products, ensuring the metering precision and improving the quality.

The technical purpose of the utility model is realized by the following technical scheme: 1. the method comprises the following steps: the cement, fine quartz sand and coarse quartz sand conveying and weighing system comprises a cement tank, a high-pressure air pump for pumping cement into the cement tank, a fine quartz sand tank, a coarse quartz sand tank, a first lifting and conveying device for conveying coarse quartz sand and fine quartz sand into the fine quartz sand tank and the coarse quartz sand tank, a first accumulation scale, a plurality of first screw conveyors, a plurality of first pneumatic butterfly valves, a first transition bin and a feeding device for conveying raw materials in the first accumulation scale into a first filter bin; the first screw conveyors respectively and sequentially convey the raw materials in the cement tank, the fine quartz sand tank and the coarse quartz sand tank to the first transition bin, and the first pneumatic butterfly valves are respectively arranged between the first screw conveyors and the first accumulation scale; the conveying and weighing system for the silicon ash and the fly ash comprises a silicon ash tank, a fly ash tank, a second lifting and conveying device, a second accumulation scale and two second spiral conveyors, wherein the second lifting and conveying device is used for conveying the silicon ash and the fly ash into the silicon ash tank and the fly ash tank; the steel fiber conveying and weighing system comprises a weight reduction scale, a belt conveyor for conveying steel fibers into the weight reduction scale, and a second transition bin for receiving the steel fibers output from the weight reduction scale; the stirring and premixing system comprises a stirring cylinder for receiving the raw materials from the first transition bin, the second accumulation scale and the second transition bin and stirring the raw materials.

The utility model is further provided with: the quartz sand tank comprises coarse quartz sand tanks and fine quartz sand tanks, wherein the first lifting conveying device comprises a first lifting machine for conveying fine quartz sand or coarse quartz sand, a pneumatic four-way valve for receiving materials from the first lifting machine, a third spiral conveyer communicated with one discharge end of the pneumatic four-way valve, and a first pneumatic material distributing valve communicated with the discharge end of the third spiral conveyer, the other two discharge ends of the pneumatic four-way valve are respectively communicated with the two coarse quartz sand tanks, and the two discharge ends of the first pneumatic material distributing valve are respectively communicated with the two fine quartz sand tanks.

The utility model is further provided with: the feeding device comprises a fourth screw conveyor communicated with the discharge end of the first accumulation scale and a second lifting machine communicated with the discharge end of the fourth screw conveyor and used for conveying the raw materials into the first transition bin.

The utility model is further provided with: the second lifting and conveying device comprises a third lifting machine for conveying silica fume or fly ash and a second pneumatic distributing valve communicated with the discharge end of the third lifting machine, and the two discharge ends of the second pneumatic distributing valve are respectively communicated with a silica fume tank and a fly ash tank.

The utility model is further provided with: the middle part of the belt conveyor extends upwards in an inclined mode towards the direction close to the weight reduction scale, the inclined angle of the part, extending upwards in the inclined mode, of the belt conveyor is 65-75 degrees, the weight reduction scale comprises a base, a vibration disc, a plurality of buffering rubber blocks, vibrators, a weighing sensor, a discharge channel, a screen and a return channel, the buffering rubber blocks are arranged between the base and the vibration disc, the vibrators are arranged on the outer side of the vibration disc, the weighing sensor is arranged at the joint of the buffering rubber blocks and the base and used for detecting gravity from the buffering rubber blocks, one end of the discharge channel is communicated with the discharge end of the vibration disc, the other end of the discharge channel extends downwards, the screen is arranged at one end, far away from the vibration disc, of the discharge channel, and the return channel is connected between the discharge channel and the vibration disc and used for recovering steel fibers remaining through the screen in a vibration process.

The utility model is further provided with: the first pre-throwing bin is arranged at the feed end of the first hoister, a first manual butterfly valve is arranged between the first pre-throwing bin and the feed end of the first hoister, a second pre-throwing bin is arranged at the feed end of the third hoister, a second manual butterfly valve is arranged between the second pre-throwing bin and the feed end of the third hoister, the first pre-throwing type dust remover further comprises a first pulse dust remover, a first dust removing main pipe communicated with the first pulse dust remover, a first dust removing branch pipe connected between the first dust removing main pipe and the first pre-throwing bin, a second dust removing branch pipe connected between the first dust removing main pipe and the discharge end of the first hoister, a third dust removing branch pipe connected between the first dust removing main pipe and the second pre-throwing bin, a fourth dust removing branch pipe connected between the first dust removing main pipe and the discharge end of the third hoister, and a fifth dust removing branch pipe connected between the first dust removing main pipe and the second transition bin, a third manual butterfly valve is respectively arranged at one end of each of the first dust removal branch pipe, the second dust removal branch pipe, the third dust removal branch pipe, the fourth dust removal branch pipe and the fifth dust removal branch pipe, which is far away from the first dust removal main pipe; the two cement tanks are arranged, the two cement tanks further comprise a second pulse dust collector, a second dust removal main pipe connected with the second pulse dust collector, a sixth dust removal branch pipe connected between the second dust removal main pipe and the top of one of the cement tanks, and a seventh dust removal branch pipe connected between the second dust removal main pipe and the top of the other cement tank, wherein one ends, far away from the second dust removal main pipe, of the sixth dust removal branch pipe and the seventh dust removal branch pipe are respectively provided with a fourth manual butterfly valve.

The utility model is further provided with: first transition storehouse, second accumulate the balance and lie in the top of agitator tank, still include the third pulse dust remover, the third dust removal that is connected with the third pulse dust remover is responsible for, connect the eighth dust removal that is responsible for between and first transition storehouse in the third dust removal and divide the pipe, connect and add the ninth dust removal that the balance was responsible for and the second in the third dust removal and divide the pipe, the eighth dust removal divides the pipe, the ninth dust removal divides the one end of managing keeping away from the third dust removal and is provided with fifth manual butterfly valve respectively, the discharge end and the agitator tank top of third pulse dust remover are linked together.

In conclusion, the utility model has the following beneficial effects;

1. the factory centralized and continuous intelligent production of the UHPC premix is realized to a higher degree. The existing UHPC premixing (dry mixing) field mostly adopts an open-air intermittent production mode of metering-lifting-production-metering-lifting-production, and fails to realize a closed continuous production mode of 'lifting raw materials into a tank + automatic batching-metering + temporary storage + continuous production'. The production line realizes the production mode by effectively combining material pertinence analysis and mechanical principle, and has better production capacity; meanwhile, UHPC dry-mixing and pre-mixing are carried out in advance, and a plurality of movable wet-mixing machines are arranged according to the construction progress requirement in later-stage field construction, so that the yield and the construction efficiency of UHPC finished products are improved, the metering precision is ensured, and the quality is improved;

2. by analyzing the characteristics of the UHPC raw materials and adopting different conveying and storing modes of the raw materials, the basic physical performance of the raw materials is ensured, the mechanical storage and distribution work of the raw materials of the UHPC is effectively solved, and the manual work intensity is reduced; for example, cement, fine quartz sand and coarse quartz sand are conveyed in a spiral conveying mode, and accumulated weighing is carried out through a first accumulation scale, so that the metering precision of each raw material is ensured; the silica fume and the fly ash are fine in material particles and small in volume weight, and in order to reduce mass loss and guarantee metering precision, storage and weighing work of the silica fume and the fly ash are arranged above the stirring cylinder, and the silica fume and the fly ash directly enter the stirring cylinder after metering; the steel fiber has the characteristics of large input amount and easy agglomeration, the conveying amount is increased by conveying through the belt conveyor, the dispersion degree is improved by scattering the steel fiber through the vibration of the weight reduction scale, the steel fiber is conveniently and uniformly stirred in the stirring cylinder, and the large-inclination-angle belt conveyor (the inclination angle is 65-75 degrees) avoids the problem of high labor intensity caused by directly conveying the steel fiber to a high height for feeding, and is convenient for supplementing and measuring the steel fiber;

3. the cement, the coarse quartz sand, the fine quartz sand, the silica fume and the fly ash are stored and managed in a closed mode, and are not in contact with the external connection, so that the original characteristics of raw materials are guaranteed to the maximum extent, and the product quality is guaranteed;

4. the design theory of UHPC is the maximum packing density theory, in which particles of different particle sizes of the constituent materials form the closest packing in an optimal proportion, i.e., the gaps where millimeter-sized particles (aggregates) are packed are filled with micron-sized particles (cement, fly ash, mineral powder), and the gaps where micron-sized particles are packed are filled with submicron-sized particles (silica fume). The volatilization loss of the micron-sized and submicron-sized particle diameter materials in the production process is easy to form fine holes of the mixture, and the strength of the concrete is greatly reduced. Aiming at the problem of volatilization loss of fine particles in the blanking and stirring processes, dust generated in the blanking process of the first transition bin and the second accumulation scale is recovered in a pulse dust removal (third pulse dust remover) mode, and the recovered dust is put into a stirring cylinder, so that the core composition of a core material is ensured not to be lost;

5. the whole process of feeding production is closed, pulse dust removal is carried out, the whole production field is closed by a canopy, workshop type management is adopted, the emission standard is far higher than the emission standard, and the requirements of green environment-friendly stations are met.

Drawings

FIG. 1 is a schematic diagram of the operation of the embodiment (the position of the belt conveyor is shifted up in the figure so that the belt conveyor does not overlap other components);

FIG. 2 is a schematic diagram of the operation of the cement, fine quartz sand and coarse quartz sand conveying and weighing system of the embodiment;

FIG. 3 is a schematic diagram of the conveying and weighing system for silica fume and fly ash in the embodiment;

FIG. 4 is a schematic diagram of the operation of the steel fiber conveying and weighing system in the embodiment (the positions of the belt conveyor and the weight-reducing scale are actual positions in the diagram);

FIG. 5 is a schematic structural diagram of a weight reduction scale in an embodiment;

FIG. 6 is a top view of an embodiment weight loss scale;

fig. 7 is a partial schematic diagram of the operation of the embodiment (for embodying the third pulse dust collector).

Reference numerals: 1. a cement silo; 2. a high pressure air pump; 3. a fine quartz sand tank; 4. a coarse quartz sand tank; 51. a first hoist; 52. a pneumatic four-way valve; 53. a third screw conveyor; 54. a first pneumatic material distributing valve; 6. a first accumulation scale; 7. a first screw conveyor; 8. a first pneumatic butterfly valve; 9. a first transition bin; 101. a fourth screw conveyor; 102. a second hoist; 11. a silica fume tank; 12. a fly ash tank; 131. a third hoisting machine; 132. a second pneumatic material distributing valve; 14. a second accumulation scale; 15. a second screw conveyor; 16. a weight loss scale; 161. a base; 162. a vibrating pan; 163. buffering the rubber block; 164. a vibrator; 165. a weighing sensor; 166. a discharge channel; 167. screening a screen; 168. a feed back channel; 17. a belt conveyor; 18. a second transition bin; 19. a mixing tank; 20. a first pre-throwing bin; 21. a first manual butterfly valve; 22. a second pre-throwing bin; 23. a second manual butterfly valve; 24. a first pulse dust collector; 241. a first main dust removal pipe; 242. a first dust removal branch pipe; 243. a second dust removal branch pipe; 244. a third dedusting branch pipe; 245. a fourth dedusting branch pipe; 246. fifth dedusting branch pipe; 247. a third manual butterfly valve; 25. a second pulse dust collector; 251. a second main dedusting pipe; 252. a sixth dedusting branch pipe; 253. a seventh dust removal branch pipe; 254. a fourth manual butterfly valve; 26. a third pulse dust collector; 261. a third dust removal main pipe; 262. an eighth dedusting branch pipe; 263. a ninth dust removal branch pipe; 264. and a fifth manual butterfly valve.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Example (b): a UHPC ready mix line, as shown in figures 1 to 4, comprises four major parts: cement, fine quartz sand and coarse quartz sand conveying and weighing system; conveying and weighing system for silica fume and fly ash; a steel fiber conveying and weighing system; a stirring and premixing system.

As shown in fig. 1 and 2, the cement, fine quartz sand and coarse quartz sand conveying and weighing system comprises a cement tank 1, a high-pressure air pump 2 for pumping cement into the cement tank 1, a fine quartz sand tank 3, a coarse quartz sand tank 4, a first lifting and conveying device for conveying coarse quartz sand and fine quartz sand into the fine quartz sand tank 3 and the coarse quartz sand tank 4, a first accumulation scale 6, a plurality of first screw conveyors 7, a plurality of first pneumatic butterfly valves 8, a first transition bin 9, and a feeding device for conveying raw materials in the first accumulation scale 6 into a first filter bin. A plurality of first screw conveyer 7 respectively with cement jar 1, thin quartz sand jar 3 and the raw and other materials spiral delivery in the thick quartz sand jar 4 in proper order in first transition bin 9, a plurality of first pneumatic butterfly valves 8 set up respectively between a plurality of first screw conveyer 7 and first accumulation balance 6.

As shown in fig. 2, two cement tanks 1, two coarse quartz sand tanks 4, and two fine quartz sand tanks 3 are provided, the first lifting and conveying device includes a first lifter 51 for conveying fine quartz sand or coarse quartz sand, a pneumatic four-way valve 52 for receiving materials from the first lifter 51, a third screw conveyor 53 communicated with one of the discharge ends of the pneumatic four-way valve 52, and a first pneumatic material distributing valve 54 communicated with the discharge end of the third screw conveyor 53, the remaining two discharge ends of the pneumatic four-way valve 52 are respectively communicated with the two coarse quartz sand tanks 4, and the two discharge ends of the first pneumatic material distributing valve 54 are respectively communicated with the two fine quartz sand tanks 3. The feeding device comprises a fourth screw conveyor 101 communicated with the discharge end of the first accumulation scale 6 and a second elevator 102 communicated with the discharge end of the fourth screw conveyor 101 and used for conveying the raw materials into the first transition bin 9.

As shown in fig. 1 and 3, the conveying and weighing system for silica fume and fly ash comprises a silica fume tank 11, a fly ash tank 12, a second lifting and conveying device for conveying silica fume and fly ash into the silica fume tank 11 and the fly ash tank 12, a second accumulation scale 14 and two second screw conveyors 15. The silica ash tank 11 and the fly ash tank 12 are located above the second accumulation scale 14, the two second screw conveyors 15 respectively screw raw materials in the silica ash tank 11 and the fly ash tank 12 to the second accumulation scale 14, and a pneumatic butterfly valve (not marked in the figure) is arranged between the second screw conveyor 15 and the second accumulation scale 14. The second lifting and conveying device comprises a third lifting machine 131 for conveying silica fume or fly ash and a second pneumatic distributing valve 132 communicated with the discharge end of the third lifting machine 131. Two discharging ends of the second pneumatic distributing valve 132 are respectively communicated with the silica ash tank 11 and the fly ash tank 12.

As shown in fig. 1, 4 to 6, the steel fiber conveying and weighing system includes a weight-reducing scale 16, a belt conveyor 17 for conveying the steel fibers into the weight-reducing scale 16, and a second transition bin 18 for receiving the steel fibers output from the weight-reducing scale 16. The middle part of the belt conveyor 17 extends obliquely upwards towards the direction close to the weight-reducing scale 16, the oblique angle of the obliquely upwards extending part of the belt conveyor 17 is 65-75 degrees (72 degrees in the figure), the weight-reducing scale 16 comprises a base 161, a vibration disc 162, a plurality of buffering rubber blocks 163 connected between the base 161 and the vibration disc 162, vibrators 164 arranged on the outer side of the vibration disc 162, a weighing sensor 165 arranged at the joint of the buffering rubber blocks 163 and the base 161 and used for detecting the gravity from the buffering rubber blocks 163, a discharge channel 166 with one end communicated with the discharge end of the vibration disc 162 and the other end extending downwards, a screen 167 arranged at one end of the discharge channel 166 far away from the vibration disc 162, and a return channel 168 connected between the discharge channel 166 and the vibration disc 162 and used for recovering the steel fibers which are agglomerated through the screen 167 in the vibration process.

As shown in fig. 1, the mixing and ready-mixing system is used for a mixing tank 19 which receives raw materials from a first transition bin 9, a second accumulation scale 14 and a second transition bin 18 and mixes the raw materials.

As shown in fig. 1, 2 and 3, a first pre-throwing bin 20 is provided at the feed end of the first hoist 51, a first manual butterfly valve 21 is provided between the first pre-throwing bin 20 and the feed end of the first hoist 51, a second pre-throwing bin 22 is provided at the feed end of the third hoist 131, and a second manual butterfly valve 23 is provided between the second pre-throwing bin 22 and the feed end of the third hoist 131. The device also comprises a first pulse dust collector 24, a first dust removal main pipe 241 communicated with the first pulse dust collector 24, a first dust removal branch pipe 242 connected between the first dust removal main pipe 241 and the first pre-throwing bin 20, a second dust removal branch pipe 243 connected between the first dust removal main pipe 241 and the discharge end of the first lifting machine 51, a third dust removal branch pipe 244 connected between the first dust removal main pipe 241 and the second pre-throwing bin 22, a fourth dust removal branch pipe 245 connected between the discharge ends of the first dust removal main pipe 241 and the third lifting machine 131, and a fifth dust removal branch pipe 246 connected between the first dust removal main pipe 241 and the second transition bin 18. The first dust removing branch pipe 242, the second dust removing branch pipe 243, the third dust removing branch pipe 244, the fourth dust removing branch pipe 245 and the fifth dust removing branch pipe 246 are respectively provided with a third manual butterfly valve 247 (only one is marked in the figure) at one end far away from the first dust removing main pipe 241. The two cement tanks 1 are provided, and the two cement tanks further comprise a second pulse dust collector 25, a second dust collection main pipe 251 connected with the second pulse dust collector 25, a sixth dust collection branch pipe 252 connected between the second dust collection main pipe 251 and the top of one of the cement tanks 1, and a seventh dust collection branch pipe 253 connected between the second dust collection main pipe 251 and the top of the other cement tank 1. And a fourth manual butterfly valve 254 is respectively arranged at one end of the sixth dust removing branch pipe 252 and one end of the seventh dust removing branch pipe 253, which are far away from the second dust removing main pipe 251.

As shown in fig. 1 and 7, the first transition bin 9 and the second accumulation scale 14 are located above the mixing tank 19, and the dust removing device further includes a third pulse dust collector 26, a third dust removing main pipe 261 connected to the third pulse dust collector 26, an eighth dust removing branched pipe 262 connected between the third dust removing main pipe 261 and the first transition bin 9, and a ninth dust removing branched pipe 263 connected between the third dust removing main pipe 261 and the second accumulation scale 14. One ends of the eighth dust removing branch pipe 262 and the ninth dust removing branch pipe 263, which are far away from the third dust removing main pipe 261, are respectively provided with a fifth manual butterfly valve 264, and the discharge end of the third pulse dust remover 26 is communicated with the top of the stirring cylinder 19.

The implementation effect is as follows: (1) the factory centralized and continuous intelligent production of the UHPC premix is realized to a higher degree. The existing UHPC premixing (dry mixing) field mostly adopts an open-air intermittent production mode of metering-lifting-production-metering-lifting-production, and fails to realize a closed continuous production mode of 'lifting raw materials into a tank + automatic batching-metering + temporary storage + continuous production'. The production line realizes the production mode by effectively combining material pertinence analysis and mechanical principle, and has better production capacity; meanwhile, UHPC dry-mixing and pre-mixing are carried out in advance, and a plurality of movable wet-mixing machines are arranged according to the construction progress requirement in later-stage field construction, so that the yield and the construction efficiency of UHPC finished products are improved, the metering precision is ensured, and the quality is improved. (2) By analyzing the characteristics of the UHPC raw materials and adopting different conveying and storing modes of the raw materials, the basic physical performance of the raw materials is ensured, the mechanical storage and distribution work of the raw materials of the UHPC is effectively solved, and the manual work intensity is reduced; for example, cement, fine quartz sand and coarse quartz sand are conveyed in a spiral conveying mode, and accumulated and weighed through the first accumulation scale 6, so that the metering precision of each raw material is ensured; the silica fume and the fly ash are fine in material particles and small in volume weight, and in order to reduce mass loss and guarantee metering precision, storage and weighing work of the silica fume and the fly ash are arranged above the stirring cylinder 19, and the silica fume and the fly ash directly enter the stirring cylinder 19 after metering; the steel fiber has the characteristics of large input amount and easy agglomeration, the conveying amount is increased by conveying through the belt conveyor 17, the dispersion degree is improved by scattering the steel fiber through the vibration of the weight reduction scale 16, the steel fiber is conveniently and uniformly stirred in the stirring cylinder 19, and the large-inclination-angle belt conveyor 17 (the inclination angle is 65-75 degrees) avoids the problem of high labor intensity caused by directly conveying the steel fiber to a high position for feeding, and the steel fiber is conveniently supplemented and metered. (3) The cement, the coarse quartz sand, the fine quartz sand, the silica fume and the fly ash are stored and managed in a closed mode, and are not in contact with the external connection, so that the original characteristics of raw materials are guaranteed to the maximum extent, and the product quality is guaranteed. (4) The design theory of UHPC is the maximum packing density theory, in which particles of different particle sizes of the constituent materials form the closest packing in an optimal proportion, i.e., the gaps where millimeter-sized particles (aggregates) are packed are filled with micron-sized particles (cement, fly ash, mineral powder), and the gaps where micron-sized particles are packed are filled with submicron-sized particles (silica fume). The volatilization loss of the micron-sized and submicron-sized particle diameter materials in the production process is easy to form fine holes of the mixture, and the strength of the concrete is greatly reduced. Aiming at the problem of volatilization loss of fine particles in the blanking and stirring processes, the dust generated in the blanking process of the first transition bin 9 and the second accumulation scale 14 is recovered in a pulse dust removal (third pulse dust remover 26) mode, and the recovered dust is put into the stirring cylinder 19, so that the core composition of the core material is ensured not to be lost. (5) The whole process of feeding production is closed, pulse dust removal is carried out, the whole production field is closed by a canopy, workshop type management is adopted, the emission standard is far higher than the emission standard, and the requirements of green environment-friendly stations are met.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.

Claims (7)

1. A UHPC pre-mixing production line is characterized in that: the method comprises the following steps:

the cement, fine quartz sand and coarse quartz sand conveying and weighing system comprises a cement tank (1), a high-pressure air pump (2) for pumping cement into the cement tank (1), a fine quartz sand tank (3), a coarse quartz sand tank (4), a first lifting and conveying device for conveying coarse quartz sand and fine quartz sand into the fine quartz sand tank (3) and the coarse quartz sand tank (4), a first accumulation scale (6), a plurality of first spiral conveyors (7), a plurality of first pneumatic butterfly valves (8), a first transition bin (9) and a feeding device for conveying raw materials in the first accumulation scale (6) into a first filter bin; the first spiral conveyors (7) respectively and sequentially convey raw materials in the cement tank (1), the fine quartz sand tank (3) and the coarse quartz sand tank (4) to a first transition bin (9), and the first pneumatic butterfly valves (8) are respectively arranged between the first spiral conveyors (7) and the first accumulation scale (6);

the conveying and weighing system for the silica fume and the fly ash comprises a silica fume tank (11), a fly ash tank (12), a second lifting and conveying device, a second accumulation scale (14) and two second spiral conveyors (15), wherein the second lifting and conveying device is used for conveying the silica fume and the fly ash into the silica fume tank (11) and the fly ash tank (12), the silica fume tank (11) and the fly ash tank (12) are positioned above the second accumulation scale (14), and the two second spiral conveyors (15) respectively convey raw materials in the silica fume tank (11) and the fly ash tank (12) into the second accumulation scale (14) in a spiral mode;

the steel fiber conveying and weighing system comprises a weight-reducing scale (16), a belt conveyor (17) for conveying steel fibers into the weight-reducing scale (16), and a second transition bin (18) for receiving the steel fibers output from the weight-reducing scale (16);

the stirring and premixing system comprises a stirring cylinder (19) for receiving raw materials from a first transition bin (9), a second accumulation scale (14) and a second transition bin (18) and stirring the raw materials.

2. A UHPC ready mix line according to claim 1, characterised in that: the quartz sand tank is characterized in that the coarse quartz sand tank (4) and the fine quartz sand tank (3) are respectively provided with two, the first lifting and conveying device comprises a first lifting machine (51) for conveying fine quartz sand or coarse quartz sand, a pneumatic four-way valve (52) for receiving materials from the first lifting machine (51), a third spiral conveyor (53) communicated with one discharge end of the pneumatic four-way valve (52) and a first pneumatic distributing valve (54) communicated with the discharge end of the third spiral conveyor (53), the other two discharge ends of the pneumatic four-way valve (52) are respectively communicated with the two coarse quartz sand tanks (4), and the two discharge ends of the first pneumatic distributing valve (54) are respectively communicated with the two fine quartz sand tanks (3).

3. A UHPC ready mix line according to claim 2, characterised in that: the feeding device comprises a fourth screw conveyor (101) communicated with the discharge end of the first accumulation scale (6) and a second lifting machine (102) communicated with the discharge end of the fourth screw conveyor (101) and used for conveying the raw materials into the first transition bin (9).

4. A UHPC ready mix line according to claim 3, characterised in that: the second lifting and conveying device comprises a third lifting machine (131) used for conveying silica fume or fly ash and a second pneumatic distributing valve (132) communicated with the discharge end of the third lifting machine (131), and two discharge ends of the second pneumatic distributing valve (132) are respectively communicated with the silica fume tank (11) and the fly ash tank (12).

5. A UHPC ready mix line according to claim 1, characterised in that: the middle part of the belt conveyor (17) extends upwards in an inclined mode towards the direction close to the weight-reducing scale (16), the inclined angle of the part, extending upwards in the inclined mode, of the belt conveyor (17) is 65-75 degrees, the weight-reducing scale (16) comprises a base (161), a vibration disc (162), a plurality of buffering rubber blocks (163) arranged between the base (161) and the vibration disc (162), a vibrator (164) arranged on the outer side of the vibration disc (162), a weighing sensor (165) arranged at the joint of the buffering rubber blocks (163) and the base (161) and used for detecting gravity from the buffering rubber blocks (163), a discharge channel (166) with one end communicated with the discharge end of the vibration disc (162) and the other end extending downwards, a screen mesh (167) arranged at one end, far away from the vibration disc (162), and a return screen mesh (166) connected between the discharge channel (166) and the vibration disc (162) and used for recovering steel fibers remaining in a lump through the screen mesh (167) in the vibration process A material channel (168).

6. A UHPC ready-mix production line according to claim 4, characterised in that: the dust removal device is characterized in that a first pre-throwing bin (20) is arranged at the feed end of the first lifting machine (51), a first manual butterfly valve (21) is arranged between the first pre-throwing bin (20) and the feed end of the first lifting machine (51), a second pre-throwing bin (22) is arranged at the feed end of the third lifting machine (131), a second manual butterfly valve (23) is arranged between the second pre-throwing bin (22) and the feed end of the third lifting machine (131), the dust removal device further comprises a first pulse dust collector (24), a first dust removal main pipe (241) communicated with the first pulse dust collector (24), a first dust removal branch pipe (242) connected between the first dust removal main pipe (241) and the first pre-throwing bin (20), a second dust removal branch pipe (243) connected between the first dust removal main pipe (241) and the discharge end of the first lifting machine (51), and a third dust removal branch pipe (244) connected between the first dust removal main pipe (241) and the second pre-throwing bin (22), A fourth dust removal branch pipe (245) connected between the first dust removal main pipe (241) and the discharge end of the third lifting machine (131), and a fifth dust removal branch pipe (246) connected between the first dust removal main pipe (241) and the second transition bin (18), wherein one ends, far away from the first dust removal main pipe (241), of the first dust removal branch pipe (242), the second dust removal branch pipe (243), the third dust removal branch pipe (244), the fourth dust removal branch pipe (245) and the fifth dust removal branch pipe (246) are respectively provided with a third manual butterfly valve (247); the two cement tanks (1) are arranged, the dust removing device further comprises a second pulse dust collector (25), a second dust removing main pipe (251) connected with the second pulse dust collector (25), a sixth dust removing branch pipe (252) connected between the second dust removing main pipe (251) and the top of one of the cement tanks (1), and a seventh dust removing branch pipe (253) connected between the second dust removing main pipe (251) and the top of the other cement tank (1), wherein one ends, far away from the second dust removing main pipe (251), of the sixth dust removing branch pipe (252) and the seventh dust removing branch pipe (253) are respectively provided with a fourth manual butterfly valve (254).

7. A UHPC ready mix line according to claim 1, characterised in that: the first transition bin (9) and the second accumulation scale (14) are located above the stirring cylinder (19), the dust removing device further comprises a third pulse dust collector (26), a third dust removing main pipe (261) connected with the third pulse dust collector (26), an eighth dust removing branch pipe (262) connected between the third dust removing main pipe (261) and the first transition bin (9), and a ninth dust removing branch pipe (263) connected between the third dust removing main pipe (261) and the second accumulation scale (14), one ends, far away from the third dust removing main pipe (261), of the eighth dust removing branch pipe (262) and the ninth dust removing branch pipe (263) are respectively provided with a fifth manual butterfly valve (264), and the discharge end of the third pulse dust collector (26) is communicated with the top of the stirring cylinder (19).

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