JP2007045027A - Kneader - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a kneader capable of kneading continuously and improving the precision of quality by mixing object materials efficiently. <P>SOLUTION: The kneader comprises a mixer 21 mixing aggregate e.g. grit, crushed stone and/or gravel, earth and sand and/or sludge with a to-be-kneaded material comprising cement, water, etc. batch by batch, two or more weighing hoppers 38 storing a specified amount of aggregate to supply to the mixer 21 and a movable chute 39 charging aggregate selectively to two or more of the weighing hoppers 38. A belt feeder 33 for quantitative supply of aggregate to the weighing hoppers 38 is disposed in the upstream of the movable chute 39, and a weighing conveyer 37 capable of controlling the carrying rate is arranged between the belt feeder 33 and the movable chute 39, so that the carrying rate of the weighing conveyer 37 decreases when the amounts of aggregate in the weighing hoppers 38 approaches predetermined values. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a kneading apparatus for mixing gravel collected from a riverbed, aggregates such as crushed stone and gravel, earth and sand, excavation sludge, sludge, and the like with cement and water.

  As a conventional kneading apparatus, a funnel-shaped hopper having an aggregate of sand and gravel, a supply portion and a discharge portion of a material to be kneaded made of cement, water, and the like is provided in multiple stages in the vertical direction and is coated using gravity. There has been a device for kneading by dropping a kneaded material in a hopper (see, for example, Patent Document 1).

  In the kneading apparatus configured as described above, since the material to be kneaded is continuously dropped and kneaded using gravity, continuous kneading is possible.

On the other hand, as an apparatus for kneading sludge and cement to solidify sludge, there has been a self-propelled soil improvement machine using a biaxial paddle mixer (see, for example, Patent Document 2).
JP 2003-236823 A JP 2004-122051 A

  When kneading is performed with the kneading apparatus of Patent Document 1, first, aggregate is collected by an excavating machine such as a backhoe, and the aggregate is quantified to the carrying-in belt conveyor via the aggregate hopper and the vibration feeder. Supply. Aggregate supplied to the conveyor belt conveyor is put into a stirring hopper (the funnel-shaped hopper). At the same time, cement and water are put into the stirring hopper. At this time, the material to be kneaded falls while being rotated by the stirring means provided in the stirring hopper, and is repeatedly kneaded and diffused by the plurality of stirring hoppers.

  However, although the kneading apparatus exhibits an excellent effect that continuous kneading can be performed, there are the following problems.

  In the kneading apparatus, the material to be kneaded is kneaded by falling under its own weight and colliding with an obstacle (such as an inclined surface of a hopper or a stirring means), but the mixing effect greatly varies depending on the number of collisions. End up. In the kneading apparatus, the stirring hopper is formed in a funnel shape, and the material to be kneaded falls inside, but even if the stirring means is used, the number of times the material to be kneaded collides with an obstacle. There was a problem that the mixing effect was small. In the kneading apparatus, it is difficult to evaluate how much the material to be kneaded is kneaded.

  By the way, when producing CSG (Cemented Sand and Gravel) material by mixing aggregate such as riverbed gravel collected around the site, cement and water, CSG material was produced by trial kneading with a pot mixer or the like. Later, a strength test is performed. However, the CSG material manufactured using the kneading apparatus has a problem that the mixing effect is smaller than that of the trial-kneaded CSG material, and the required generation strength of the CSG material cannot be obtained. The problem that the mixing effect of the material to be kneaded is small is not limited to the CSG material, but is common in the case of producing a concrete material by kneading ordinary aggregate made of crushed stone or gravel, cement and water. .

Here, in order to efficiently knead the material to be kneaded, it is desirable to knead each batch for a certain period of time using a mixer. However, when a mixer is used, continuous kneading work cannot be performed. A problem will occur.
On the other hand, the soil improvement machine of Patent Document 2 has a small processing capacity because it is self-propelled, and the accuracy with respect to the quality of the material to be kneaded is not so much considered due to the nature of the apparatus for solidifying sludge. It is not suitable for producing concrete products such as CSG materials.

  Accordingly, the present invention has been devised to solve the above-described problems, and a kneading apparatus capable of continuously kneading and efficiently mixing the materials to be kneaded to improve the quality accuracy thereof. The issue is to provide.

  The invention according to claim 1 for solving the above-mentioned problem is a mixture in which aggregates such as gravel, crushed stone and gravel or earth and sand and sludge are mixed with a material to be kneaded composed of cement and water for each batch. A mixer, a plurality of weighing hoppers that store a predetermined amount of the aggregate and supply the aggregate to the mixing mixer, and a movable chute that selectively inputs the aggregate into the plurality of weighing hoppers. A kneading apparatus.

  According to the above configuration, since the material to be kneaded next can be measured while the material to be kneaded is kneaded with the mixing mixer, the next kneading operation can be continuously performed after the kneading operation is completed. it can. Moreover, since the materials to be kneaded are kneaded for each batch by the kneading mixer, kneading can be performed efficiently, and a necessary and sufficient kneading effect can be obtained. Therefore, the quality accuracy of the material to be kneaded can be increased.

  The invention according to claim 2 is the kneading apparatus according to claim 1, wherein a belt feeder is provided on the upstream side of the movable chute to supply the aggregate to the measuring hopper.

  According to the above-described configuration, since the material can be supplied in a fixed amount by the belt feeder and can be measured by the measuring hopper, the accuracy of the supply amount of the aggregate to the mixing mixer can be greatly increased.

  According to a third aspect of the present invention, there is provided a weighing conveyor capable of controlling the conveyance speed between the belt feeder and the movable chute, and when the aggregate in the weighing hopper approaches a predetermined amount, the weighing is performed. The kneading apparatus according to claim 1, wherein the kneading apparatus is configured to reduce a conveying speed of the conveyor.

  According to the said structure, when the aggregate in a measurement hopper approaches the predetermined amount, the measurement precision in a measurement hopper can be improved by reducing a conveyance speed.

  According to a fourth aspect of the present invention, the movable chute is a rotary chute that has a flow path inclined from the rotation axis of the rotating body and changes the fall position of the aggregate by rotating the rotating body. A kneading apparatus according to any one of claims 1 to 3, characterized in that:

  According to the above configuration, the rotating mechanism for rotating the rotating chute is not positioned in the vicinity of the chute portion where the aggregate collides. Therefore, the aggregate does not collide with the rotating mechanism, and the movable flow path is selected below the chute. Compared to a chute having a plate, the movable chute can have a longer life.

  The invention according to claim 5 is characterized in that a collecting hopper for storing a plurality of batches of materials to be kneaded is provided downstream of the mixing mixer. Kneading apparatus.

  According to the said structure, a lot of to-be-kneaded materials can be loaded into conveyance vehicles, such as a dump, at once, and the conveyance efficiency of a to-be-kneaded material can be improved.

  The invention according to claim 6 is the biaxial mixer according to any one of claims 1 to 5, wherein the mixing mixer is a biaxial mixer having two spiral arms arranged in parallel. It is a kneading apparatus.

  According to the said structure, since mixing efficiency improves significantly, kneading | mixing time can be shortened and the manufacture efficiency of to-be-kneaded material improves significantly.

  The invention according to claim 7 is configured such that a cement supply device that supplies cement to the mixing mixer determines a supply cement amount according to an amount of aggregate supplied to the mixing mixer. A kneading apparatus according to any one of claims 1 to 6.

  According to the above configuration, since the cement supply amount for which the supply amount is easily adjusted is determined according to the aggregate whose supply amount is likely to fluctuate, and the individual measurement is performed, the ratio between the aggregate and the cement is always set. It can be a desirable value.

  The invention according to claim 8 is characterized in that a water supply device for supplying water to the mixing mixer is configured to determine a supply water amount according to an amount of aggregate supplied to the mixing mixer. A kneading apparatus according to any one of claims 1 to 7.

  According to the above configuration, according to the aggregate whose supply amount is likely to fluctuate, the supply amount of water that is easy to adjust the supply amount is determined and individually metered, so the ratio of aggregate to water is always It can be a desirable value.

  According to the present invention, it is possible to perform continuous kneading and to exhibit an excellent effect that the material to be kneaded can be efficiently mixed to improve the quality accuracy.

  Next, the best mode for carrying out the present invention will be described in detail with reference to the accompanying drawings.

  The kneading apparatus according to the present invention can be applied to kneading various concrete materials, kneading sludge and cement, etc., but in this embodiment, aggregate, cement and water collected around the construction site. An example of a kneading apparatus for kneading a CSG (Cemented Sand and Gravel) material composed of:

  The CSG construction method is a construction method in which cement and water are added to rocky materials such as riverbed gravel as aggregates collected around the site, and then kneaded and placed in a simple manner. The CSG method does not basically adjust the classification of aggregates in order to reduce the construction cost. This CSG method has been used in dams since 1992.

  FIG. 1 is an equipment flow diagram showing the best mode for carrying out the kneading apparatus according to the present invention, FIG. 2 is a side view showing the best mode for carrying out the kneading apparatus according to the present invention, and FIG. FIG. 4 is a front view showing the best mode for carrying out the kneading apparatus according to the present invention, FIG. 4 is a perspective view showing a weighing hopper and a rotating chute of the kneading apparatus according to the present invention, and FIG. 5 is a kneading apparatus according to the present invention. It is the perspective view which showed this mixing mixer.

  First, the configuration of the kneading apparatus according to the present embodiment will be described.

  As shown in FIG. 1, the kneading apparatus 1 mixes a material to be kneaded composed of cement, water, etc. with aggregates such as gravel, crushed stone and gravel collected around the construction site, earth and sand, sludge, and the like. A mixing unit 2 to be combined, an aggregate supply unit 3 for supplying the aggregate to the mixing unit 2, a cement supply unit 5 for supplying cement to the mixing unit 2, and a water supply unit 6 for supplying water to the mixing unit 2 And a carry-out unit 8 for sending out the CSG material kneaded in the mixing unit 2 to the conveyance vehicle 7.

  As shown in FIGS. 1 and 2, the aggregate supply unit 3 includes an input hopper 31 that inputs aggregate (not shown) collected around the construction site. The charging hopper 31 is formed in a funnel shape in which the opening on the upper surface is larger than the opening on the lower surface, and is supported by a steel frame base 32 (see FIG. 2) assembled in a frame shape. The input hopper 31 is configured such that aggregates conveyed by the conveyance vehicle 7 such as a dumper are input from the upper part thereof.

  A belt feeder 33 for supplying a fixed amount of aggregate is provided below the charging hopper 31. The belt feeder 33 includes a storage cylinder 35 (see FIG. 2) and a layer thickness adjusting plate 36 (see FIG. 2) on a belt conveyor 34 (see FIG. 2). By moving the layer thickness adjusting plate 36 and adjusting the distance between the belt conveyor 34 and the layer thickness adjusting plate 36, the aggregate stored in the storage cylinder 35 is conveyed on the belt conveyor 34 at a predetermined thickness. And metered.

  On the downstream side of the belt feeder 33, a weighing conveyor 37 for conveying the aggregate above the mixing unit 2 is provided. The weighing conveyor 37 is disposed so as to be inclined so that the carry-out side is higher than the carry-in side. The weighing conveyor 37 is an inverter control type conveyor, and is formed so that the conveyance speed can be controlled.

  Below the carry-out side end of the weighing conveyor 37, a plurality of weighing hoppers 38 that store a predetermined amount of aggregate and supply it to the mixing unit 2, and a movable that selectively inputs the aggregate into the plurality of weighing hoppers 38. A chute 39 is provided. The movable chute 39 is provided above the weighing hopper 38.

  As shown in FIGS. 4A and 4B, the movable chute 39 is composed of a rotating chute 41. The rotating chute 41 includes a rotating body 43 and a cylindrical chute (aggregate channel) 45 formed integrally with the rotating body 43. The chute 45 is formed to be inclined from the rotation axis (rotation center line indicated by a one-dot chain line) 44 of the rotating body 43. The rotating chute 41 rotates the rotating body 43 at a predetermined angle (for example, 90 ° pitch), whereby the opening 45a at the lower end of the chute 45 rotates around the rotating shaft 44, and the aggregate dropping position. Is configured to change. Although not shown, a rotating mechanism such as a gear or a chain is provided at the upper end of the rotating body 43.

  A plurality (four in this embodiment) of weighing hoppers 38 are provided. Each of the weighing hoppers 38, 38,... Is formed by partitioning the inside of a large-sized square hopper with a partition plate 46, for example. The partition plate 46 is formed in a cross shape in plan view, and the intersection 46 a is located on the extension line of the rotation shaft 44 of the movable chute 39. Opening and closing ports 47, 47,... Are respectively provided below the weighing hoppers 38, 38,. Each of the weighing hoppers 38, 38,... Is configured such that when a predetermined amount of aggregate is stored therein, the input port 47 is opened and the aggregate is dropped into the mixing unit 2 for injection. Whether or not the aggregate in the weighing hopper 38 has reached a predetermined amount is detected by measuring the weight of the aggregate or sensing the storage height (upper end surface) of the aggregate. .

  The weighing hopper 38 detects the weight of the aggregate in the weighing hopper 38 or senses the upper end surface of the aggregate to detect that the aggregate in the weighing hopper 38 has approached a predetermined amount. Send to weighing conveyor 37. When receiving the signal, the weighing conveyor 37 is configured to limit the conveying speed and to reduce the aggregate supply speed to the weighing hopper 38. Specifically, the weighing conveyor 37 operates at a conveyance speed of 90 m / min until the aggregate in the weighing hopper 38 reaches 90% of a predetermined amount, for example, and the remaining 10% has a conveyance speed. It halves and operates at a conveyance speed of 45 m / min. The conveyance speed and the speed change point are examples, and can be changed as appropriate.

  As shown in FIGS. 1 and 2, the mixing unit 2 is disposed below the weighing hopper 38. The mixing unit 2 includes a mixing mixer 21 that mixes materials to be kneaded composed of gravel, aggregates such as crushed stone and gravel, cement, water, and the like for each batch. As shown in FIG. 5, the mixing mixer 21 is a biaxial mixer 23 having two spiral arms 22, 22 arranged in parallel in the casing 24. The spiral arms 22 and 22 do not have a linear shaft, and are arranged so that the rotation paths overlap each other. As shown by the arrows in FIG. 5, the spiral arms 22 and 22 are synchronously rotated in opposite directions to prevent interference thereof. According to such a configuration, the moving range of the material to be kneaded within the casing 24 is widened, and the materials to be kneaded are mixed so as to sandwich the materials to be mixed, so that the materials to be kneaded can be efficiently mixed. . 2 and 3, reference numeral 25 denotes a motor that rotates each of the spiral arms 22 and 22, respectively. A camera (not shown) for monitoring the internal kneading state is provided on the upper portion of the mixing mixer 21.

  Below the mixing mixer 21 (downstream side), a collecting hopper 81 for storing a plurality of batches to be kneaded (kneaded CSG material) is provided. The collective hopper 81 has a storage amount (for example, one or two batches) equivalent to the loadable amount of the transport vehicle 7 such as a dump truck. A pinch gate (concrete discharge regulating valve) 82 is provided below the collective hopper 81. The pinch gate 82 is a valve that opens and closes the flow path by pressing a flow path made of wear-resistant rubber, and is suitable as an open / close valve for a granular or powdered conveyed product.

  As shown in FIG. 2, the rotary chute 41, the weighing hopper 38, the mixing mixer 21 and the collecting hopper 81 are sequentially supported from the top by the steel frame 11 assembled in a tower shape. The lower part of the steel frame 11 is formed in a gate shape, and a stop space 12 for the transport vehicle 7 is formed below the collective hopper 81.

  As shown in FIG. 3, a cement silo 51 (also shown in FIG. 1) that constitutes a part of the cement supply unit 5 is erected on the side of the steel frame 11. The cement silo 51 is provided with a bag filter 56 (see FIG. 1) so as to separate and discharge the pumped cement and air. The cement supply unit 5 includes a cement silo 51, a cement bin 52 that temporarily stores the cement supplied from the cement silo 51 above the mixing unit 2, and a cement weighing machine 53 that measures the cement supplied to the mixing mixer 21. And. Between the lower part of the cement silo 51 and the upper part of the cement bin 52, a pumping pipe 54 for pumping cement is provided. A blower 55 is connected to the pressure feed pipe 54, and the blower 55 feeds the cement in the cement silo 51 to the upper cement bin 52. On the other hand, a return pipe 57 is connected to the pressure feeding pipe 54, and is configured to send the pressure-fed air to the bag filter 56 via the cement silo 51.

  The cement weighing machine 53 (see FIGS. 1 and 3) constitutes a cement supply device that measures cement and supplies it to the mixing mixer 21. The cement weighing machine 53 is configured to determine the amount of cement to be supplied according to the amount of aggregate supplied to the mixing mixer 21. Specifically, the cement weighing machine 53 receives a signal of the aggregate supply amount from a control device (not shown) provided in the weighing hopper 38, and the aggregate and cement have a desired blending ratio. Thus, the cement supply amount is determined so that the supply amount of cement is supplied to the mixing mixer 21.

  As shown in FIG. 1, a two-stage cut butterfly valve 58 capable of adjusting the opening degree is provided between the cement weighing machine 53 and the cement bin 52. The two-stage cut-off butterfly valve 58 keeps the valve fully opened until the cement in the cement meter 53 reaches 90% of the predetermined amount, and the remaining 10% closes the valve by 2/3, In the open state, the cement is supplied to the cement meter 53. This shortens the time for supplying cement to the cement weighing machine 53 and improves the accuracy of cement weighing. The valve opening and the opening changing point are merely examples, and can be changed as appropriate.

  As shown in FIG. 1, a water tank 61 that constitutes a part of the water supply unit 6 (not shown in FIGS. 2 and 3) is provided in the vicinity of the steel frame 11. The water supply unit 6 includes a water tank 61, a water head tank 62 that is provided in the upper part of the steel frame 11 and temporarily stores water, and a water meter 63 that measures water supplied to the mixing mixer 21. Yes. A water pipe 64 for supplying water from the water tank 61 to the water head tank 62 is provided between the water tank 61 and the water head tank 62. A pump 65 is connected to the water pipe 64.

  The water meter 63 constitutes a water supply device that measures water and supplies it to the mixing mixer 21. The water meter 63 is configured to determine the amount of water to be supplied according to the amount of aggregate supplied to the mixing mixer 21. Specifically, the water meter 63 receives an aggregate supply amount signal from a control device (not shown) provided in the weighing hopper 38, and the aggregate and water have a desired blending ratio. Thus, the water supply amount is determined so that the cement of the supply amount is supplied to the mixing mixer 21.

  A two-stage cut-off valve 67 is provided between the water meter 63 and the water head tank 62. The on-off valve 67 has two types of butterfly valves 67a and 67b having different flow rates. For example, the larger butterfly valve 67a has an inner diameter of 125 mm and the smaller butterfly valve 67b has an inner diameter of 50 mm. . The two-stage cut type on-off valve 67 opens only the larger butterfly valve 67a until the water in the water meter 63 reaches 90% of the predetermined amount, and the remaining 10% is the larger butterfly valve. 67a is closed and water is supplied only by the smaller butterfly valve 67b. As a result, the time for supplying water to the water meter 63 is shortened and the accuracy of water metering is improved. Note that the size and opening / closing change points of the butterfly valves 67a and 67b are examples, and can be changed as appropriate.

  Next, the operation of the kneading apparatus 1 will be described while explaining the work process of kneading the CSC material using the kneading apparatus 1 according to the above configuration.

  First, rocky materials such as riverbed gravel that will be aggregated are collected around the construction site by a drilling machine (not shown) such as a backhoe. As shown in FIGS. 1 and 2, the collected aggregate is loaded on a transport vehicle 7 such as a dump truck, transported to the input hopper 31, and input to the input hopper 31. When uniformity of the particle size of the aggregate is required, the aggregate is applied to the vibrating screen before the charging into the charging hopper 31 and the classification of the aggregate is adjusted.

  The charged aggregate is sent to the belt feeder 33, where it is arranged in a predetermined layer thickness and supplied to the weighing conveyor 37 in a fixed amount. The weighing conveyor 37 operates at a conveyance speed of 90 m / min, and supplies the aggregate to the rotating chute 41 at a high speed.

  The rotating chute 41 (movable chute 39) is rotated to a predetermined position and stopped so that the aggregate is put into one weighing hopper 38. At this time, by configuring the movable chute 39 with the rotating chute 41, the rotating mechanism that rotates the rotating chute 41 is disposed at a position away from the chute 45 portion where the aggregate collides. Therefore, vibration and impact due to the collision of the aggregate are not easily transmitted to the rotating mechanism that is a movable part, and the life of the movable chute 39 is increased compared to a chute having a movable flow path selection plate below the chute. Can be achieved.

  When the aggregate in the weighing hopper 38 approaches a predetermined amount (reach 90% of the predetermined amount), a sensor (not shown) detects this and sends a signal to the weighing conveyor 37. In response to this, the weighing conveyor 37 reduces the conveying speed to 45 m / min and supplies the aggregate to the weighing hopper 38 at a low speed. By doing in this way, the increase speed of the aggregate in the measurement hopper 38 is restrict | limited, the supply of aggregate does not exceed predetermined amount, and the measurement precision of aggregate can be improved. Further, since the aggregate is supplied at a high speed at a constant rate until the aggregate in the weighing hopper 38 reaches 90%, the supply time can be shortened. Aggregation of the aggregate by the weighing hopper 38 is automatically performed to an amount determined in advance.

  When the aggregate in the weighing hopper 38 reaches a predetermined amount, the rotation chute 41 is rotated by a predetermined angle (90 degrees), and the supply of the aggregate to the other weighing hoppers 38 is started. At the same time, the charging port 47 of the weighing hopper 38 is opened, and the aggregate is dropped into the mixing mixer 21 and charged. Furthermore, the conveyance speed of the weighing conveyor 37 is returned to 90 m / min.

  In this way, the aggregate weighed by the weighing hopper 38 is supplied to the mixing mixer 21. Since the aggregate is metered by the belt feeder 33 and then weighed further by the weighing hopper 38, the accuracy is measured. Can be greatly improved. Furthermore, since the aggregate supply speed immediately before the end of the measurement is lowered by the inverter type measurement conveyor 37, the measurement accuracy can be further improved.

  Further, since the fixed amount is supplied by the belt feeder 33, the weighing by the weighing hopper 38 can be performed in a certain time (for example, 25 seconds).

  Here, when the aggregate is supplied from the weighing hopper 38 to the mixing mixer 21, the supply amount is transmitted to the cement supply unit 5 and the water supply unit 6, and the supply amount of cement and water depends on the supply amount. The determined amounts of cement and water are respectively supplied to the mixing mixer 21. At this time, since the aggregate is metered by the metering hopper 38 in a predetermined amount, the cement and water supply amount is usually constant. However, even if the aggregate supply amount is deviated, the aggregate is deviated. The supply amount of cement and water can be determined according to the supply amount. As described above, the ratio of cement and water to aggregate can be reliably determined by determining the supply amount of cement and water with relatively high measurement accuracy based on the supply amount of aggregate whose supply amount is likely to fluctuate. Value. That is, it is possible to accurately supply cement and water in a supply amount determined with respect to the aggregate supply amount. Therefore, the quality of the produced CSG material can be improved.

  Further, since cement and water are metered using the two-stage cut-type butterfly valve 58 and the on-off valve 67, it is possible to perform cement supply and water supply with very high supply amount accuracy. The quality can be greatly improved. In addition, since a large amount of high-speed supply is performed until the cement or water in each of the weighing machines 53 and 63 approaches a predetermined amount, the time for measuring cement and water can be shortened.

  The supplied aggregate, cement and water are kneaded in the mixing mixer 21 for a predetermined time (for example, 30 seconds) at an accurate blending ratio. Here, the kneading is started at the same time as the charging of the aggregate (for example, 15 seconds) is started. Cement supply (for example, 4 seconds) and water supply (for example, 10 seconds) are performed with a slight delay (for example, a few seconds later) from the start of charging the aggregate. Since the mixing mixer 21 is constituted by a biaxial mixer 23 having a pair of spiral arms 22, 22, the material to be kneaded can be efficiently kneaded. Thereby, the kneading time can be shortened, and the production efficiency of the CSG material can be greatly improved.

  Furthermore, since the mixing mixer 21 is provided with a camera so that the internal kneading state can be monitored, in the unlikely event that the mixing state is not good or the mixing mixer 21 has failed or stopped. Can discover it.

  When the kneading in the mixing mixer 21 is completed, one batch of the kneaded CSG material is discharged to the lower collecting hopper 81. Since the collection hopper 81 has a storage amount equivalent to the loadable amount of the transport vehicle 7 (for example, two batches of the mixing mixer 21), the CSG material is stored up to the loadable amount of the transport vehicle 7. It can be loaded into the transport vehicle 7 by a single carry-out operation. Therefore, the transport vehicle 7 only has to wait for the time of the unloading work in the stop space 12, and the transport efficiency can be improved. The kneading capacity for each batch in the mixing mixer 21 can be changed as appropriate. If the kneading capacity for each batch is determined according to the transport capacity (loading amount) of the transport vehicle 7, the transport vehicle 7 Even in the case of a change, it is possible to provide a CSG material that matches the transport capacity.

  In addition, since the collecting hopper 81 is provided with a pinch gate (concrete discharge regulating valve) 82, it is easy to switch between discharging and stopping for the powdered conveyance object.

  When the discharging of the CSG material from the mixing mixer 21 to the collecting hopper 81 is completed, the aggregate is supplied from the other weighing hopper 38 into the mixing mixer 21. If it does in this way, the mixing mixer 21 can be operated continuously and kneading | mixing efficiency will improve significantly.

  In the kneading apparatus 1 according to the present embodiment, it takes 7 seconds to discharge the aggregate from the mixing mixer 21 to the collecting hopper 81, and 3 seconds to close the gate. Therefore, the operation cycle of the mixing mixer 21 is 30 seconds for kneading, 10 seconds for discharging and closing the gate, and 40 seconds. On the other hand, the operation cycle of the weighing hopper 38 is 40 seconds, 25 seconds for weighing and 15 seconds for releasing aggregate. Thus, the operation cycle of the mixing mixer 21 and the operation cycle of the weighing hopper 38 are the same time. Therefore, the discharge of the CSG material from the mixing mixer 21 is completed and the gate is closed, and at the same time, the supply of the next aggregate can be started immediately. As described above, when the operation cycle of the mixing mixer 21 and the operation cycle of the weighing hopper 38 are the same time, it is sufficient that at least two weighing hoppers 38 are provided.

In addition, as long as the operation cycle of the weighing hopper 38 is shorter than the operation cycle of the mixing mixer 21, each operation cycle may not necessarily be the same. When the operation cycle of the weighing hopper 38 is short, the quantity of the weighing hopper 38 is increased to more than 2, and the aggregate waits at the plurality of weighing hoppers 38 while kneading by the mixing mixer 21.

  As described above, according to the kneading apparatus 1 having the above-described configuration, after the weighing of the aggregate with one weighing hopper 38 is completed, the rotating chute 41 is immediately rotated to turn the bone to the other weighing hopper 38. Since the supply of the material can be started, the aggregate can be supplied continuously. And since the aggregate to be kneaded next can be measured while kneading the material to be kneaded by the mixing mixer 21, time loss can be eliminated, and the production efficiency of the CSG material can be greatly improved. .

  In addition, after the kneading of the mixing mixer 21 is finished and the discharge to the collecting hopper 81 is finished, the weighing by the next weighing hopper 38 is completed, and the supply of the aggregate and the like to the mixing mixer 21 can be started immediately. Therefore, continuous work is possible even with the mixing mixer 21, and no time loss occurs. Therefore, no loss occurs in each part of the kneading apparatus 1, and very efficient production of the CSG material becomes possible.

  Further, since the CSG material to be manufactured is kneaded by the biaxial mixer 23 having a high mixing effect, the CSG material is sufficiently kneaded, and the generated strength of the CSG material can be secured and the generated strength can be made uniform. It can be expressed and the variation can be eliminated. Therefore, the quality accuracy of the produced CSG material can be greatly increased. The effect of being able to enhance this mixing effect is not limited to CSG materials, but improves the quality accuracy of products even when producing concrete materials by mixing ordinary aggregates made of crushed stone or gravel, cement and water. Contributes to

  In addition, since the kneading apparatus 1 kneads aggregate, cement, and water with the mixing mixer 21, the degree of kneading of these can be easily evaluated by measuring the kneading time. it can.

  Since the kneading apparatus 1 having the above configuration is lighter than a conventional concrete kneading apparatus, temporary costs such as transportation cost, assembly cost, and removal cost of the kneading apparatus 1 are low. Furthermore, the kneading apparatus 1 can be reused at another site by providing it after use.

  Further, the mixing mixer 21 has a larger kneading capacity as compared with a conventional self-propelled soil improvement machine, and can produce, for example, 200 cubic meters of CSG material per hour.

  As mentioned above, although the form for implementing this invention was demonstrated, this invention is not limited to the said embodiment, In the range which does not deviate from the meaning of this invention, a design change is possible suitably. For example, in the present embodiment, the kneading apparatus 1 for producing CSG material by kneading aggregate, cement and water collected from around the site has been described as an example. It can also be used as a kneading device that produces concrete material by kneading aggregate, cement and water, kneading excavation and cement, or kneading sludge and solidifying agent such as cement. be able to.

  Further, the mixing mixer 21 is not limited to the biaxial mixer 23, and may be a multiaxial mixer.

It is the equipment flowchart which showed the best form for implementing the kneading apparatus which concerns on this invention. It is the side view which showed the best form for implementing the kneading apparatus which concerns on this invention. It is the front view which showed the best form for implementing the kneading apparatus which concerns on this invention. It is the perspective view which showed the measurement hopper and rotary chute of the kneading apparatus which concerns on this invention. It is the perspective view which showed the mixing mixer of the kneading apparatus which concerns on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Kneading apparatus 21 Mixer 22 Spiral arm 23 Two-shaft mixer 33 Belt feeder 37 Weighing conveyor 38 Weighing hopper 39 Movable chute 41 Rotating chute 43 Rotating body 44 Rotating shaft 45 Chute (flow path)
81 Collective hopper

Claims (8)

A mixing mixer that mixes aggregates such as gravel, crushed stone, gravel, etc., earth and sand, sludge, etc., and a material to be kneaded composed of cement and water for each batch,
A plurality of weighing hoppers that store a predetermined amount of the aggregate and supply it to the mixing mixer;
A kneading apparatus comprising: a movable chute that selectively inputs the aggregate into the plurality of weighing hoppers. The kneading apparatus according to claim 1, wherein a belt feeder is provided upstream of the movable chute for supplying the aggregate to the measuring hopper. Between the belt feeder and the movable chute, a weighing conveyor capable of controlling the conveyance speed is provided,
The kneading apparatus according to claim 1 or 2, wherein when the aggregate in the weighing hopper approaches a predetermined amount, the conveying speed of the weighing conveyor is decreased. The movable chute is a rotary chute having a flow path inclined from a rotation axis of a rotating body, and changing the dropping position of the aggregate by rotating the rotating body. The kneading apparatus according to any one of claims 3 to 4. The kneading apparatus according to any one of claims 1 to 4, wherein a collecting hopper for storing a plurality of batches of materials to be kneaded is provided downstream of the mixing mixer. The kneading apparatus according to any one of claims 1 to 5, wherein the mixing mixer is a biaxial mixer including two spiral arms arranged in parallel. The cement supply device for supplying cement to the mixing mixer is configured to determine a supply cement amount according to an amount of aggregate supplied to the mixing mixer. The kneading apparatus according to any one of 6. The water supply device for supplying water to the mixing mixer is configured to determine the amount of water to be supplied according to the amount of aggregate supplied to the mixing mixer. The kneading apparatus according to any one of the above.

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