JPH06312806A - Device for evening quantity of sludge inside of storing pit - Google Patents

Abstract

PURPOSE:To automatically even the height of the sludge inside of a storing pit by providing a means for stopping the operation of a sludge moving means in the case where the maximum value of sludge height detected values becomes nearly equal to the mean value. CONSTITUTION:A sludge height sensor 11, which is fitted to the upper part of a bucket 4 so as to be projected in the lateral direction, sends the ultrasonic wave toward a storing pit 1 and catches the ultrasonic wave reflected by the sludge 2. The storing pit 1 is divided into plural blocks previously, and the sensor 11 detects the height of the sludge 2 of these blocks. A control device 8 has a memory for storing the sludge height detected value from the sensor 11 and the block, a height judging unit for judging largeness of the sludge height detected value stored in this memory, and a mean value computer for computing the mean value area of the sludge height detected value stored in the memory. The control device 13 falls the sludge with the bucket 4 at an area, of which sludge height detected value is minimum, and stops the operation when the sludge height detected value arrives the mean value.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention equalizes the height of sludge by catching sludge in a predetermined area in a storage pit with a bucket of a bucket crane and moving it up to another area to drop sludge. The present invention relates to a sludge amount equalizing device in a storage pit.

[0002]

2. Description of the Related Art Sewage sludge generated from a sewage treatment plant is dehydrated and incinerated. However, in a treatment plant that does not have an incinerator, the dehydrated sludge is transported to an incineration facility by a truck and treated. . The transported sludge after dehydration is accumulated in the storage pit of the treatment facility.

As shown in FIG. 6, the sludge 2 accumulated in the storage pit 1 is conveyed to an incinerator hopper 5 by a bucket 4 of a bucket crane 3 and then incinerated. But,
The storage pit 1 has a sludge carry-in port 7 such as a truck 6.
Since there is only one location, the sludge 2 in the storage pit 1 is piled up on the carry-in port 7 side, and there is only a little sludge on the opposite side. Therefore, a person operates the bucket crane 3 to move the sludge 2 with the bucket 4, thereby making the height of the sludge 2 in the storage pit 1 uniform.

[0004]

However, in order to make the sludge height in the conventional storage pit uniform, a person must work in a bad environment in the storage pit, and However, there is a problem that labor costs are required.

It is an object of the present invention to provide a sludge amount equalizing device in a storage pit which can automatically equalize the height of sludge in the storage pit.

[0006]

According to the present invention, the height of sludge is obtained by catching sludge in a predetermined area in a storage pit with a bucket of a bucket crane, moving up, moving to another area, and dropping sludge. In the sludge amount equalizing device in the storage pit for equalizing the sludge, sludge height detecting means for detecting the height of sludge in a plurality of areas in the storage pit, and sludge height detected by the sludge height detecting means. Height and area storage means for storing the height detection value and the area where these sludge height detection values are obtained, and a height for determining the magnitude of the sludge height detection value stored in this height and area storage means. And a mean value calculation means for calculating an average value of the sludge height detection values stored in the height and area storage means,
A sludge moving means for grasping sludge in an area having the maximum sludge height with a bucket and then moving it to an area having the minimum sludge height and dropping sludge in the bucket, and grasping sludge by the sludge moving means. The sludge height of the taken area is detected, and the sludge height of the area where the sludge is dropped by the sludge means is detected, and these new sludge height detection values are stored in the height and area storage means. A height detection value updating means for inserting, and a means for stopping the operation of the sludge moving means when the maximum value of the sludge height detection value after the update by the height detection value updating means becomes substantially equal to the average value. An apparatus for equalizing the amount of sludge in a storage pit is provided, which is characterized by comprising:

[0007]

In the present invention, the sludge heights in a plurality of areas within the storage pit are detected, and the sludge height detection values and their average values are stored, and the areas where the sludge height detection values are maximum are stored. The sludge is caught by the bucket of the bucket crane and dropped in the area where the sludge height detection value is the minimum, and the operation is stopped when the maximum sludge height detection value reaches almost the average value.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing an outline of one embodiment of the present invention. The embodiment of FIG. 1 has the same components as the reference numbers of FIG. In the embodiment shown in FIG. 1, a control device 8 for controlling the operation of the bucket crane 3 is provided. An operation panel 9 for operating the control device 8
It is provided near the sludge carry-in port 7 of the exterior body 10 provided so as to cover the storage pit 1.

As shown in FIGS. 1 and 2, a sludge height sensor 11 is provided on the upper portion of the bucket 4 so as to project laterally.
Is attached. The sludge height sensor 11 sends an ultrasonic wave toward the storage pit 1 and catches an ultrasonic wave reflected from the sludge 2. The sensor 11 detects the ultrasonic wave in advance in the storage pit 1 as shown in FIG. Multiple areas (coordinates)
The height of the sludge 2 in these areas is detected. Although not shown, the control device 8 has a memory for storing the sludge height detection value and the area from the sludge height sensor 11, and a height for determining the magnitude of the sludge height detection value stored in this memory. It has a judging device and an average value calculator for calculating an average value range of the sludge height detection values stored in the memory.

In the embodiment constructed as described above, the sludge is automatically re-transferred by the bucket crane when the night truck is not carried in properly. Therefore, as shown in FIG. 3, the storage pit 1 is divided into an x-axis and a y-axis, and n coordinates are determined. Next, n levels (sludge height) are measured and stored by the sludge height sensor 11 including an ultrasonic level meter attached to the bucket 4. At this time, the crane is moved in parallel. As for the measurement order, the measurement is performed sequentially from the smallest coordinate. Then, the recognition of the measurement position is determined by using the following formula in which the total moving time of the crane and the bucket is divided by n.

After the measurement of ΔTx = Tx / n y-axis direction ΔTy = Ty / n n levels is completed, the average level is calculated (x
_{If the (1} , y ₁ ) coordinate is z ₁ , the average level α can be obtained from the following equation.

Α = (z1 + z2 + Z3 + ... + Zn) / n After the level is calculated as described above, the sludge transshipment operation is performed as shown in the flowchart of FIG. By performing this sludge transshipment operation, the operation of equalizing the sludge amount in the storage pit 1 is performed as shown in the flowchart of FIG.

Next, the operation of the sludge amount equalizing device in the storage pit will be described with reference to FIG.

First, in step S1, the sludge height sensor 11 detects the sludge height of all areas. Next, in step S2, all the sludge height detection values LM and areas are stored in the memory, and in step S3, the average value range α (average value of constant width) of LM is calculated and stored in the memory. In step S4, the bucket 4 is moved to the area of the maximum value of LM, and
5, the bucket 4 is lowered, and then the sludge 2 is grabbed by the bucket 4 in step S6. Next, the bucket 4 is raised and stopped, and then the sludge height sensor 11 detects the sludge height (steps S7, S8, S9).

Next, in step S10, the sludge height detection value L
After storing M and the area in the memory and updating the stored contents, the bucket 4 is set in the area of the minimum value of LM in step S11.
Is moved to open the bucket 4 to drop sludge in step S12. After that, in step S13, the sludge height is detected by the sludge height sensor 11, and in step S14, the sludge height detection value and the area are stored in the memory and the stored contents are updated. Next, in step S15, it is determined whether the maximum value of LM is larger than α. If the maximum value of LM is larger than α, the process returns to step S4. If the maximum value of LM is not larger than α, the operation ends.

[0016]

As described above, according to the present invention, there is an advantage that the height of sludge in the storage pit can be automatically made uniform. As a result, it is not necessary for a person to work in a bad environment in the storage pit, and labor costs are not required.

[Brief description of drawings]

FIG. 1 is a schematic view showing an outline of one embodiment of the present invention.

FIG. 2 is a front view showing a bucket and a sludge height sensor in the embodiment of FIG.

FIG. 3 is a diagram for explaining an area detected by a sludge height sensor in the embodiment of FIG.

FIG. 4 is a flow chart for explaining the operation of the embodiment of FIG.

5 is a flow chart for explaining a more detailed operation of the embodiment of FIG.

FIG. 6 is a schematic view showing a device for uniformizing sludge in a conventional storage pit.

[Explanation of symbols]

 1 ... Storage pit 2 ... Sludge 3 ... Bucket crane 4 ... Bucket 8 ... Control device 11 ... Sludge height sensor

Claims (1)

[Claims] 1. A sludge in a storage pit for equalizing the height of sludge by catching sludge in a predetermined area in the storage pit with a bucket of a bucket crane, ascending, moving to another area, and dropping sludge In the quantity equalizing device, sludge height detection means for detecting the height of sludge in a plurality of areas in the storage pit, sludge height detection values detected by the sludge height detection means, and these sludge heights. Height and area storage means for storing the area where the detection value is obtained, height determination means for determining the size of the sludge height detection value stored in the height and area storage means, and the height and area Average value calculation means for calculating the average value of the sludge height detection values stored in the area storage means, and the sludge height is the minimum after the sludge in the area where the sludge height is the maximum is grabbed by the bucket and raised. Move to an area that is Sludge moving means for moving the bucket to drop sludge, and detecting the sludge height of the area where the sludge was caught by the sludge moving means and the sludge height of the area where the sludge was dropped by the sludge moving means. Height detection value update means for detecting and inserting these new sludge height detection values in the height and area storage means, and the maximum value of the sludge height detection value after the update by the height detection value update means And a means for stopping the operation of the sludge moving means when the value becomes substantially equal to the average value, the sludge amount equalizing apparatus in the storage pit.