JP2005091309A - Metering apparatus of aggregate and water, and spray system of cement based fluid solidification agent using it - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To compound a cement based fluid solidification agent according to a specified mix proportion by eliminating variation in evaluation of percentage of surface moisture caused by batch processing. <P>SOLUTION: A metering apparatus 1 comprises a metering tub 4 which is suspended by three points from a frame 3 through three aggregate metering load cells 2 which are a first mass metering means, a water metering tub 6 supported on the frame 3 through a water metering load cell 5 which is a second mass metering means, a water receiving apparatus 7 attached to the frame 3 below a drain opening formed on the bottom of the water metering tub, a pressurizing vessel 9 which is attached to the frame 3 and connected, for communication, to the bottom of the water receiving apparatus 7 through a valve 8, and a hopper 10 attached to the frame 3 under the metering tub 4. A jack base 71 adjustable to variable heights is attached to the leg part of the frame 3. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an aggregate having different surface water conditions, an aggregate for measuring water, a water measuring device, and a cement-based fluidized solid material spraying system using the aggregate.

  When mixing mortar and concrete on site, the amount of water has a great influence on the strength of the mortar, so it is necessary to manage it well during mixing. However, aggregates, especially fine aggregates, are used in storage conditions and climate. The moisture content varies depending on the conditions, etc.When the wet aggregate is used, the amount of water in the mortar increases by the amount of surface water of the fine aggregate, and when the dry aggregate is used, the amount of water in the mortar is effectively absorbed. Decrease by the amount.

  Therefore, it is extremely important to maintain the quality of the mortar according to the formulation by correcting the amount of water at the time of mixing according to the dry and wet conditions of the aggregate.

  Here, since the stored aggregate is generally often wet, it is common to measure the surface water ratio in advance as an indicator of the dryness and wetness of the aggregate, and adjust the amount of mixing water based on the measured value Is. And, the measurement of the surface water ratio is conventionally performed by taking a small amount of sample from a storage container called a stock bottle in which aggregates are stored and measuring the mass and the mass in an absolutely dry state. And the water absorption rate of the surface dry state measured in advance.

  However, in such a measurement method, the total surface water ratio is only estimated from a small number of samples, so there is a limit in terms of accuracy. On the other hand, a heating furnace is used to measure the absolutely dry mass. Therefore, it is unrealistic in terms of economy and time to collect an amount close to the amount actually used and use it as a sample.

  In order to solve this problem, the present applicant has developed a measuring method using water-immersed aggregate. According to such a water immersion aggregate measurement method, it is possible to accurately determine the masses of water and aggregate in a dry state in a state in which the surface water of the aggregate is reflected without knowing the surface water ratio of the aggregate. it can.

  In addition, in spray mortar used for slope construction, the amount of aggregate is large, so even if the filling rate is high, the aggregate cannot be immersed in water. However, the applicant has newly developed a device that can measure aggregates and water with sufficient accuracy while taking advantage of water immersion aggregate measurement. developed.

JP 2003-39420 A JP 2000-39421 A

  However, when spraying mortar, etc., aggregates and water are measured according to the amount equivalent to one batch of spraying machine, so the aggregate to be put into the measuring device is also sprayed. It will be adjusted to the amount corresponding to one batch of the machine.

  Here, the aggregate put into the measuring device is transported from the aggregate storage place or the storage bin to the aggregate conveyor belt conveyor. For example, the work starts the next day with the work of the previous day still completed. If the batch processing is interrupted due to a break of the worker or the like, the aggregate is left on the aggregate conveyor belt conveyor, and such aggregate is dried according to the weather conditions at that time. Or it may get wet in the rain.

  Therefore, even if there is no problem when the batch processing is performed continuously one after another, as described above, when the batch processing is interrupted, the aggregate left on the aggregate conveyor belt conveyor The surface water ratio is greatly different from the surface water ratio of the aggregate stored in the aggregate storage area or the storage bin, and there has been a problem that it is not appropriate to measure water immersion using such aggregate.

  In addition, when weighed water-soaked aggregate, wet aggregate and correction water (secondary water) are discharged from the metering device and transported by the belt conveyor for transporting the metered aggregate, Even if the water is accurately measured, not only correction water but also water in the water-immersed aggregate spills from both sides of the conveyor belt for measuring aggregate transport or adheres to the belt conveyor for transport of measured aggregate For this reason, there has also been a problem that the amount of water according to the indicated composition is not charged into the intermediate mixer or sprayer.

  The present invention has been made in consideration of the above-described circumstances, and can eliminate the variation in the evaluation of the surface water ratio caused by the interruption of batch processing, thereby allowing the cement-based fluidized material to be blended as indicated. It is another object of the present invention to provide a water metering device and a cement-based fluidized material spraying system using the same.

  Moreover, this invention provides the spraying system of the aggregate and water metering apparatus which can carry out the final injection | throwing-in of correction | amendment water (secondary water) to a spraying machine, and the cement-type fluidization solidification material using the same. For the purpose.

  In order to achieve the above object, the aggregate and water metering device according to the present invention comprises, as described in claim 1, a water immersion box body below a box body having an aggregate input opening formed at the top. The wetting box body communicates with a water-immersed aggregate housing space formed inside the water-immersing box body and a wet aggregate housing space formed inside the wetting box body. As described above, the measuring tank body is configured by being connected in a bifurcated manner, and the bottom opening of the water immersion box body and the bottom opening of the wetting box body are respectively formed by a water immersion bottom cover and a wet bottom cover. A measuring tank configured to be closed, a pedestal for supporting the weighing tub via a first mass measuring means, and supported by the pedestal via a second mass measuring means via a predetermined water supply means Water measuring tank capable of storing and measuring supplied water, and the water meter A water receiver attached to the gantry at a position below a drain outlet formed at the bottom of the tank; a pressurized container attached to the gantry and connected to the bottom of the water receiver via a valve; An aggregate attached to the gantry at a lower position of the measuring tank and a hopper for receiving and dropping water and the hopper for receiving and dropping water; A water level meter is installed in the water storage space communicated with the water-immersed aggregate storage space so that the aggregate in the space does not substantially invade, and the water storage space is provided in the pressurized container. It is configured to be connected to the water supply port so that water in the pressurization vessel can be pumped to the water storage space via the first water supply port by press-fitting air from an air supply port provided in the pressurization vessel. An aggregate and water metering device comprising: The secondary water can be pumped to the kneading means by providing the secondary water supply port as a secondary water supply port, and the aggregate input from the input opening is stored in the immersion aggregate storage space or the wet aggregate storage. An operation means for oscillating the insertion direction guide plate in the box body and arranging the insertion direction guide plate for selective introduction into the space so as to be able to swing around the horizontal axis at the lower edge thereof. It is provided in the weighing tank body.

  In the aggregate and water metering device according to the present invention, the operating means includes a swing rod installed horizontally through the box body and attached to a lower edge of the loading direction guide plate, and the swing rod It is comprised with the air cylinder for guide plates which connects a front-end | tip and the said measurement tank main body.

  In the aggregate and water metering device according to the present invention, in the water immersion box body, a maintenance opening is provided so as to communicate with the water accommodating space, and a closing plate for watertightly closing the maintenance opening is removable. The water level meter is attached to the back side of the closing plate, and a water injection pipe or a water injection hose connected to the first water supply port is connected to a water supply port attached to the closing plate.

  In the aggregate and water metering device according to the present invention, the bottom portion of the hopper is inclined according to the transport inclination angle of the belt conveyor for measuring aggregate transport, and the rectangular discharge port having the tilt direction as the longitudinal direction is formed. A pair of belt-like elastic materials whose bottom edge slides on the belt surface of the belt conveyor for measuring aggregate transport and whose width in the short direction is set to be equal to or less than the width of the belt conveyor for measuring aggregate transport The hopper is suspended along each longitudinal edge of the rectangular discharge port, and the hopper is attached to the gantry so that the water immersion box body is located on the inclined upward side of the hopper.

  In the aggregate and water measuring device according to the present invention, the bottom cover for wetting is constituted by a pair of double-opening lids, and the central axis of opening and closing is parallel to the longitudinal direction of the rectangular discharge port. It is configured.

  In the aggregate and water metering device according to the present invention, a conveying aggregate height adjusting plate for controlling the aggregate height placed on the measuring aggregate conveying belt conveyor is provided on the inclined upward side of the hopper. It can be adjusted freely.

  In addition, the cement-based fluidized material spraying system according to the present invention includes a metering device according to any one of claims 1 to 6, an aggregate storage means, and the bone as described in claim 7. An aggregate conveyor belt conveyor disposed so that the transport start position is positioned below the discharge opening of the material storage means and the transport end position is positioned above the input opening of the weighing tank body; and transported below the hopper A measuring aggregate conveying belt conveyor arranged so that a starting position is positioned; an intermediate mixer arranged so that an input opening is positioned below a conveying end position of the measuring aggregate conveying belt conveyor; An intermediate conveyor belt conveyor disposed so that the transport start position is positioned below the discharge opening of the mixer, and the mixer below the transport end position of the intermediate conveyor belt conveyor And a deployed spraying machine so that the inlet opening is positioned, in which the kneading space of the intermediate mixer and communicatively connected to the secondary water for water supply port provided in the pressurized vessel.

  According to the present invention, there is provided a cement-based fluidized material spraying system comprising: a weighing device according to any one of claims 1 to 6; an aggregate storage unit; and a discharge opening of the aggregate storage unit. An aggregate transfer belt conveyor positioned so that the transfer start position is positioned and the transfer end position is positioned above the charging tank main body opening, and the transfer start position is positioned below the hopper A metering aggregate conveying belt conveyor, and a spraying machine disposed so that a mixer charging opening is positioned below a conveyance end position of the measuring aggregate conveying belt conveyor, and kneading the spraying machine The space is connected in communication with a secondary water supply port provided in the pressurized container.

  The aggregate and water measuring apparatus according to the present invention is an apparatus based on the premise of batch processing, that is, the aggregate and water necessary for kneading a certain amount (one batch) of cement-based material are measured. It is an apparatus that repeatedly performs the process of discharging.

  In such an aggregate and water metering device and a cement-based fluidized material spraying system using the same, aggregates stored in aggregate storage means such as stock bins and aggregate storage places, in particular fine aggregates, are aggregated. It is transported by a conveyor belt conveyor, and such aggregate is introduced into the main body of the measuring tank through the input opening formed at the top of the box body, and water fed from the pressurized container is supplied to the main body of the measuring tank, These are weighed, but in a situation where the batch processing is interrupted and the aggregate is left on the aggregate conveyor belt conveyor, the aggregate corresponding to one batch is charged in three portions.

  That is, first, the first input amount is set as an aggregate on the aggregate conveyor belt conveyor (hereinafter referred to as a first aggregate) that has been placed at the end of the previous measurement. In the first loading, the loading direction guide plate is placed at the lower edge so that the first aggregate loaded from the loading opening is selectively loaded into the wet aggregate housing space in the wet box. Swing around the horizontal axis in advance in the box. The throwing direction guide plate is swung to the side that closes the water-immersed aggregate accommodation space by operating the operating means provided in the measuring tank body.

  In this way, the first aggregate whose surface water ratio fluctuates on the aggregate conveyor belt conveyor due to the interruption of the batch process is thrown from the box opening and then hits the loading direction guide plate. Or directly into the wet aggregate housing space and not into the water-immersed aggregate housing space.

  Next, the mass of the first aggregate put into the wet aggregate accommodation space in this state is measured using the first mass measuring means. The first mass measuring means may be constituted by, for example, a tension type load cell, and the upper end of the first mass measuring means may be fixed to the gantry to suspend the measuring tank.

  When the first aggregate is put into the wet aggregate housing space and the measurement is finished, the operating means is operated to swing the loading direction guide plate in the opposite direction to the side closing the wet aggregate housing space. To do.

  Next, in this state, the aggregate (second aggregate) that is stored in the aggregate storage means such as a stock bin or an aggregate storage place and used for water immersion measurement is used as an aggregate conveyor belt conveyor. Then, it is fed from the box opening.

  In this case, after the second aggregate is thrown from the throwing opening of the box body, the second aggregate hits the throwing direction guide plate or is directly thrown into the water-immersed aggregate accommodating space. It is not thrown into space.

  Here, when putting the second aggregate into the water-immersed aggregate accommodation space in the water immersion box, water having a known mass is supplied to the water-immersed aggregate accommodation space in advance.

  The procedure for supplying water to the immersed aggregate storage space is as follows.

First, water is supplied to the water measuring tank through a predetermined water supply means, and the water supply amount M _I is measured using the second mass measuring means. The second mass measuring means may be constituted by, for example, a tension type load cell, and the upper end of the second mass measuring means may be fixed to the gantry and the water measuring tank may be suspended.

  When the water measurement is finished, open the drainage port formed at the bottom of the water metering tank, transfer the water stored in the water metering tank to the water receiver, and then add the water in the water receiver. Transfer to a pressure vessel.

  When the metered water has been transferred to the pressurized container, the valve communicating with the water receiver is closed and air is injected with an air compressor or the like through the air supply port formed in the pressurized container. The first water supply opening constituting one is opened, and the water in the pressurized container is pumped to the water storage space communicating with the immersion aggregate storage space.

  In this way, the pumped water is filled at the same water level not only in the water storage space but also in the water-immersed aggregate storage space communicating therewith.

Next, if the second aggregate is put into a water-immersed aggregate housing space filled with the previously supplied water so as to be in a water-immersed state, the first aggregate in the measuring tank is in such a state. The mass of the second aggregate and water is measured by the first mass measuring means, and the mass of the first aggregate is subtracted from the measured value to obtain the second aggregate and water, that is, all of the water-immersed aggregate. The mass _Mf is calculated. Further, the water level of the water storage space is measured with a water level meter installed in the water storage space, and the total volume V _f of the second aggregate and water, that is, the water-immersed aggregate is calculated from the measured value.

In this way, the mass M _a of the second aggregate in the surface dry state and the mass M _w of water (primary water) in a state including the surface water of the aggregate can be calculated from the following equation. .
M _a + M _w = M _f (1)
M _a / ρ _a + M _w / ρ _w = V _f (2)

Here, ρ _a is the density of the aggregate in the surface dry state, and ρ _w is the density of water.

Incidentally, the amount of air in the water-immersed aggregate as a (%), in place of the V _f, the joint use of such a _{· V f (1-a /} 100), a higher precision taking into account the amount of air Weighing is possible.

  Needless to say, the aggregate mass and water measurement accuracy with water-immersed aggregates, but in summary, even with wet aggregates, the surface water is included in the primary water so that the amount of water can be accurately grasped. In addition, the aggregate can also be grasped as the mass in the surface dry state as shown in the formula.

Next, the total mass M _f and the water supply amount M _I are substituted into the following equation to obtain the mass M _aw of the aggregate in the wet state.
M _aw = M _f −M _I (3)

Next, the surface water ratio of the aggregate is obtained by substituting M _aw into the following equation.
(M _aw -M _a ) / M _a (4)

  If the surface water ratio of the second aggregate is measured, the surface water ratio is applied to the first aggregate to obtain the first aggregate in the surface dry state, and then the first, The mass of the third aggregate in the surface dry state is calculated by subtracting the mass of the second aggregate from the aggregate mass determined by the formulation.

  Next, the mass of the surface water is obtained by multiplying the calculated mass of the third aggregate by the above-mentioned surface water ratio, and then the mass of the primary water described above from the amount of water determined by the indication composition, the first The surface water mass of the aggregate and the surface water mass of the third aggregate are subtracted to obtain the secondary water mass.

  In other words, the mass of the secondary water is calculated so that the surface water of the first to third aggregates as well as the water supplied first is not included.

  When the surface water ratio obtained by the water immersion measurement is applied to the third aggregate in this way, the third aggregate is stored in the same environment as the second aggregate, and the surface water ratio is Since the third aggregate occupies a large ratio per batch, it is possible to measure the amount of water per batch with high accuracy.

  On the other hand, the surface water rate of the first aggregate is unknown, but the amount of aggregate left on the aggregate conveyor belt conveyor is about 1/10 of the amount of aggregate per batch. It is. Therefore, when the surface water ratio of the aggregate in the aggregate storage means, that is, the surface water ratio obtained by water immersion measurement is applied to the first aggregate, even if the difference between the two is ± 2%, The error reflected in the amount of water per batch is ± 0.2%, which is an allowable error range in actual construction. Therefore, when the surface water correction of the first aggregate is performed, no problem occurs even if the surface water ratio obtained by the water immersion measurement is applied. Of course, it does not prevent empirically applying a value different from the surface water ratio obtained by the water immersion measurement while taking into account the weather conditions at that time.

  The gist of the present invention is that the amount of water per batch is obtained when the surface water ratio obtained as a result of immersion measurement using the aggregate left on the aggregate conveyor belt conveyor is applied to the remaining aggregate. In order to solve the big influence, the aggregate used for water immersion measurement is to use the aggregate in the aggregate storage means such as the aggregate storage bin and the aggregate storage place. Even if an error occurs when the surface water ratio is applied to the first aggregate, it is added that the error is slight as described above and does not cause any problem.

  Once the mass of the third aggregate to be weighed (the mass of the third aggregate in the surface dry state + the mass of the surface water of the aggregate) and the mass of the secondary water are calculated, Operate and swing the loading direction guide plate again to close the water-immersed aggregate storage space, and transport aggregates stored in aggregate storage means such as stock bins and aggregate storage in this state It conveys with a belt conveyor, throws in from the opening of a box body, and measures a 3rd aggregate with a 1st mass measurement means.

  In this case as well, after the third aggregate is thrown from the throwing opening of the box body, it collides with the throwing direction guide plate or is thrown directly into the wet aggregate containing space, so that the water-immersed aggregate is contained. It is not thrown into space.

  When the aggregate is accurately weighed in the measuring tank in this way, the bottom cover for water immersion and the bottom cover for wetting of the measuring tank are opened, and the first bone is opened from the bottom openings of the water immersion box body and the wet box body. The material, the water-immersed aggregate (second aggregate + water supplied) and the third aggregate are dropped into the hopper and installed below the hopper through a discharge port formed at the bottom of the hopper. It is placed on a belt conveyor for measuring aggregate transport and transported to the kneading means.

  If the water-immersed aggregate or aggregate cannot be completely dropped freely due to aggregate adhesion or aggregate compaction on the inner surface of the measurement tank, a vibration imparting device such as a vibrator or knocker should be installed in the measurement tank. What is necessary is just to make it attach suitably to the side.

  On the other hand, for the secondary water, water is supplied while being measured by the second mass measuring means so that the water in the water measuring tank becomes the above-mentioned calculated value, and if the calculated mass value is reached, The drainage port formed at the bottom of the measuring tank is opened, and the water stored in the water measuring tank is once transferred to the water receiver, and then the water in the water receiver is transferred to the pressurized container.

  When the weighed water has been transferred to the pressurized container, close the valve communicating with the water receiver and press-fit air with an air compressor etc. from the air supply port provided in the pressurized container. The second water supply port constituting the above is opened, and the water in the pressurized container is pumped to the kneading means.

  In this way, the secondary water is directly pumped to the kneading means without going through the measuring aggregate transport belt conveyor, and thus there is absolutely no concern that the secondary water will spill out from the measuring aggregate transport belt conveyor. The amount of water per batch can be adjusted to the indicated formulation with high accuracy.

  Next, in situations where the batch processing is not interrupted and the aggregate is not left on the aggregate conveyor belt conveyor, aggregates such as aggregate storage bins and aggregate storage are used as aggregates for water immersion measurement. Even if the aggregate in the aggregate storage means is not collected, the aggregate on the aggregate conveyor belt conveyor may be used.

  As the measurement procedure, the aggregate corresponding to one batch may be divided into three times and performed in exactly the same manner as described above, but the aggregate corresponding to one batch is divided into two times, and the first half of the aggregate is divided. It is efficient to use for water immersion measurement.

  Specifically, first, the operating means is operated to swing the loading direction guide plate to the side that closes the wet aggregate accommodation space, and then the bone stored in the aggregate storage means such as a stock bin or an aggregate storage place. The material is transported by the aggregate conveyor belt conveyor as the aggregate used for water immersion measurement (the first half of the aggregate), and is loaded from the box opening.

  In this way, after the first half of the aggregate is thrown from the throwing opening of the box body, it collides with the throwing direction guide plate or is directly thrown into the water-immersed aggregate accommodating space, and the wet aggregate accommodating space Will not be thrown into.

  Here, when the first half aggregate is put into the water-immersed aggregate housing space in the water immersion box, water having a known mass is supplied to the water-immersed aggregate housing space in advance. The procedure for supplying water to the material accommodation space is the same as that when the batch process is interrupted, and therefore the description thereof is omitted here.

Next, if the first half of the aggregate is put into a water-immersed aggregate containing space filled with the previously supplied water so as to be in a water-immersed state, the mass of the aggregate and water is set to the first in this state. The total mass M _f of the first half aggregate and water, that is, the water-immersed aggregate is calculated. Further, the water level in the water storage space is measured by a water level meter installed in the water storage space, and the total volume V _f of the first half aggregate and water, that is, the water-immersed aggregate is calculated from the measured value.

In this way, the mass M _{a of the} aggregate in the dry state and the mass M _w of water (primary water) in a state including the surface water of the aggregate are calculated from the formulas (1) and (2). Then, the surface water percentage of the aggregate in the first half is obtained by calculating equations (3) and (4).

  Once the surface water percentage of the aggregate in the first half is measured, the mass of the latter half in the surface dry condition is calculated by subtracting the mass of the first half aggregate in the surface dry condition from the aggregate mass determined by the formula composition. .

  Next, the mass of the surface water is calculated by multiplying the calculated mass of the latter half of the aggregate by the above-mentioned surface water ratio, and then the mass of the primary water and the latter half of the bone are determined from the amount of water determined by the indication composition. The surface water mass of the material is subtracted, and this is taken as the mass of secondary water.

  In other words, the mass of secondary water is calculated so that the surface water of the latter half aggregate is not included as well as the water supplied first.

  In this way, when the surface water ratio obtained by water immersion measurement is applied to the second half aggregate, the second half aggregate was stored in the same environment as the first half aggregate, and the surface water ratio was almost the same. It is possible to think that there is, and it becomes possible to measure the amount of water per batch with high accuracy.

  Once the mass of the second half of the aggregate and the mass of secondary water to be weighed are calculated, first, the operating means is re-operated to swing the loading direction guide plate back to the side that closes the water-immersed aggregate accommodation space. In this state, the aggregate stored in the aggregate storage means such as the stock bin and the aggregate storage site is transported by the aggregate conveyor belt conveyor and is loaded from the opening of the box body. Weigh with mass measuring means.

  In this case as well, the latter half of the aggregate is thrown into the wet direction of the wet aggregate receiving space after hitting the guide direction guide plate or directly after being thrown from the input opening of the box body. Will not be thrown into.

  When the aggregate is accurately weighed in the measuring tank in this way, the bottom cover for water immersion and the bottom cover for wetting of the measuring tank are opened, and the aggregate in the first half from the bottom opening of the submersible box body and the wet box body. (Water-immersed aggregate) and the latter half of the aggregate are dropped into the hopper and placed on a belt conveyor for measuring aggregate transport installed below the hopper through a discharge port formed at the bottom of the hopper, and kneading means Transport to.

  Thereafter, the same processing as when the batch processing is interrupted may be performed.

  Each of the first mass measuring means and the second mass measuring means can be constituted by, for example, a load cell. The second mass measuring means includes not only the case of directly measuring the mass of water but also the case of indirectly measuring the mass of water by once measuring the volume of water and converting it to mass. It is assumed that such volume measurement can be performed by, for example, an ultrasonic sensor or an electrode type liquid level displacement sensor.

  The kneading means includes not only kneading aggregate, water and cement, but also kneading aggregate and water. The kneading means can be constituted by an intermediate mixer or a spraying machine.

  The configuration of the operation means is arbitrary. For example, the swing rod installed horizontally through the box body and attached to the lower edge of the loading direction guide plate, the tip of the swing rod, and the measuring tank main body are connected. It is conceivable to constitute the guide plate air cylinder.

  If comprised in this way, rocking | fluctuation of a making direction guide plate can be freely operated by sending a control signal from the control panel to the air cylinder for guide plates. Instead of the guide plate air cylinder, a hand lever may be attached to the rocking rod so that the worker manually rocks the loading direction guide plate as the aggregate is loaded. In this case, the swing rod and the hand lever are the operating means.

  How the water level gauge is installed in the water storage space is arbitrary, but in the water immersion box body, a maintenance opening is provided so as to communicate with the water storage space, and the maintenance opening is closed tightly. It can be considered that a plate is detachably attached and the water level gauge is attached to the back side of the closing plate. Further, as a specific example of connecting the water storage space to the first water supply port provided in the pressurized container, a water injection pipe or a water supply hose connected to the first water supply port is attached to the closing plate. A configuration for connecting to a water inlet is conceivable.

  The configuration of the hopper is arbitrary, but the bottom portion of the hopper is inclined according to the conveying inclination angle of the belt conveyor for measuring aggregate conveying, and a rectangular discharge port having the inclined direction as a longitudinal direction is formed at the bottom portion. The width of the short direction is set to be equal to or less than the width of the conveyor belt for measuring aggregate transport, and the pair of elastic elastic members whose lower edges slide on the belt surface of the conveyor belt for measuring aggregate transport in the rectangular discharge port When the hopper is attached to the gantry so as to hang along each longitudinal edge and the water immersion box body is positioned on the inclined upward side of the hopper, the first aggregate whose measurement is finished The water-immersed aggregate (second aggregate + water supplied) and the third aggregate can be reliably transported to the kneading means on the measurement aggregate transport belt conveyor.

  That is, since the bottom of the hopper is inclined according to the conveyance inclination angle of the measurement aggregate conveyance belt conveyor, the measurement aggregate conveyance belt conveyor is installed below the hopper of the measurement apparatus according to the present invention. In this case, a belt conveyor for transporting the measured aggregate is installed in accordance with the inclined hopper.

  In addition, since the width in the short direction at the rectangular discharge port is set to be equal to or less than the width of the belt conveyor for measuring aggregate transport, each of the above-mentioned aggregates is measured during the dropping operation to the belt conveyor for measuring aggregate transport. There is no fear of spilling from both sides of the aggregate conveyor belt conveyor, and a pair of elastic bands whose lower edges slide on the belt surface of the aggregate conveyor belt conveyor are attached to each longitudinal edge of the rectangular discharge port. Since it hangs down, it can prevent more reliably that it spills from the belt conveyor for conveyance of a measurement aggregate.

  In addition, since the hopper is attached to the gantry so that the water immersion box body is located on the inclined upward side of the hopper, the first aggregate and the third aggregate are the aggregated aggregate transport belts. The water-immersed aggregate is dropped to the upstream side on the downstream side of the conveyor. Therefore, the delay control for delaying the opening operation of the bottom cover for water immersion with respect to the opening operation of the bottom cover for wetting is performed on the control panel while considering the transport speed of the belt conveyor for transporting the measured aggregate. The water-immersed aggregate can be dropped so as to overlap the aggregate and the third aggregate, and the primary water in the water-immersed aggregate penetrates into the first and third aggregates, and the primary water. It is possible to avoid the outflow from the belt conveyor for measuring the aggregate and the adhesion to the belt.

  If the bottom cover for wetting is constituted by a pair of double-opening lids and the central axis of opening and closing is parallel to the longitudinal direction of the rectangular discharge port, the first aggregate and the first aggregate The aggregate 3 is discharged from a rectangular discharge port formed at the bottom of the hopper so as to slide down the inner surface of the hopper, and is dispersed in the longitudinal direction of the rectangular discharge port and is placed below the measurement bone Drops onto the material conveyor belt conveyor.

  Therefore, the first aggregate and the third aggregate are not placed in one place on the measurement aggregate conveyance belt conveyor, and are extended in the conveyance direction of the measurement aggregate conveyance belt conveyor. In this case as well, it is possible to prevent spilling from both sides of the belt conveyor for measuring aggregate transport.

  In addition, if a transport aggregate height adjustment plate for controlling the height of the aggregate placed on the measurement aggregate transport belt conveyor is attached to the uphill side of the hopper so as to be adjustable in height, When the material is carried out of the weighing device by the belt conveyor for measuring aggregate transport, the placement height is limited by the transport aggregate height adjusting plate.

  Therefore, by attaching the transport aggregate height adjustment plate to an appropriate height, it is possible to adjust the aggregate placement height during transport by the measured aggregate transport belt conveyor to the desired height. The aggregate can be prevented from spilling from the belt conveyor for measuring aggregate transport.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of an aggregate and water metering device and a cement-based fluidized material spraying system using the same according to the present invention will be described below with reference to the accompanying drawings. Note that components that are substantially the same as those of the prior art are assigned the same reference numerals, and descriptions thereof are omitted.

(First embodiment)

  1 to 4 are side views showing an aggregate and water metering device according to the present embodiment. As can be seen from these drawings, the measuring device 1 according to the present embodiment is a measuring tank that is suspended at three points from the gantry 3 via three aggregate measuring load cells 2 that are first mass measuring means. 4, the water measuring tank 6 supported by the frame 3 via the water measuring load cell 5 as the second mass measuring means, and the frame 3 at a position below the drain outlet formed at the bottom of the water measuring tank. A water receiver 7 attached to the base 3, a pressurized container 9 attached to the base 3 and connected to the bottom of the water receiver 7 via a valve 8, and attached to the base 3 at a position below the measuring tank 4. A hopper 10 is provided, and a jack base 71 whose height is adjustable is attached to the legs of the gantry 3.

  As can be clearly seen from the perspective view of FIG. 5, the measuring tank 4 comprises a measuring tank body 57 by connecting a water immersion box body 52 and a wetting box body 53 in a bifurcated manner below the box body 51. The bottom opening of the water immersion box body 52 can be watertightly closed by the water immersion bottom lid 54 via the water immersion air cylinder 11a and the water immersion link member 11b (FIGS. 1 and 2). In addition, the bottom opening of the wetting box body 53 is configured so that the wetting bottom lid 55 can be closed via the wetting air cylinder 12a and the wetting link member 12b (FIGS. 1 and 4). .

  Here, an air injection nozzle 69 is provided on the link member side of the water immersion bottom cover 54, and the aggregate adhered to the inner surface of the water immersion bottom cover by injecting high pressure air from the air injection nozzle. And the aggregate is sandwiched between the water immersion box body 52 and water tightness is prevented from being lowered.

  As can be clearly seen in FIG. 1, the water immersion link member 11b includes a connection protrusion projecting from the side surface of the water immersion box body 52, a link material having both ends pin-connected to the water immersion air cylinder 11a, and the link. It consists of an L-shaped support member that extends from substantially the center of the material and is fixed to the lower surface of the water immersion bottom lid 54, and is used for water immersion with the above-mentioned connecting projections as the rod extends and contracts in the water immersion air cylinder 11a. The bottom lid 54 can be rotated.

  On the other hand, as shown in FIGS. 4 and 5, the wetting link member 12b is composed of an inverted Y-shaped link member in which four link members are pin-joined. One lower end is fixed to each of rotating rods 70 and 70 attached to a pair of double-opening lids 55a and 55a constituting the bottom lid 55 for wetting. Since the rotating rods 70 are inserted into the holes of the bracket projecting on the side surface of the wetting box body 53 so as to be rotatable around the material axis, the rods of the wetting air cylinder 12a are expanded and contracted. The lid bodies 55a and 55a can be rotated around the material axes of the rotating rods 70 and 70.

  An aggregate input opening 56 is formed at the top of the box body 51, and from the transported material transported from the aggregate transport belt conveyor 14 supported by the support base 13 erected on the top of the gantry 3. After removing foreign matters such as wood pieces, clay lumps and gravel with the sieve 16, the remaining aggregate can be put into the measuring tank main body 57 through the feeding opening 56. Here, the sieve 16 is provided at the inlet of the aggregate chute 15 provided on the gantry 3. In addition, it is desirable that a vibrator for vibration (not shown) is installed on the sieve 16 so that the wet aggregate does not stay, and the inclination angle is about 40 degrees from the horizontal plane.

  As described above, the measuring tank main body 57 has the water immersion box body 52 and the wetting box body 53 connected to the lower side of the box body 51 in a bifurcated manner, and the internal space 58 of the box body 51 has water. It is configured to communicate with a water-immersed aggregate housing space 59 formed inside the immersion box body 52 and a wet aggregate housing space 60 formed inside the wetting box body 53.

  In the water immersion box body 52, a water storage space 62 is formed using a partition plate 61 that is bent so that the aggregate in the water immersion aggregate storage space 59 does not substantially enter. By providing a gap between the lower edge of the plate and the bottom cover 54 for water immersion, the water storage space 62 is communicated with the water immersion aggregate storage space 59. The water storage space 62 includes a water level gauge (magnetostrictive displacement). 63) is installed.

  Here, the water immersion box body 52 is provided with a maintenance opening 67 so as to communicate with the water accommodation space 62 and a releasable attachment of a closing plate 68 that closes the maintenance opening in a watertight manner. While attaching the water level meter 63 mentioned above, the water supply port (not shown) is provided in the closing board 68, and this water supply port is connected to the 1st water supply port 21 provided in the pressurized container 9 via the water injection pipe or the water injection hose. Connected.

  On the other hand, the pressurized container 9 is provided with an air supply port 22 connected to an air compressor (not shown) via a valve 24 and an air chamber 23, and by pressurizing air into the air supply port, The water in the pressurized container 9 can be pumped to the water accommodation space 62 via the first water feed port 21.

  Further, the pressurized container 9 is provided with a second water supply port as a secondary water supply port 25, and an intermediate mixer or spraying machine as a kneading means through the secondary water supply port. Can be pumped.

  On the other hand, in the box body 51, a loading direction guide plate 64 for selectively loading the aggregate loaded from the loading opening 56 into the water-immersed aggregate housing space 59 or the wet aggregate housing space 60 is provided at the lower edge. The weighing tank main body 57 is provided with operating means for swinging the loading direction guide plate 64 within the box body 51 and arranged so as to swing around the horizontal axis.

  That is, a swing rod 65 attached to the lower edge of the loading direction guide plate 64 is horizontally installed in the box body 51, and the tip of the swing rod is interposed through the guide plate air cylinder 66. The swing rod 65 and the guide plate air cylinder 66 are connected to the measuring tank main body 57 and constitute an operating means for swinging the closing direction guide plate 64. The swing rod 65 is preferably provided immediately above the branch point of the measuring tank body 57 having a bifurcated branch shape.

  Like the other air cylinders, the guide plate air cylinder 66 is connected to the air chamber 23 via a pressure feed pipe (not shown), and is adapted to expand and contract by the pressure feed air from the air chamber. .

  The water metering tank 6 is configured such that a submersible pump (not shown), which is a predetermined water supply means, is installed in, for example, a water tank, and the mass of stored water supplied through the submersible pump can be measured by the water metering load cell 5. It has become.

  The hopper 10 receives the aggregate and water discharged from the bottom openings of the water immersion box body 52 and the wetting box body 53 and drops them.

  As can be seen well in FIG. 1, the bottom of the hopper 10 is formed inclining in accordance with the conveying inclination angle of the belt conveyor for measuring aggregate, and the gantry 3 is positioned so that the water immersion box body 52 is positioned on the inclined upward side of the hopper. As shown in FIG. 3, a rectangular discharge port 17 having an inclined direction as a longitudinal direction is formed in the bottom portion, and the width in the short direction is set to be equal to or less than the width of the belt conveyor for the measurement aggregate. It is.

  Further, as shown in FIGS. 1 and 2, a pair of belt-like elastic members 18, 18 are vertically suspended along the respective longitudinal edges of the rectangular discharge port 17 formed at the bottom of the hopper 10. These lower edges slide on the belt surface of the belt conveyor for measuring aggregate.

  Here, as described above, the wetting bottom lid 55 is constituted by a pair of double-opening lid bodies 55a, 55a. However, the central axis of opening and closing, that is, the material axis of the rotating rod 70 is the rectangular discharge port 17. It is comprised so that it may become parallel to the longitudinal direction.

  Further, as can be seen in FIG. 2, a conveying aggregate height adjusting plate 19 in which a long hole 20 is drilled is attached on the inclined upward side of the hopper 10, and the insertion position of the bolt into the long hole 20 is changed. Thus, the swell of the aggregate placed on the belt conveyor for the measured aggregate is limited by the lower edge of the transport aggregate height adjusting plate 19, and as a result, the aggregate height can be adjusted.

  In order to measure aggregate and water using the aggregate and water measuring device 1 according to the present embodiment, aggregate stored in an aggregate storage means such as a stock bin or an aggregate storage place, particularly fine aggregate. A certain sand is conveyed by the aggregate conveyor belt conveyor 14, and the aggregate is introduced into the measuring tank main body 57 through the introduction opening 56 formed at the top of the box body 51, and is sent by pressure from the pressurized container 9. In this embodiment, assuming that the batch process is interrupted, the aggregate corresponding to one batch is added in three batches.

  In this embodiment, as an example, the aggregate and water for kneading the sprayed mortar are weighed, and the following explanation will be made assuming that 200 kg of sand and 27 kg of water per batch determined by the indicated composition are used. To do.

  First, the first input is defined as the aggregate on the aggregate conveyor belt conveyor (hereinafter referred to as the first aggregate) that has been placed at the end of the previous measurement. In the first loading, the loading direction guide plate 64 is set so that the first aggregate loaded from the loading opening 56 is selectively loaded into the wet aggregate housing space 60 in the wet box body 53. The lower edge of the box body 51 is previously swung around the horizontal axis. The insertion direction guide plate 64 swings to close the water-immersed aggregate accommodation space 59 by operating the control panel 26 and driving the guide plate air cylinder 66.

  In this case, the first aggregate that has been dried on the aggregate conveyor belt conveyor due to the interruption of the batch process and has a reduced surface water ratio is introduced from the introduction opening 56 of the box body 51, and then the introduction direction. It hits the guide plate 64 or directly into the wet aggregate accommodation space 60 and does not enter the water-immersed aggregate accommodation space 59.

  Next, the mass of the first aggregate put into the wet aggregate accommodation space 60 in this state is measured using the aggregate measurement load cell 2. The target value of the weighing is 50 kg as a target value in consideration of the situation where it remains on the aggregate conveyor belt conveyor.

  When the weighing of the first aggregate 50 kg is completed, the guide plate air cylinder 66 is then driven to swing the insertion direction guide plate 64 in the opposite direction to the side closing the wet aggregate accommodation space 60.

  Next, in this state, the aggregate (second aggregate) that is stored in the aggregate storage means such as a stock bin or an aggregate storage place and used for water immersion measurement is used as an aggregate conveyor belt conveyor. And is fed from the loading opening 56 of the box body 51.

  In this way, the second aggregate, like the first aggregate, hits the insertion direction guide plate 64 or is directly input into the water-immersed aggregate storage space 52, and the wet aggregate storage space. 60 is never thrown. The target value for the second aggregate is 10 kg.

  Here, when the second aggregate is put into the water-immersed aggregate accommodation space 59 in the water immersion box body 52, water having a known mass is supplied to the water-immersed aggregate accommodation space in advance.

  The procedure for supplying water to the water-immersed aggregate accommodation space 59 is as follows.

First, a submersible pump (not shown) is driven to supply water to the water measuring tank 6, and the water supply amount M _I is measured using the water measuring load cell 5. The target value is 6 kg.

  When the measurement of water is finished, the drainage port formed at the bottom of the water metering tank 6 is opened, and the water stored in the water metering tank is once transferred to the water receiver 7.

  Next, the air release valve 72 provided in the pressurized container 9 is opened to evacuate the air in the pressurized container, and then the valve 8 is opened to transfer the water in the water receiver 7 to the pressurized container 9.

  When the metered water has been transferred to the pressurized container 9, the air vent valve 72 and the valve 8 are closed and air is injected from the air compressor through the air supply port 22 and the air chamber 23, and then the pressurized container 9 The three-way valve 73 provided at the bottom of the container is opened to the first water supply port 21 side, and the water in the pressurized container 9 is pumped to the water storage space 62 communicating with the water-immersed aggregate storage space 59.

  In this way, the pumped water is filled at the same water level not only in the water accommodation space 62 but also in the water-immersed aggregate accommodation space 59 communicating therewith.

Next, if the above-described second aggregate is put into a water-immersed aggregate accommodation space 59 filled with the previously supplied water so as to be in a water-immersed state, the second aggregate in the measuring tank 4 is put in such a state. The mass of the aggregate 1 and the water-immersed aggregate (second aggregate + water supplied) is measured by the aggregate measuring load cell 2, and the mass of the first aggregate is subtracted from the measured value. Calculate the total mass M _{f of the} aggregate. In addition, the water level of the water storage space is measured by a water level meter 63 installed in the water storage space 62, and the total volume V _f of the water-immersed aggregate is calculated from the measured value.

In this way, the mass M _a of the second aggregate in the surface dry state and the mass M _w of water (primary water) in a state including the surface water of the aggregate can be calculated from the following equation. .
M _a + M _w = M _f (1)
M _a / ρ _a + M _w / ρ _w = V _f (2)

Here, ρ _a is the density of the second aggregate in the surface dry state, and ρ _w is the density of water.

Incidentally, the amount of air in the water-immersed aggregate as a (%), in place of the V _f, the joint use of such a _{· V f (1-a /} 100), a higher precision taking into account the amount of air Weighing is possible.

Next, the total mass M _f and the water supply amount M _I are substituted into the following equation to obtain the mass M _aw of the aggregate in the wet state.
M _aw = M _f −M _I (3)

Next, the surface water ratio of the second aggregate is obtained by substituting M _aw into the following equation.
(M _aw -M _a ) / M _a (4)

  If the surface water ratio of the second aggregate is measured, the surface water ratio is applied to the first aggregate to obtain the mass of the first aggregate in the surface dry state, and then the surface water ratio in the surface dry state is determined. 1. Calculate the mass of the third aggregate in the surface dry state by subtracting the mass of the second aggregate from the aggregate mass determined by the formula composition, that is, 200 kg.

  Next, by multiplying the calculated mass of the third aggregate by the above-mentioned surface water ratio, the mass of the surface water is obtained, and from the mass of the first aggregate measured using the surface water ratio The surface water mass of the first aggregate is obtained, and then the mass of the primary water, the surface water mass of the first aggregate, and the surface water mass of the third aggregate are determined from the amount of water determined by the formulation. Subtract this to make the mass of secondary water.

  In other words, the mass of the secondary water is calculated so that the surface water of the first, second, and third aggregates as well as the water supplied first is not included.

  When the surface water ratio obtained by the water immersion measurement is applied to the third aggregate in this way, the third aggregate is stored in the same environment as the second aggregate, and the surface water ratio is Since the third aggregate occupies a large ratio per batch, it is possible to measure the amount of water per batch with high accuracy.

  On the other hand, the surface water rate of the first aggregate is unknown, but the amount of aggregate left on the aggregate conveyor belt conveyor is about 1/10 of the amount of aggregate per batch. It is. Therefore, when the surface water ratio of the aggregate in the aggregate storage means, that is, the surface water ratio obtained by water immersion measurement is applied to the first aggregate, even if the difference between the two is ± 2%, The error reflected in the amount of water per batch is ± 0.2%, which is an allowable error range in actual construction. Therefore, when the surface water correction of the first aggregate is performed, there is no problem in applying the surface water ratio obtained by the water immersion measurement. Of course, it does not prevent empirically applying a value different from the surface water ratio obtained by the water immersion measurement while considering the weather conditions at that time.

  Note that the above-described calculation of the surface water ratio may be performed by providing an arithmetic processing unit in the control panel 26 and processing by the arithmetic processing unit.

  If the mass of the third aggregate to be measured (the mass of the third aggregate in the surface dry state + the mass of the surface water of the aggregate) and the mass of the secondary water are calculated, first, the air cylinder for the guide plate 66 is driven again, and the throwing direction guide plate 64 is swung again to close the water-immersed aggregate accommodation space 59, and in this state, the aggregate stored in the aggregate storage means such as a stock bin or an aggregate storage place. Is transported by the aggregate conveyor belt conveyor and is input from the input opening 56 of the box body 51, and the calculated amount of the third aggregate is measured by the aggregate measuring load cell 2.

  Note that the third aggregate is thrown from the throwing opening 56 of the box body 51 and then hits the throwing direction guide plate 64 or directly into the wet aggregate containing space 60, so that the water-immersed aggregate is filled. It is not thrown into the accommodation space 59.

  When the aggregate is accurately weighed in the measuring tank 4 as described above, the bottom part of the water immersion box body 52 and the wetting box body 53 is opened by opening the water immersion bottom cover 54 and the wet bottom cover 55 of the measurement tank 4. The first aggregate, the water-immersed aggregate (second aggregate + water supplied) and the third aggregate are dropped into the hopper 10 from the opening, and the discharge port 17 formed at the bottom of the hopper. Is placed on a measuring aggregate conveying belt conveyor installed below the hopper 10 and conveyed to a kneading means such as an intermediate mixer or a spraying machine.

  If the water-immersed aggregate or aggregate cannot be completely dropped freely due to aggregate adherence to the inner surface of the measuring tank 4 or compaction of the aggregate, a vibration imparting device such as a vibrator or knocker should be connected to the measuring tank. What is necessary is just to make it attach suitably to the side.

  On the other hand, with respect to the secondary water, water is supplied while being measured in the water measuring load cell 5 so that the water in the water measuring tank 6 has the calculated mass, and if the calculated mass value is reached, The drainage port formed at the bottom of the measuring tank 6 is opened, and the water stored in the water measuring tank is once transferred to the water receiver 7, and then the water in the water receiver 7 is the same as in the case of primary water. Then, the pressure is transferred to the pressurized container 9 and air is injected from the air supply port 22 by an air compressor. Next, the second water supply port 25 side of the three-way valve 73 is opened, and the water in the pressurized container 9 is drained. It is pumped to a kneading means such as an intermediate mixer or sprayer.

  As described above, according to the aggregate and water metering device according to the present embodiment, the guide plate air cylinder 66 and the swing rod 65 which are operation means are used to swing the closing direction guide plate 64. The aggregate can be selectively introduced into either the wet aggregate housing space 60 or the water-immersed aggregate housing space 59, and the water immersion metering can be performed at an intermediate point of one batch of metering.

  Further, according to the aggregate and water metering device according to the present embodiment, secondary water can be directly pumped to a kneading means such as an intermediate mixer or a spraying machine without going through a belt conveyor for metered aggregate transport. Thus, there is no concern that secondary water spills from the measured aggregate transport belt conveyor or adheres to the belt, and thus the amount of water per batch can be adjusted to the indicated composition with high accuracy. In addition, since water does not adhere to the belt conveyor for measuring aggregate transport, the belt conveyor is less contaminated, and there is an effect that the maintenance inspection becomes easy.

  Further, according to the aggregate and water measuring device according to the present embodiment, the first aggregate, the water-immersed aggregate (second aggregate + water supplied), and the third aggregate that have been weighed. Can be reliably transported to a kneading means such as an intermediate mixer or a spraying machine on the belt conveyor for transporting the measured aggregate.

  That is, since the bottom of the hopper 10 is inclined according to the conveyance inclination angle of the measurement aggregate conveyance belt conveyor, the measurement aggregate conveyance belt conveyor of the hopper 10 of the measurement apparatus 1 according to the present embodiment is used. When installing below, it installs according to the hopper 10 formed inclining.

  Since the width in the short direction of the rectangular discharge port 17 is set to be equal to or less than the width of the belt conveyor for measuring aggregate transport, each aggregate described above is transported to the aggregate aggregate when dropping onto the belt conveyor. There is no risk of spilling from both sides of the belt conveyor, and a pair of elastic elastic members 18 and 18 whose lower edges slide on the belt surface of the belt conveyor for conveying the measured aggregate are arranged in the longitudinal edges of the rectangular discharge ports 17. Therefore, it is possible to more reliably prevent spilling from the belt conveyor for conveying the measured aggregate.

  In addition, since the hopper 10 is attached to the gantry 3 so that the water immersion box body 52 is located on the inclined upward side of the hopper, the first aggregate and the third aggregate are the measured aggregate transport belts. The water-immersed aggregate is dropped on the downstream side of the conveyor, and the water-immersed aggregate can be dropped on the first and third aggregates in consideration of the transport speed. For example, the primary water in the water-immersed aggregate can permeate the first and third aggregates, and the primary water can be prevented from flowing out from the measured aggregate transport belt conveyor.

  In addition, since the wetting bottom lid 55 is constituted by a pair of double-opening lid bodies 55a, 55a and the central axis of opening and closing is parallel to the longitudinal direction of the rectangular discharge port 17, the first aggregate The third aggregate is discharged from a rectangular discharge port 17 formed at the bottom so as to slide down the inner surface of the hopper 10, and is dispersed in the longitudinal direction of the rectangular discharge port and installed below the discharge port. It falls to the conveyor belt for measuring aggregate transport.

  Therefore, the first aggregate and the third aggregate are not placed in one place on the measurement aggregate conveyance belt conveyor, and are extended in the conveyance direction of the measurement aggregate conveyance belt conveyor. In this case as well, it is possible to prevent spilling from both sides of the belt conveyor for measuring aggregate transport.

  In addition, since the transport aggregate height adjusting plate 19 is attached to the uphill side of the hopper 10 so that the height can be adjusted, when each aggregate is carried out by the belt conveyor for transporting the measured aggregate, its mounting height is It will be limited by the transport aggregate height adjustment plate 19.

  Therefore, by attaching the transport aggregate height adjustment plate 19 to an appropriate height, it is possible to adjust the aggregate placement height during transport by the measured aggregate transport belt conveyor to a desired height. Thus, the aggregate can be prevented from spilling from the belt conveyor.

  In this embodiment, it demonstrated on the assumption that the aggregate (1st aggregate) on the belt conveyor for aggregate conveyance was dried by interruption of batch processing. However, the reason why such aggregate is not suitable as an aggregate for water immersion measurement is because the environment is different from the aggregate stored in the aggregate storage means such as a storage bin, and the cause of the difference in the aggregate environment. As well as drying, conversely, when exposed to rainfall outdoors, we can assume that the surface water rate is higher than the aggregate in the aggregate storage means, and also for water immersion measurement It is not preferable as an aggregate. The present invention naturally includes such a situation.

  Further, in the present embodiment, the description has been made on the assumption that the aggregate is a fine aggregate and the material of the sprayed mortar, but the present invention is not limited to such a content, and as a concrete material Needless to say, the present invention can also be applied to the measurement of coarse aggregates. In addition, the present invention is not based on the premise that the measured coarse aggregate or fine aggregate is used for sprayed mortar or shotcrete, and the total amount of aggregate cannot be measured by the water immersion aggregate method. In such a case, the present invention can be applied to all of them.

  Although not particularly mentioned in the present embodiment, when the scale of the apparatus is increased, it is conceivable to use a hydraulic actuator instead of the air cylinder.

  In the present embodiment, the method of using the weighing device 1 is described assuming that the batch process is interrupted and the aggregate is left on the aggregate conveyor belt conveyor 14. However, the batch process is not interrupted. In the situation where the aggregate is not left on the aggregate conveyor belt conveyor 14, the aggregate in the aggregate storage means such as the aggregate storage bin or the aggregate storage is collected as the aggregate for water immersion measurement. Alternatively, the aggregate on the aggregate conveyor belt conveyor 14 may be used.

  As the measurement procedure, the aggregate corresponding to one batch may be divided into three times and performed in exactly the same manner as described above.

  That is, as in the above-described embodiment, first, the first input is set as the aggregate on the aggregate conveyor belt conveyor (hereinafter referred to as the first 'aggregate). Since the charging method is the same as that in the above-described embodiment, it is omitted. However, in this modification, since the batch processing is continuously performed, the aggregate conveyor belt conveyor 14 performs batch processing and batch processing. Even if it stops for several minutes, it does not stop for a long time of several hours to half a day. Therefore, unlike the above-described embodiment, it can be said that the first aggregate has no substantial difference in the surface water ratio from the aggregate in the aggregate storage means.

  Next, the mass of the first 'aggregate is measured using the aggregate measuring load cell 2 in the same manner as in the above-described embodiment, and then, the loading direction guide plate 64 is placed on the side closing the wet aggregate accommodation space 60. After swinging in the opposite direction, the aggregate (second 'aggregate) used for water immersion measurement is transported by the aggregate transport belt conveyor, and is loaded from the loading opening 56 of the box body 51. Note that water having a known mass is supplied to the water-immersed aggregate accommodation space 59 in advance, as in the above-described embodiment. Since the procedure for supplying water to the water-immersed aggregate accommodation space 59 is the same as that in the above-described embodiment, the description thereof is omitted here.

Next, if the above-mentioned 2 ′ aggregate is put into a water-immersed aggregate housing space 59 filled with the previously supplied water so as to be in a water-immersed state, The mass of the 1 'aggregate and the water-immersed aggregate (2' aggregate + water supplied) is measured by the aggregate measuring load cell 2, and the mass of the 1 'aggregate from the measured value. Is subtracted to calculate the total mass M _f of the water-immersed aggregate. In addition, the water level of the water storage space is measured by a water level meter 63 installed in the water storage space 62, and the total volume V _f of the water-immersed aggregate is calculated from the measured value. Then, the surface water ratio of the second ′ aggregate is calculated in the same manner as in the above embodiment.

  Once the surface moisture content of the 2 'aggregate has been measured, the surface moisture percentage is applied to the 1' aggregate to determine the mass of the 1 'aggregate in the surface dry state, The mass of the 1 'and 2' aggregates in the state is subtracted from the aggregate mass determined by the formula, that is, 200 kg, to calculate the mass of the 3 'aggregate in the surface dry state.

  Next, the mass of the surface water is obtained by multiplying the calculated mass of the third 'aggregate by the above-mentioned surface water ratio, and the measured first 1' aggregate is measured using the surface water ratio. The surface water mass of the first 'aggregate is obtained from the mass, and then the primary water mass, the surface water mass of the first' aggregate and the 3 'aggregate are determined from the amount of water determined by the formulation. Is subtracted from the surface water mass, and this is taken as the mass of secondary water.

  In other words, the mass of the secondary water is calculated so that the surface water of the first, second, and third ′ aggregates as well as the first supplied water is not included.

  In this way, when the surface water ratio obtained by water immersion metering was applied to the 1 'aggregate and the 3' aggregate, these aggregates were stored in the same environment as the 2 'aggregate. And the surface water content can be considered to be substantially the same, and the ratio of the 1 'aggregate and the 3' aggregate per batch is large. It becomes possible to measure the amount of water per batch with high accuracy.

  After calculating the mass of the third aggregate (the mass of the third aggregate in the surface dry state + the mass of the surface water of the aggregate) and the mass of the secondary water, the same processing as in the above embodiment is performed. Good.

  On the other hand, if the batch processing is continuous, it is efficient to divide the aggregate corresponding to one batch in two and use the first half aggregate for water immersion measurement.

  Specifically, first, by operating the control panel 26 to drive the air cylinder 66 for the guide plate, the loading direction guide plate 64 is swung to the side closing the wet aggregate accommodation space 60, and then the stock bin. Aggregate stored in an aggregate storage means such as an aggregate storage site is transported by an aggregate conveyor belt conveyor 14 as an aggregate used for water immersion measurement (an aggregate in the first half), and an input opening of a box body 51 Input from 56.

  In this way, the first half of the aggregate is thrown from the throw opening 56 of the box body 51, and then collides with the throw direction guide plate 64 or directly into the water-immersed aggregate accommodation space 59. It is not thrown into the aggregate accommodation space 60.

  Here, when the aggregate of the first half is put into the water-immersed aggregate housing space 59 in the water immersion box body 52, water having a known mass is supplied to the water-immersed aggregate housing space in advance. The procedure for supplying water to the water-immersed aggregate accommodation space 59 is the same as that in the case where the batch process is interrupted, and therefore the description thereof is omitted here.

Next, when the first half of the aggregate is put into a water-immersed aggregate accommodation space filled with the previously supplied water so as to be in a water-immersed state, the mass of the aggregate and water is loaded in the load cell 2 in this state. The total mass M _f of the first half aggregate and water, that is, the water-immersed aggregate is calculated. Further, the water level in the water storage space is measured by a water level meter installed in the water storage space, and the total volume V _f of the first half aggregate and water, that is, the water-immersed aggregate is calculated from the measured value.

In this way, the mass M _{a of the} aggregate in the dry state and the mass M _w of water (primary water) in a state including the surface water of the aggregate are calculated from the formulas (1) and (2). Then, the surface water percentage of the aggregate in the first half is obtained by calculating equations (3) and (4).

  If the surface water percentage of the first-half aggregate is measured, the mass of the second-half aggregate in the surface dry state is calculated by subtracting the mass of the first-half aggregate in the surface-dry state from the aggregate mass determined by the combination formula. .

  Next, the mass of the surface water is calculated by multiplying the calculated mass of the latter half of the aggregate by the above-mentioned surface water ratio, and then the mass of the primary water and the latter half of the bone are determined from the amount of water determined by the indication composition. The surface water mass of the material is subtracted, and this is taken as the mass of secondary water.

  In other words, the mass of the secondary water is calculated so that the surface water of the first and second half aggregates as well as the water supplied first is not included.

  In this way, when the surface water ratio obtained by water immersion measurement is applied to the second half aggregate, the second half aggregate was stored in the same environment as the first half aggregate, and the surface water ratio was almost the same. Since there is no problem, it is possible to measure the amount of water per batch with high accuracy.

  If the mass of the second half of the aggregate to be weighed and the mass of the secondary water are calculated, first, the guide plate air cylinder 66 is re-driven so that the insertion direction guide plate 64 is closed to the side where the submerged aggregate accommodation space 59 is closed. While swinging in reverse, the aggregate stored in the aggregate storage means such as a stock bin or an aggregate storage place is conveyed by the aggregate conveyor belt conveyor 14 and is input from the input opening 56 of the box body 51. The second half of the calculated amount of aggregate is weighed by the load cell 2.

  In addition, after the second half aggregate is thrown from the throw opening 56 of the box body 51, it collides with the throwing direction guide plate 64 or is thrown directly into the wet aggregate accommodating space 60, so that the water-immersed aggregate is accommodated. It is not thrown into the space 59.

  When the aggregate is accurately weighed in the measuring tank 4 as described above, the bottom part of the water immersion box body 52 and the wetting box body 53 is opened by opening the water immersion bottom cover 54 and the wet bottom cover 55 of the measurement tank 4. The first half aggregate (water-immersed aggregate) and the second half aggregate are dropped into the hopper 10 from the opening, and the measurement aggregate installed below the hopper 10 through the discharge port 17 formed at the bottom of the hopper. It is placed on a conveyor belt conveyor and conveyed to a kneading means such as an intermediate mixer or sprayer.

  Thereafter, the same processing as when the batch processing is interrupted may be performed.

  In the present embodiment, the kneading means is assumed to knead aggregate, water, and cement. However, instead of this, the aggregate and water may be kneaded.

(Second Embodiment)

  Next, a second embodiment will be described. Note that components that are substantially the same as those of the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

  FIG. 6 is an overall view showing a spray system for a cement-based fluidized solid material according to the present embodiment. As can be seen from the figure, the cement-based fluidized material spraying system 101 according to the present embodiment includes a weighing device 1, an aggregate hopper 102 as an aggregate storage means, and a discharge opening of the aggregate hopper 102. The conveyance start position is positioned below and the conveyance end position is positioned above the charging opening 56 of the measuring tank main body 57, and the conveyance is started below the aggregate conveyor belt conveyor 14 and the hopper 10 of the weighing device 1. A measuring aggregate conveying belt conveyor 104 arranged to be positioned, and a spraying machine 105 arranged so that the mixer opening is positioned below the conveying end position of the measuring aggregate conveying belt conveyor; The kneading space of the spraying machine 105 is connected to the secondary water feed port 25 provided in the pressurized container 9.

  Since the weighing device 1 constituting this embodiment has already been described in the first embodiment, the description thereof is omitted here.

  In the cement-based fluidized material spraying system 101 according to the present embodiment, first, aggregate and water per batch are weighed by the metering device 1 as described in the first embodiment.

  Next, the weighed aggregate is placed on the weighed aggregate conveying belt conveyor 104 via the hopper 10 of the measuring tank 4 and conveyed to the spraying machine 105, and then the mixer 106 provided in the spraying machine. The mortar for spraying is manufactured by introducing into the charging opening and kneading.

  The cement may be dropped onto the measured aggregate transport belt conveyor 104 and transported together with the aggregate by the measured aggregate transport belt conveyor.

  On the other hand, for the secondary water measured in the water metering tank 6 of the metering device 1, the drainage port formed at the bottom of the water metering tank 6 is opened and the water stored in the water metering tank is temporarily received by the water receiver 7. Then, the water in the water receiver 7 is transferred to the pressurized container 9 in the same procedure as in the case of primary water, and air is injected from the air supply port 22 with an air compressor. Among them, the second water supply port 25 side is opened, and the water in the pressurized container 9 is pumped to the spraying machine 105.

  As explained above, according to the spraying system of the cement-based fluidized solidified material according to the present embodiment, the secondary water is directly pumped to the spraying machine 105 without going through the measured aggregate conveying belt conveyor 104. Therefore, there is no fear of secondary water spilling from the measured aggregate conveying belt conveyor 104, and thus the amount of water per batch can be adjusted to the indicated formulation with high accuracy.

(Third embodiment)

  Next, a third embodiment will be described. Note that components that are substantially the same as those of the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

  FIG. 7 is an overall view showing a spray system for a cement-based fluidized material according to the present embodiment. As can be seen from the figure, the cement-based fluidized material spraying system 120 according to the present embodiment includes a metering device 1, an aggregate hopper 102 serving as an aggregate storage means, and a discharge opening of the aggregate hopper 102. The conveyance start position is positioned below and the conveyance end position is positioned above the charging opening 56 of the measuring tank main body 57, and the conveyance is started below the aggregate conveyor belt conveyor 14 and the hopper 10 of the weighing device 1. A measuring aggregate conveying belt conveyor 104 arranged to be positioned, an intermediate mixer 121 arranged so that an input opening is positioned below a conveying end position of the measuring aggregate conveying belt conveyor, An intermediate conveyor belt conveyor 122 disposed so that a conveyance start position is positioned below a discharge opening of the intermediate mixer, and the intermediate conveyor belt conveyor; And a spraying machine 105 arranged so that the mixer inlet opening is positioned below the conveyance end position of the intermediate water, and the kneading space of the intermediate mixer 121 communicates with the secondary water feed port 25 provided in the pressurized container 9. Connected.

  Since the weighing device 1 constituting this embodiment has already been described in the first embodiment, the description thereof is omitted here.

  In the cement-based fluidized material spraying system 120 according to the present embodiment, first, as described in the first embodiment, aggregate and water per batch are weighed by the metering device 1.

  Next, the weighed aggregate is placed on the weighed aggregate conveying belt conveyor 104 via the hopper 10 of the measuring tank 4 and conveyed to the intermediate mixer 121. The cement may be dropped onto the measured aggregate transport belt conveyor 104 and transported together with the aggregate by the measured aggregate transport belt conveyor.

  On the other hand, for the secondary water measured in the water metering tank 6 of the metering device 1, the drainage port formed at the bottom of the water metering tank 6 is opened and the water stored in the water metering tank is temporarily received by the water receiver 7. Then, the water in the water receiver 7 is transferred to the pressurized container 9 in the same procedure as in the case of primary water, and air is injected from the air supply port 22 with an air compressor. Among them, the second water supply port 25 side is opened, and the water in the pressurized container 9 is pumped to the intermediate mixer 121.

  Next, the material kneaded by the intermediate mixer 121 is transported to the spraying machine 105 by the intermediate transport belt conveyor 122, and then is put into the charging opening of the mixer 106 provided in the spraying machine and kneaded. Produces fresh mortar for spraying.

  As described above, according to the cement-based fluidized / solidified spraying system according to the present embodiment, the secondary water is directly pumped to the intermediate mixer 121 without passing through the measured aggregate transport belt conveyor 104. Therefore, there is no fear of secondary water spilling from the measured aggregate conveying belt conveyor 104, and thus the amount of water per batch can be adjusted to the indicated formulation with high accuracy.

  In this embodiment, the secondary water is pumped from the metering device 1 to the intermediate mixer 121, but may be pumped to the sprayer 105 instead.

  According to such a configuration, there is no fear of secondary water spilling not only from the aggregate conveyor belt conveyor 104 but also from the intermediate conveyor belt conveyor 122, so that the amount of water per batch can be expressed with higher accuracy. It becomes possible to match.

  Although not specifically mentioned in each embodiment, when an admixture is used, the amount of the stock solution or the amount of diluted water is also subtracted from the amount of water determined by the formula formulation to calculate secondary water. You can do it.

The side view of the aggregate and water metering device concerning a 1st embodiment. The arrow line view seen from the AA line direction of FIG. The arrow line view seen from the BB line direction of FIG. The arrow line view seen from the CC line direction of FIG. The perspective view of the measurement tank 4. FIG. The whole figure of the spraying system concerning a 2nd embodiment. The whole figure of the spraying system concerning a 2nd embodiment.

Explanation of symbols

1 Aggregate and water metering device 2 Aggregate load cell (first mass measuring means)
3 stand 4 measuring tank 5 load cell for water measurement (second mass measuring means)
6 Water measuring tank 7 Water receiver 8 Valve 9 Pressurized container 10 Hopper 14 Aggregate transport belt conveyor 17 Rectangular opening 18 Strip elastic material 19 Transport aggregate height adjustment plate 51 Box body 52 Water immersion box body 53 Wet Box body 54 Immersion bottom cover 55 Wetting bottom cover 56 Input opening 57 Measuring tank body 58 Box body internal space 59 Water immersion aggregate storage space 60 Wet aggregate storage space 62 Water storage space 63 Water level gauge 64 Input direction Guide plate 65 Oscillating rod 104 Weighing aggregate conveyor belt conveyor 105 Spraying machine 121 Intermediate mixer 122 Intermediate conveyor belt conveyor

Claims (8)

A water immersion box body and a wetting box body are formed below a box body having an aggregate input opening formed at the top, and a water immersion bone in which an internal space of the box body is formed inside the water immersion box body. A measuring tank body that is connected in a bifurcated manner so as to communicate with a material housing space and a wet aggregate housing space formed inside the wetting box body, and a bottom opening of the water immersion box body A weighing tank configured to close a bottom opening of the wetting box body with a water immersion bottom lid and a wetting bottom lid, and a pedestal for supporting the weighing tank via a first mass measuring means; A water measuring tank supported on the gantry via the second mass measuring means and capable of storing and measuring the water supplied via the predetermined water supplying means, and below the drain outlet formed at the bottom of the water measuring tank A water receiver attached to the gantry at a position, and the gantry A pressure vessel attached and connected to the bottom of the water receiver via a valve, and aggregate and water discharged from the bottom openings attached to the gantry at a position below the measuring tank A water receiving space that is formed in the water immersion box and communicated with the water immersed aggregate housing space so that the aggregate in the water immersed aggregate housing space does not substantially enter. A water level meter is installed and the water storage space is connected to a first water supply port provided in the pressurization vessel, and the inside of the pressurization vessel is supplied by pressurization air from an air supply port provided in the pressurization vessel. The aggregate and water metering device is configured to be capable of pressure-feeding water to the water-accommodating space through the first water-feeding port, wherein the second water-feeding port is connected to the pressurized container. So that the secondary water can be pumped to the kneading means. The loading direction guide plate for selectively loading the aggregate loaded from the loading opening into the water-immersed aggregate housing space or the wet aggregate housing space so as to be able to swing around the horizontal axis at the lower edge thereof. An aggregate and water metering device, wherein the metering tank main body is provided with an operating means for disposing the guide plate in the box body and swinging the loading direction guide plate within the box body. A swinging rod installed horizontally through the box body and attached to the lower edge of the loading direction guide plate, a guide plate air cylinder for connecting the tip of the swinging rod and the measuring tank main body. The aggregate and water metering device according to claim 1 comprising: A maintenance opening is provided in the water immersion box body so as to communicate with the water accommodation space, and a closing plate for watertightly closing the maintenance opening is detachably attached, and the water level gauge is attached to the back side of the closing plate. The aggregate and water measuring device according to claim 1, wherein a water injection pipe or a water injection hose connected to the first water supply port is connected to a water supply port attached to the closing plate. The bottom portion of the hopper is inclined according to the conveying inclination angle of the belt conveyor for conveying the measured aggregate, and the rectangular discharge port having the inclined direction as the longitudinal direction is formed at the bottom portion, and the width in the short direction is measured. A pair of elastic elastic members, which are set to be equal to or smaller than the width of the belt conveyor for conveying material and whose lower edge slides on the belt surface of the belt conveyor for measuring aggregate conveying, are suspended along each longitudinal edge of the rectangular discharge port. The aggregate and water metering device according to claim 1, wherein the hopper is attached to the gantry so that the water immersion box body is positioned on the inclined upward side of the hopper. The aggregate and water metering device according to claim 4, wherein the wetting bottom lid is constituted by a pair of double-opening lids and the central axis of opening and closing is parallel to the longitudinal direction of the rectangular discharge port. . The aggregate and water according to claim 4, wherein a transport aggregate height adjusting plate for controlling the aggregate height placed on the belt conveyor for measuring aggregate transport is attached on the inclined upward side of the hopper so as to be adjustable in height. Weighing equipment. The weighing device according to any one of claims 1 to 6, an aggregate storage means, a transfer start position is positioned below a discharge opening of the aggregate storage means, and a transfer end position is input to the weighing tank main body. An aggregate conveyor belt conveyor arranged to be positioned above the opening, a measurement aggregate conveyor belt conveyor arranged to position a conveyance start position below the hopper, and the aggregate aggregate conveyor An intermediate mixer arranged so that the charging opening is positioned below the conveying end position of the belt conveyor, and an intermediate conveying belt conveyor arranged so that the conveying start position is positioned below the discharge opening of the intermediate mixer; A spraying machine arranged so that a mixer charging opening is positioned below a transfer end position of the intermediate transfer belt conveyor, and kneading empty of the intermediate mixer Spray system cementitious fluid solidifying material, characterized in that communicatively connected to the secondary water for water supply port provided in the pressure vessel a. The weighing device according to any one of claims 1 to 6, an aggregate storage means, a transfer start position is positioned below a discharge opening of the aggregate storage means, and a transfer end position is input to the weighing tank main body. An aggregate conveyor belt conveyor arranged to be positioned above the opening, a measurement aggregate conveyor belt conveyor arranged to position a conveyance start position below the hopper, and the aggregate aggregate conveyor A spraying machine disposed so that the mixer opening is positioned below the belt conveyor transfer end position, and the kneading space of the spraying machine is connected to the secondary water feed port provided in the pressurized container. A cement-based fluidized solidifying material spraying system characterized by being connected in communication.

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