KR100666074B1 - Conveyor with mixing device and mixed aggregate production system - Google Patents

Abstract

A conveyor with a mixing device and a mixed aggregate production system using the same are provided to automatically mix aggregates by collecting the aggregates on the edge of the conveyor to the center unit and mixing. A conveyor with a mixing device comprises a feeding belt(110), a driving motor(120), an idle roller(125), a horizontal roller, a slant roller and a power unit(130) supplying the rotation power with the driving roller. The idle roller rolls as a rotary shaft supporting the longitudinal both ends of the feeding belt together with a driving roller. The horizontal roller and the slant roller are positioned in the feeding belt between the driving roller and the idle roller to prevent the feeding belt from dropping. The horizontal roller is arranged in parallel to the ground. The slant roller is symmetrically slanted to the ground and mounted at right and left sides of the horizontal roller. The slant roller forms a steep slope toward the center unit step by step and then gets leveled again.

Description

Conveyor with mixing means and mixed aggregate production system using the same {Conveyor with mixing device and Mixed aggregate production system}

1 is a front view of a specific embodiment of the present invention.

2 is a plan view of a specific embodiment of the present invention.

Figure 3 shows the cross-sectional shape of the conveying belt of the conveyor with mixing means.

<Description of the symbols for the main parts of the drawings>

100: conveyor

110: Transfer belt

120: driving roller
125: Idle roller

121: horizontal roller 122: inclined roller

130: power unit

200: aggregate injection device

210: Hopper

220: blowing nozzle

230: nozzle opening and closing means

Field of technology

The present invention relates to a conveyor provided with a means for mixing aggregate and an apparatus for producing mixed aggregate using the same.

In general, aggregate is produced in the environment exposed to natural environment, that is, rain, snow, wind, etc., and is used to bring it to the site and use it. In addition, when aggregates of various particle sizes are mixed, the reality is that they are appropriately mixed and used at the time of site loading after single particle size. In particular, in the case of recycled aggregate using waste concrete, its use is limited to road auxiliary layers and so on, and the supply cost is very low. Therefore, it is difficult to access due to economic and technical problems. .

However, recently, the technology for producing recycled aggregates has been improved, and its use has been diversified. As a result, aggregates having various particle sizes are used. Also, there are an increasing number of cases requiring recycled aggregates having various particle sizes mixed according to the purpose of construction work. have.

Currently, the facilities that produce recycled aggregates are mainly produced by particle size through primary and secondary crushing processes, but in recent years, efforts have been made to develop technologies to remove the mortar attached to the surface of recycled aggregates as much as possible by performing third crushing. Increasingly, applications are being applied to actual sites. However, produced recycled aggregates are separated by particle size and exported to the construction site by particle size.

For example, in the case of road bases and road subsidiary layers in which mixed aggregates can be most actively used, the Korean Industrial Standards already specify the particle size range of aggregates, and when used for this purpose, the range of particle size must be observed. As such, maintaining the particle size in various ways is designed in consideration of the supporting capacity and fillability of the auxiliary base, and if the quality criteria are not satisfied, the above quality range may be adversely affected. do.

The following is an example of investigating the relevant quality standards and technical status of mixed aggregates used as base and subbase of roads.

The base layer is a part that is constructed at the bottom of the pavement layer or the middle layer, as shown in <Figure 1>, and is located below the relatively thin surface layer, so that the load pressure distribution transmitted to the base layer is high, so it can support and deform it. Use a material with sufficient resistance to

In general, the base can be classified into a particle size adjustment base, heated asphalt stabilized base, poorly mixed concrete base, and cement stabilized base according to the type of road and the design capacity. In most asphalt concrete pavement, heated asphalt stabilized base is used, and concrete pavement uses cement stabilized base or empty mixed concrete base. In the case of granular bases, granular materials are applied to small roads and roads with low design load.

<Figure 1> Composition of asphalt pavement and name of each layer

Standards for materials and construction for road foundations are defined differently depending on the type of road and the permissible design.

The Korean Industrial Standard (KS) does not have a separate quality standard for road substrate materials. It only specifies each test method that is applied in the specification, such as plasticity index, modified CBR, wear loss, and stability. .

(1) particle size adjustment base

The granularity base material specified in the Standard Specification for Road Construction and Road Pavement Design Guidelines established by the Ministry of Construction and Transportation shall be a mixture of durable crumbling stones, crumbling gravel, etc., with sand or other suitable materials. It does not include harmful substances such as clay, organic impurities and dust as a material, and the material is required to have at least two crushed surfaces with 70% or more of the weight remaining in the 4.75 mm sieve. Therefore, it must pass the quality regulation shown in <Table 1> and <Table 2> below. The material whose particle size is adjusted should be above 80 CBR and below 0.4mm (No.40), and the compaction degree used when obtaining the CBR of the particle size adjusting material is the maximum dry density according to the test method specified in KS F 2312. It should be 95% of.

<Table 1> Material Test Method and Standards for Standard Size of Grain Adjuster (Road Construction Standard Specification, Proof of Waste Concrete Recycling)

* The size of the sample used for the test shall be instructed by the supervisor.

* Slag and waste ash are yellow water and sulfur by immersion according to color determination test.

  The smell of hydrogen odor should be checked.

* When using slag as a synthetic material, follow the provisions of KS F 2535.

<Table 2> Standard Particle Sizes of Particle Size Control Base Material (Road Construction Standard Specification, Proof of Waste Concrete Recycling)

Since the particle size adjustment base maintains the supporting force due to the engagement of the aggregate, the supporting force becomes weak when there is an influence by rainfall or groundwater. Therefore, the groundwater may be affected by the groundwater even if it does not exist. Until now, the use of granularity adjustment base is known to limit the bearing capacity. Therefore, the groundwater should be used on local roads or urban roads, not on major highways or highways. I am doing it. There are no quantitative regulations for the inclusion of mud mass, bark, dust and other harmful substances in the particle size adjustment base material, but they should not be used when containing or incorporating harmful substances. When the waste concrete is used as a base material, there is a possibility that the cleanliness is insufficient and some miscellaneous goods are mixed, unlike the case of crushing the normal bed or raw stone. Therefore, it should not be used when it is deemed to be harmful to the base, directly or indirectly, as it is the main cause of harmful effects on bearing capacity and water content.

As shown in <Figure 2>, the subbase is located in the middle of the surface layer and the road along with the base layer to distribute the traffic load transmitted through the surface layer and the base layer to transfer it to the road. In addition to such structural functions, the subbase prevents subgrade fine grains from penetrating into the base layer, minimizes damage caused by freezing, and serves as a work path for construction equipment.

The auxiliary base must have sufficient bearing capacity and be a durable material and contain no organic impurities or other harmful substances. Therefore, in order to utilize waste concrete as an auxiliary base, it is necessary to thoroughly separate foreign substances such as wood and reinforcing bars during the waste concrete sorting process. Since waste concrete differs depending on the site conditions, collection methods, and screening process when collecting raw materials, it must be approved by the management authority or be instructed by the management authority before use. The thickness required for the subbase is divided into upper subbase and lower subbase according to economic or mechanical functions. The lower subbase is made of relatively low bearing capacity and inexpensive materials, while the upper subbase is made of high quality materials.

<Figure 2> Construction Location of Subbase in Asphalt Pavement Configuration

The auxiliary base material uses economical materials with relatively low strength such as mortar, steel slag and sand, and is easy to obtain near the site. Considering the structural functions of the auxiliary base layer, the following effects can be obtained.

  * Prevents infiltration of fine-grained sand into the substrate

  * Minimizing damage effect by freezing action

  * Prevents sedimentation of permeated water in the pavement or lower

  * Provision of work for construction equipment

If the subgrade quality is good, the auxiliary base may be excluded from the pavement, so it is not necessarily applied to all road works.

The quality standards of the auxiliary base material stipulate the plasticity index, modified CBR value, wear loss, sand equivalent and liquid limit value. The standard values are the same in all specifications and KS standards. In other words, it is not necessary to apply the quality standards of natural aggregate and recycled aggregate separately, because it can be selected in consideration of the material quality and the economic feasibility in the vicinity of the site, rather than the quality regulation rather relaxed than the base material.

<Table 3> and <Table 4> below show the quality standards and standard granularity of aggregates applied to the road auxiliary layer. In principle, materials belonging to the standard particle size should be used. However, considering the importance of the road and material conditions, if the maximum particle size of the aggregate is larger than the standard size, it can be used when there is no problem in the quality and construction of the auxiliary base as continuous particle size. have.

Since waste concrete has a particle size distribution difference depending on the crushing process, even if it is within the standard particle size range, the particle size after compaction may vary depending on the weight or vibration of compaction equipment during compaction work. Action should be taken.

<Table 3> Quality Standards for Auxiliary Base Materials (Standard Specification for Road Works, Special Specification for Highway Works, KS F 2574)

The auxiliary base material uses a material of quartz CBR 30 or more, but a material of quartz CBR 30 or less or a plasticity index of 6 or more is stable and used with a small amount of cement or lime. The modified CBR test is to be conducted by KS F 2320 (Test Method of Subsoil Soil Capacity (CBR)), and the modified CBR value is CBR equivalent to 95% of the maximum dry density.

If the fine particles are large, problems such as deterioration of bearing capacity or poor drainage may occur. Therefore, the amount of passage of 0.08mm sieve should be 10% or less in principle. However, non-plastic materials such as cement powder, not clay powder, if the amount of passage of 0.08mm is more than 10%, it can be evaluated by the bearing test, etc., and approved by the owner.

<Table 4> Standard Grain Sizes of Recycled Aggregate for Auxiliary Bases

Prior art

Currently, in the construction of roads and ground works, recycled aggregates using construction waste have been gradually used. However, in order to be applied to aggregates suitable for the purpose of each construction, the exact granularity range and its plasticity when used as the base of roads Index, modified CBR, wear loss, stability, etc. must be satisfied, and when used as auxiliary base, liquid limit, wear loss, plasticity index, modified CBR, sand equivalent, etc. must be satisfied. However, in order to satisfy these quality regulations, despite having to secure particle size distribution of aggregated crushed and recycled aggregates and stability and drainage of aggregates, there is still no production process and equipment for producing recycled aggregates that maintain accurate quality and particle size distribution. After carrying in on site by particle size (on site by maximum size of aggregates such as 10 mm and 40 mm or less), the mixture is laid and compacted, which causes severe quality deviation and difficulty in site management.

In other words, in the past, aggregates produced for each particle size are transferred to a site and then constructed without a separate quantitative mixing process. Therefore, the particle size distribution of the aggregate can be used in a state that does not meet the specification, there is a problem that can not meet the required quality. In addition, the Korean Industrial Standard has already specified the particle size distribution of related parts to improve these problems, but there is no accurate supply system because there is no production system that can satisfy this problem.

In other words, it is a process of bringing aggregates by particle size into the site and mixing them at the site, and the problem is increased as the field work, difficulty in securing the prescribed particle size range of aggregate, difficulty in quality verification and management. .

The object of the present invention created to solve the above problems is as follows.

First, it is an object of the present invention to provide a means capable of producing a mixed aggregate accurately mixed by particle size.

Secondly, another object of the present invention is to provide a means by which the mixing of aggregates can be automatically performed during the transfer of aggregates using a conveyor.

Third, to provide a mixed aggregate that does not require a separate mixing process in the construction site to improve the workability and quality of the site as another object of the present invention.

The configuration of the present invention for achieving the above object is as follows.

The present invention is a power belt 130 for transmitting the rotational force to the conveying belt 110, the driving roller 120, the idle roller 125, the horizontal roller 121, the inclined roller 122 and the drive roller 120 In the conveyor 100 is configured to include, the idle roller 125 serves as a rotating shaft for supporting both ends in the longitudinal direction of the transfer belt 110 together with the drive roller 120, the horizontal roller 121 And the inclined roller 122 is arranged in the inner space of the transfer belt 110 between the drive roller 120 and the idle roller 125 serves to prevent sagging of the transfer belt 110, the Horizontal rollers 121 are arranged parallel to the ground, the inclined rollers 122 are symmetrically arranged to be inclined with the ground on the left and right sides of the horizontal rollers 121, stepwise toward the horizontal rollers 121 Gather towards the center to form a steep slope and then back to its original state Is heat relates to a conveyor provided with a mixing means, characterized in that the spread in the original state and then again collected step by step toward the central folded upwardly in the transfer process, the lateral side end portions of the conveyance belt 110. The

In addition, the present invention is configured to include a plurality of aggregate input device 200 and the conveyor 100 is installed on the plurality of the aggregate input device 200, the conveyor 100, the transfer belt 110 , A driving roller 120, an idle roller 125, a horizontal roller 121, an inclined roller 122, and a power unit 130 for transmitting rotational force to the driving roller 120, wherein the idle roller 125 serves as a rotating shaft for supporting both ends of the conveyance belt 110 in the longitudinal direction together with the driving roller 120, the horizontal roller 121 and the inclined roller 122 is the driving roller 120. ) Is arranged in the inner space of the conveying belt 110 between the idle roller 125 and serves to prevent sagging of the conveying belt 110, the horizontal roller 121 is arranged in parallel with the ground, The inclined roller 122 is symmetrical to form an inclination with the ground on the left and right sides of the horizontal roller 121. Arranged toward the center to form a steep inclination toward the horizontal roller 121, and then arranged so as to be unfolded in the original state so that the transverse both ends of the conveying belt 110 is folded upward stepwise in the transfer process It is provided with a mixing means to be unfolded back to the original state after collecting toward, the aggregate input device 200, each of the hopper 210 for storing the aggregates separated for each particle size; A spray nozzle 220 installed at the lower portion of the hopper 210; And a nozzle opening / closing means (230) for controlling the opening and closing of the ejection nozzle (220).

Hereinafter, with reference to the accompanying drawings, a specific embodiment of the present invention will be described in detail.

1 to 3, the rotational force is transmitted to the conveying belt 110, the driving roller 120, the idle roller 125, the horizontal roller 121, the inclined roller 122, and the driving roller 120. Conveyor 100 is shown that includes a power unit 130 to.

The driving roller 120 rotates by the power unit 130 and serves to transmit the rotational force to the conveyance belt 110.
The idle roller 125 serves as a rotating shaft supporting both ends in the longitudinal direction of the conveyance belt 110 together with the driving roller 120.
The idle roller 125 is interlocked with the transfer belt 110 as the driving roller 120 rotates.
As shown in FIGS. 1 and 3, the horizontal roller 121 and the inclined roller 122 are arranged in the inner space of the conveying belt 110 between the driving roller 120 and the idle roller 125. To prevent sagging.
The horizontal rollers 121 are arranged in parallel with the ground as shown in Figure 3, the inclined rollers 122 are arranged symmetrically so as to be inclined with the ground on the left and right sides of the horizontal rollers 121.

The inclined rollers 122 are arranged toward the horizontal rollers 121 so as to gather toward the center to form steep slopes step by step and then open back to the original state. Both ends of the transverse belts 110 in the transverse direction are inclined rollers 122 during the transfer process. ) Is folded upwards step by step and collected toward the center and then unfolded again.

As such, the aggregate placed on the edge of the transfer belt 110 is collected to the center and the aggregate is naturally mixed through the transfer process.

That is, a separate mixing process is not provided, but the mixing is carried out at the same time as the conveying process of the aggregate is a feature of the conveyor 100 of the present invention.

1 and 2, there is shown a mixed aggregate production apparatus using such a conveyor (100).

Mixed aggregate production apparatus is configured to include a plurality of aggregate input device 200 and the conveyor 100 is installed on the lower portion of the aggregate input device (200).

Conveyor 100 is a conveying belt 110, a driving roller 120, an idle roller 125, a horizontal roller 121, an inclined roller 122, and a driving roller 120 as shown in Figs. It is configured to include a power unit 130 for transmitting a rotational force to), the idle roller 125 serves as a rotating shaft for supporting both ends in the longitudinal direction of the conveying belt 110 with the drive roller 120, horizontal roller (121) and the inclined roller 122 is arranged in the inner space of the conveying belt 110 between the drive roller 120 and the idle roller 125 serves to prevent sagging of the conveying belt 110, horizontal roller 121 is arranged in parallel with the ground, the inclined roller 122 is symmetrically arranged so as to be inclined with the ground on the left and right sides of the horizontal roller 121.

Aggregate input device 200, each of the hopper 210 for storing the aggregates separated by the particle size, the injection nozzle 220 is installed in the lower portion of the hopper 210, and the nozzle opening and closing for controlling the opening and closing of the jet nozzle 220 And means 230.

The hopper 210 is a kind of storage tank in which aggregates separated for each particle size are stored.

It is installed at the lower portion of the hopper 210 of the jet nozzle 220 serves as a passage for discharging the aggregate stored in the hopper 210 to the outside.

Although the nozzle opening and closing means 230 controls the opening and closing of the jet nozzle 220, detailed drawings are omitted in the accompanying drawings, but a method of controlling the open cross-sectional area of the jet nozzle 220 may be selected by including a sliding door. .

According to a specific embodiment of the mixed aggregate production apparatus using a conveyor provided with a mixing means of the above configuration, the aggregate stored separately for each particle size is ejected to the conveying belt 110 through the ejecting nozzle 220.

In this case, when the mixing ratio of the aggregates for each particle size is determined, the open cross-sectional area of the jet nozzle 220 of the hopper 210 separately stored for each particle size may be adjusted according to the mixing ratio. This is because the amount of aggregate emitted per unit time is determined in proportion to the open cross-sectional area.

When the sliding door is provided as the nozzle opening and closing means 230, the open cross-sectional area of the jet nozzle 220 can be easily adjusted.

Aggregate ejected at a predetermined rate from each hopper 210 is naturally mixed while the aggregate is collected to the center of the conveying belt 110 by the inclined roller 122 in the process of conveying along the conveying belt 110 The mixed aggregate is then transported to the truck's loading box and transported to the construction site for immediate use on site.

Technical effects according to the present invention of the above configuration is as follows.

First, it is an object of the present invention to provide a means capable of producing a mixed aggregate accurately mixed by particle size.

In other words, by properly adjusting the open cross-sectional area of the blow nozzle of the hopper separately stored for each particle size, it is possible to accurately adjust the mixing ratio for each particle size.

Secondly, another object of the present invention is to provide a means by which the mixing of aggregates can be automatically performed during the transfer of aggregates using a conveyor.

In other words, the conveyor used in the present invention is to collect the aggregate at the edge of the conveying belt to the center by using the inclined roller in the conveying process to mix. Therefore, the mixing between the aggregate is made automatically in the process of conveying the conveying belt.

Third, to provide a mixed aggregate that does not require a separate mixing process in the construction site to improve the workability and quality of the site as another object of the present invention.

In other words, the transfer and mixing is carried out at the same time on the conveyance belt and the mixed aggregate is transported to the construction site, which eliminates the need for a separate aggregate mixing process, which shortens the working time and accurately adjusts the mixing ratio by particle size. There is always a constant quality.

Claims (3)

Conveying belt 110, drive roller 120, idle roller 125, horizontal roller 121, inclination roller 122 and the drive device 120 for transmitting a rotational force to the drive roller 120 In the conveyor 100, The idle roller 125 serves as a rotating shaft for supporting both ends in the longitudinal direction of the transfer belt 110 together with the drive roller 120, The horizontal roller 121 and the inclined roller 122 are arranged in the inner space of the conveying belt 110 between the driving roller 120 and the idle roller 125 to prevent sagging of the conveying belt 110. Play the role of The horizontal roller 121 is arranged parallel to the ground, The inclined rollers 122 are symmetrically arranged so as to be inclined with the ground on the left and right sides of the horizontal rollers 121, so that the inclined rollers are collected toward the center so as to make steep incline toward the horizontal rollers 121 and then unfolded to the original state. Conveyor with a mixing means is arranged, characterized in that both ends of the transverse direction of the conveying belt 110 is folded upward step by step in the conveying process is collected toward the center and then unfolded again. Consists of a plurality of aggregate input device 200 and the conveyor 100 is installed on the lower of the plurality of aggregate input device 200, The conveyor 100, Conveying belt 110, drive roller 120, idle roller 125, horizontal roller 121, inclination roller 122 and the drive device 120 for transmitting a rotational force to the drive roller 120 The idle roller 125 serves as a rotating shaft supporting both ends of the conveyance belt 110 in the longitudinal direction together with the driving roller 120, and the horizontal roller 121 and the inclined roller 122 are Arranged in the inner space of the conveying belt 110 between the drive roller 120 and the idle roller 125 serves to prevent sagging of the conveying belt 110, the horizontal roller 121 and the ground Arranged in parallel, the inclined rollers 122 are symmetrically arranged so as to be inclined with the ground on the left and right sides of the horizontal roller 121, collected toward the center to form a steep incline toward the horizontal roller 121, The transfer belt 110 is arranged to be opened back to the original state After the lateral side end portions combined step by step toward the central folded upwards in the transfer process and is provided with a mixing means expands to its original position again, The aggregate input device 200, respectively, Hopper 210 for storing the aggregate separated for each particle size; A spray nozzle 220 installed at the lower portion of the hopper 210; And, Nozzle opening and closing means 230 for controlling the opening and closing of the jet nozzle 220; Mixed aggregate production apparatus using a conveyor provided with a mixing means comprising a. The method of claim 2, wherein the nozzle opening and closing means 230, Mixing aggregate production apparatus using a conveyor with a mixing means, characterized in that for controlling the open cross-sectional area of the jet nozzle 220 by having a sliding door.

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