JPH10323513A - Monorake dust removal device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize a rapid treatment of garbage without necessitating large- scale equipment for dehydration treatment by elevating and lowering an elevator on which a rake and a compressing plate are mounted along an elevating and lowering guide laid along a screen. SOLUTION: This device is provided with elevating and lowering guides 10 laid along a screen 2 on the upstream side to the screen 2 in a water path and an elevator 20 doing elevating and lowering action along the elevating and lowering guide 10. On the elevator 20, a rake 30, a compressing plate 20 and an opening/closing driving mechanism 40 for opening and closing the rake 30 and the compressing plate 6 are mounted and between the elevator 20 and the elevating and lowering guide 10, an elevating and lowering driving mechanism 50 for driving the elevator 20 is installed. The rake 30 is for scraping up garbage caught by the screen 2 through a scrapping part whose the tip end edge is formed into a rake to scrape it on the surface of the water and both the end parts of the scraping part are supported at the tips of right and left arms 31. The compression plate 6 is for compressing and dehydrating the garbage scrapped up by the rake 30 and both the end parts hereof are supported at the tips of right and left arms 35.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mono-rake dust remover for scraping underwater dust by a rake along a screen installed in a water channel and collecting it at a sewage treatment plant, for example.

[0002]

2. Description of the Related Art Conventionally, as a mono-rake dust remover of this type, a rake is suspended by a wire, the wire is wound up by a winch, and the rake is raised along a screen to scrape underwater dust onto the water surface. There is a method of raising. Another wire is connected to the rake, and by adjusting the degree of tension of the wire, the rake is opened and closed to scrape dust in water and discharge dust on the water surface.

In the case of this type of suspension type mono-rake dust remover, although its structure is simple, it is not easy to stably raise and lower the rake. During operation, troubles such as the rake rollover may occur.

[0004] In order to solve the above problems, the applicant has recently
An elevating guide was laid along the screen, and an elevator with a rake was moved up and down along the elevating guide. According to this monorake dust remover, the elevator is moved up and down along the lift guide,
The rake can be operated stably.

[0005]

However, in the conventional mono-rake dust remover and the mono-rake dust remover developed by the applicant, when the dust is scraped up from the water channel and collected, a large amount of water is contained in the collected dust. Because
It takes time to dispose of garbage after collection. Also, by the time the garbage disposal is completed, the garbage decays and the odor is generated, which is a factor that causes pollution.

[0006] In order to facilitate the disposal of garbage and to suppress the occurrence of pollution, after collecting the garbage, the garbage is also subjected to a dehydration treatment. Conventionally, a pressing roller, a plunger-type press device, a screw-type press device, and the like have been used for this type of dewatering process. However, equipment for the dewatering process is large and a large installation space is required. Because of this, small-scale treatment plants are not equipped with equipment for dehydration treatment, and in a state containing a large amount of moisture,
The fact is that the collected garbage is being processed.

[0007] The present invention has been made in view of the above problems, and by collecting the scraped-up dust in a dewatered state, large-scale facilities for the dewatering process are not required, and the dust disposal is not required. It is an object of the present invention to provide a monorake dust remover that realizes speeding up.

[0008]

SUMMARY OF THE INVENTION The present invention relates to a monorake dust remover for scavenging underwater dust along a screen installed so as to block a water channel, a lift guide laid along the screen, and a lift guide laid along the screen. A lift that moves up and down along the screen, and the lift is equipped with a rake that scrapes up dust in water along the screen, and a compression plate that compresses and dewaters the dust that has been scraped up by the rake. Become.

According to the second aspect of the present invention, the compression plate is supported by left and right arms, and each arm is provided with a guide roller slidably engaged with a guide guide laid along the screen. The guide comprises a first guide having a track at a constant height along the screen, and a second guide having a track lower than the first guide. Second from the guide part of
By moving to the guide section, the compression plate is closed.

[0010]

[Function] When raising the elevator along the lifting guide,
Dust in the water is scraped up along the screen by the rake, and the scraped up dust is compressed by the compression plate and dehydrated.

In the monorake dust remover according to the second aspect of the present invention, the guide roller slides in a state of being engaged with the guide along the screen, but the guide roller is a second guide from the first guide portion of the guide. When moving to the section, the compression plate performs the closing operation, so that the scraped-up dust is pressurized and dewatered.

[0012]

1 to 4 show the structure of a mono-rake dust remover according to an embodiment of the present invention. The monorake dust remover of the illustrated example is provided in the middle of a waterway 1 such as a sewage treatment plant, and moves underwater while scavenging dust in water along a screen 2 installed so as to block the waterway 1 to a position above the ground S. After being dehydrated, it is discharged to a collecting mechanism 5 such as a container and collected. The arrow P in FIG. 2 indicates the direction of the water flow, and H indicates the water surface.

The screen 2 is for catching dust flowing in the water channel 1 and has a mesh stretched in a rectangular frame corresponding to the cross-sectional shape of the water channel 1. The lower end of the screen 2 is supported on the bottom surface of the water channel 1, and the upper end is fixed to the downstream side of the water channel 1 by a plurality of horizontal support frames 3 at an appropriate angle. Both ends of each support frame 3 are fixed to both side walls 1 a and 1 b of the water channel 1.

The monorake dust remover includes an elevating guide 10 laid along the screen 2 upstream of the screen 2 with respect to the screen 2, and an elevating device 20 that moves up and down along the elevating guide 10. The elevator 20 includes:
Rake 30, compression plate 6, rake 30 and compression plate 6
An opening / closing drive mechanism 40 for opening / closing the device is mounted, and a lifting drive mechanism 50 for driving the lift 20 is provided between the lift 20 and the lift guide 10.

The elevating guide 10 includes a pair of left and right guide rails 11 and an arched guide frame 12 for supporting each guide rail 11. Each guide frame 12
The left and right side plates 12b, 12b are respectively connected to both ends of a plurality of horizontal frames 12a having a length corresponding to the width of the water channel, and the guide rail 11 is fixed to the upper end of each side plate 12b. A rack 51 that constitutes the elevation drive mechanism 50 is fixed to the lower surface of 12a. This lifting guide 1
0 is fixed to the ground S by the fixing bracket 13 at the center of the height and by the struts 14 at the upper end, and the left and right side plates 12b, 12b located in the waterway 1 are both side walls 1a, 1b.

The elevator 20 is provided on both side walls 2 of a machine frame 21.
A vertical guide roller 22A and a horizontal guide roller 22B are respectively attached to the front and rear positions of 1a and 21a, and the guide rollers 22A and 22B are slidably engaged with the left and right guide rails 11 and 11, respectively. Stoppers 15 and 16 are provided at the upper and lower ends of each guide rail 11 to restrict the movement of the elevator 20.

The rake 30 is used for scraping the dust caught by the screen 2 by a rake-like scraping portion 32 having a rake-like tip edge and for scraping the dust onto the water surface.
Both ends of the arm 2 are supported by the tips of left and right rake supporting arms 31, 31. The base end of each arm 31 is rotatably supported by a rotating shaft 44, and a bracket 33 is fixed to a substantially central portion of each arm 31 such that a bracket 33 projects outward. Reference numerals 34, 34 denote support rollers attached to the rake 30, which roll on the screen 2 when ascending.

The compression plate 6 is for compressing and dewatering the dust scraped up by the rake 30. Both ends of the compression plate 6 are provided at the tips of left and right compression plate support arms 35, 35. Supported. Each arm 35 is located outside the respective rake supporting arm 31 and
Is provided directly below and in parallel with each arm 31.
The base end of each arm 35 for supporting the compression plate is connected to the rotation shaft 44. Each arm 35 has a roller holder 36
The guide rollers 37 are respectively supported via.

As shown in FIG. 5, the opening / closing drive mechanism 40 includes a hydraulic cylinder 41 as a drive source and a hydraulic cylinder 4
1 and a power transmission mechanism 42 for transmitting the power to the compression plate 6 and the rake 30 to perform opening and closing operations. The base end of the hydraulic cylinder 41 is pivotally supported by a pivotal support 43 provided on the machine frame 21 so as to freely swing up and down.

The power transmission mechanism 42 has a bearing 4 at both ends.
The hydraulic cylinder 41 includes a rotating shaft 44 rotatably supported by the rotating shafts 44 and 46 and a lever 45 fixed to the rotating shaft 44.
Are pivotally connected via a pin 41B. The hydraulic cylinder 41 has a stroke allowance so as to follow the inclination of the elevator 20 and the change in the angle of the compression plate 6 at the bent portion of the lift guide 10 and constantly applies pressure to the open side and the closed side. .

When the elevator 20 moves upward, hydraulic oil is supplied to the hydraulic cylinder 41 of the opening / closing drive mechanism 40, the rod 41a projects, and the rotary shaft 4 moves via the lever 45.
4 rotates forward. The compression plate 6 is moved to a “standby position” indicated by a solid line in FIG.
Are guided by the screen 2 to be located in the “closed position”, which can be scraped by a solid line in FIG.

On the other hand, when the elevator 20 moves down, when the operating oil is supplied to the hydraulic cylinder 41 of the opening / closing drive mechanism 40 and the rod 41a is retracted, the rotating shaft 44 is reversed via the lever 45, and the compression is performed. The plate 6 is located at the “open position” indicated by the two-dot chain line in FIG. 5 when the guide roller 37 is guided by the guide rail. Since each arm 35 for supporting the compression plate pushes up the rake bracket 33 during the opening operation, the rake 30 is located at the “open position” shown by the two-dot chain line in FIG.

Below the elevating guide 10, a pair of left and right guides 38 are laid along the screen 2. Each of the guides 38 has a groove that is open inside and has a U-shaped cross section.
Guide roller 3 provided on each arm 35 for supporting the compression plate
7 is slidably engaged. The upper end and lower end of each guide 38 are open at the top, with the upper wall removed, so that the guide roller 37 can be disengaged from the guide 38 at the upper end and lower end. I have.

Each of the left and right guides 38 has a first guide portion 3 having a trajectory of a constant height along the screen 2.
8A and a second guide portion 38B having a lower trajectory than the trajectory of the first guide portion 38A. The first guide portion 38A and the second guide portion 38B are continuously connected to each other via a step 38C. Let me do it.

When the guide roller 37 moves from the trajectory of the first guide portion 38A to the trajectory of the second guide portion 38B through the step portion 38C while the elevator 20 is moving upward, the trajectory is changed. The compression plate 6 performs the closing operation as shown in FIG.

2 and 6, reference numeral 19 denotes an apron made of an iron plate connected to the upper end of the screen 2, and the guide roller 37 moves to the second guide portion 38B to close the compression plate 6. When operated, the dust scraped up by the rake 30 is compressed and dehydrated between the compression plate 6 and the apron 19.

A hydraulic motor 52, which is a drive source of the elevation drive mechanism 50, is mounted on the machine frame 21 of the elevator 20. The hydraulic motor 52 is provided along the elevation guide 10 in the length direction. Rack 51 and a sprocket wheel 53 mounted on the motor shaft of the hydraulic motor 52.
Thus, the lifting drive mechanism 50 is configured. The sprocket wheel 53 is meshed with the rack 51, and the lift 20 is moved up and down by the sprocket wheel 53 rotating forward and reverse by the drive of the hydraulic motor 52. The drive source of the lifting drive mechanism 50 is not limited to the hydraulic motor 52, and an electric motor may be used.

Each of the left and right guides 38 is a first guide.
At the upper end of the guide portion 38A, there is a connecting portion pivotally connected by a pivot pin 39. As shown by a chain line in FIG. 2 guide portion 38B and step portion 3
8C can be rotated upward.

The guide drive mechanism 54 uses the hydraulic cylinder 58 as a drive source, and adjusts the drawing force of the hydraulic cylinder 58 during the dust compression processing by the compression plate 6 to maintain a constant compression force to reduce the amount of dust. Accordingly, the guide guide 38 is made to follow. When the hydraulic motor 52 stops due to overload, the stop lock state is released by switching the hydraulic cylinder 58 to the side where the rod 58b projects. The hydraulic cylinder 58 is attached to an upper position of the guide frame 12 so as to face upward, and a tip of a rod 58 b of the hydraulic cylinder 58 is pivotally connected to the guide 38.

A support frame 61 for holding one end of a flexible link 60 called a cable carrier is provided on the machine frame 21 of the elevator 20. One end of the flexible link 60 is fixed to the upper end of the support frame 61 from above to below, and the upper end of the flexible link 60 is held at the middle of the length of the lifting guide 10.

The flexible link 60 is formed by connecting a plurality of short pipes in series, and a plurality of flexible oil supply pipes (not shown) are formed in the inner holes of the flexible link 60. ) Is passed through. Each oil supply pipe is for supplying hydraulic oil to the hydraulic motor 52 and the hydraulic cylinder 41, and the other end of each oil supply pipe is connected to a hydraulic control device (not shown) installed on the ground S. . The hydraulic cylinder 58
Is supplied by an oil supply pipe without passing through the flexible link 60.

The hydraulic control device controls the supply of hydraulic oil to the hydraulic motor 52 and each of the hydraulic cylinders 41 and 58 through each oil supply pipe by controlling the opening and closing of an electromagnetic valve in a hydraulic circuit. And the compression plate 6, the rake 30, and the guide 38 are opened and closed.

FIG. 7 shows an electrical configuration of the hydraulic control device. In the figure, reference numeral 71 denotes a microcomputer, which includes a CPU 72 as a control subject and an RO in which a program is stored.
M73 and a RAM 74 for reading and writing data. The CPU 72 has a control panel 7 via a bus 75.
6, a pump 77, a pressure sensor 80, first to third solenoid valves 81, 82, 83, first and second limit switches 90, 91, and the like are connected.
The input / output is controlled in accordance with the program stored in the CPU and predetermined processing is executed.

Although not shown on the operation panel 76,
In addition to a power switch, an operation mode changeover switch, a forward switch, a reverse switch, and a stop switch, a switch for opening and closing the rake 30 and the compression plate 6 and a switch for moving the upper end portion of the guide 38 up and down are provided. Have been.

The pump 77 supplies hydraulic oil to the hydraulic motor 52 and the hydraulic cylinders 41 and 58, respectively. Pressure sensor 80 and first to third solenoid valves 81, 82, 83
Is interposed in the hydraulic circuit, and the pressure sensor 80
When the elevator 20 stops in the locked state during the compression process, this is detected. The first solenoid valve 81 switches the rotation direction of the hydraulic motor 52, the second solenoid valve 82 switches the reciprocating operation of the hydraulic cylinder 41, and the third solenoid valve 83 switches the reciprocating operation of the hydraulic cylinder 58. Respectively. First and second limit switches 9
Reference numerals 0 and 91 are provided along the transition path of the elevator 20 at the upper end and the lower end of the elevator guide 10.
When the elevator reaches the upper end and the lower end, it is pushed by a proper position of the elevator 20 and turned on.

FIGS. 8 to 10 show the flow of control by the microcomputer 71. The operation of the monorake dust remover will be described below with reference to FIG. In the figure,
ST indicates each step in the control flow.

In FIG. 8, when the power switch of the operation panel 76 is turned on in ST1, the CPU 72 next determines whether or not the operation mode changeover switch has been operated (ST2). This operation mode changeover switch is for switching between “automatic operation” and “manual operation”.
The CPU 72 sets one of the operation modes according to the switch operation (ST3).

Next, when the forward switch is operated, ST
4 is "YES", and if the automatic operation mode is set, the process proceeds from ST5 to ST6, and the CPU 72 executes the automatic operation process. If the manual operation mode has been set, the process proceeds from ST5 to ST7, and the CPU 72 executes a manual operation process.

FIG. 9 shows a control flow for the automatic driving process. In the automatic operation mode, in response to the operation of the forward switch in ST4 of FIG. 8, the CPU 72 drives the hydraulic motor 52 forward to lower the elevator 20 (ST6-1). When the elevator 20 descends, the compression plate 6 and the rake 30 are both set to the “open position”, and the guide roller 37 is disengaged from the guide 38 and rolls on the lower surface of the guide rail 11. The elevator 20 descends.

Immediately before the lift 20 reaches the lower end of the lift guide 10 and hits the stopper 15, the second limit switch 91 is turned on. After the CPU 72 stops driving the hydraulic motor 52, the CPU 72 stops the hydraulic cylinder of the opening / closing drive mechanism 40. 41
Is driven to close the compression plate 6 and set it to the "standby position" as shown by the dashed line in FIG. At this time, the guide roller 37 is engaged with the lower end of the guide 38, and the rake 30 is closed by its own weight to be able to scrape the "closed position".
Is set to

Next, when the CPU 72 drives the hydraulic motor 52 backward to raise the elevator 20, the rake 30 scrapes up the dust caught on the screen 2 (ST).
6-5). When the guide roller 37 moves from the first guide portion 38A of the guide 38 to the second guide portion 38B when the elevator 20 is lifted, the compression plate 6 closes as shown in FIG. Is pressed against the apron 19 to perform a dehydration treatment.

In ST6-7, the CPU 72 monitors the output of the pressure sensor 80 to determine whether the hydraulic pressure of the hydraulic motor 52 is abnormally rising during the scraping or during the spin-drying process. When the elevator 20 reaches the upper end without abnormality, the first limit switch 90 is turned on, and C
PU 72 stops driving of hydraulic motor 52 (ST6).
-8).

Next, the hydraulic cylinder 4 of the opening / closing drive mechanism 40
1 is driven to open the compression plate 6, and during the opening operation, the arm 35 for supporting the compression plate pushes up the bracket 33 to open the rake 30 (ST6-9).
By the opening operation of the rake 30, the dust raked by the rake 30 is released, and the released dust naturally falls and is collected by the collecting mechanism 5 located below.

At the time of the dehydration treatment, the compression plate 6 and the apron 19
If dust is clogged during the period, the hydraulic motor 52 stops in an overload state. When this lock state occurs, the hydraulic pressure of the hydraulic circuit rises, and the pressure sensor 80 turns on to turn on the ST6.
The determination at -6 is "NO", and the CPU 72 stops driving the hydraulic motor 52 (ST6-12). To release the abnormal state, the operation mode is switched from the automatic operation mode to the manual operation mode, and the guide opening / closing mechanism 54 is manually driven to forcibly open the compression plate 6 and the rake 30. It is necessary to move the motor 20 forward or backward to escape from the locked state. If this mode switching operation is performed, the next ST6-13 becomes "YES", and FIG.
Shift to 0 manual operation mode.

After the normal operation, it is determined whether or not the stop switch has been operated in ST6-10.
If "O", the procedure returns to ST6-1 to execute the same procedure. If the stop switch is operated, ST6-11
Becomes "YES", and when the power switch is turned off in the subsequent ST6-12, a series of operations in the automatic operation mode is completed.

FIG. 10 shows a control flow for the manual operation process. In the manual operation mode, the CPU 72 responds to the operation of the forward switch in ST4 of FIG.
Drives the hydraulic motor 52 forward to lower the elevator 20 (ST7-1). The next ST7-2 is whether or not the stop switch has been operated, and the next ST7-3 is whether or not the limit switches 90 and 91 have been turned on.
-4 to 7-10 determine whether or not another switch is operated.

In the case of collecting scraps floating in water, for example, before the elevator 20 reaches the lower end of the lifting guide 10,
The stop switch is operated. Accordingly, ST7-2 becomes "YES", and CPU 72 stops hydraulic motor 52 (ST7-11). If the elevator 20 reaches the lower end without operating the stop switch, the second step is performed in ST7-3.
Is turned on, the CPU 72 forcibly stops driving the hydraulic motor 52 (ST7-1).
1).

Next, when the rake closing operation switch is operated, ST7-7 becomes "YES", and the CPU 72 drives the hydraulic cylinder 41 of the opening / closing drive mechanism 40 to close the compression plate 6 and the rake 30 (ST7). -15). As a result, dust floating in the water is raked by the rake 30.

Next, when the reverse switch is operated, ST
7-4 becomes “YES”, and the CPU 72 drives the hydraulic motor 52 backward to raise the elevator 20 and
No. 0 scrapes up the dust trapped on the screen 2 together with the scraped floating dust (ST7-12). When the guide roller 37 moves to the second guide portion 38B and the compression plate 6 approaches the apron 19, dust is compressed and dehydrated.

If the stop switch is operated before the lift 20 reaches the upper end of the lift guide 10, ST7-2 becomes "YES" and the CPU 72 stops the hydraulic motor 52 (ST7-11). When the elevator 20 reaches the upper end without operating the switch, the first limit switch 90 is turned on (ST7-3), and the CPU 72 stops driving the hydraulic motor 52 (ST7-11).

Next, when the rake opening operation switch is operated, ST7-6 becomes "YES", and the CPU 72 drives the hydraulic cylinder 41 of the opening / closing drive mechanism 40 to open the compression plate 6 and the rake 30 (ST7). -14). As a result, the release of the dust raked by the rake 30 is completed, and the discharged dust naturally falls and is collected by the collecting mechanism 50 located below.

Next, when the forward switch is operated, ST
7-5 is "YES", and the CPU 72 sets the hydraulic motor 5
2 is driven forward to lower the elevator 20, and the dust scraping operation is performed again (ST7-13). If the power switch is turned off during manual operation, ST7-
8 becomes "YES", and a series of operations in the manual operation mode is completed.

In the above-described compression processing, when dust is clogged between the compression plate 6 and the apron 19 to be in the locked state, the operation mode is switched to the manual operation mode in ST6-13 in FIG. Operate the lift switch. As a result, ST7-8 becomes "YES", the upper end portion of the guide 38 is pushed up by the guide drive mechanism 54, and the compression plate 6 and the rake 30 are forcibly opened (ST7).
7-16). Thereafter, the forward switch or the backward switch is operated to move the elevator 20 forward or backward to release the locked state. After the lock is released, the guide lowering switch is operated to return the guide 38 to its original state (ST7-9, ST7-17).

[0054]

As described above, the present invention raises and lowers the lift on which the rake and the compression plate are mounted along the lift guide laid along the screen, so that the rake can be raised and lowered stably. The dust raked up by the rake can be compressed by the compression plate to perform a dehydration treatment. Thus, the refuse is automatically dewatered without special dewatering equipment, so that the refuse can be quickly processed.

According to the second aspect of the present invention, the guide roller provided on the compression plate slides on the first guide section along the screen, and the second guide section has a trajectory lower than the trajectory of the first guide section. When the operation shifts to the guide portion, the compression plate is closed, so that the compression plate can be driven without providing a special driving source, and the configuration for dewatering the dust is extremely simple.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a schematic configuration of a monorake dust remover according to an embodiment of the present invention.

FIG. 2 is a side view of the monorake dust remover.

FIG. 3 is a front view of the monorake dust remover.

FIG. 4 is a sectional view taken along the line AA of FIG. 2;

FIG. 5 is a side view showing the operation of the opening / closing drive mechanism.

FIG. 6 is a side view showing a dehydrating operation by a compression plate.

FIG. 7 is a block diagram showing an electrical configuration of the hydraulic control device.

FIG. 8 is a flowchart showing a control procedure by the microcomputer.

FIG. 9 is a flowchart showing a control procedure of an automatic driving process by the microcomputer.

FIG. 10 is a flowchart showing a control procedure of a manual operation process by the microcomputer.

[Explanation of symbols]

 2 Screen 6 Compression Plate 10 Elevation Guide 20 Elevator 30 Rake 35 Compression Plate Support Arm 37 Guide Roller 38 Guide Guide 38A First Guide Part 38B Second Guide Part

Continued on the front page (72) Fumihiko Ma, Inventor 5-11-22, Motejima, Nishiyodogawa-ku, Osaka-shi Inside Kiki Kogyo Co., Ltd. (72) Hideo Taniguchi 5-11-22, Mitejima, Nishiyodogawa-ku, Osaka, Japan (72) Inventor Masao Tanijima 3-2-1-17 Nitta, Adachi-ku, Tokyo

Claims (2)

[Claims] 1. A mono-rake dust remover for scraping underwater dust along a screen installed so as to block a water channel, comprising: a lift guide laid along the screen; and an elevator moving up and down along the lift guide. A mono-rake dust remover, wherein the elevator comprises a rake for scraping underwater dust along the screen, and a compression plate for compressing and dewatering the dust scraped by the rake. 2. The compression plate is supported by left and right arms, and each arm is provided with a guide roller slidably engaging a guide laid along the screen. Comprises a first guide section having a track of a constant height along the screen, and a second guide section having a track lower than the first guide section, and each of the guide rollers is moved from the first guide section to the first guide section. 2. The monorake dust remover according to claim 1, wherein the compression plate is closed by moving to a second guide portion.