KR20020011787A - Mobile concrete mixing plant - Google Patents

Abstract

PURPOSE: A mobile concrete mixing plant is provided to improve its mobility by adopting a compact structure able to be disposed on a wheel frame to be transferred to a construction site. CONSTITUTION: The mobile concrete mixing plant(100) comprises a base frame(101) forming an upper sheet of a portable trailer; a mixer(150) disposed on the base frame for preparing concrete by mixing aggregate, cement, paints, and water; plural storage tanks(110,120,130) for storing the aggregate, the cement, and the paints respectively; plural conveyor extending from each storage tank to the mixer; a water supply tank disposed on the base frame; and a water pipe connected between the water supply tank and the mixer. The storage tank spaced from the base frame is composed of a pillar(102) extended upward from the edge of the base frame, and a horizontal bar(103) crossing with the pillar. The mixer has plural input ports for the aggregate, the cement, and the paints, respectively.

Description

Mobile Concrete Mixing Plant {MOBILE CONCRETE MIXING PLANT}

The present invention relates to a concrete mixing plant for forming concrete by mixing aggregate, cement, pigment and water in a certain ratio, and more specifically to a concrete mixing plant that can be moved to the construction site to form colored concrete at the construction site It is about.

Colored concrete, which is generally used for pavement of roads, sidewalks, bicycle paths and parking lots, may adopt various colors depending on the local and environmental characteristics of the installation site. In addition, since the colored concrete penetrates the water such as rainwater into the ground due to the gap between the aggregates, water does not accumulate on the road surface even in rainy days, thereby preventing slippage or splashing. In addition, it is easy to maintain and has the same strength and durability as general concrete, but has the advantage that the time required for curing is relatively short. Due to this advantage, the use of colored concrete is gradually increasing.

However, colored concrete requires a different treatment and transportation process from the general concrete composition because the manufacturing process is not only different from the general concrete but also the amount of water to be added is much higher than that of the general concrete.

1 schematically shows a mixing plant for mixing and producing colored concrete.

Typically, colored concrete compositions are prepared by mixing aggregates, cement, pigments and water with admixtures, if necessary, in a concrete mixing plant 10 as shown in FIG. The aggregate stored in the aggregate storage tank indicated by reference numeral 11 is conveyed to the mixer 30 by the belt conveyor 21. In addition, the cement in the cement storage tank indicated by reference numeral 12 is conveyed by the screw conveyor 22 and the pigment in the pigment storage tank indicated by reference numeral 13 to the mixer 30 by the screw conveyor 23, respectively. These aggregates, cement and pigments conveyed into the mixer 30 are agitated in the mixer 30 together with the water supplied by the water supply pipe, mixed properly, and discharged from the bottom of the mixer 30 when they have an appropriate viscosity. The discharged colored concrete composition 40 is loaded on a transport truck 50 such as a dump truck waiting by the belt conveyor 31 disposed below the mixer 30, and then installed by the transport truck 50. Transported to the site.

However, the construction site where the colored concrete composition 40 will be installed may be located remote from this colored concrete mixing plant 10, in which case the composition 40 carried by the transport truck 50 may be partially hardened. There is. In addition, vehicles such as ready mixed concrete cars used for transporting conventional concrete are not suitable for transporting colored concrete compositions, and thus there is no preventive measure against hardening of the colored concrete compositions being transported. In addition, when the construction site is located at a distance from the above-described colored concrete mixing plant, expensive transportation costs are required to transport the colored concrete composition from the above-described mixing plant to the construction site.

U.S. Patent No. 5,171,121 discloses a "portable concrete batch plant." The mobile plant may be towed by a truck and moved near a construction site by being installed on a frame provided with wheels. However, the mobile plant is only for mixing and manufacturing conventional concrete, and as described above, a configuration for producing a colored concrete composition having a higher viscosity than the conventional concrete composition is not disclosed at all.

Accordingly, an object of the present invention is a concrete mixing plant for mixing and manufacturing aggregate, cement, pigment and water in a constant ratio, a mobile concrete mixing plant installed in a compact configuration on a wheeled frame to be moved to the construction site To provide.

1 is a schematic view showing an example of a concrete mixing plant according to the prior art;

Figure 2 is a perspective view illustrating the configuration of a mobile concrete mixing plant according to the present invention.

3 is a schematic rear perspective view of the plant shown in FIG. 2;

FIG. 4 is a conceptual diagram illustrating a discharger of a mixer used in the plant shown in FIG. 2 and colored concrete mixed by the mixer. FIG.

5 is a perspective view of the plant shown in FIG. 2 covered with a top cover for movement and connected to a tow truck;

<Explanation of symbols of main parts in drawings>

100: concrete mixing plant 101: lower frame

102: pillar 103: horizontal bar

104: side wall 105: cab

106: generator 107: cover

110: aggregate tank 111, 122: metering device

112, 159: belt conveyor 120: cement storage tank

123, 132: screw conveyor 130: pigment storage tank

140: water supply tank 141: water supply pipe

150: mixer 151, 152, 153: inlet

154: motor

In order to achieve the above object of the present invention, according to a preferred embodiment of the present invention, the lower plate consisting of the upper plate of the mobile trailer, disposed on the lower frame and mixed with aggregate, cement, pigment and water to form a concrete There is provided a portable concrete mixing plant comprising a mixer to formulate, and discharging means for discharging the concrete composition produced by the mixer to the outside, the mixer having respective inlets for inputting aggregate, cement and pigment. .

In order to achieve the above object of the present invention, according to another preferred embodiment of the present invention, the lower frame consisting of the upper plate of the mobile trailer, the aggregate disposed on the lower frame and each of the input through the plurality of inlets, Aggregate, cement, which is disposed at a predetermined height from the lower frame by a mixer which mixes cement, pigment and water to form concrete, a plurality of pillars extending upwardly from an edge of the lower frame, and a plurality of horizontal bars crossing the pillar; And a plurality of storage tanks for storing pigments respectively, a plurality of conveyors for respectively transporting aggregates, cement and pigments discharged from lower portions of the respective storage tanks to respective inlets above the mixer, and disposed on the lower frame. Feed water tank, and the water supply connected from the feed tank to the mixer Mobile concrete mixing plant is characterized in that is provided comprising a.

The plant may further include a discharge chute disposed under the mixer and opened and closed by pneumatic pressure, and a belt conveyor for transporting the concrete composition discharged from the discharge chute to the side of the lower frame.

The conveyor carrying the aggregate is preferably a belt conveyor, and more preferably provided with guides on both sides of the conveyor.

The conveyor for carrying the cement and pigment is preferably a screw conveyor.

Furthermore, the plant preferably further comprises a dust collector disposed around the cement inlet of the mixer.

Since the mobile concrete mixing plant according to the present invention is equipped with all the components necessary for the mixing of concrete on a trailer-shaped lower plate with wheels, the concrete mixing plant can be moved near the construction site to transport the concrete composition required for construction. The time required to do this is shortened. Thereby, the concrete composition is not only hardened during transportation but also can be supplied in a timely manner.

In addition, the mobile concrete mixing plant takes the appearance of a large container in which sidewalls and covers are installed, so that there is no fear of leakage of materials inside the plant and the appearance is good.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings, but the embodiments are not intended to limit or limit the present invention.

2 is a perspective view illustrating the configuration of a mobile concrete mixing plant according to the present invention.

The mobile concrete mixing plant 100 according to the present invention comprises a lower frame 101 in the form of a mobile trailer with wheels and a plurality of components disposed on the lower frame 101. On the lower frame 101, an aggregate storage tank 110, a cement storage tank 120, three pigment storage tanks 130, a water supply tank 140, and a mixer 150 are disposed.

Aggregate, cement, and pigment storage tanks 110, 120, 130 are each disposed at a height from the lower frame 101, and these tanks 110, 120, 130 each have a plurality extending upwardly from the edge of the lower frame 101. The pillars 102 are supported by a plurality of horizontal bars 103 intersecting the pillars 102 and these pillars 102. These pillars 102 and bars 103 are required to be made of high strength steel to support the heavy tanks 110, 120, 130.

On the other hand, reference numeral 104 designates a side wall on the right side that extends upwardly at the same height as the column 102 from the right edge of the lower frame 101. The side wall 104 extends upward from the entire edge of the bottom frame 101, but the side walls disposed in the remaining portions to illustrate the components of the mobile concrete mixing plant 100 of the present invention have been omitted. The side wall 104 forms a working room for arranging the various storage tanks 110, 120, 130, 140, the mixer 150, and the like.

In the aggregate storage tank 110 shown in FIG. 2, the upper edge is supported by the pillar 102 and the bar 103 at the right end of the lower frame 101. The storage tank 110 has an open top and aggregates having a constant particle size stored therein. Since the storage tank 110 takes the configuration of a mirror-shaped pyramid in which the lower portion gradually narrows, the aggregate can be easily discharged through the opening of the lower portion.

The aggregate metering device 111 is installed at the lower portion of the aggregate storage tank 110 to discharge a certain amount of aggregate from the storage tank 110 to be loaded on the belt conveyor 112 at the lower portion. The aggregate measuring device 111 measures the amount of aggregate to be discharged and controls it to be discharged in a predetermined amount, thereby preventing an excessive amount of aggregate from being discharged. On the other hand, the aggregate loaded on the belt conveyor 112 is moved upward left by the belt conveyor 112 is conveyed to the aggregate inlet 151 of the top of the mixer 150. The conveyed aggregate is introduced into the mixer 150 through an open inlet 151 and then mixed with other materials.

In the aggregate storage tank 110, a sensor for sensing humidity, which is not shown, may be installed. The sensor senses the humidity of the aggregate and sends it to the control computer, which helps the computer and the operator determine the water dose required for the concrete composition work.

The cement storage tank 120 is disposed on the left side of the aggregate storage tank 110. This cement storage tank 120 is also supported by the column 102 and the bar 103 at a predetermined height and is closed differently from the aggregate storage tank 110. The upper portion of the cement storage tank 120 is provided with a hatch 121 for connecting the air hose when supplying cement from the outside. Since the cement storage tank 120 is also configured to gradually narrow the lower portion, the cement stored therein can be easily discharged through the metering device 122 connected to the lower portion.

The metering device 122 adjusts whether or not the cement is discharged and discharged by adjusting a valve, and has a measuring device capable of measuring the discharged amount. On the other hand, the cement passed through the metering device 122 is moved to the lower right side of the screw conveyor 123 connected to the metering device 122, the upper left in the screw conveyor 123 by the rotation of the screw conveyor 123. Is carried until. Since the branch pipe 124 connected to the cement inlet 152 of the mixer 150 is installed at the upper left side of the screw conveyor 123, the cement is inside the mixer 150 through the branch pipe 124 and the inlet 152. And then mixed with other materials.

The screw conveyor 123 described above extends below the lower frame 101 through an opening formed in the lower frame 101 in the lower right side, and the upper left side extends higher than the horizontal bar 104. Therefore, the tilt is adjustable so that the cover 107 can be covered on the horizontal bar 104 as described in FIG. 5 to be described later for movement. That is, since the lower right side of the screw conveyor 123 is configured to be separated from the metering device 122, if necessary, by separating the lower right side from the metering device 122 and turning the screw conveyor 123 down and adjusting its inclination It is possible to prevent the upper left side from protruding beyond the horizontal bar 104.

There are three pigment storage tanks 130 arranged adjacent to the aggregate storage tank 110 and the cement storage tank 120, each of which pigment storage tanks 130 being of different colors, such as red, blue and yellow, respectively. Save the pigment. The pigment storage tank 130 is also supported by the pillars 102 and the bars 103 with the top closed. The hatch 131 for connecting the pigment air supply hose is installed in the closed upper portion as in the cement storage tank 120.

The pigment moves from the pigment storage tank 130 to a pigment metering device, not shown. The pigment metering device, like the cement metering device 122, is provided with a meter for measuring the amount of pigment discharged and a valve for adjusting the amount.

On the other hand, the pigment discharged downward from the pigment storage tank 130 through the discharge portion reaches the screw conveyor 132 for transporting the pigment, by the screw conveyor 132 the pigment inlet 153 above the mixer 150 Hauled up). Here, the pigment is introduced into the mixer 150 through the inlet 153 and mixed with other materials.

The water supply tank 140 is disposed on the right side of the aggregate storage tank 110. The water supply tank 140 is landed on the lower frame 101 and generally has a narrow upper portion and a wide lower portion. Water stored in the water supply tank 110 is introduced into the mixer 150 through the water pipe 141. Meanwhile, in FIG. 2, only one water supply tank 140 is illustrated for convenience, but another water supply tank 140 may be disposed on the left side of the aggregate storage tank 110 as shown in FIG. 3.

As described above, materials such as aggregate, cement, pigment, water, and the like introduced into the mixer 150 are stirred in the mixer 150 to be mixed with each other to form a concrete composition. Outside the mixer 150, two motors 154 for stirring the material are arranged, and only the left one is shown. The stirring operation of the mixer 150 will be described later with reference to FIG. 4.

The concrete composition mixed by the mixer 150 is discharged from the bottom of the mixer 150 and then conveyed to the lower left edge of the lower frame 101 by a discharge belt conveyor 159 disposed below the mixer 150. The concrete composition is then moved to a separate movable belt conveyor 160 disposed below the discharge belt conveyor 159 and loaded into the dump truck 170 on the left by the belt conveyor 160 to lay the concrete composition. To be transported to the construction site.

On the other hand, the cab 105 is arranged on the left side of the mixer 150. The driver may monitor and control the operation of the mobile concrete mixing plant 100 through manipulation of the monitor and the control unit in the cab 105. For example, when the driver detects the humidity of the aggregate from the humidity sensor attached to the aggregate storage tank 110, the driver adjusts the amount of water input to the mixer 150 by operating a computer accordingly. Alternatively, by inputting a working condition into a computer, the computer can be made to determine the input amount of various materials such as water by its own calculation.

In addition, a generator 106 is installed on the left side of the cab 105, and the generator 106 supplies power for the operation of the aforementioned various components.

3 is a schematic rear perspective view of the plant shown in FIG. 2.

In FIG. 3, a belt conveyor 112 is disposed below the aggregate storage tank 110 and the aggregate measuring device 111 below, and the aggregate is loaded on the belt conveyor 112 and transported toward the mixer 150. It is becoming. Guides 113 are provided on both sides of the belt conveyor 112 so that aggregates do not fall from the belt conveyor 112. Although these guides 113 are not shown in FIG. 2 for convenience, the guides 113 for preventing the aggregates from falling off and falling are required in the aggregate conveyor belt conveyor 112.

In addition, two feed water tanks 140 are disposed at both the aggregate storage tank 110 and the aggregate measuring device 111. These feed tanks are configured to have a lower thickness and a smaller thickness toward the top to have the maximum volume in a limited space.

FIG. 4 is a view of the mixer used in the plant shown in FIG. 2 as viewed in the direction of arrow A of FIG. 2, illustrating a mixer and the discharge of colored concrete mixed by the mixer.

Looking at the internal configuration of the mixer 150 shown in Figure 4, the mixer 150 is a hollow box form with an inner space 155 for stirring. The shower head 156 connected to the water supply pipe 141 is installed at the upper portion of the mixer 150, and two stirrers 157 for stirring the input materials, that is, aggregate, cement, pigment, and water, are provided below the shower head 156. ) Is installed. The stirrer 156 is provided with a plurality of stirring blades, respectively, while rotating the blades, the aggregate, cement, pigment, and water injected into the internal space 155 is stirred and mixed with each other to form a concrete. The stirrer 156 is connected to the motor 154 outside the mixer 150 and rotates according to the rotation of the motor 154, and in opposite directions, for example, the stirrer 156 on the right side is clockwise and the stirrer on the left side. 156 is configured to rotate counterclockwise.

Aggregate, cement, pigment and water mixed with each other by being stirred by the stirrer 156 form a concrete composition, and the concrete composition is discharged to the outside through a discharge chute 158 which is a discharge unit installed at the bottom of the mixer. When the discharge chute 158 is opened and closed in a pneumatic manner to control the discharge of the concrete composition. The discharged concrete composition is loaded on the discharge belt conveyor 159 under the discharge chute 158. At this time, since the discharge belt conveyor 159 is rotating in the direction of the arrow B, the loaded concrete composition will be carried to the left side of FIG. The concrete composition will then be loaded onto a mobile belt conveyor 160 and transported in a haul truck as described above.

FIG. 5 is a perspective view of the plant shown in FIG. 2 covered with a top cover for movement and connected to a tow truck. FIG.

The mobile concrete mixing plant 100 according to the invention shown in FIG. 5 has its internal components invisible by the side walls 104 and the cover 107 covering the top, which are arranged on each side. The cover 107 is preferably configured to cover the plant 100 as shown and moved and folded toward the cab 105 during operation of the plant 100 and unfolded during movement. As such, the cover 107 is installed together with the side wall 104, so that when the material is moved near the construction site by the tow truck 180, not only the material inside is prevented from escaping out of the plant 100 during the movement, The overall appearance of the plant 100 is good. In addition, by installing a dust collector in the work chamber formed of the side wall 104 and the cover 107 to absorb dust, the environment in the work chamber can be improved.

On the other hand, rocking occurs when the mobile concrete mixing plant 100 of the present invention runs on an unpaved road, and the computer, the measuring devices 111 and 122 and the measuring device may be impacted. These components require precise operation and are very sensitive to shocks. Therefore, the lower side of the lower frame 101 is provided with a shock absorbing device for absorbing the shock transmitted from the wheel and the axle. In addition, the installation of a first rubber pad or a special second rubber pad on the underside and the periphery of these components attenuates most of the impacts applied by absorbing the impacts on these components in two or three stages and thus configures them. The element can be protected.

As described above, the mobile concrete mixing plant according to the present invention is equipped with all the components necessary for mixing concrete on the lower plate in the form of a wheeled trailer, so that the concrete mixing plant can be moved near the construction site, which is necessary for construction. The time required to transport the concrete composition is shortened. Thereby, the concrete composition is not only hardened during transportation but also can be supplied in a timely manner.

In addition, the mobile concrete mixing plant takes the appearance of a large container in which sidewalls and covers are installed, so that there is no risk of material leaking out of the plant during movement and the appearance is good.

In addition, since the shock absorbing device is installed under the lower frame, it is possible to protect a large number of metering and measuring devices mounted on the plant and control devices such as computers from shocks.

Although the above has been described with reference to a preferred embodiment of the present invention, those skilled in the art to which the present invention pertains without departing from the spirit and scope of the invention as set forth in the claims below It will be appreciated that modifications and variations can be made.

Claims (9)

A bottom plate consisting of a top plate of a mobile trailer; A mixer disposed on the lower frame to mix concrete, cement, pigment, and water to form concrete; And And discharging means for discharging the concrete composition formed by the mixer to the outside, The mixer is a mobile concrete mixing plant, characterized in that it has a respective inlet for the aggregate, cement and pigment is introduced. A lower frame consisting of a top plate of a mobile trailer; A mixer disposed on the lower frame and mixing aggregate, cement, pigment, and water, each of which is introduced through a plurality of inlets; A plurality of storage tanks for storing aggregate, cement, and pigment respectively disposed at a predetermined height from the lower frame by a plurality of pillars extending upwardly from an edge of the lower frame and a plurality of horizontal bars intersecting the pillars; A plurality of conveyors respectively transporting aggregates, cement and pigments discharged from the lower portions of the respective storage tanks to respective inlets above the mixer; A water tank disposed on the lower frame; And And a water pipe connected to the mixer from the water supply tank. The method of claim 2, A mobile concrete mixing plant further comprising: a discharge chute disposed under the mixer and opened and closed by pneumatic pressure, and a belt conveyor for transporting the concrete composition discharged from the discharge chute to the side of the lower frame. The method of claim 2, The conveyor for carrying the aggregate is a mobile concrete mixing plant, characterized in that the belt conveyor. The method of claim 4, wherein Mobile concrete mixing plant further comprises a guide provided on both sides of the conveyor. The method of claim 2, The conveyor for conveying cement and pigment is a mobile concrete mixing plant, characterized in that the screw conveyor. The method of claim 6, The conveyor carrying the cement is a movable concrete mixing plant, characterized in that the tilt is adjustable. The method of claim 2, The mobile concrete mixing plant further comprises a sensor for sensing moisture attached to the aggregate storage tank. 3. A mobile concrete mixing plant as claimed in claim 1 or 2, further comprising a shock absorbing device at the bottom of the mobile trailer for damping the impact transmitted through the wheels.