CN115301103B - High-earth dam uneven gravel-earth material mixing system and screening method - Google Patents

High-earth dam uneven gravel-earth material mixing system and screening method Download PDF

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Publication number
CN115301103B
CN115301103B CN202210945177.3A CN202210945177A CN115301103B CN 115301103 B CN115301103 B CN 115301103B CN 202210945177 A CN202210945177 A CN 202210945177A CN 115301103 B CN115301103 B CN 115301103B
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materials
coarse
fine
screen
blending
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CN115301103A (en
Inventor
熊亮
李秋石
薛凯
江万红
车维斌
张振
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Sinohydro Bureau 5 Co Ltd
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Sinohydro Bureau 5 Co Ltd
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/60—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis
    • B01F27/70—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis with paddles, blades or arms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/70—Pre-treatment of the materials to be mixed
    • B01F23/713—Sieving materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/71—Feed mechanisms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/75—Discharge mechanisms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/80—Forming a predetermined ratio of the substances to be mixed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/28—Moving screens not otherwise provided for, e.g. swinging, reciprocating, rocking, tilting or wobbling screens
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/42—Drive mechanisms, regulating or controlling devices, or balancing devices, specially adapted for screens
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B7/00—Barrages or weirs; Layout, construction, methods of, or devices for, making same
    • E02B7/02—Fixed barrages
    • E02B7/04—Dams across valleys
    • E02B7/06—Earth-fill dams; Rock-fill dams

Abstract

The invention discloses a high-earth dam inhomogeneous gravel-soil material mixing system and a screening method, which relate to the technical field of building construction and comprise the following steps: step one: mining earth materials; step two: screening the mined soil materials, screening out coarse materials and fine materials, and classifying and stacking the coarse materials and the fine materials; step three: transporting the coarse and fine materials to a blending site; step four: detecting the water content omega and the P5 content of the coarse material and the fine material, and calculating the blending mass proportion alpha according to the water content omega and the P5 content; step five: stirring and blending the coarse material and the fine material according to the blending mass proportion alpha to obtain a homogeneous stirring material; step six: and transporting the obtained homogeneous stirring material to a finished product stacking bin. By adopting the scheme, the uniformity of the blended soil material is improved by accurately blending the coarse material and the fine material, the stable quality of the produced soil material is ensured, the blending degree of the automatic machine is improved, and the construction efficiency is improved.

Description

High-earth dam uneven gravel-earth material mixing system and screening method
Technical Field
The invention relates to the technical field of building construction, in particular to a high-earth dam inhomogeneous gravel-earth material mixing system and a screening method.
Background
In the construction of a high-gravel soil core wall dam, the quality of core wall anti-seepage soil materials is the key of construction, and natural soil materials have uneven and unstable quality distribution and have the conditions of higher and lower gravel content and the like. At present, a mixing process of 'tiling vertical mining' of soil materials and gravel materials is generally adopted for the non-uniformly distributed core wall soil materials at home and abroad. Although the blending quality and the production strength meet the requirements, the blending process of tiling vertical mining has high production cost, large operation surface requirement and large requirements for constructors and mechanical equipment, and the process test shows that the conventional blending cannot uniformly blend fine materials below 5mm in the soil material, the fine materials are agglomerated, the condition of uniform blending cannot be influenced, and the compaction effect is influenced.
Disclosure of Invention
The invention aims to provide a high-earth dam uneven gravel-soil material mixing system and a screening method.
The invention is realized by the following technical scheme:
a method for blending uneven gravel soil material of a high earth dam, comprising the following steps:
step one: mining earth materials;
Step two: screening the mined soil materials, screening out coarse materials and fine materials, and classifying and stacking the coarse materials and the fine materials;
step three: transporting the coarse and fine materials to a blending site;
step four: detecting the water content omega and the P5 content of the coarse material and the fine material, and calculating the blending mass proportion alpha according to the water content omega and the P5 content;
step five: stirring and blending the coarse material and the fine material according to the blending mass proportion alpha to obtain a homogeneous stirring material;
step six: and transporting the obtained homogeneous stirring material to a finished product stacking bin.
Compared with the prior art, the conventional mixing cannot uniformly mix fine materials with the particle size of less than 5mm, the fine materials are agglomerated and cannot be uniformly mixed, and the compaction effect is affected; specifically, before the earth material is excavated, surface soil, weeds, tree roots, garbage and other sundries in the excavation range are removed, the earth material is transported to various storage yards to be stored, and the earth material is inspected and accepted by a supervision engineer and then subjected to next working procedure construction; then starting to mine the soil, wherein the soil is preferably mined by adopting a front shovel or a back shovel excavator in a layered and vertical mode, and screening is carried out in the prior art, for example, the patent publication number is: CN203878586U, name: the utility model relates to a grid bucket for quickly mixing soil materials; classifying and stacking the screened qualified materials, coarse materials and fine materials with different characteristics; when blending is needed, the coarse material and the fine material are transported to a blending field, the content of water content omega and P5 is detected, the blending mass proportion alpha is calculated according to the content of water content omega and P5, at the moment, the coarse material and the fine material can be stirred and blended according to the blending mass proportion alpha to obtain a homogeneous stirring object, and finally the obtained homogeneous stirring object is transported to a finished material stacking bin to be stacked, and at the moment, the obtained homogeneous stirring object according to the blending mass proportion alpha has uniform blending soil and stable quality.
Further preferably, the first step further comprises the following sub-steps: before the earth material is mined, carrying out particle grading experimental detection on the source material, and primarily judging the P5 index of the earth material in the mining and material taking area; classification of coarse, fine, pass and reject materials for identifying earth materials in a mining area.
Further preferably, the first step further comprises the following sub-steps: the soil exploitation needs to be carried out by adopting a front shovel or a back shovel excavator in a layered and vertical exploitation mode; wherein the front shovel diggers the earth material above the dead surface and the back shovel diggers the earth material below the dead surface, and the layered digging height is determined according to the effective working height of the digging equipment, and is generally 3-4 m. In order to prevent aggregate separation in the loading process, the height of the unloading hopper of the digging and mounting equipment from the container of the dump truck is not too high, and is generally about 3 m.
Further optimizing, the detailed steps of the second step comprise: according to the source, the mined soil materials are screened to be used materials and waste materials, the waste materials are directly transported to a waste material storage yard, the used materials are transported to a screening system, gravel material super-diameter stones in the soil materials are removed, and the removed soil materials are stored in a classified manner according to qualified materials, rough materials and fine materials with different characteristics.
Further optimizing, the calculation formula of the blending mass proportion alpha is as follows:
；
wherein: m, the mass of coarse materials; m' -bias mass; p (P) 5 -a particle content of the partial coarse material of more than 5 mm; p (P) 5 The particle content of the' -partial fine material with the particle size larger than 5 mm; omega-moisture content of coarse material; omega' -moisture content of the fines;-the content of particles with a particle size greater than 5mm in the final product.
Further optimized, a high earth dam heterogeneous gravel-soil material blending system comprises:
a clay bin for stacking finer materials and a gravel bin for stacking coarser materials;
the stirring main machine is used for stirring the partial fine materials and the partial coarse materials;
a feeding and conveying device for conveying the fine material and the coarse material to the stirring host;
and the finished product material conveying device is used for conveying the homogeneous stirring material obtained by the stirring main machine to the finished product material stacking bin.
Compared with the problems of high production cost, large requirement on working surface and large requirement on constructors and mechanical equipment of a blending process of tiling and vertical mining in the prior art, the scheme provides the uneven gravel-soil material blending system of the high-soil dam, and by adopting the scheme, the blending degree of an automatic machine is improved through process control and quality control, and the construction efficiency is improved; specifically, when the finer materials and the coarser materials are transported to a blending field, the finer materials are equivalent to clay, the coarse materials are equivalent to gravel and are placed in a gravel bin, then the finer materials and the coarser materials are placed on a feeding conveying device according to the blending proportion and are conveyed into a stirring host machine to be stirred by the feeding conveying device, so as to obtain a homogeneous stirring object, and then the homogeneous stirring object is conveyed into a finished product stacking bin by a finished product conveying device to be stacked; wherein the feeding conveyor adopts a feeding conveyor belt, and the finished product material conveyor adopts a finished product conveyor belt.
Further optimized, the discharge ports of the clay bin and the gravel bin are respectively provided with a screening device, and the clay bin and the gravel bin are respectively used for conveying the fine-bias materials and the coarse-bias materials to a conveying device through the screening devices, and the conveying device is used for conveying the fine-bias materials and the coarse-bias materials to a feeding conveying device; the screening device comprises a feeding cavity, a distributing cavity and a discharging cavity which are sequentially communicated from top to bottom, a screen is arranged in the feeding cavity, a first rotating shaft is arranged in the middle of the distributing cavity, the first rotating shaft is transversely arranged and uniformly provided with a plurality of blades, and the blades can rotate around the axis of the first rotating shaft; the end part of the blade far away from the first rotating shaft is bent towards the direction of reversing the blade; the offset fine materials screened out by the screen mesh can fall into a storage space between two adjacent blades; the side wall of the material distribution cavity is vertically provided with a sliding groove, a sliding block is connected in the sliding groove in a sliding way, a discharging hole is formed in the middle of the sliding block, a first discharging pipe is arranged on the outer side of the material distribution cavity, and the sliding block slides up and down and is used for sealing or communicating the first discharging pipe; a lug is arranged below the inner side end part of the discharging hole, the upper end and the lower end of the chute are respectively provided with a first electromagnet, and the magnetism of the first electromagnet is changeable;
The first electromagnet is used for attracting or repelling the sliding block, when the first electromagnet repels the sliding block, the lug can enter the rotating area of the blade, and the blade is used for driving the lug to be separated from the rotating area of the blade; when the first electromagnet below the chute attracts the sliding block, the discharging hole is communicated with the first discharging pipe; the blades rotate positively, and fine aggregate between adjacent blades falls onto a fine aggregate collecting plate on the conveying device from the discharging cavity; the blades are reversed, and fine aggregate between adjacent blades falls into the discharge holes; and weighing sensors are arranged on the fine aggregate collecting plate and the screen.
In the scheme, during the actual sieving and removing process to the storage stage, the fine aggregate in the clay bin still contains a small amount of coarse aggregate, and the coarse aggregate in the gravel bin also contains a small amount of fine aggregate, so when the blending mass proportion alpha is set, the blending precision is further improved, the times of reworking treatment of a furnace are reduced, the blending efficiency is improved, the automatic production is improved, the coarse aggregate and the fine aggregate are further required to be sieved, and in order to achieve the purposes, the sieving device is arranged in the clay bin, and because the water contents in the coarse aggregate and the fine aggregate are different, the fine aggregate with the particle size smaller than 5mm and the coarse aggregate with the particle size larger than 5mm which are required by us in the fine aggregate and the coarse aggregate with the particle size smaller than 5mm and the coarse aggregate with the particle size larger than 5mm are required by us in the coarse aggregate are required to be obtained respectively; specifically, the screening device comprises a feeding cavity, a distributing cavity and a discharging cavity which are sequentially communicated from top to bottom, wherein the feeding cavity is used for receiving aggregate conveyed by a bin above, a screen is arranged in the feeding cavity, the screen holes of the screen are 5mm, so that fine aggregate smaller than 5mm falls from the screen and enters the distributing cavity; further, a first rotating shaft is arranged in the material distributing cavity, the first rotating shaft is transversely arranged to enable the blades to horizontally rotate, and aggregates can fall into a storage space between adjacent blades at the moment, wherein the size of an outlet at the lowest part of the material feeding cavity is smaller than the rotating diameter of the blades and is positioned right above the blades, so that the aggregates can only fall into the storage space; along with clockwise positive rotation of the blade, aggregate in the storage space gradually falls into the discharging cavity and falls onto the fine aggregate collecting plate on the conveying device from the discharging cavity, when a weighing sensor on the fine aggregate collecting plate reaches a set threshold value, the blade is stopped from rotating positively at the moment, and coarse aggregate is still continuously screened out from the screen, so that the fine aggregate collecting plate is not blanked any more, and the blade is required to be controlled to rotate reversely; the side wall of the material distribution cavity is provided with a chute and a sliding block, so that the sliding block can vertically slide, the side wall of the material distribution cavity is also provided with a first discharging pipe, the first discharging pipe is just positioned in the middle position in the chute, the middle position of the sliding block is also provided with a discharging hole, and at the moment, the sliding block can seal the first discharging pipe or enable the first discharging pipe to be communicated with the discharging hole in the vertical sliding process; wherein, the lower end of the inner side of the discharging hole is provided with a lug which extends to the inside of the distributing cavity; the upper end and the lower end of the chute are respectively provided with a first electromagnet which can attract or repel the sliding block, when the sliding block is at the initial position, the sliding block is adsorbed on the first electromagnet at the upper end of the chute, at the moment, the sliding block seals the first discharging hole, when the blades are reversed, the first electromagnet generates repulsive force to repel the sliding block downwards, the sliding block slides downwards, and the convex block enters the rotating area of the blades, because the blades are reversed, the end part of the blades can strike the convex block downwards and drive the convex block to slide downwards until the convex block is separated from the rotating area of the blades, and at the moment, the first electromagnet at the lower end of the sliding block is close to the sliding block in distance and generates attractive force, so that the sliding block is adsorbed, and at the moment, the discharging hole is just communicated with the first discharging pipe; the outer ends of the blades are bent towards the reverse direction of the blades, so that the blades can rotate reversely with aggregate in the storage space, the aggregate in the storage space can fall downwards when rotating to the side close to the sliding block due to a certain length of the protruding block, and the aggregate can fall into the discharge hole due to the blocking of the protruding block, so that the aggregate enters the first discharge pipe; wherein the outer layer of the bump is wrapped with a rubber pad, so that the damage is avoided; when the weight of the screen mesh reaches a set threshold, the blade is stopped from rotating reversely, the blade is made to rotate positively, the first electromagnet at the lower end of the chute generates repulsive force, the sliding block is made to move upwards, the protruding block enters the rotating area of the blade, the blade can hit the sliding block upwards, the sliding block is made to move upwards and separate from the rotating area, the sliding block is fixed through the first electromagnet at the upper end of the chute, and the sliding block seals the first discharging pipe.
Further preferably, the blades are reversed, and when any blade leaves the convex blocks, the back side surface of the blade is gradually bent downwards; wherein, the interval between adjacent blades has certain limit, and the interval between the lug and the blade rotating area is millimeter interval; when the end part of one blade is positioned above the end part of the lug and leaves the lug, the cambered surface on the back side of the blade is downwards bent, so that aggregates in the storage space can fall into the discharge hole;
further optimizing, wherein both ends of the back side of any blade are provided with stop bars; for preventing aggregate in the storage space from falling out from both sides of the blade.
Further preferably, nylon cloth is arranged between every two adjacent blades, two ends of the nylon cloth are respectively connected with the middle parts of the side surfaces of the two blades, the middle parts of the nylon cloth are provided with mass balls, the mass balls are arranged near the inner side surfaces of the blades which are bent inwards, and the mass balls are used for driving the nylon cloth to be recessed inwards or protruded outwards in the storage space; for allowing aggregate in the storage space to fall smoothly.
Further optimized, one end of the first discharging pipe far away from the material distributing cavity is connected with a storage box, the storage box is communicated with the discharging cavity through a second discharging pipe, and the second discharging pipe is provided with a first electromagnetic valve; for collecting and storing the fine aggregate obtained by screening.
Further preferably, the feeding cavity is in a cylindrical shape which is transversely arranged, a second rotating shaft which is coaxially arranged with the feeding cavity is arranged in the feeding cavity, and the second rotating shaft is connected with the screen and is used for driving the screen to rotate around the axis of the screen; the two ends of the screen are respectively connected with the inner side surface of the feeding cavity in a sliding manner; a third discharging pipe is arranged on one side of the feeding cavity and used for conveying coarse aggregate to a coarse aggregate collecting plate on the conveying device; the baffle plates are arranged on the other side of the feeding cavity, the upper part and the lower part of the screen are respectively provided with a baffle plate, the baffle plates above the screen are second electromagnets, and the second electromagnets are used for adsorbing the screen; when the second electromagnetic adsorption is carried out on one end of the screen, the third discharging pipe is positioned above the other end of the screen; the third discharging pipe is provided with a second electromagnetic valve; is used for optimizing the screen and screening out the coarse aggregate needed by us.
Further optimized, a screening method comprises the following steps:
s1: opening the discharge ports of the clay bin and the gravel bin, and continuously feeding the materials into the feeding cavity;
s2: controlling the first rotating shaft to rotate positively and reversely, and controlling the second rotating shaft to rotate positively and reversely, so that coarse aggregate is left on the screen, and fine aggregate falls into the storage space of two adjacent blades from the screen;
S3: when the weight weighed by the weighing sensor on the fine aggregate collecting plate reaches a set threshold value, controlling the first rotating shaft to rotate reversely, controlling the first electromagnet at the upper end of the chute to generate repulsive force, and controlling the first electromagnet at the lower end of the chute to generate attractive force;
s4: at the moment, a weighing sensor on the screen (701) starts to work, judges whether the maximum weight reaches a set threshold value within a certain time, continuously feeds the screen if the maximum weight does not reach the set threshold value, and stops feeding if the maximum weight reaches or exceeds the set threshold value;
s5: after stopping feeding, controlling the second electromagnet to adsorb the screen, stopping the rotation of the second rotating shaft, opening the second electromagnetic valve, and inputting coarse aggregate to the coarse aggregate collecting plate.
Compared with the prior art, the invention has the following advantages and beneficial effects:
1. according to the high-earth dam uneven gravel-soil material mixing system and the screening method, by adopting the scheme, the uniformity of the mixed soil material is improved through accurate mixing of coarse materials and fine materials, the stable quality of the produced soil material is ensured through process control and quality control, the mixing degree of an automatic machine is improved, and the construction efficiency is improved.
2. According to the high-earth dam uneven gravel-soil material mixing system and the screening method, by adopting the scheme, continuous production of uneven gravel-soil material mixing production can be realized, and the construction efficiency of the soil material mixing production is improved; energy saving, consumption reduction and effective reduction of construction cost.
3. According to the high-earth dam uneven gravel-soil material mixing system and the screening method, mechanical mixing is adopted to replace a conventional tiling vertical mixing process, so that the automation control degree of mixing is improved, and standardized and refined operation is realized.
4. According to the mixing system and the screening method for the uneven gravel and soil materials of the high-earth dam, the mixing precision of the uneven gravel and soil materials, particularly the mixing uniformity degree of fine material parts in the soil materials, is improved by adopting the scheme, and the quality requirements of high standards of the high-earth dam are met.
5. The invention relates to a high-earth dam uneven gravel-soil material blending system and a screening method.
6. According to the high-earth dam uneven gravel-soil material mixing system and the screening method, by adopting the scheme, the mixing precision can be further improved by utilizing the screening device, the number of times of reworking treatment of a furnace is reduced, so that the mixing efficiency is improved, the automatic production is improved, and coarse aggregate and fine aggregate are further required to be screened.
Drawings
In order to more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, the drawings that are needed in the examples will be briefly described below, it being understood that the following drawings only illustrate some examples of the present invention and therefore should not be considered as limiting the scope, and that other related drawings may be obtained from these drawings without inventive effort for a person skilled in the art. In the drawings:
FIG. 1 is a step diagram of a method of blending non-uniform gravel soil material for a high earth dam;
FIG. 2 is a process flow diagram of a method of blending non-uniform gravel soil material for a high earth dam;
FIG. 3 is a process flow diagram of a method of blending non-uniform gravel soil material for a high earth dam;
FIG. 4 is a block diagram of a high earth dam heterogeneous gravel-soil blending system;
FIG. 5 is a partial schematic view of a high earth dam heterogeneous gravel-soil blending system;
FIG. 6 is a schematic view of the screen apparatus with the slider closed;
FIG. 7 is a partial schematic view A of a screening device with the slider closed;
FIG. 8 is a schematic view of the structure of the screening device with the slide open;
FIG. 9 is a partial schematic view B of a screening device with a slider open;
FIG. 10 is a partial schematic view of a leaf of a screening device;
fig. 11 is a front view of a blade of a screening device.
In the drawings, the reference numerals and corresponding part names:
1-clay bin, 2-gravel bin, 3-stirring host, 4-feeding conveying device, 5-finished product conveying device, 6-finished product stacking bin, 7-feeding cavity, 701-screen, 702-second rotating shaft, 703-third discharging pipe, 704-stop, 705-second electromagnetic valve, 8-distributing cavity, 801-first rotating shaft, 802-blade, 803-chute, 804-slide block, 805-discharging hole, 806-first discharging pipe, 807-bump, 808-first electromagnetic valve, 809-nylon cloth, 810-quality ball, 811-stop bar, 9-discharging cavity, 10-conveying device, 1001-fine aggregate collecting plate, 1002-coarse aggregate collecting plate, 11-storage box, 12-second discharging pipe and 13-first electromagnetic valve.
Detailed Description
For the purpose of making apparent the objects, technical solutions and advantages of the present utility model, the present utility model will be further described in detail with reference to the following examples and the accompanying drawings, wherein the exemplary embodiments of the present utility model and the descriptions thereof are for illustrating the present utility model only and are not to be construed as limiting the present utility model.
Example 1
The present embodiment 1 provides a method for mixing heterogeneous gravel soil material of a high earth dam, as shown in fig. 1 to 4, comprising the steps of:
a method for blending uneven gravel soil material of a high earth dam, comprising the following steps:
step one: mining earth materials;
step two: screening the mined soil materials, screening out coarse materials and fine materials, and classifying and stacking the coarse materials and the fine materials;
step three: transporting the coarse and fine materials to a blending site;
step four: detecting the water content omega and the P5 content of the coarse material and the fine material, and calculating the blending mass proportion alpha according to the water content omega and the P5 content;
step five: stirring and blending the coarse material and the fine material according to the blending mass proportion alpha to obtain a homogeneous stirring material;
step six: and transporting the obtained homogeneous stirring material to a finished product stacking bin.
Compared with the prior art, the conventional mixing cannot uniformly mix fine materials with the particle size of less than 5mm, the fine materials are agglomerated and cannot be uniformly mixed, and the compaction effect is affected; specifically, before the earth material is excavated, surface soil, weeds, tree roots, garbage and other sundries in the excavation range are removed, the earth material is transported to various storage yards to be stored, and the earth material is inspected and accepted by a supervision engineer and then subjected to next working procedure construction; then starting to mine the soil, wherein the soil is preferably mined by adopting a front shovel or a back shovel excavator in a layered and vertical mode, and screening is carried out in the prior art, for example, the patent publication number is: CN203878586U, name: the utility model relates to a grid bucket for quickly mixing soil materials; classifying and stacking the screened qualified materials, coarse materials and fine materials with different characteristics; when blending is needed, the coarse material and the fine material are transported to a blending field, the content of water content omega and P5 is detected, the blending mass proportion alpha is calculated according to the content of water content omega and P5, at the moment, the coarse material and the fine material can be stirred and blended according to the blending mass proportion alpha to obtain a homogeneous stirring object, and finally the obtained homogeneous stirring object is transported to a finished material stacking bin to be stacked, and at the moment, the obtained homogeneous stirring object according to the blending mass proportion alpha has uniform blending soil and stable quality.
As a more detailed implementation procedure:
1. stripping surface soil; before the earth material is excavated, surface soil, weeds, tree roots, garbage and other sundries in the excavation range are removed, the earth material is transported to each storage yard to be stored, and the earth material is inspected and accepted by a supervision engineer and then subjected to next working procedure construction.
2. Excavating soil materials; before the earth material is mined, a test detector performs particle grading test detection on the source material, and preliminarily judges the P5 index of the earth material in the mining and taking area so as to identify the classification of coarse materials, fine materials, qualified materials and waste materials of the earth material in the mining area.
The soil material excavation is carried out by adopting a front shovel or a back shovel excavator in a layered vertical mining mode (the soil material above the excavation stop surface of the front shovel excavator and the soil material below the excavation stop surface of the back shovel), and the layered excavation height is determined according to the effective working height of the excavating equipment and is generally 3-4 m. In order to prevent aggregate separation in the loading process, the height of the unloading hopper of the digging and mounting equipment from the container of the dump truck is not too high, and is generally about 3 m.
3. Sieving treatment; different exploitation treatment modes are adopted according to the materials and the waste materials judged by the source, the waste materials are directly transported to a waste material storage yard, the materials are transported to a screening system to remove gravel and stone super-diameter stones in the soil materials, and the removed soil materials are stored in a classified mode according to the materials with different characteristics.
4. Mechanical blending: (1) calculating the blending proportion; in order to achieve the purpose of mixing the blending raw materials, the qualified materials, the coarse materials and the fine materials with different characteristics are respectively classified and stacked, and meanwhile, test detection personnel detect the moisture content omega and the P5 content of the soil materials in a storage yard. Meanwhile, the blending mass proportion alpha of the coarse material and the fine material is calculated according to the P5 index and the water content omega of the coarse material and the fine material, wherein the content of particles with the particle size of more than 5mm in the finished product material is determined according to engineering design requirement indexes and test results. The calculation formula is as follows:
wherein: m, the mass of coarse materials; m' -bias mass; p (P) 5 -a particle content of the partial coarse material of more than 5 mm; p (P) 5 The particle content of the' -partial fine material with the particle size larger than 5 mm; omega-moisture content of coarse material; omega'-the moisture content of the fines;-the content of particles with a particle size greater than 5mm in the final product.
(2) Blending the coarse and fine materials mechanically;
1) Respectively transporting the coarse material and the fine material into a proportioning bin of the coarse material and the fine material by a loader;
2) Inputting the blending mass ratio alpha of the coarse materials and the fine materials into a mechanical control system for preparing the uneven gravel soil mechanical blending of the high earth-rock dam;
3) Starting a high earth-rock dam uneven gravel soil mechanical blending preparation machine;
4) The coarse material and fine material conveyer belt positioned below the proportioning bin conveys the coarse material and the fine material into the stirring host machine 3;
5) The coarse material and the fine material are forcedly stirred in a continuous stirrer, two earth materials are mixed by the rotation action of double horizontal shafts, so that the mixture flows in opposite directions on the vertical surface and flows in vortex on the horizontal surface, and the mixture is mixed for a short time to obtain a homogeneous stirring material;
6) After being mixed for a short time, the mixture is transmitted to a finished product material transmission belt conveyor under a stirring outlet of a continuous stirrer;
7) The finished product mixture is transported to a finished product material storage bin by a finished product material transporting belt conveyor;
5. detecting a finished product material; and the testers test and detect the materials in the finished material storage bin, and the water content and P5 index of the blended finished material are determined. Carrying out furnace return reworking treatment on unqualified gravel soil materials, and timely correcting the blending mass proportion alpha of coarse materials and fine materials;
the raw material of the mixture for filling construction is core wall soil meeting the requirements of engineering design indexes, and the design indexes of the raw material can be slightly adjusted according to the design indexes of various engineering. The material standards meeting the requirements of the mechanical stirring and blending process summarized by engineering practice are as follows: the maximum grain size of the soil material raw material is preferably not more than 150mm; in order to ensure the uniform mixing effect and the normal discharging of the bin to be continuous and stable, the water content of the soil is not more than 18%.
Example 2
This example 2 provides a high earth dam heterogeneous gravel-soil material blending system, further optimized on the basis of example 1, as shown in fig. 4, comprising:
a clay bin 1 for stacking finer materials and a gravel bin 2 for stacking coarser materials;
a stirring main machine 3 for stirring the finer material and the coarser material;
a feeding and conveying device 4 for conveying the fine material and the coarse material to the stirring host 3;
and the finished product conveying device 5 is used for conveying the homogeneous stirring materials obtained by the stirring main machine 3 to the finished product stacking bin 6.
When the finer materials and the coarser materials are transported to a blending field, the finer materials are equivalent to clay, the clay materials are placed in a clay storage bin 1, the coarser materials are equivalent to gravel, the gravel storage bin 2 is placed, then the finer materials and the coarser materials are placed on a feeding conveying device 4 according to a blending proportion, and are conveyed to a stirring host 3 to be stirred by the feeding conveying device 4, so that homogeneous stirring materials are obtained, and then the finished product conveying device 5 conveys the homogeneous stirring materials to a finished product stacking bin 6 to be stacked; wherein the feeding conveyor 4 adopts a feeding conveyor belt, and the finished product conveyor belt is adopted as the finished product conveyor 5.
The mechanical blending preparation process of the coarse and fine materials is as follows;
1) Respectively transporting the coarse material and the fine material into proportioning bins of the coarse material and the fine material, namely a clay bin 1 and a gravel bin 2 by a loader;
2) Inputting the blending mass ratio alpha of the coarse materials and the fine materials into a mechanical control system for preparing the uneven gravel soil mechanical blending of the high earth-rock dam;
3) Starting a high earth-rock dam uneven gravel soil mechanical blending preparation machine;
4) The coarse material and fine material conveyer belt positioned below the proportioning bin conveys the coarse material and the fine material into the stirring host machine 3;
5) The coarse material and the fine material are forcedly stirred in a continuous stirrer, two earth materials are mixed by the rotation action of double horizontal shafts, so that the mixture flows in opposite directions on the vertical surface and flows in vortex on the horizontal surface, and the mixture is mixed for a short time to obtain a homogeneous stirring material;
6) After being mixed for a short time, the mixture is transmitted to a finished product material transmission belt conveyor under a stirring outlet of a continuous stirrer;
7) The finished product mixture is transported to a finished product material storage bin by a finished product material transporting belt conveyor;
the principle is mainly as follows: the stable soil mixing equipment used for production at present is used as mechanical stirring equipment to finish the mechanical stirring and mixing of natural uneven soil materials in the earth-rock dam engineering. The stabilized soil mixing equipment adopts WCB series stabilized soil plant mixing equipment. The stirring main machine 3 adopts a forced stirring mode of a lining-plate-free double horizontal shaft, and the stirring action is realized by the rotation action of the double horizontal shaft, the opposite flow of the mixture on the vertical surface and the vortex flow on the horizontal surface, so that the homogeneous stirring material can be obtained in a short time. The mixing proportion of the uneven gravel soil material is controlled by a computer in a control room to be arranged at the outlet of the storage bin to measure a belt motor frequency converter and the like, so that the weight of the material and the mixing proportion are accurately controlled. During construction, the uneven gravel and soil materials are respectively discharged from the storage bin, the mixing proportion of the partial coarse materials/gravel materials and the partial fine materials/clay materials is controlled by the control room, and the materials are conveyed into the stirring host machine 3 through the feeding belt to be directly output to the qualified materials after being uniformly mixed.
Example 3
This embodiment 3 is further optimized on the basis of embodiment 2, providing a screening device as shown in fig. 5 to 11;
the discharge holes of the clay bin 1 and the gravel bin 2 are respectively provided with a screening device, the clay bin 1 and the gravel bin 2 are respectively used for conveying fine materials and coarse materials to the conveying device 10 through the screening devices, and the conveying device 10 is used for conveying the fine materials and the coarse materials to the feeding conveying device 4; the screening device comprises a feeding cavity 7, a distributing cavity 8 and a discharging cavity 9 which are sequentially communicated from top to bottom, wherein a screen 701 is arranged in the feeding cavity 7, a first rotating shaft 801 is arranged in the middle of the distributing cavity 8, the first rotating shaft 801 is transversely arranged and uniformly provided with a plurality of blades 802, and the blades 802 can rotate around the axis of the first rotating shaft 801; the end of the blade 802 away from the first rotation shaft 801 is curved in a direction in which the blade 802 is reversed; the finer material screened out by the screen 701 can fall into the storage space between two adjacent blades 802; a sliding groove 803 is vertically formed in the side wall of the material distribution cavity 8, a sliding block 804 is connected in a sliding manner in the sliding groove 803, a discharging hole 805 is formed in the middle of the sliding block 804, a first discharging pipe 806 is arranged on the outer side of the material distribution cavity 8, and the sliding block 804 slides up and down and is used for sealing or communicating the first discharging pipe 806; a bump 807 is arranged below the inner side end of the discharging hole 805, a first electromagnet 808 is arranged at the upper end and the lower end of the chute 803, and the magnetism of the first electromagnet 808 is changeable;
A first electromagnet 808 is configured to attract or repel the slider 804, wherein when the first electromagnet 808 repels the slider 804, the protrusion 807 can enter a rotation region of the blade 802, and the blade 802 is configured to drive the protrusion 807 out of the rotation region of the blade 802; when the first electromagnet 808 below the chute 803 attracts the slide block 804, the discharging hole 805 is communicated with the first discharging pipe 806; the blades 802 rotate forward, and fine aggregate between adjacent blades 802 falls from the discharging cavity 9 onto a fine aggregate collecting plate 1001 on the conveying device 10; the blades 802 are reversed, and fine aggregate between adjacent blades 802 falls into the discharge hole 805; and weighing sensors are arranged on the fine aggregate collecting plate 1001 and the screen 701.
In the embodiment, the clay bin 1 and the gravel bin 2 still contain a small amount of coarse aggregates in the clay bin 1 from the actual sieving and rejecting process to the storage stage, and the coarse aggregates in the gravel bin 2 also contain a small amount of fine aggregates, so when the blending mass proportion alpha is set, the blending precision is further improved, the number of times of furnace return reworking treatment is reduced, the blending efficiency is further improved, the automatic production is improved, the coarse aggregates and the fine aggregates are further required to be sieved, and in order to achieve the purposes, the sieving device is arranged in the clay bin 1, and the fine aggregates with the particle size smaller than 5mm and the coarse aggregates with the particle size larger than 5mm which are required to be needed in the fine aggregates and the coarse aggregates with the particle size smaller than 5mm and the coarse aggregates with the particle size larger than 5mm which are required to be needed in the coarse aggregates are respectively required to be obtained due to the fact that the water contents in the coarse aggregates and the fine aggregates are different; specifically, the screening device comprises a feeding cavity 7, a distributing cavity 8 and a discharging cavity 9 which are sequentially communicated from top to bottom, wherein the feeding cavity 7 is used for receiving aggregate conveyed by a bin above, a screen 701 is arranged in the feeding cavity 7, wherein the screen holes of the screen 701 are 5mm, and fine aggregate smaller than 5mm falls from the screen 701 and enters the distributing cavity 8; further, a first rotating shaft 801 is arranged in the material distributing cavity 8, the first rotating shaft 801 is transversely arranged to enable the blades 802 to horizontally rotate, and at the moment, aggregate can fall into a storage space between the adjacent blades 802, wherein the size of an outlet at the lowest part of the material feeding cavity 7 is required to be smaller than the rotating diameter of the blades 802 and is positioned right above the blades 802, so that the aggregate can only fall into the storage space; along with the clockwise positive rotation of the blade 802, the aggregate in the storage space gradually falls down into the discharging cavity 9 and falls onto the fine aggregate collecting plate 1001 on the conveying device 10 from the discharging cavity 9, when the weighing sensor on the fine aggregate collecting plate 1001 reaches the set threshold value, the positive rotation of the blade 802 is stopped, and the coarse aggregate is still continuously screened out at the screen 701, so that the blade 802 is required to be controlled to rotate reversely in order to prevent the fine aggregate collecting plate 1001 from blanking any more; the side wall of the material distribution cavity 8 is provided with a chute 803 and a slide block 804, so that the slide block 804 can vertically slide, the side wall of the material distribution cavity 8 is also provided with a first discharging pipe 806, wherein the first discharging pipe 806 is just positioned in the middle position in the chute 803, and a discharging hole 805 is also arranged in the middle position of the slide block 804, and at the moment, in the process of sliding the slide block 804 up and down, the slide block 804 can seal the first discharging pipe 806 or enable the first discharging pipe 806 to be communicated with the discharging hole 805; wherein, a convex block 807 is arranged at the lower end position of the inner side of the discharging hole 805, and the convex block 807 extends to the inside of the material distributing cavity 8; the upper end and the lower end of the chute 803 are respectively provided with a first electromagnet 808 which can attract or repel the sliding block 804, when in an initial position, the sliding block 804 is adsorbed on the first electromagnet 808 at the upper end of the chute 803, at the moment, the sliding block 804 seals the first discharging hole 805, when the blade 802 is reversed, the first electromagnet 808 generates repulsive force to repel the sliding block 804 downwards, the sliding block 804 slides downwards, the convex block 807 enters the rotating area of the blade 802, and because the blade 802 is reversed, the end part of the blade 802 can strike the convex block 807 downwards and drive the convex block 807 to slide downwards until the sliding block 807 is separated from the rotating area of the blade 802, and at the moment, the first electromagnet 808 at the lower end of the sliding block 804 is close to the sliding block 804 in distance and generates attractive force, so that the sliding block 804 is adsorbed, and at the moment, the discharging hole 805 is just communicated with the first discharging pipe 806; because the outer ends of the blades 802 are bent in the reverse direction of the blades 802, the blades 802 can rotate reversely with the aggregate in the storage space, the aggregate in the storage space can fall downwards when rotating to the side close to the sliding block 804 due to a certain length of the protruding block 807, and can fall into the discharging hole 805 due to the blocking of the protruding block 807, so that the aggregate enters the first discharging pipe 806; wherein the outer layer of the convex block 807 is wrapped with a rubber pad to avoid damage; when the weight of the screen 701 reaches a set threshold, the blade 802 is stopped to rotate reversely, the blade 802 rotates forwardly, the first electromagnet 808 at the lower end of the chute 803 generates repulsive force, so that the slide 804 moves upwards, the convex block 807 enters the rotating area of the blade 802, the blade 802 can strike the slide 804 upwards, the slide 804 moves upwards and is separated from the rotating area, and the slide 804 is fixed by being adsorbed by the first electromagnet 808 at the upper end of the chute 803, and the slide 804 seals the first discharging pipe 806.
In this embodiment, the blades 802 are reversed, and when any one of the blades 802 leaves the bump 807, the back side of the blade 802 is gradually curved downward; wherein there is a limit to the spacing between adjacent blades 802, and the spacing between the bump 807 and the region of rotation of the blades 802 is millimeter spacing; when the end of one of the blades 802 is located above the end of the bump 807 and is to be separated from the bump 807, as shown in fig. 7, the cambered surfaces on the back sides of the blades 802 are all curved downward, so that the aggregate in the storage space can be conveniently all fallen into the discharging hole 805;
in this embodiment, two ends of the back side of any blade 802 are provided with a stop bar 811; for preventing aggregate in the storage space from falling out of both sides of the blade 802 as shown in fig. 10.
In this embodiment, nylon cloths 809 are disposed between two adjacent blades 802, two ends of each nylon cloth 809 are respectively connected with the middle parts of the side surfaces of two blades 802, the middle parts of each nylon cloth 809 are provided with a mass ball 810, the mass balls 810 are disposed near the inner side surfaces of the blades 802 which are bent inwards, and the mass balls 810 are used for driving the nylon cloths 809 to be recessed inwards or protruded outwards in the storage space; in order to make the aggregate in the storage space fall smoothly, in the scheme, nylon cloth 809 is arranged between two adjacent blades 802, wherein one end of the nylon cloth 809 is connected with the middle position of the back side of one blade 802, and the other end is connected with the middle position of the inner side of the other blade 802; the nylon cloth 809 is also provided with a quality ball 810, at this time, when the opening of the storage space is upward, the quality ball 810 drives the middle part of the nylon cloth 809 to be concave inwards, and the aggregate falls onto the nylon cloth 809, and when the opening of the storage space is gradually downward, the quality ball 810 can drive the middle part of the nylon cloth 809 to be convex outwards, and the aggregate in the nylon cloth 809 is discharged; the mass ball 810 is disposed on the inner side surface near the other blade 802, and at this time, when the blade 802 is reversed, the nylon cloth 809 can be quickly driven to turn out in advance, so as to facilitate the discharge of aggregate.
In this embodiment, one end of the first discharging pipe 806, which is far away from the material distributing cavity 8, is connected to the storage box 11, the storage box 11 is communicated with the discharging cavity 9 through a second discharging pipe 12, and the second discharging pipe 12 is provided with a first electromagnetic valve 13; in order to collect and store the fine aggregate obtained by screening, in the scheme, the other end of the first discharging pipe 806 is connected with a storage box 11, the storage box 11 is convenient for storing the fine aggregate discharged by the first discharging pipe 806, the storage box 11 is also connected with the discharging cavity 9 through a second discharging pipe 12, and a first electromagnetic valve 13 is arranged, and the fine aggregate can be supplemented into the discharging cavity 9 by opening the first electromagnetic valve 13.
In this embodiment, the feeding chamber 7 is in a cylindrical shape that is transversely disposed, a second rotating shaft 702 that is coaxially disposed with the feeding chamber 7 is disposed in the feeding chamber 7, and the second rotating shaft 702 is connected to the screen 701 and is used to drive the screen 701 to rotate around its own axis; both ends of the screen 701 are respectively connected with the inner side surface of the feeding cavity 7 in a sliding manner; a third discharging pipe 703 is arranged on one side of the feeding cavity 7, and the third discharging pipe 703 is used for conveying coarse aggregate to a coarse aggregate collecting plate 1002 on the conveying device 10; the upper and lower sides of the screen 701 are respectively provided with a stop block 704 at the other side of the feeding cavity 7, and the stop blocks 704 above the screen 701 are second electromagnets for adsorbing the screen 701; when the second electromagnetic adsorption is performed on one end of the screen 701, the third discharging pipe 703 is located above the other end of the screen 701; the third discharging pipe 703 is provided with a second electromagnetic valve 705; in order to optimize the screen 701 and screen out the coarse aggregate needed by us, in the scheme, the feeding cavity 7 is in a cylinder shape which is transversely arranged, a second rotating shaft 702 is arranged at the axial position of the feeding cavity 7, the second rotating shaft 702 is connected with the screening and can drive the screen 701 to rotate, wherein the end parts of the two ends of the screen 701 are both in sliding connection with the inner side of the feeding cavity 7, the upper side and the lower side of the other end of the screen 701 are both provided with stop blocks 704, and at the moment, the second rotating shaft 702 rotates positively and negatively alternately, and the screen 701 rotates positively and negatively under the blocking of the stop blocks 704, so that the screening purpose is achieved; and at the other end of the screen 701, the side wall of the feeding cavity 7 is further provided with a third discharging pipe 703, and a stop block 704 positioned above one end of the screen 701 is a second electromagnet, when coarse aggregate on the screen 701 needs to be discharged, the second electromagnet can adsorb the screen 701, the screen 701 is inclined, the pipe orifice of the third discharging pipe 703 is just positioned above one end of the screen 701, and at the moment, a second electromagnetic valve 705 on the third discharging pipe 703 is opened, so that coarse aggregate can be discharged, and the coarse aggregate falls onto a coarse aggregate collecting plate 1002 on the conveying device 10.
In this embodiment, there is also provided a sieving method including the steps of:
s1: opening the discharge ports of the clay bin 1 and the gravel bin 2, and continuously feeding the materials into the feeding cavity 7;
s2: controlling the first rotating shaft 801 to rotate positively and controlling the second rotating shaft 702 to rotate positively and negatively, so that coarse aggregate is left on the screen 701, and fine aggregate falls into the storage space of two adjacent blades 802 from the screen 701;
s3: when the weight weighed by the weighing sensor on the fine aggregate collecting plate 1001 reaches a set threshold value, the first rotating shaft 801 is controlled to rotate reversely, the first electromagnet 808 at the upper end of the chute 803 is controlled to generate repulsive force, and the first electromagnet 808 at the lower end of the chute 803 is controlled to generate attractive force;
s4: at this time, a weighing sensor on the screen 701 (701) starts to work, and judges whether the maximum weight reaches a set threshold value within a certain time, if the maximum weight does not reach the set threshold value, feeding to the screen 701 is continued, and if the maximum weight reaches or exceeds the set threshold value, feeding is stopped;
s5: after stopping feeding, at this time, the second electromagnet adsorption screen 701 is controlled, the rotation of the second rotating shaft 702 is stopped, the second electromagnetic valve 705 is opened, and coarse aggregate is fed to the coarse aggregate collecting plate 1002.
In this embodiment, during actual operation, the specific working steps are as follows: firstly, opening discharge holes of a clay bin 1 and a gravel bin 2, continuously feeding the materials into a feeding cavity 7, controlling a second rotating shaft 702 to rotate positively and reversely, enabling a screen 701 to screen fine aggregates and coarse aggregates, controlling a first rotating shaft 801 to rotate positively, enabling the fine aggregates to fall into a storage space between two blades 802, falling into a discharge cavity 9 from the storage space and finally falling onto a fine aggregate collecting plate 1001, when a weighing sensor on the fine aggregate collecting plate 1001 reaches a set threshold value, controlling the first rotating shaft 801 to rotate reversely, controlling a first electromagnet 808 at the upper end of a chute 803 to generate repulsive force, and enabling a first electromagnet 808 at the lower end to generate attractive force, enabling the screened fine aggregates to enter a storage box 11, and simultaneously, enabling a controller to start controlling the weighing sensor on the screen 701 to work, and judging whether the maximum weight of the weighing sensor reaches the set threshold value or not, wherein the screen 701 can incline up and down, and when the screen 701 is in a level, the weighing sensor is only called accurate value, but also called the maximum value; therefore, if the maximum value does not reach the set threshold value, feeding to the screen 701 is continued, and when the maximum value reaches or exceeds the set threshold value for a certain time, feeding is stopped, the electromagnet is controlled to adsorb the screen 701, rotation of the second rotating shaft 702 is stopped, and then the electromagnetic valve is opened, so that coarse aggregate is conveyed to the coarse aggregate collecting plate 1002; further, a weighing sensor is also provided on the coarse aggregate collecting plate 1002, and when the weighing sensor on the coarse aggregate collecting plate 1002 reaches a set threshold value, the second electromagnetic valve 705 is closed, so that a small amount of coarse aggregate remains on the screen 701 to wait for the next operation.
Example 4
This example 4 provides a specific embodiment, which is applied to dam engineering of a hydropower station.
The long-dam hydropower station is a 10-level power station developed in a large-river dry-flow hydropower cascade mode, is arranged on a river reach about 4 km-7 km below an upstream gold-water river mouth of a large-river at an engineering area, is arranged on a dam site at a distance of 82km from Denba county, is arranged at a distance of 49km from Lu fixed county, and is arranged at a distance of about 360km.
The normal water storage level of the reservoir is 1690m, and the reservoir capacity below the normal water storage level is 10.15 hundred million m 3 The total storage capacity is 10.75 hundred million m 3 . Adjusting the storage capacity to be 4.15 hundred million m 3 The total installed capacity of the power station is 2600MW.
The barrage is a gravel soil vertical core wall rock-fill dam, the maximum dam height is 240m, the dam top elevation is 1697.00m, the maximum dam height is 240m, the dam top length is 502.85m, and the upstream and downstream dam slopes are 1:2, the dam crest width is 16m. The core wall top elevation 1696.40m and the top width 6m, and the gradient of the core wall and the downstream is 1:0.25, bottom elevation 1457.00m, bottom width 125.70m.
The seepage-proofing material of the core wall of the gravel soil of the dam is 428.32 ten thousand m 3 High-plasticity soil 22.1 ten thousand m 3 The total amount of the soil materials is 450.42 ten thousand m 3 . The filter material 1 is about 48.52 ten thousand m 3 The filter material 2 is about 45.47 ten thousand m 3 The filter material 3 is about 63.36 ten thousand m 3 The filter material 4 is about 8.88 km 3 The total amount of the filtering material is about 166.23 ten thousand m 3 . The upstream transition material is about 124.88 km 3 The downstream transition material is about 119.29 km 3 The total amount of the transition materials is about 244.17 ten thousand m 3 . The upstream rock-fill is about 1101.22 ten thousand m 3 The downstream rockfill is about 1215.72 km 3 The total amount of the rock-fill material is 2316.94 ten thousand m 3 . The total amount of the dam shell material is about 2727 ten thousand m 3 The total filling amount of the earth and the stone of the dam body is 3417.75 ten thousand m 3 (including the weight body and the slope protection).
The engineering time is 11/1/2010 and the contract time is 30/4/2018. The WCB600 type uneven gravel soil mixing mechanical equipment developed by water and electricity five bureau company for filling the long-river dam hydropower station dam engineering is used for the construction of uneven gravel soil mixing in the engineering filling process, can ensure that uneven gravel soil is mixed uniformly and fed continuously, effectively ensures the core wall filling quality and the construction progress, has mature and stable construction method for preparing uneven gravel soil by mechanical mixing of a high-earth dam, has high mechanical construction efficiency for preparing uneven gravel soil by mechanical mixing, and has quick and stable quality of the mixed finished soil. The application of the mechanical blending preparation construction method for the high-soil-stone heterogeneous gravel soil material plays a key role in guaranteeing the blending quality and strength of the gravel soil, saving energy, reducing emission and the like.
The foregoing description of the embodiments has been provided for the purpose of illustrating the general principles of the invention, and is not meant to limit the scope of the invention, but to limit the invention to the particular embodiments, and any modifications, equivalents, improvements, etc. that fall within the spirit and principles of the invention are intended to be included within the scope of the invention.

Claims (5)

1. A high earth dam heterogeneous gravel-soil material blending system, comprising:
a clay bin (1) for stacking the partial fine materials and a gravel bin (2) for stacking the partial coarse materials;
a stirring main machine (3) for stirring the finer material and the coarser material;
a feeding and conveying device (4) for conveying the fine material and the coarse material to the stirring host machine (3);
a finished product material conveying device (5) for conveying the homogeneous stirring material obtained by the stirring main machine (3) to a finished product material stacking bin (6);
the device comprises a clay bin (1) and a gravel bin, wherein the discharge holes of the clay bin (1) and the gravel bin are respectively provided with a screening device, the clay bin (1) and the gravel bin are respectively used for conveying fine materials and coarse materials to a conveying device (10) through the screening devices, and the conveying device (10) is used for conveying fine materials and coarse materials to a feeding conveying device (4); the screening device comprises a feeding cavity (7), a distributing cavity (8) and a discharging cavity (9) which are sequentially communicated from top to bottom, wherein a screen (701) is arranged in the feeding cavity (7), a first rotating shaft (801) is arranged in the middle of the distributing cavity (8), the first rotating shaft (801) is transversely arranged and uniformly provided with a plurality of blades (802), and the blades (802) can rotate around the axis of the first rotating shaft (801); the end of the blade (802) far away from the first rotating shaft (801) is bent towards the direction of reversing the blade (802); the finer materials screened out by the screen (701) can fall into a storage space between two adjacent blades (802); a sliding groove (803) is vertically formed in the side wall of the material distribution cavity (8), a sliding block (804) is connected in the sliding groove (803) in a sliding mode, a discharging hole (805) is formed in the middle of the sliding block (804), a first discharging pipe (806) is arranged on the outer side of the material distribution cavity (8), and the sliding block (804) slides up and down and is used for sealing or communicating the first discharging pipe (806); a bump (807) is arranged below the inner side end part of the discharging hole (805), first electromagnets (808) are arranged at the upper end and the lower end of the chute (803), and the magnetism of the first electromagnets (808) is changeable;
A first electromagnet (808) for attracting or repelling the slider (804), the protrusion (807) being capable of entering a rotation region of the blade (802) when the first electromagnet (808) repels the slider (804), the blade (802) being configured to drive the protrusion (807) out of the rotation region of the blade (802); when a first electromagnet (808) below the chute (803) sucks the sliding block (804), the discharging hole (805) is communicated with the first discharging pipe (806); the blades (802) rotate positively, and fine aggregate between adjacent blades (802) falls onto a fine aggregate collecting plate (1001) on a conveying device (10) from a discharging cavity (9); the blades (802) are reversed, and fine aggregate between adjacent blades (802) falls into the discharge holes (805); weighing sensors are arranged on the fine aggregate collecting plate (1001) and the screen (701);
when the blades (802) are reversed and any one blade (802) leaves the convex block (807), the back side surface of the blade (802) is gradually bent downwards;
both ends of the back side of any blade (802) are provided with stop strips (811);
nylon cloth (809) is arranged between every two adjacent blades (802), two ends of the nylon cloth (809) are respectively connected with the middle parts of the side surfaces of the two blades (802), a mass ball (810) is arranged in the middle of the nylon cloth (809), the mass ball (810) is arranged on the inner side surface which is close to the inward bending of the blades (802), and the mass ball (810) is used for driving the nylon cloth (809) to be inwards concave or outwards convex in the storage space;
The blending system further comprises a blending process comprising the steps of:
step one: mining earth materials;
step two: screening the mined soil materials, screening out coarse materials and fine materials, and classifying and stacking the coarse materials and the fine materials;
step three: transporting the coarse and fine materials to a blending site;
step four: detecting the water content omega and the P5 content of the coarse material and the fine material, and calculating the blending mass proportion alpha according to the water content omega and the P5 content;
step five: stirring and blending the coarse material and the fine material according to the blending mass proportion alpha to obtain a homogeneous stirring material;
step six: and transporting the obtained homogeneous stirring material to a finished product stacking bin.
2. The high earth dam non-uniform gravel-soil blending system according to claim 1, wherein the blending mass ratio α is calculated by the formula:
；
wherein: m, the mass of coarse materials; m' -bias mass; p (P) 5 -a particle content of the partial coarse material of more than 5 mm; p (P) 5 The particle content of the' -partial fine material with the particle size larger than 5 mm; omega-moisture content of coarse material; omega' -moisture content of the fines;-the content of particles with a particle size greater than 5mm in the final product.
3. The high-earth dam uneven gravel-soil material mixing system according to claim 1, wherein one end of the first discharging pipe (806) far away from the material distributing cavity (8) is connected with a storage box (11), the storage box (11) is communicated with the discharging cavity (9) through a second discharging pipe (12), and the second discharging pipe (12) is provided with a first electromagnetic valve (13).
4. The high-earth dam uneven gravel-soil material mixing system according to claim 1, wherein said feeding cavity (7) is in a shape of a cylinder which is transversely arranged, a second rotating shaft (702) which is coaxially arranged with said feeding cavity (7) is arranged in said feeding cavity (7), said second rotating shaft (702) is connected with a screen (701) and is used for driving said screen (701) to rotate around the axis of the screen; both ends of the screen (701) are respectively connected with the inner side surface of the feeding cavity (7) in a sliding way; a third discharging pipe (703) is arranged on one side of the feeding cavity (7), and the third discharging pipe (703) is used for conveying coarse aggregate to a coarse aggregate collecting plate (1002) on the conveying device (10); the baffle plates (704) are arranged on the other side of the feeding cavity (7), the upper part and the lower part of the screen (701) are respectively provided with a baffle plate (704), and the baffle plates (704) arranged above the screen (701) are second electromagnets which are used for adsorbing the screen (701); when the second electromagnetic adsorption is performed on one end of the screen (701), the third discharging pipe (703) is positioned above the other end of the screen (701); the third discharging pipe (703) is provided with a second electromagnetic valve (705).
5. A screening method, characterized in that it is carried out by means of a screening device according to claim 4, comprising the steps of:
S1: opening the discharge ports of the clay bin (1) and the gravel bin (2) to continuously feed into the feed cavity (7);
s2: controlling the first rotating shaft (801) to rotate positively and controlling the second rotating shaft (702) to rotate negatively so that coarse aggregate is left on the screen (701) and fine aggregate falls into the storage space of two adjacent blades (802) from the screen (701);
s3: when the weight weighed by a weighing sensor on the fine aggregate collecting plate (1001) reaches a set threshold value, controlling the first rotating shaft (801) to rotate reversely, controlling the first electromagnet (808) at the upper end of the chute (803) to generate repulsive force, and controlling the first electromagnet (808) at the lower end of the chute (803) to generate attractive force;
s4: at the moment, a weighing sensor on the screen (701) starts to work, judges whether the maximum weight reaches a set threshold value within a certain time, continuously feeds the screen if the maximum weight does not reach the set threshold value, and stops feeding if the maximum weight reaches or exceeds the set threshold value;
s5: after stopping feeding, at this time, the second electromagnet adsorption screen (701) is controlled, the second rotating shaft (702) is stopped to rotate, the second electromagnetic valve (705) is opened, and coarse aggregate is input to the coarse aggregate collecting plate (1002).
CN202210945177.3A 2022-08-08 2022-08-08 High-earth dam uneven gravel-earth material mixing system and screening method Active CN115301103B (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB655644A (en) * 1948-08-04 1951-07-25 Arthur Christian Avril Improvements in or relating to apparatus for mixing uniformly measured quantities ofseparate bulk materials
CN101831890A (en) * 2010-05-25 2010-09-15 葛洲坝集团第五工程有限公司 Blending construction method of blended gravelly soil for dam watertight core
CN102152400A (en) * 2011-01-28 2011-08-17 葛洲坝集团试验检测有限公司 Continuous mixing system for preparing impervious soil and control method
CN105082351A (en) * 2015-07-08 2015-11-25 中国电建集团成都勘测设计研究院有限公司 Production method of gravelly soil

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB655644A (en) * 1948-08-04 1951-07-25 Arthur Christian Avril Improvements in or relating to apparatus for mixing uniformly measured quantities ofseparate bulk materials
CN101831890A (en) * 2010-05-25 2010-09-15 葛洲坝集团第五工程有限公司 Blending construction method of blended gravelly soil for dam watertight core
CN102152400A (en) * 2011-01-28 2011-08-17 葛洲坝集团试验检测有限公司 Continuous mixing system for preparing impervious soil and control method
CN105082351A (en) * 2015-07-08 2015-11-25 中国电建集团成都勘测设计研究院有限公司 Production method of gravelly soil

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