WO2003000478A1 - Equipement de pesage de constituant de beton - Google Patents
Equipement de pesage de constituant de beton Download PDFInfo
- Publication number
- WO2003000478A1 WO2003000478A1 PCT/JP2002/005721 JP0205721W WO03000478A1 WO 2003000478 A1 WO2003000478 A1 WO 2003000478A1 JP 0205721 W JP0205721 W JP 0205721W WO 03000478 A1 WO03000478 A1 WO 03000478A1
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- WO
- WIPO (PCT)
- Prior art keywords
- water
- aggregate
- measuring
- tank
- immersed
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C7/00—Controlling the operation of apparatus for producing mixtures of clay or cement with other substances; Supplying or proportioning the ingredients for mixing clay or cement with other substances; Discharging the mixture
- B28C7/02—Controlling the operation of the mixing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G19/00—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups
- G01G19/22—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for apportioning materials by weighing prior to mixing them
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
- G01F23/24—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of resistance of resistors due to contact with conductor fluid
- G01F23/241—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of resistance of resistors due to contact with conductor fluid for discrete levels
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G13/00—Weighing apparatus with automatic feed or discharge for weighing-out batches of material
- G01G13/02—Means for automatically loading weigh pans or other receptacles, e.g. disposable containers, under control of the weighing mechanism
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G17/00—Apparatus for or methods of weighing material of special form or property
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/38—Concrete; ceramics; glass; bricks
- G01N33/383—Concrete, cement
Definitions
- the present invention relates to a concrete material measuring device for measuring aggregate and water having different surface water conditions.
- the aggregate which is a compounded material, contains water depending on the storage conditions and climatic conditions. The condition is different.
- the amount of water in the concrete increases by the amount of surface water of the aggregate, and when the aggregate in the dry state is used, the amount of water in the concrete decreases by the effective water absorption. Therefore, it is extremely important to maintain the quality of concrete by adjusting the amount of water at the time of mixing according to the degree of dryness and wetness of the aggregate and producing concrete as specified.
- the ratio of the amount of surface water in the wet state (the amount of water adhering to the surface of the fine aggregate) divided by the mass of the fine aggregate in the surface dry state (surface dry saturated state) is called the surface water rate.
- stored aggregates, especially fine aggregates, are often wet, so such surface water content is measured in advance as an indicator of the degree of dryness and wetness of the aggregates, and based on the measured values, It is common to adjust the amount of mixing water.
- such a measurement of the surface water content is performed by collecting a small amount of a sample from a storage container called a stock bin in which fine aggregate is stored, measuring its mass and the mass in a completely dry state, and then, It was calculated using these measured values and the previously measured water absorption in the surface dry state.
- the operator may visually check the mixing status of the beg to compensate for such a problem, or adjust the mixing water amount by referring to the load current of the mixer.
- the brute force method itself was of low accuracy, and in the end it had to be expected to have a large safety factor of nearly 20% in terms of strength, resulting in the problem of uneconomical formulation. Disclosure of the invention
- the present invention has been made in consideration of the above circumstances, and has as its object to provide a concrete material measuring device capable of accurately measuring the mass of aggregate and water.
- the present invention provides a measuring device for a conglomerate material capable of accurately measuring the mass of aggregate and water by using the water immersion aggregate measurement method even for concrete with a small slump and poor mix. It is intended to do so.
- a concrete material measuring apparatus is provided with an aggregate supply unit for supplying aggregate, a water supply unit, and an aggregate supply unit.
- An aggregate weighing bin for storing and measuring the aggregate; an aggregate supplied from the aggregate supply means is accommodated together with water supplied from the water supply means as a water-immersed aggregate, and watertightness is maintained at a bottom opening.
- a measuring tank having a bottom cover capable of being opened and closed freely, a water-immersed aggregate for measuring the mass of the water-immersed aggregate in the measuring tank, and a water level of the water-immersed aggregate in the measuring tank.
- Means for maintaining the water level A water absorption pipe installed in the water absorption pipe connected to the water absorption pipe, and a storage tank for measuring water absorbed by the water absorption pipe, and an intake means connected to the water absorption measurement storage tank.
- the supply means is configured to be able to supply the aggregate to the aggregate measuring bin and the measuring tank, respectively.
- the concrete material measuring device comprises an aggregate supply means for supplying aggregate, a water supply means, and an aggregate supplied from the aggregate supply means.
- a weighing tank containing water supplied from the water supply means as immersed aggregate and a bottom lid capable of maintaining watertightness at the bottom opening is openably and closably attached, and the mass of the immersed aggregate in the weighing tank is measured.
- Water immersion material to be measured Quantity measuring means Water immersion material to be measured Quantity measuring means, water level measuring means for measuring the water level of the water immersed aggregate in the measuring tank, and for maintaining the water level of the water immersed aggregate in the measuring tank at a desired water level
- Water level holding means for absorbing the water above the desired water level into the measuring tank and measuring the amount of water absorbed, and It comprises a water absorption pipe freely installed, a water absorption measurement storage tank connected to the water absorption pipe and measuring the water absorbed, and an intake means connected to the water absorption measurement storage tank.
- a measuring tank for measuring water-immersed aggregate and an aggregate measuring for measuring only the aggregate are provided.
- the aggregate supply means is configured to be able to supply the aggregate to the powerful aggregate measuring bin and the measuring tank, respectively.
- the water level of the water-immersed aggregate in the measuring tank is maintained at a desired water level by appropriately raising and lowering the water absorption pipe in advance.
- the water inlet provided at the lower end of the water absorption pipe is positioned.
- the volume of the immersed aggregate in the measuring tank is maintained at a predetermined volume. Whether or not the water level in the measuring tank is at the desired level should be confirmed separately by the water level measuring means.
- the water absorbed through the water absorption pipe is stored in the water absorption measuring storage tank, and its mass is measured to determine the surface water content of the aggregate.
- the remaining aggregate put into the aggregate weighing bin is weighed as it is as before, but the accurate surface water rate is calculated when weighing as immersed aggregate.
- the surface water rate that is strong it is possible to grasp the surface water with higher accuracy than in the past even for the aggregate weighed as before.
- the water level holding means includes a water absorption pipe installed so as to be able to move up and down and a water absorption measurement storage tank connected to the water absorption pipe and measuring water absorbed. It is constituted by an intake means connected to the storage tank for water absorption measurement.
- a water absorption pipe installed so as to be able to move up and down and a water absorption measurement storage tank connected to the water absorption pipe and measuring water absorbed. It is constituted by an intake means connected to the storage tank for water absorption measurement.
- the water immersion pipe in the measurement tank is raised and lowered appropriately in advance.
- the water inlet provided at the lower end of the water absorption pipe is positioned so that the water level of the aggregate is at a height that maintains the desired water level.
- the water absorbed through the water absorption pipe is stored in the water absorption storage tank, and if its mass is measured, the surface water rate of the aggregate can be accurately determined as described later. it can.
- the aggregate is mainly intended for fine aggregate, but it is needless to say that it can be applied to coarse aggregate.
- aggregates are capable of turning fine aggregates and coarse aggregates, but concrete is composed of fine aggregates and coarse aggregates.
- aggregate and coarse aggregate it is assumed that multiple materials with different densities and different grain sizes are used. In particular, it is often important to mix a plurality of aggregates having different grain sizes at an appropriate ratio to newly produce an aggregate having a desired grain size in the composition of concrete.
- the concrete material measuring device can measure not only a single type of aggregate but also a plurality of aggregates having different densities and / or grain sizes from each other, for example, by a cumulative measuring method.
- a plurality of aggregates includes all cases where fine aggregates are used, all cases where coarse aggregates are used, and all cases where fine aggregates and coarse aggregates are optionally included. It shall be.
- a plurality of aggregates include those having different densities and grain sizes, as well as locality, strength, Young's modulus, durability, natural aggregates, artificial aggregates, by-product aggregates, and natural aggregates. Aggregates are also classified as having different production conditions such as sea sand or mountain sand and other classification indicators for aggregates.
- the measuring tank can be of any shape as long as it can accommodate the water-immersed aggregate.For example, a hollow cylindrical shape does not work, but if it is formed into a hollow truncated cone, it goes downward. The larger the inner diameter Therefore, there is no danger that the immersed aggregate will be clogged in the middle, and when weighing is completed, the immersed aggregate can be easily dropped and removed by simply opening the bottom cover.
- the vibrator can be lowered during or after the introduction of the aggregate.
- the aggregate put into the measuring tank is flattened by the vibration, and there is no possibility that the aggregate comes out on the water surface.
- the volume of the measuring tank is arbitrary and may be the unit for concrete mixing, that is, the total amount required for one batch! , Then, weigh in several times! / ,.
- the water-immersed aggregate mass measuring means can be constituted by, for example, a load cell.
- the force can not be constituted by any means, the force S does not turn, the water level measuring means is constituted by an electrode type sensor, and the electrode type sensor is attached to the water absorption pipe. If the electrode-type sensor is configured to be able to move up and down in conjunction with the water-absorbing pipe by being fixed, a mechanism for raising and lowering the electrode-type sensor can be omitted.
- such an electrode type sensor is disposed in a hollow tube and fixed to the water absorption tube together with the hollow tube, and low pressure air is applied to the upper end of the hollow tube so that low pressure air flowing vertically downward flows in the hollow tube.
- the introduction means is provided, the bubbles generated on the water surface in the measuring tank can be removed by a low-pressure air flow, so that the measurement accuracy of the electrode type sensor can be improved. If the lower end of the hollow tube was set slightly below the water surface of the immersed aggregate at the position where the lower end of the electrode type sensor was in contact with the water surface of the immersed aggregate, it was removed once. There is no danger that bubbles will collect again at the lower end of the electrode sensor.
- the bottom lid may be of any structure as long as it can open and close the bottom opening of the measuring tank main body and can maintain watertightness in a closed state.
- the lid is connected by a predetermined link member so as to rotate while moving to the side of the measuring tank main body, and a predetermined bottom lid opening / closing actuator is fixed to a side surface of the main body at a lower end thereof.
- the bottom lid opening / closing actuator has a piston rod tip and a lifting / lowering port that is pin-connected to the bottom lid.
- the connecting member is connected to the vertical guide body via a predetermined connecting member, and the connecting member is slidable along a vertical guide body protruding from a side surface of the main body. If the bottom cover is fitted, the space required in the height direction to completely open the bottom cover can be reduced, and the bottom cover opening / closing operation can be stabilized.
- the bottom lid and the measuring tank main body are connected by two link members having different lengths, when the bottom lid is pushed down by the lifting rod, the bottom lid turns around the measuring tank main body. However, when the bottom lid is lifted up by the lifting rod, the bottom lid is almost parallel to the bottom opening of the measuring tank just before closing the bottom lid. As a result, substantially uniform pressure is applied to the sealing material provided on the bottom opening or the bottom lid, so that uniform watertightness can be secured along the bottom opening and partial damage to the sealing material can be achieved. Can also be prevented.
- the apparatus includes washing water spraying means capable of spraying washing water onto the upper surface of the bottom cover from a washing nozzle attached in the vicinity of the bottom cover.
- a washing water storage tank connected to the washing nozzle, washing water supply means connected to the washing water storage tank, a high-pressure air tank connected to the washing water storage tank via a switching valve, And a compressor connected to an air tank.
- the switching valve is set to a first switching position to connect the washing water storage tank to the high-pressure air tank.
- the compressor is driven in advance to accumulate high-pressure air in the high-pressure air tank, and the cleaning water storage tank is supplied from the cleaning water supply means. Previously transferred a predetermined amount of the washing water.
- the switching valve is switched to the second switching position where the washing water storage tank does not communicate with the high-pressure air tank but communicates with the atmosphere.
- the switching valve is switched to the first position.
- the high-pressure air accumulated in the high-pressure air tank is sent to the washing water storage tank, and the washing water in the tank is jetted from the washing nozzle by the pressure. Therefore, even if the aggregate is attached to the upper surface of the bottom lid when the water-immersed aggregate is discharged, the aggregate is washed with the above-mentioned washing water and blown off, so that the bottom lid is closed for the next measurement. However, no aggregate is trapped between the measuring tank body and the bottom lid.
- N may be replaced with 1 in the following description.
- the first aggregate and water are poured into the measuring tank so that the first aggregate becomes a water-immersed aggregate that does not have a water surface force.
- the former In charging the aggregate and water into the measuring tank, it is optional to put the former first.However, if the water is supplied first, the force is applied, and then the aggregate is supplied, the fine aggregate is particularly used. In such a case, it becomes possible to suppress air bubbles from being mixed into the water-immersed aggregate.
- the total mass M fl of the flooded aggregate is measured.
- To measure the total mass M fl of the water-immersed aggregate may be subtracted the mass of the measuring tank only from the mass of the metering tank when filled with water Hitahone material.
- the second aggregate is put into a measuring tank so that the second aggregate becomes a water-immersed aggregate that does not have a water surface force. Measure the total mass M f2 of.
- the density at the table dry state of the first aggregate Pal at a desired level the density p w Density p a2 ⁇ beauty water set total mass M f2 and advance in-dry state of the second aggregate Along with the total volume of immersed aggregate V f2 required for a certain second water level,
- M a2 p a2 ((M f2 -M al )-pw (V f 2 -M al / p al )) / (p a2 -Pw) (2)
- the total mass MfN of the water-immersed aggregate is measured.
- the weighing result is compared with the original on-site recipe set according to the indicated recipe, and the on-site recipe is corrected as necessary. That is, the measured weight of the aggregate is compared with the initially set weight of the on-site blended aggregate, and the mixing amount of one batch is corrected according to the ratio, and water shortage is determined according to the power ratio. Replenish the water as secondary water, or drain the excess water, and weigh the other concrete materials, such as cement and admixtures, by modifying the original in-situ formulation according to the above ratio.
- a kneading mixer and knead Into a kneading mixer and knead.
- the surface water rate of each aggregate is calculated by the following procedure. That is, the amount of water supplied to the measuring tank was measured in advance, and the amount of water absorbed by the measuring tank was measured in the storage tank for measuring water absorption. Calculate the surface water content of aggregate using the accumulated value of.
- the cumulative value of the amount of water supplied to the measuring tank ⁇ ⁇ does not always increase, and it is considered that the amount of water initially supplied is the cumulative value, that is, the cumulative value is constant without fluctuating. Can be In addition, the amount of water absorption from the measuring tank ⁇ 0 is not always absorbed, and the accumulated value may be zero.
- the measured value of the remaining aggregate that has been reduced is corrected using the surface water rate calculated in this manner. Also in the case of the second invention, if the amount of water supplied to the measuring tank is measured in advance, the amount of water absorption M from the measuring tank measured in the storage tank for measuring water absorption. By using the accumulated value of, the surface water content of the aggregate can be calculated with high accuracy in the same manner as described above.
- the surface water of the aggregates is indirectly calculated as a part of the mass M w of the water, taking into account the dispersion of the aggregates in different wet conditions.
- the addition of the j-th aggregate is terminated, and the water level of the immersed aggregate at that time is set in advance. If the j-th water level has not been reached, water is replenished to reach the j-th water level, and the total mass M fj of the water-immersed aggregate is re-measured.
- FIG. 1 is an overall view of a preferred concrete material measuring device according to the first invention
- FIG. 2 is a view showing the operation of the electrode type sensor 7, the hollow pipe 21 in which the sensor is arranged, and the water absorption pipe 16,
- Fig. 3 is a detailed side view of the measuring tank
- FIG. 4 is an overall view of a preferred concrete material measuring device according to the second invention.
- FIG. 1 is an overall view showing a concrete material measuring device according to the present embodiment.
- a measuring device 1 for a conglomerate material includes an aggregate hopper 3 as an aggregate supply means for supplying fine aggregate 2 as an aggregate, and a water supply pipe as a water supply means. 4, an aggregate weighing bin 51 for storing and weighing the fine aggregate 2 supplied from the aggregate hopper 3, and the fine aggregate 2 supplied from the aggregate hopper 3 to the water supplied from the water supply pipe 4.
- a load cell 6 as a means for measuring the mass of the immersed aggregate in the weighing tank, and a weighing tank 5 for measuring the mass of the immersed aggregate in the weighing tank.
- the aggregate hopper 3 and the load cell 6 are respectively mounted on a stand (not shown), and the support bracket 9 of the measuring tank 5 is placed on the load cell and the measuring tank 5 is hung, so that the quality of the measuring tank is improved.
- the amount can be measured with the load cell 6.
- the load sensor 6 is preferably provided, for example, at three locations on the same horizontal plane every 120 ° so that the measurement tank 5 can be suspended and measured in a stable state.
- the aggregate weighing bin 51 is suspended on the load cell by being placed on a load cell 52 attached to a gantry (not shown). It can be measured with.
- a swingable bottom cover 53 is provided below the aggregate weighing bin 51, and the aggregate whose weighing is completed by swinging the bottom cover to the side is not illustrated. Can be put into
- the measuring tank 5 is formed in a hollow truncated cone shape so that the inner diameter increases toward the bottom, and the measuring tank 5 and the bottom opening of the measuring tank main body are opened and closed in a state where water tightness can be maintained. It consists of the bottom lid 11 and naturally drops downward just by opening the bottom lid 11 without closing the weighed aggregate in the measuring tank without using a vibrator or other vibration device. This can be fed into a kneading mixer (not shown) together with separately measured cement and coarse aggregate.
- the volume of the measuring tank 5 is arbitrary, and may be the unit required for mixing concrete, that is, the total amount necessary for one batch, or may be a volume that is assumed to be measured in several batches. Les ,.
- a lift gate 12 that is linked to the load cell 6 is provided, and by closing the lift gate 12 according to the mass value measured by the load cell 6, the fine bone to the measuring tank 5 is closed.
- the supply of material 2 can be stopped.
- a vibration feeder 13 having an electromagnetic vibrator extending to the upper opening of the measuring tank 5.
- the vibration feeder is used to measure the force directly below the aggregate hopper 3.
- a lift gate 54 is provided at the lower end opening of the aggregate hopper 3 in conjunction with the load cell 52. By closing the lift gate 54 according to the mass value measured by the load cell 52, the aggregate weighing bin is closed. The supply of fine aggregate 2 to 51 can be stopped.
- a vibration feeder 13 having an electromagnetic vibrator extending to the upper opening of the aggregate weighing bin 51 is provided immediately below the lower end opening of the aggregate hopper 3, a vibration feeder 13 having an electromagnetic vibrator extending to the upper opening of the aggregate weighing bin 51 is provided. Direct force Upper opening of aggregate weighing bin 51 By transporting the fine aggregate 2 to the fine aggregate, it is possible to prevent the fine aggregate from being aggregated and, consequently, from being mixed with air bubbles.
- the water supply pipe 4 is provided with a water supply valve 14, and by opening and closing the valve, the work of supplying water to the measuring tank 5 can be performed. '
- the electrode-type sensor 7 is connected to a sensor control device 15 having a built-in power supply, and monitors a change in an energized state when the lower end touches the surface of the immersed aggregate stored in the measuring tank 5.
- the water level of the immersed aggregate can be measured.
- one electrode terminal of a power supply (not shown) built in the sensor control device 15 is electrically connected to the electrode type sensor 7, and the other electrode terminal is electrically connected to, for example, a steel measuring tank 5. I just need.
- the water level holding device 8 is connected to the water absorption pipe 16, which is set up and down freely, connected to the water absorption pipe, and connected to the water absorption measurement tank 17 for measuring water absorbed, and connected to the water absorption measurement tank. It is composed of an intake fan 18 as an intake means, and the water absorption measuring tank 17 can measure the mass of water absorbed by the load sensor 19.
- the water absorption pipe 16 is connected to a biston rod of a water absorption pipe lifting / lowering actuator 20 attached to a side surface of the measuring tank main body 10, and is configured to be able to move up and down by driving the water absorption pipe lifting / lowering actuator. It is desirable to employ, for example, an electric servo cylinder for the suction pipe lifting / lowering actuator 20 to ensure vertical movement accuracy.
- the above-mentioned electrode-type sensor 7 is disposed in a hollow tube 21 so as to obtain a sufficient force in FIG. 2 (a), and the hollow tube is fixed to a water absorption tube 16. . That is, the hollow tube 21 and the electrode-type sensor 7 disposed inside the hollow tube 21 are configured to be able to be moved up and down by the water-absorbing-tube elevating actuator 20 in conjunction with the water-absorbing tube 16.
- the upper end of the hollow tube 21 is connected to a low-pressure air pump 22 which is a low-pressure air introducing means via, for example, a vinyl tube, and is driven into the hollow tube 21 by driving the low-pressure air pump 22.
- a low-pressure air pump 22 which is a low-pressure air introducing means via, for example, a vinyl tube, and is driven into the hollow tube 21 by driving the low-pressure air pump 22.
- the bottom cover 11 is connected to the side surface of the measuring tank body 10 via a link member 41 having a shorter length and a link member 42 longer than the link member.
- a link member 41 having a shorter length and a link member 42 longer than the link member.
- the small turning radius by the link member 41 and the large turning radius by the link member 42 allow the bottom cover 10 to turn around the measuring tank body 10 so as to be turned around. I'm sorry.
- Bottom lid opening / closing actuators 43, 43 are installed on the side surface of the measuring tank main body 10 so as to be fixed at the lower ends thereof. The tip of the piston rod of the bottom lid opening / closing actuator is connected to the bottom lid.
- the end of a lifting rod 44 pin-connected to 11 is connected via a connecting member 45 via a connecting member 45, and the connecting member is slidable along a vertical guide 46 projecting from the side surface of the measuring tank body 10.
- the connecting member 45 is fitted to the vertical guide body 46 so as to be as follows.
- the vertical guide body 46 can be configured by, for example, vertically welding a T-shaped steel material to the side surface of the measuring tank main body 10.
- the concrete material measuring device 1 is provided with a washing water spraying device 30 as washing water spraying means for spraying washing water on the upper surface of the bottom cover 11.
- the apparatus is equipped with a washing nozzle 31 attached near the bottom cover 11 and a washing water storage tank 33 connected to the washing nozzle 31 via a washing valve 32.
- the high-pressure air tank 39 is connected to the water storage tank 33 and a compressor 40 is connected to the high-pressure air tank.
- the switching valve 38 connects the washing water storage tank 33 to the high-pressure air tank at the first switching position. Communication with the 39 The switching position 2 communicates with the atmosphere.
- a measuring tank 5 for measuring as water-immersed aggregate and only the fine aggregate are measured.
- the aggregate hopper 3 is configured to be able to supply the fine aggregate 2 to the aggregate weighing bin 51 and the measuring tank 5, respectively.
- the water absorbing pipe 16 is driven up and down by driving the water absorbing pipe elevating actuator 20 in advance, so that the water immersion in the measuring tank 5 is prevented. Position the water inlet provided at the lower end of the water intake pipe 16 so that the water level of the aggregate is maintained at the desired level. Decide. How far the water inlet of the water suction pipe 16 should be positioned from a desired water level may be determined as appropriate after conducting experiments and the like.
- the water absorbed through the water absorption pipe 16 is stored in the storage tank 17 for measuring water absorption, and the surface water rate of the fine aggregate 2 is obtained by measuring the mass.
- the remaining aggregate put into the aggregate weighing bin 51 is weighed as it is, as described above. Therefore, by using such a surface water rate, it is possible to grasp the surface water with higher accuracy and higher accuracy even for the aggregate weighed as in the past.
- the fine aggregate 2 composed of two types of fine aggregates A and B is reduced and reduced.
- the following description is based on the assumption that one of the divided aggregates is sequentially charged into the measuring tank 5 and the other aggregate is sequentially charged into the aggregate storage bin 51.
- d i 1, 2 ).
- the water-immersed fine aggregate filling rate F which is the volume ratio of the reduced fine aggregate and the fine aggregate in the total volume of water.
- Set the force hunt Immersion fine aggregate filling factor F and a batch of Mixing amount N Q in Motodzure, Te set the volume of fine aggregate, then, fine aggregate A, the fine aggregate B From the mixing ratio and their densities in the surface dry state, determine the target input mass of fine aggregate A and fine aggregate B in the surface dry state, and then add fine aggregate A to the first water (primary measuring water).
- the mass in the state where is charged is the target mass M dl of the immersed aggregate, and the immersed aggregate is Further, the mass in a state in which the fine aggregate B is charged is defined as a target mass M d2 of the water-immersed aggregate.
- the fine aggregate A and water are charged into the measuring tank 5 so that the fine aggregate becomes a water-immersed aggregate that does not come out of the water surface.
- the fine aggregate A and the water are charged into the measuring tank 5, it is preferable that the fine aggregate A be charged beforehand, and then the fine water is added to the water-immersed aggregate in order to suppress the incorporation of air bubbles.
- fine aggregate A is not directly charged into the measuring tank 5, but as shown in FIG. 1, if the fine aggregate A is conveyed to the measuring tank 5 using a vibration feeder 13 having an electromagnetic vibrator, Aggregation of fine aggregate and, consequently, air bubbles can be prevented.
- the water level of the water-immersed aggregate in the measuring tank 5 is adjusted to a desired level by appropriately raising and lowering the water absorption pipe 16 of the water level maintaining device 8 in advance.
- the water inlet provided at the lower end of the water suction pipe 16 is positioned so as to be held at a certain first water level.
- the total mass M fl of the immersion aggregate is measured by the load cell 6.
- the mass force of the measuring tank 5 when filled with the immersed aggregate may be subtracted from the mass of the measuring tank 5 alone.
- the measurement of the total mass M fl of the water-immersed aggregate Is performed in real time or at predetermined time intervals, and extra water is supplied to the water level holding device 8 so that the water level of the water-impregnated aggregate does not exceed the first desired water level set in advance during the introduction of the fine aggregate A. in with water, when the total mass M fl of the water-immersed aggregate has reached the target mass M dl of water-immersed aggregate ends the introduction of fine aggregate a.
- the lifting gate 12 provided at the lower end opening of the aggregate hopper 3 is linked to the load cell 6, the total mass M fl of the water-immersed aggregate reaches the target mass M dl of the water-immersed aggregate. At this time, the lift gate 12 is closed by the control signal from the load cell 6, and the charging of the fine aggregate A is automatically stopped.
- the density Pal of the fine aggregate A in the surface dry state and the density Pw of the water are determined by the total mass M fl of the immersed aggregate and the total immersion aggregate determined for the first water level set in advance.
- the electrode level sensor indicates that the water level of the immersed aggregate has not reached the first preset water level.
- 7 of the total mass M fl of the water-immersed aggregate on supplemented with water to a water level of the first remeasurement and-dry state of fine aggregate a mass M al Perform recalculation.
- the fine aggregate B is put into the measuring tank 5 so that the fine aggregate becomes a water-immersed aggregate that does not come out of the water surface.
- the water absorption pipe 16 is appropriately raised and lowered in advance so that the water level of the immersed aggregate in the measuring tank 5 becomes a height that is maintained at the second water level, which is a desired water level. Position the water inlet provided at the lower end of the tub.
- the total mass M f2 of the flooded aggregate is measured.
- the total mass M f2 of the immersed aggregate is measured.
- the measurement of f2 is performed in real time or at a predetermined time interval, and extra water is added so that the water level of the immersed aggregate does not exceed the second predetermined water level as the predetermined desired water level during the introduction of the fine aggregate B. while water in the water level holding device 8, when the total mass M f2 of the water-immersed aggregate has reached the target mass M d2 of the water-immersed aggregate ends the introduction of fine aggregate B.
- the measured masses of fine aggregate A and fine aggregate B are compared with the initially set masses of fine aggregate A and fine aggregate B formulated in the field, and the set fine aggregates are compared.
- the original formulation is corrected using the ratio and weighed.
- the bottom lid 11 rotates so as to wrap around the measuring tank body 10 as shown by the broken line in FIG. The aggregate falls downward from the bottom opening of the measuring tank body 10.
- the bottom lid 11 is washed for the next weighing operation.
- the compressor 40 is driven in advance to accumulate high-pressure air in the high-pressure air tank 39, and a predetermined amount of washing water is transferred from the washing water supply tank 34 to the washing water storage tank 33.
- the switching valve 38 is switched to the second switching position where the washing water storage tank 33 does not communicate with the high-pressure air tank 39 but communicates with the atmosphere.
- the bottom cover 11 is opened in accordance with the above-described procedure, and the switchover valve 38 is switched to the first position.
- the high-pressure air accumulated in the high-pressure air tank 39 is sent to the washing water storage tank 33, and the washing water in the tank is jetted from the washing nozzle 31 by the pressure, and the high-pressure air is applied to the upper surface of the bottom cover 11. Blow away the attached aggregate.
- the switching valve 38 is switched to the second position again to accumulate the high-pressure air and transfer the flushing water to prepare for the next cleaning work after measurement.
- the weighed values measured in the conventional way in the aggregate weighing bin 51 for the remaining reduced parts were calculated using the surface water percentage calculated by the force procedure. to correct.
- the surface water of the fine aggregate ⁇ , the fine aggregate ⁇ is in a state in which the dispersion of the aggregates having different wet states is considered.
- the mass of water is calculated indirectly as part of the mass of water M w
- the water level of the water-immersed aggregate in the measuring tank 5 is maintained at a desired water level by appropriately raising and lowering the water absorption pipe 16 with the water level maintaining device 8.
- the water inlet provided at the lower end of the water absorption pipe is positioned so that when the water-immersed aggregate in the measuring tank 5 reaches a desired water level, excess water exceeding the desired water level is obtained. Is absorbed by the intake fan 18 via the water absorption pipe 16, and the volume of the water-immersed aggregate in the measuring tank 5 can be maintained at a predetermined volume by virtue of the force. The labor of measurement can be saved.
- the electrode type sensor 7 is arranged in the hollow tube 21 and fixed to the water absorbing tube 16 together with the hollow tube, and the inside of the hollow tube 21 is Since the vertical low-pressure air is allowed to flow, bubbles generated on the water surface in the measuring tank 5 can be removed by the low-pressure air flow, and the measurement accuracy of the electrode sensor 7 can be improved.
- the position is set once. There is no danger that the removed bubbles will collect at the lower end of the electrode type sensor 7 again.
- the bottom lid 11 and the measuring tank main body 10 are connected by the link members 41 and 42 having different lengths, that is, rotating radii.
- the bottom lid 11 rotates so as to be turned around the side of the measuring tank main body 10.
- the space below the height required to completely open the bottom cover 11 can be suppressed. That is, in the conventional opening / closing type, when the bottom cover is opened, the bottom cover hangs down, so that it is necessary to secure the opening / closing height of the bottom cover in the height direction accordingly. Since the lower space required for such opening and closing can be suppressed, the opening at the bottom of the measuring tank main body 10 can be lowered by that much, and the dosing into the kneading mixer can be performed reliably.
- the bottom cover 11 Immediately before the bottom cover 11 is closed, the bottom cover is in a posture substantially parallel to the bottom opening of the measuring tank main body 10 due to the action of the two link members 41 and 42 described above. Therefore, a substantially uniform pressure acts on the sealing material (not shown) provided on the bottom opening of the measuring tank main body 10 or the bottom cover 11. A uniform watertightness can be ensured along the bottom opening, and partial damage of the sealing material can be prevented.
- the cleaning water is sprayed on the upper surface of the bottom cover 11 by the cleaning water spraying device 30, so that the bottom cover 11 is discharged when the immersion aggregate is discharged. Even if the aggregate is attached to the upper surface, the aggregate is washed with the above-mentioned washing water and blown off. Even if the bottom lid 11 is closed for the next measurement, the aggregate tank 10 and the bottom are not removed. The aggregate is not sandwiched between the lid 11 and the lid. As a result, it is possible to prevent the gap force caused by the sandwiched aggregate from causing water leakage and to cause an error in weighing, and to prevent damage to the seal members provided in the weighing tank body 10 and the bottom lid 11. I will not give it.
- a measuring tank 5 for measuring as water-immersed aggregate Aggregate weighing bins 51 for weighing only fine aggregates A and B are provided. Fine aggregates A and B are reduced, and one is weighed as immersed aggregate in measuring tank 5, and the other is weighed. As before, weighing was carried out in the aggregate weighing bin 51, so when compared with ordinary concrete, for example, the aggregate was relatively larger than water due to small slump and poor blending. Even in this case, a certain amount of fine aggregates A and B are accurately measured by the immersion aggregate measurement using the measuring tank 5, and the remaining fine aggregates A and B are measured. By using the surface water rate calculated in the process of immersion aggregate measurement, the fine bone can be obtained with a much higher surface water rate than before. It can be corrected A, the weight value of B.
- the fine aggregates A and B may be supplied.
- the fine aggregates A and B charged in the measuring tank 5 are leveled by vibration of the vibrator, and the fine The material can be kept out of the water.
- two types of fine aggregates have been described as an example. However, it is needless to say that the number of types of aggregates is arbitrary, and the present invention can be applied to one type of fine aggregates. It goes without saying that the present invention can be applied to only coarse aggregate or a combination of fine aggregate and coarse aggregate.
- the load cell 6 is a compression type, and the number of installations is three.
- the type of load cell used as the force-immersed aggregate mass measuring means is arbitrary, and for example, a tension type is used. It is good, and it does not work even if four or more are installed. Also, as long as the measuring tank 5 can be stably suspended, one or two measuring tanks may be used.
- the washing water supply means is constituted by the washing water supply valve 37, the flow rate regulating valve 36, the washing water pump 35 and the washing water supply tank 34, but how the washing water supply means of the present invention is constituted This is optional, and instead of such a configuration, for example, a water pipe and a valve provided on the water pipe may be used.
- FIG. 4 is an overall view showing a concrete material measuring device according to the present embodiment.
- a concrete material measuring device 61 according to the present embodiment includes an aggregate hopper 3 as an aggregate supply means for supplying fine aggregate 2 as an aggregate, and a water supply pipe 4 as a water supply means.
- a measuring tank 5 for storing fine aggregate 2 supplied from the aggregate hopper 3 together with water supplied from the water supply pipe 4 as immersed aggregate, and measuring the mass of the immersed aggregate in the measuring tank Load cell 6 as a means for measuring the weight of the immersed aggregate, electrode type sensor 7 as a water level measuring means for measuring the water level of the immersed aggregate in the measuring tank 5, and the water level of the immersed aggregate in the measuring tank 5 ⁇ And a water level holding device 8 as water level holding means for holding the water at a desired water level.
- the aggregate hopper 3, the load cell 6, the water supply pipe 4, and the measuring tank 5 have been described in the first embodiment, and therefore detailed description is omitted here.
- a lift gate 12 interlocking with the load cell 6 is provided, and the fine gate 2 is supplied to the measuring tank 5 by closing the lift gate 12 in accordance with the mass measured by the load cell 6. It can be stopped.
- a vibration feeder 13 having an electromagnetic vibrator extending to an upper opening of the measuring tank 5 is provided directly below a lower end opening of the aggregate hopper 3, and the vibration feeder is used to measure from just below the aggregate hopper 3.
- the electrode type sensor 7 is connected to a sensor control device 15 having a built-in power supply, and is turned on when the lower end touches the surface of the immersed aggregate stored in the measuring tank 5. By monitoring the change, the water level of the immersed aggregate can be measured.
- a power supply (not shown) built in the sensor control device 15 is electrically connected to the electrode type sensor 7, and the other electrode terminal is electrically connected to, for example, a steel measuring tank 5. It is good.
- the water level holding device 8 also includes a water absorption pipe 16 installed to be able to move up and down, a water absorption measurement storage tank 17 connected to the water absorption pipe and measuring water absorbed, and a water absorption measurement tank 17. It is composed of an intake fan 18 which is an intake means connected to the storage tank, and the water absorption and measurement storage tank 17 can measure the mass of water absorbed by the load cell 19.
- the water absorption pipe 16 is connected to a biston rod of a water absorption pipe lifting / lowering actuator 20 attached to a side surface of the measuring tank main body 10, and is configured to be able to move up and down by driving the water absorption pipe lifting / lowering actuator. It is desirable to employ, for example, an electric servo cylinder for the suction pipe lifting / lowering actuator 20 to secure the lifting accuracy.
- the above-mentioned electrode type sensor 7 is disposed in a hollow tube 21 similarly to the first embodiment described with reference to FIG. It is fixed to. That is, the hollow tube 21 and the electrode-type sensor 17 disposed inside the hollow tube 21 are configured to be able to move up and down by the water-absorbing tube lifting / lowering actuator 20 in conjunction with the water-absorbing tube 16.
- the upper end of the hollow tube 21 is connected to a low-pressure air pump 22 which is a low-pressure air introducing means via, for example, a vinyl tube, and is driven into the hollow tube 21 by driving the low-pressure air pump 22.
- a low-pressure air pump 22 which is a low-pressure air introducing means via, for example, a vinyl tube, and is driven into the hollow tube 21 by driving the low-pressure air pump 22.
- the bottom lid 11 has a shorter length, a link member 41, and a longer length than the link member, and is measured via a link member 42. It is connected to the side surface of the tank main body 10, and when the bottom lid is pushed down, it turns around to the side of the measuring tank main body 10 due to the small turning radius by the link member 41 and the large turning radius by the link member 42. c and summer to be able to rotate as A bottom lid opening / closing actuator 43, 43 is provided on a side surface of the measuring tank body 10 so as to be fixed at a lower end thereof, and a tip of a piston rod of the bottom lid opening / closing actuator and a bottom lid.
- the end of a lifting rod 44 pin-connected to 11 is connected via a connecting member 45 via a connecting member 45, and the connecting member is slidable along a vertical guide 46 projecting from the side surface of the measuring tank body 10.
- the connecting member 45 is fitted to the vertical guide body 46 so as to be as follows.
- the concrete material measuring device 61 is provided with the washing water spraying device 30 as a washing water spraying means for spraying the washing water on the upper surface of the bottom cover 11. Since it has already been described in the first embodiment, the description is omitted here.
- the fine aggregate 2 is composed of two types of fine aggregates A and B, and these are sequentially input. It is explained assuming that The procedure for measuring water and fine aggregate 2 is almost the same as that in the first embodiment, and a detailed description thereof will be omitted as appropriate.
- the water absorption pipe lifting actuator 20 is driven to raise and lower the water absorption pipe 16 in advance, so that the water level of the immersed aggregate in the measuring tank 5 is maintained at a desired water level. Locate the provided water inlet. The force at which the water level in the measuring tank 5 is at the desired level is checked separately by the electrode type sensor 7 which is a water level measuring means.
- fine aggregate A and water are charged into the measuring tank 5 as in the first embodiment.
- the water level of the water-immersed aggregate in the measuring tank 5 is adjusted to a desired level by raising and lowering the water absorption pipe 16 of the water level maintaining device 8 in advance as appropriate.
- the water inlet provided at the lower end of the water suction pipe 16 is positioned so as to be maintained at a certain first water level.
- the total mass M fl of the immersion aggregate is measured by the load cell 6.
- yo is subtracted the mass of only the measuring tank 5 from the mass of the measuring vessel 5 when filled with water-immersed aggregate les.
- the procedure for measuring the total mass Mfl of the flooded aggregate is as described in the first embodiment, while the fine aggregate A is continuously or intermittently charged at a predetermined speed. M fl measurement in real time Alternatively, during the injection of fine aggregate A, extra water is supplied to the water level holding device 8 so that the water level of the immersed aggregate does not exceed the first predetermined water level as the predetermined desired water level during the introduction of fine aggregate A. in with water, when the total mass M fl of the water-immersed aggregate has reached the target mass M dl of water-immersed aggregate ends the introduction of fine aggregate a.
- the lifting gate 12 provided at the lower end opening of the aggregate hopper 3 is linked to the load cell 6, the total mass M fl of the water-immersed aggregate reaches the target mass M dl of the water-immersed aggregate. At this time, the lift gate 12 is closed by the control signal from the load cell 6, and the charging of the fine aggregate A is automatically stopped.
- the electrode type sensor 7 it is separately confirmed by the electrode type sensor 7 that the water level at the end of the charging reaches the first water level.When the water level rises due to the charging of the fine aggregate A and approaches the first water level. Then, the low-pressure air pump 22 is operated to feed low-pressure air into the hollow tube 21. In this way, as shown in FIG. 2 (b) of the first embodiment, bubbles generated on the water surface of the immersed aggregate escape around the hollow tube 21, so that the water in the measuring tank 5 When the water level of the infiltrated aggregate reaches the first water level, as shown in Fig. 3 (c), the water level of the infiltrated aggregate is accurately detected by the electrode-type sensor 7 which is not disturbed by bubbles generated on the surface of the infiltrated aggregate. Can be detected.
- the density p al of the fine aggregate A in the surface dry state and the density p w of the water are calculated based on the total mass M fl of the water-aggregated aggregate and the preset water level determined for the first water level.
- equation (1) Substituting equation (1) with the total volume V fl of the fine aggregate A, the surface dry mass M al of the fine aggregate A is obtained.
- the electrode level sensor indicates that the water level of the immersed aggregate has not reached the first preset water level.
- 7 of the total mass M fl of the water-immersed aggregate on supplemented with water to a water level of the first remeasurement and-dry state of fine aggregate a mass M al Perform recalculation.
- the fine aggregate B is put into the measuring tank 5 so that the fine aggregate becomes a water-immersed aggregate that does not come out of the water surface.
- the water absorption pipe 16 is appropriately raised and lowered in advance so that the water level of the immersed aggregate in the measuring tank 5 becomes a height that is maintained at the second water level, which is a desired water level. Position the water inlet provided at the lower end of the tub.
- the total mass M f 2 of the immersed aggregate is measured.
- the total mass M of the water-immersed aggregate Measurement of f2 is performed in real time or at predetermined time intervals. While absorbing excess water with the water level holding device 8 so that the water level does not exceed the second predetermined water level as the predetermined desired water level, the total mass M f2 of the water immersed aggregate is When the target mass M d2 is reached, the charging of the fine aggregate B is terminated.
- the low-pressure air pump 22 is operated to send low-pressure air into the hollow pipe 21.
- the water level can be accurately detected by the electrode-type sensor 7 without being disturbed by bubbles generated on the surface of the water-immersed aggregate.
- the density p al of the fine aggregate A in the surface dry state, the density p a2 of the fine aggregate B in the surface dry state and the density p w of the water are set to the total mass M f2 and the second water level set in advance. with total volume V f 2 of the water-immersed aggregate obtained for, (3) and (4) is substituted into finding a table dry state mass M a2 and mass M w of water fine aggregate B.
- the electrode type sensor indicates that the water level of the immersed aggregate has not reached the second preset water level.
- the ratios are used to correct and weigh the original site formulation.
- water compare the initially set water volume with the measured water volume, and replenish the shortage as secondary water or drain excess water. Then, these concrete materials are put into a kneading mixer and kneaded.
- the bottom lid opening / closing actuators 43, 43 are operated in the same manner as in the first embodiment described with reference to FIG. Then the piston rod should be retracted.
- the bottom lid 11 is washed for the next weighing operation.
- the compressor 40 is driven in advance to accumulate high-pressure air in the high-pressure air tank 39, and a predetermined amount of washing water is transferred to the washing water supply tank 34 and the washing water storage tank 33.
- the switching valve 38 is switched to the second switching position where the washing water storage tank 33 does not communicate with the high-pressure air tank 39 but communicates with the atmosphere.
- the bottom cover 11 is opened in accordance with the above-described procedure, and the switchover valve 38 is switched to the first position.
- the high-pressure air accumulated in the high-pressure air tank 39 is sent to the washing water storage tank 33, and the washing water in the tank is jetted from the washing nozzle 31 by the pressure, and the high-pressure air is applied to the upper surface of the bottom cover 11. Blow off aggregates that have adhered.
- the switching valve 38 is switched to the second position again to accumulate the high-pressure air and transfer the flush water to prepare for the next cleaning work after measurement.
- the surface water of the fine aggregate ⁇ and the fine aggregate ⁇ The mass of water is calculated indirectly as part of the mass of water M w
- the water level of the water-impregnated aggregate in the measuring tank 5 is maintained at a desired water level by appropriately raising and lowering the water absorption pipe 16 with the water level maintaining device 8.
- the water suction port provided at the lower end of the water suction pipe is positioned, so that when the water immersed aggregate in the measuring tank 5 reaches a desired water level, excess water exceeding the desired water level is removed. Then, the water is absorbed by the intake fan 18 through the water absorption pipe 16, and the volume of the water-immersed aggregate in the measuring tank 5 can be maintained at a predetermined volume by force. It is possible to save time and effort.
- the electrode-type sensor 7 is disposed in the hollow tube 21 and fixed to the water absorbing tube 16 together with the hollow tube, and the inside of the hollow tube 21 is vertically extended. Since the downward low-pressure air is made to flow, it is possible to remove bubbles generated on the water surface in the measuring tank 5 with a low-pressure air flow, and the measurement accuracy of the electrode-type sensor 7 can be improved.
- the lower end of the hollow tube 21 is connected to the water surface of the immersed aggregate. If the position is set so that it sinks slightly, there is no danger that the bubbles once removed will collect at the lower end of the electrode type sensor 7 again.
- the bottom lid 11 and the measuring tank main body 10 are connected by the link members 41 and 42 having different lengths, that is, rotating radii.
- the bottom lid 11 rotates so as to be turned around the side of the measuring tank main body 10.
- the space below the height required to completely open the bottom cover 11 can be suppressed. That is, in the conventional opening / closing type, when the bottom cover is opened, the bottom cover hangs down, so that it is necessary to secure the opening / closing height of the bottom cover in the height direction. Since the lower space required for such opening and closing can be suppressed, the opening at the bottom of the measuring tank main body 10 can be reduced by that much, and the dosing into the kneading mixer can be reliably performed.
- the bottom cover 11 Immediately before the bottom cover 11 is closed, the bottom cover is in a posture substantially parallel to the bottom opening of the measuring tank main body 10 due to the action of the two link members 41 and 42 described above. Therefore, a substantially uniform pressure acts on the sealing material (not shown) provided on the bottom opening of the measuring tank main body 10 or the bottom cover 11, and it is possible to ensure uniform watertightness along the bottom opening. In addition to this, it is possible to prevent partial damage of the sealing material.
- the cleaning water is sprayed on the upper surface of the bottom lid 11 by the cleaning water spraying device 30, so that the bottom lid 11 is discharged when the immersion aggregate is discharged. Even if the aggregate is adhered to the upper surface, the aggregate is washed with the above-mentioned washing water and blown off. Even if the bottom cover 11 is closed for the next measurement, the measuring tank main body 10 and the bottom cover are closed. Aggregate can not be sandwiched between 11 and.
- the amount of water supplied to the force measuring tank 5 not specifically mentioned in the present embodiment is measured in advance by, for example, the load cell 6, the accumulated value of the water absorbed from the measuring tank 5 can be calculated by using the storage tank 17 for measuring the water absorption. Since it can be measured by the load cell 19, the surface water content of the aggregate can be accurately measured. That is, the amount of water supplied to the measuring tank 5 M 0 , and the amount of water absorption M from the measuring tank 5 measured by the load cell 19.
- the fine aggregate charged into the measuring tank 5 is likely to become a water-immersed aggregate due to the water surface force
- the fine aggregates A and B are charged.
- the vibrator is operated in a force and caulking state, whereby the fine aggregates A and B charged into the measuring tank 5 are leveled by the vibration of the vibrator, and the fine aggregate is flattened. Aggregates can be kept from reaching the surface of the water.
- two types of fine aggregates have been described as an example.
- the number of types of aggregates is arbitrary, and the present invention can be applied to one type of fine aggregates. Needless to say, the present invention can be applied to only coarse aggregate or a combination of fine aggregate and coarse aggregate.
- the load cell 6 is a compression type and the number of installations is three.However, any load cell may be used as a means for measuring the mass of the water-immersed aggregate. Or four or more can be installed. If the measuring tank 5 can be stably suspended, one or two measuring tanks may be used.
- the cleaning water supply means is constituted by the cleaning water supply valve 37, the flow rate adjusting valve 36, the cleaning water pump 35, and the cleaning water supply tank 34.
- This is arbitrary, and instead of a powerful structure, for example, it can be composed of a water pipe and a vanoleb provided in the water pipe.
- the concrete material measuring device has a certain level of uniformity when compared with ordinary concrete, even when aggregate is relatively more than water because of, for example, a small slump and poor mixing. Quantity The fine aggregate is accurately measured by the immersion aggregate weighing in the measuring tank, and the remaining fine aggregate is calculated by using the surface water percentage calculated in the process of immersion aggregate measurement. The measured value of fine aggregate can be corrected with much higher surface water content.
- the concrete material measuring device indirectly calculates the surface water of the aggregate as a part of the mass Mw of the water in a state in which a variation between the aggregates having different wet states is considered.
- can be Rutotomoni the mass of the aggregate, can be force S grasped as a mass M a time table dry condition.
- concrete with the same amount of water as in the indicated formulation without measuring the surface water content can be used. Can be manufactured.
- a concrete material measuring device is a very useful measuring device for measuring a plurality of aggregates having different densities and / or particle sizes.
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/481,454 US7000458B2 (en) | 2001-06-20 | 2002-06-10 | Weighing equipment for concrete material |
KR1020037016550A KR100866855B1 (ko) | 2001-06-20 | 2002-06-10 | 콘크리트 재료 계량 장치 |
EP02733428A EP1405705A4 (en) | 2001-06-20 | 2002-06-10 | CONCRETE COMPONENT WEIGHING EQUIPMENT |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2001-185885 | 2001-06-20 | ||
JP2001185885A JP4099625B2 (ja) | 2001-06-20 | 2001-06-20 | コンクリート材料の計量装置 |
JP2001-185981 | 2001-06-20 | ||
JP2001185981A JP4099626B2 (ja) | 2001-06-20 | 2001-06-20 | コンクリート材料の計量装置 |
Publications (1)
Publication Number | Publication Date |
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WO2003000478A1 true WO2003000478A1 (fr) | 2003-01-03 |
Family
ID=26617244
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Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2002/005721 WO2003000478A1 (fr) | 2001-06-20 | 2002-06-10 | Equipement de pesage de constituant de beton |
Country Status (5)
Country | Link |
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US (1) | US7000458B2 (ja) |
EP (1) | EP1405705A4 (ja) |
KR (1) | KR100866855B1 (ja) |
CN (1) | CN100354094C (ja) |
WO (1) | WO2003000478A1 (ja) |
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US8274330B2 (en) | 2000-09-12 | 2012-09-25 | Black Sand Technologies, Inc. | Power amplifier circuitry and method |
CN104296846A (zh) * | 2014-04-03 | 2015-01-21 | 河南工业大学 | 粮仓及其基于最佳底面压强测量点的储粮重量检测系统 |
CN104296848A (zh) * | 2014-05-20 | 2015-01-21 | 河南工业大学 | 粮仓储粮在线检测装置、检测单元及压力传感器测量方法 |
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CA2557514A1 (en) * | 2004-02-26 | 2005-09-09 | Purdue Research Foundation | Method and apparatus for measuring properties of concrete |
KR100712731B1 (ko) * | 2005-12-26 | 2007-05-04 | 주식회사 삼표 | 레미콘 혼화재료 과계량 방지장치 |
KR100818560B1 (ko) * | 2006-11-18 | 2008-04-02 | 이상휘 | 모래와 물의 누적 계량장치와 이를 이용한 모래와 물의계량방법 |
US8311678B2 (en) * | 2010-06-23 | 2012-11-13 | Verifi Llc | Method for adjusting concrete rheology based upon nominal dose-response profile |
CN102476402B (zh) * | 2010-11-26 | 2014-09-24 | 北车兰州机车有限公司 | 砂浆车搅拌控制系统及砂浆车 |
CN103302748A (zh) * | 2013-05-28 | 2013-09-18 | 芜湖精英新型建材有限公司 | 一种配料用料浆桶结构 |
CN103909579B (zh) * | 2014-04-23 | 2016-08-24 | 上海隧道工程有限公司 | 泥浆拌制自动控制操作装置 |
KR200480705Y1 (ko) * | 2014-12-15 | 2016-06-28 | 대우산업주식회사 | 배처 플랜트 및 그를 구비하는 배처 플랜트 시스템 |
CN108627216B (zh) * | 2018-05-11 | 2020-05-22 | 华北水利水电大学 | 一种水泥仓物料实时监测装置及监测方法 |
CN109238415B (zh) * | 2018-10-25 | 2024-01-30 | 三一汽车制造有限公司 | 一种液体称量装置 |
CN110748356A (zh) * | 2019-09-27 | 2020-02-04 | 山东科技大学 | 风力驱动自动配比的混凝土喷射机 |
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
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US8274330B2 (en) | 2000-09-12 | 2012-09-25 | Black Sand Technologies, Inc. | Power amplifier circuitry and method |
CN104296846A (zh) * | 2014-04-03 | 2015-01-21 | 河南工业大学 | 粮仓及其基于最佳底面压强测量点的储粮重量检测系统 |
CN104296846B (zh) * | 2014-04-03 | 2016-09-14 | 河南工业大学 | 粮仓及其基于最佳底面压强测量点的储粮重量检测系统 |
CN104296848A (zh) * | 2014-05-20 | 2015-01-21 | 河南工业大学 | 粮仓储粮在线检测装置、检测单元及压力传感器测量方法 |
Also Published As
Publication number | Publication date |
---|---|
CN100354094C (zh) | 2007-12-12 |
KR20040012946A (ko) | 2004-02-11 |
CN1652908A (zh) | 2005-08-10 |
KR100866855B1 (ko) | 2008-11-04 |
US20050073904A1 (en) | 2005-04-07 |
EP1405705A1 (en) | 2004-04-07 |
EP1405705A4 (en) | 2006-11-29 |
US7000458B2 (en) | 2006-02-21 |
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