JP2010269247A - Apparatus for treating soil - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an apparatus for treating soil capable of continuously treating soil regardless of fluidity of soil. <P>SOLUTION: The apparatus for treating soil provided with a tank 1 capable of discharging input soil from a gate 2, a conveyance device 3 for conveying soil from the tank 1 via the gate 2 and a spraying device 4 for spraying chemicals on soil conveyed by the conveyance device 3 and after passage of the gate includes: opening adjustment means 5 for adjusting the opening of the gate 2; spraying amount adjustment means 6 for adjusting the chemicals spraying amount on the spraying device; and measuring means 7 for measuring the weight of soil in the tank 1 and on the conveyance device 3. In the apparatus for treating soil, the weight of soil per hour discharged from the gate 2 is estimated on the basis of the weight of soil measured by the measuring means 7 to control both the gate opening and the chemicals spraying amount on the basis of the estimated weight of soil per hour. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an improvement of a soil treatment apparatus.

  The soil treatment includes various treatments such as mud treatment, insolubilization treatment, and soil improvement treatment. For example, mud treatment treats excavated soil (generally referred to as construction sludge) fluidized by mud so that it is convenient for discharging excavated soil in methods such as the muddy water shield method and continuous underground wall method. This is a process for reducing the fluidity of excavated soil having a high water content ratio and poor self-hardness and returning it to a reusable state. The insolubilization process is a process in which an adsorbent or the like is mixed into the contaminated soil so that contaminants such as heavy metals do not melt out.

  In order to perform the mud treatment at the construction site and backfill the treated soil, for example, a solidification material is put into the mud stored in a container and is stabilized by stirring. In order to improve the efficiency of this process, a processing apparatus having a stirring member that can stir mud while introducing a solidifying material has been developed (for example, see Patent Document 1).

  There is also a proposal for a treatment vehicle aimed at insolubilization treatment at the construction site. In this treatment vehicle, a roll screen that screens excavated soil into soil and stone, and chemicals etc. are mixed into the soil. The truck is equipped with a mixer, a belt conveyor that transports the soil that has passed through the roll screen to the mixer, and a feeder that supplies an insolubilizing agent to the soil transported by the belt conveyor, and is discharged from the mixer. A mixed screen for re-sieving the treated soil to be screened and another belt conveyor that transports the screen under the mixer screen to the ground are loaded onto the truck bed.

  And this processing vehicle performs the above-mentioned process by unloading and developing a mixer screen and a belt conveyor from a truck bed at a construction site (see Patent Document 2).

Japanese Patent Laid-Open No. 08-1195 Japanese Patent Laid-Open No. 11-140904 (Embodiment of the Invention, FIG. 2)

  In the above-described processing apparatus, only the mud stored in the container is processed, so the mud cannot be automatically processed continuously, and insolubilization processing, soil improvement processing, etc. Not suitable for other processing.

  On the other hand, in the treatment vehicle, it is possible to continuously perform insolubilization treatment while supplying the excavated soil, but the fluid excavated soil is only supplied by quantitative supply of the insolubilizer. It is not suitable for processing.

  Therefore, the present invention was devised to improve the above-described problems, and an object of the present invention is to provide a soil treatment apparatus capable of continuously treating soil regardless of the fluidity of the soil. It is to be.

  In order to achieve the above-described object, the problem solving means in the present invention includes a tank capable of discharging the charged soil from the gate, a transport apparatus for transporting the soil from the tank through the gate, and a transport apparatus. In a soil treatment apparatus equipped with a spraying device for spraying chemicals on the soil after passing through the gate, an opening adjusting means for adjusting the opening of the gate, a spraying amount adjusting means for adjusting a chemical spraying amount in the spraying device, Measuring means for measuring the weight of the soil on the tank and the transfer device, estimating the weight of the soil per hour discharged from the gate based on the weight of the soil measured by the measuring means, It is characterized by controlling both the gate opening and the chemical spraying amount based on the weight of the soil.

  According to the soil treatment apparatus of the present invention, a tank capable of discharging the input soil from the gate, a transport device for transporting the soil from the tank through the gate, and the soil after passing through the gate transported by the transport device A spraying device for spraying a medicine, an opening adjusting means for adjusting the opening of the gate, a spraying amount adjusting means for adjusting the spraying amount of the medicine in the spraying device, and a measuring means for measuring the weight of the soil on the tank and the transport device The soil weight per hour discharged from the gate is estimated based on the soil weight measured by the measuring means, and the gate opening degree and the chemical spray amount are estimated based on the estimated soil weight per time. Since both are controlled, the soil can be treated by automatically spraying a chemical amount suitable for the moisture content regardless of the moisture content of the soil, and only the treatment that stabilizes the fluidized soil with a high moisture content. Therefore, insolubilization treatment and soil improvement of non-fluid soil Various processes such as treatment, can be performed continuously.

It is the schematic of the soil treatment apparatus in one embodiment. It is detail drawing of the gate of the soil treatment apparatus in one embodiment. It is a control block diagram of the soil treatment apparatus in one embodiment.

  The present invention will be described below based on the illustrated embodiment. As shown in FIG. 1, the soil treatment apparatus in one embodiment includes a tank 1 capable of discharging the input soil from the gate 2, a transport apparatus 3 for transporting the soil from the tank 1 through the gate 2, A spraying device 4 for spraying the drug on the soil after passing through the gate transported by the transport device 3, an actuator 5 as an opening adjusting means for adjusting the opening of the gate 2, and a drug spraying amount in the spraying device 4 are adjusted. Spreading amount adjusting means 6, weight sensor 7 as measuring means for measuring the weight of the soil on the tank 1 and the transfer device 3, and the soil per time discharged from the gate 2 from the weight of the soil measured by the weight sensor 7 A controller 8 that estimates the weight and controls the opening degree adjusting means 5 and the spray amount adjusting means 6 is provided.

  Hereinafter, each part will be described in detail. The tank 1 has a box shape with four walls and opened at the top and bottom. To facilitate the introduction of soil from the opened top, the opening area on the upper side is larger than the opening area on the lower side. It is set and the hopper shape is set.

  However, the wall 1a on which the gate 2 is provided is not inclined, and the gate 2 moves in the up and down direction in FIG. 1 by slidingly contacting the wall 1a with a notch 2a provided upward from the lowest end of the wall 1a. Is provided with an acceptable shutter 2b. The degree of overlap with the notch 2a can be changed by moving the shutter 2b up and down. When the notch 2a is completely closed with the shutter 2b, the gate 2 is closed, When the shutter 2b is moved upward from the notch 2a, the gate 2 is fully opened.

  In the case of this embodiment, a linear motion type actuator 5 fixed to the upper side of the wall 1a in FIG. 1 is provided, and the shutter 2b is moved up and down using the actuator 5 to open and close the gate 2. Further, the opening degree of the gate 2 can be adjusted by adjusting the amount of lap between the shutter 2b and the notch 2a. The drive source of the actuator 5 may be a hydraulic pressure or a pneumatic pressure in addition to a motor or a linear motor. Therefore, in this case, the actuator 5 is used as the opening adjustment means. However, the opening adjustment means is not limited to this as long as the opening of the gate 2 can be adjusted.

  As shown in FIG. 2, the shutter 2b includes a first partition 2c that has a wide width and directly opens and closes the notch 2a, and a small notch 2d that is narrower than the notch 2a provided upward from the lower end of the first partition 2c. And a second partition 2e that is slidably contacted with the first partition 2c and is movable in the vertical direction and opens and closes the small notch 2d, and the actuator 5 is connected to the second partition 2e. Further, when the second partition 2e moves upward in FIG. 2 with respect to the first partition 2c and the small notch 2d is fully opened, the upward movement of the second partition 2e relative to the first partition 2c is restricted. It has become. Accordingly, when the second partition 2e is driven upward from the state in which the small notch 2d is closed, and the second partition 2e is further driven upward after the second partition 2e fully opens the small notch 2d, the second partition 2e is driven upward. Since the upward movement of the second partition wall 2e is restricted, the first partition wall 2c moves upward together with the second partition wall 2e to open the notch 2a.

  By configuring the shutter 2b in this way, not only can the opening area of the gate 2 be increased in a state where the notch 2a is opened by the first partition 2c, but at the beginning of opening of the gate 2, the width is smaller than that of the notch 2a. Since the opening degree of the gate 2 can be adjusted by the second partition 2e in the notch 2d, the opening area of the gate 2 at the beginning of opening of the gate 2 can be finely adjusted.

  Returning, the opening part of the lower part of the above-mentioned tank 1 is obstruct | occluded by the conveying apparatus 3, and the conveying apparatus 3 is used as the belt conveyor in this case. A side wall 3a is provided at the side of the transfer device 3 so that the soil on the transfer device 3 does not fall down from the side. In a state where the gate 2 is opened, the transport device 3 formed of the belt conveyor is driven, so that the soil put into the tank 1 and stored can be transported to the outside through the gate 2. ing. Further, a belt-like rubber seal 9 is attached to the lower end of the tank 1 except for the wall 1a. The rubber seal 9 seals between the tank 1 and the transfer device 3, and soil having a high water content is stored in the tank 1. Even if thrown in, the soil is prevented from leaking outside from the gate 2. When the gate 2 is opened, the transfer device 3 rotates the belt at a constant speed to transfer the soil from the tank 1 to the outside.

  The tank 1 and the transfer device 3 configured as described above and including the actuator 5 are mounted on the base B by four legs 10. A load cell 7a is interposed in the middle of each leg 10, and the load sensor 7a constitutes the weight sensor 7. In this embodiment, since the weight sensor 7 as a measuring means is interposed in the leg 10 that supports the tank 1 and the transfer device 3, the weight including the tank 1, the actuator 5 and the transfer device 3 is measured. However, the weight of the tank 1, the actuator 5, and the transfer device 3 may be corrected by measuring the weight before putting the soil. This correction may be performed on the weight sensor 7 side or may be performed on the controller 8 side described later. In addition to the load cell, a sensor capable of measuring a strain gauge or other weight can be used as the measuring means.

  Subsequently, the spraying device 4 has a tank 4a for storing medicine, and a spraying port 4b that is provided so as to project sideways from the bottom of the tank 4a and sprays the medicine from above the soil that is being transported by the transporting device 3. And is configured. Further, in this case, the spray amount adjusting means 6 for adjusting the drug spray amount is fixed to the side of the tank 4a with the screw shaft 6a rotatably mounted in the vicinity of the bottom of the tank 4a. A screw conveyor is provided with a rotationally driven motor 6b, and the drug in the tank 4a can be conveyed to the spray port 4b by rotationally driving the screw shaft 6a. The amount of medicine conveyed to the spray port 4b can be adjusted according to the rotational speed of the screw shaft 6a, and the amount of medicine sprayed from the spray port 4b to the soil by controlling the rotational speed of the motor 6b. Can be adjusted.

  The spraying device 4 and the spraying amount adjusting means 6 are mounted on the base B by four legs 11 like the tank 1 and the transport device 3.

  And this soil treatment apparatus opened the gate 2 in the soil thrown into the tank 1, carried it out of the tank 1 by the transport device 3, and installed the medicine in the spraying device 4 above the transport device 3. Sprinkling is performed on the soil being transported on the transport device 3 from the spray port 4b, and finally, the medicine and the soil are introduced into the stirrer 12 from the tip of the transport device 3. By stirring the chemical and the soil with the agitator 12, the soil and the chemical are mixed evenly and discharged. A chemical that matches the soil treatment is selected. For example, if a treatment for solidifying fluidized soil with a high water content ratio is performed, a chemical containing cement or lime may be used, and an insolubilization treatment is performed. In such a case, a chemical suitable for contaminated soil such as ferrous sulfate or sodium sulfide may be used.

  The controller 8 estimates the weight of the soil per time discharged from the gate 2 from the weight of the soil measured by the weight sensor 7 and controls the actuator 5 and the spray amount adjusting means 6.

  As shown in FIG. 3, the controller 8 controls the actuator 5 and the application amount adjusting means 6, and the weight of the soil per time discharged from the gate 2 based on the weight of the soil measured by the weight sensor 7. The weight of the soil to be processed per hour from the moisture content of the soil, the target value calculating unit 8b for determining the addition ratio of the chemical to the weight of the soil, and the weight of the soil to be processed A gate control unit 8c that performs proportional-integral control by performing proportional-integral compensation based on a control deviation from the estimated soil weight per hour, and a target application amount suitable for the estimated soil weight per hour. And a spray amount control unit 8d for performing proportional integral control on the spray amount adjusting means 6 by performing proportional integral compensation based on a control deviation between the actual spray amount and the medicine spray amount.

  The controller 8 is a hardware resource (not shown), such as a CPU (Central Processing Unit), a main storage device such as a RAM (Random Access Memory) that provides a storage area for the arithmetic processing device, A secondary storage device such as a ROM (Read Only Memory) or HD (Hard Disk) in which a program used to perform the processing of each unit of the controller 8 is stored, and the CPU executes the program. Thus, the calculation unit 8a, the target value calculation unit 8b, the gate control unit 8c, and the spray amount control unit 8d are realized, and the weight sensor 7, the actuator 5, and the spray amount adjusting means 6 Interface device and weight sensor There and filters for performing processing such as removing high-frequency noise contained in the signal output, an A / D converter.

  Hereinafter, an example of the process of the controller 8 will be described in accordance with the processes of the calculation unit 8a, the target value calculation unit 8b, the gate control unit 8c, and the spray amount control unit 8d. The calculation unit 8a in the controller 8 takes in the weight of the soil measured by the weight sensor 7 at a predetermined sampling period, and estimates the weight of the soil per time discharged from the gate 2 from the amount of change. The estimation of the weight of the soil per hour will be described in detail. The soil thrown into the tank 1 is transported by the transport device 3 that is discharged from the gate 2 and rotating at a constant speed, and is thrown into the stirrer 12. . On the other hand, what is measured by the weight sensor 7 is the weight of the soil on the tank 1 and the transport device 3. When no new soil is put into the tank 1, the weight of the soil measured by the weight sensor 7 is Decreases over time. By subtracting the soil weight obtained in the next sampling from the soil weight at a certain point in time, the weight of the soil introduced into the stirrer 12 from the tip of the conveying device 3 during the sampling period can be obtained. By dividing the weight of the soil by the sampling period, the weight of the soil per time charged into the stirrer 12 from the tip of the conveying device 3 can be obtained. Actually, the weight of the soil may not be uniform, but the transport device 3 transports the soil at a constant speed, and the weight of the soil per time passing through the gate 2 can be estimated by the above procedure. it can. Further, when additional soil is put into the tank 1, the weight of the soil measured by the weight sensor 7 increases. However, when the weight increases, for example, the weight is not estimated until the weight starts to decrease. Thus, in terms of control, the processing of each unit described later may be executed without updating the soil weight per hour.

  Further, the target value calculation unit 8b calculates the weight of the soil per time to be processed from the moisture content of the soil that is measured in advance by the operator and stored in the storage device of the controller 8, and the moisture content is calculated based on the moisture content. Obtain the rate of drug addition. In this case, the weight of the soil to be treated is determined in advance by the amount of soil treated with respect to the water content ratio, and is uniquely determined by the water content ratio. The amount of soil treated with respect to the water content ratio is stored in advance in the storage device of the controller 8 and can be arbitrarily determined. However, it is better to determine that efficient processing can be performed. A plurality of treatment amounts may be prepared for the water content ratio and may be selected by an operator.

  Separately from this, the target value calculation unit 8b obtains the addition ratio of the drug, which is the amount of drug to be sprayed per unit weight of the soil, from the moisture content of the soil. Since the optimal spraying amount of the medicine varies depending on the moisture content of the soil, the target value calculating unit 8b obtains the addition ratio as the optimal spraying amount of the medicine.

  The gate control unit 8c obtains a control deviation between the weight of the soil discharged from the gate 2 estimated by the calculation unit 8a and the weight of the soil to be processed, and performs proportional-integral compensation on the control deviation so that the actuator 5 The gate opening is controlled by proportional integral control. Therefore, the gate opening is controlled so that the weight of the soil per time discharged from the gate 2 becomes the weight of the soil to be treated. In particular, when the soil moisture content is high and fluidized, when the remaining amount of soil in the tank 1 decreases, the gate is discharged from the gate 2 when the gate opening is constant due to pressure. However, the weight of the soil per hour is automatically adjusted to the weight of the soil to be treated by controlling the gate opening as described above.

  Along with the control of the gate opening in the gate control unit 8c, the spray amount control unit 8d obtains the target spray amount from the estimated weight of the soil discharged from the gate 2 and the above-mentioned drug addition ratio, and sprays the drug. Control volume to target application rate. The actual spraying amount of the medicine can be grasped by the number of revolutions per hour of the motor 6b in the spraying amount adjusting means 6, and proportional integral compensation is performed based on the control deviation between the target spraying amount and the actual medicine spraying amount. Then, proportional-integral control of the motor 6b in the spray amount adjusting means 6 is performed. Therefore, the amount of medicine sprayed is adjusted to the target spraying amount, and in combination with the above gate opening control, the amount of medicine suitable for the weight of soil to be treated is sprayed. Note that proportional integral differential compensation may be performed instead of proportional integral compensation.

  The controller 8 repeats the processes other than the target value calculation unit 8b in the above-described order to control the gate opening and the medicine spray amount.

  Thus, according to the soil treatment apparatus of the present embodiment, the tank 1 that can discharge the input soil from the gate 2, the transport device 3 that transports the soil from the tank 1 through the gate 2, and the transport A spraying device 4 for spraying medicine on the soil after passing through the gate conveyed by the device 3, an opening adjusting means 5 for adjusting the opening of the gate 2, and a spraying amount adjusting means for adjusting the medicine spraying amount in the spraying device 4 6 and measuring means 7 for measuring the weight of the soil on the tank 1 and the transfer device 3, and estimating the weight of the soil per time discharged from the gate 2 based on the weight of the soil measured by the measuring means 7 Since both the gate opening and the chemical application amount are controlled based on the estimated soil weight per hour, the chemical amount suitable for the water content is automatically applied regardless of the soil water content. To stabilize the fluidized soil with a high moisture content Not sense only, various processes insolubilization treatment and soil treatment, etc. soil not in flux, can be continuously performed.

  Furthermore, since the measuring means 7 measures the weight of the soil on the tank 1 and the conveying device 3 and estimates the weight of the soil per time, the estimation of the weight of the soil with particularly high fluidity is possible. As well as being realized, the weight of the soil can be estimated accurately.

  Moreover, the soil weight per hour to be treated and the target spray amount of the chemical are obtained from the water content ratio, and the opening degree is adjusted based on the soil weight per hour to be treated and the estimated soil weight per hour. Since the means is controlled and the chemical spraying amount is controlled based on the target spraying amount, the soil can be processed efficiently.

  This is the end of the description of the embodiment of the present invention, but the scope of the present invention is of course not limited to the details shown or described.

The present invention can be used as a soil treatment apparatus for treating various soils.

DESCRIPTION OF SYMBOLS 1 Tank 1a Wall 2 Gate 2a Notch 2b Shutter 2c 1st partition 2d Small notch 2e 2nd partition 3 Conveying device 3a Side wall 4 Spreading device 4a Tank 4b Spraying port 5 Actuator 6 as opening adjustment means 6 Spreading amount adjustment means 6a Screw shaft 6b Motor 6b
7 Weight sensor 7a as measuring means Load cell 8 Controller 8a Calculation unit 8b Target value calculation unit 8c Gate control unit 8d Spreading amount control unit 9 Rubber seal 10, 11 Leg 12 Stirrer B Base

Claims (3)

A tank capable of discharging the charged soil from the gate, a transport device for transporting the soil from the tank via the gate, and a spraying device for spraying the drug on the soil after passing through the gate transported by the transport device The soil treatment apparatus includes an opening degree adjusting means for adjusting the opening degree of the gate, a spreading amount adjusting means for adjusting the amount of the chemical sprayed in the spreading apparatus, and a measuring means for measuring the weight of the soil on the tank and the transporting device. Estimate the soil weight per hour discharged from the gate based on the soil weight measured by the measuring means, and control both the gate opening and the chemical spray amount based on the estimated soil weight per hour A soil treatment apparatus characterized by: Obtain the weight of soil per hour to be treated from the moisture content and the ratio of the chemical to the weight of the soil, and the opening based on the weight of soil per hour to be treated and the estimated soil weight per hour 2. The soil treatment apparatus according to claim 1, wherein the adjustment unit is controlled to control the amount of the chemical sprayed based on the estimated weight of the soil per hour and the addition ratio. The soil treatment apparatus according to claim 1 or 2, wherein the soil weight per time discharged from the gate is estimated from a temporal change in the soil weight measured by the measuring means.

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