JPS62287B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cleaning device for a screen installed in a waterway.

BACKGROUND ART In sewage treatment facilities, etc., in order to reduce the load on the facilities, garbage contained in wastewater from a settling basin is removed using a screen.

FIG. 1 shows an example of such a screen 1. By the way, the screen 1 may become clogged, and as a countermeasure to this problem, a method has been proposed in which a nozzle capable of spraying cleaning water in a direction perpendicular to the screen 1 is moved along the screen 1. However, the screen 1 generally has a side frame 2, and in the conventional screen described above, there is a problem in that the corner portion 3 of the side frame 2 is difficult to be cleaned sufficiently.
There is also the problem that dirt adhering to the front of the screen is pushed to the back side, making it impossible to eliminate clogging.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to make it possible to sufficiently clean the corners of the screen, and also to reliably wash away the dust adhering to the front surface of the screen.

In order to achieve this object, the present invention provides a movable truck facing a screen provided in a waterway, and this truck is provided with a nozzle capable of spraying cleaning water toward the screen, and A nozzle position adjustment device is provided that can adjust the cleaning water injection angle of the nozzle with respect to the nozzle and the distance from the cleaning water collision position on the screen to the nozzle.

Therefore, since the cleaning water can be sprayed at an angle with respect to the screen, it is possible to spray the cleaning water towards the corners of the screen, which not only makes it possible to clean these corners well, but also removes dirt that has adhered to the front of the screen. It is possible to prevent dirt from being pushed into the screen, thereby making it possible to reliably wash away the dirt, and moreover, the cleaning water can be sprayed onto the screen at an optimal distance according to the spray pattern of the nozzle.

Examples of the present invention will be described below. Second
In the figures, 1 is a screen provided in the waterway 4, 2 is a side frame thereof, and 5 is a dirt receiving pit. On the other hand, above the screen 1,
A pair of horizontal rails 6 are provided along the screen 1, on which a truck 7 can run. The rail 6 is a horizontal channel member 1 attached to a bracket 9 from a wire member 8.
It is provided inside 0. Reference numeral 11 denotes an axle of the truck 7, to which power is transmitted through a chain 13 from a motor 12 with a reduction gear. 14 is a sprocket.

The trolley 7 has a frame portion 15 extending downward,
A first nozzle support section 16A and a second nozzle support section 16B are attached to the frame section 15 via a pair of nozzle position adjustment devices 17a and 17b, respectively. Each nozzle support part 16A, 16
B is composed of a tubular nozzle body 18 arranged vertically along the screen 1 and a plurality of nozzle parts 19 arranged in the length direction of the nozzle body 18. Further, the nozzle body 18 is connected to the partition wall 2
0 into an upper tube portion 21 facing the upper half of the screen 1 and a lower tube portion 22 facing the lower half of the screen 1. A water supply hose 23 is provided on the pipe upper part 21 of the first nozzle support portion 16A.
A first upper branch pipe 25A is connected to the first upper branch pipe 25A through a first solenoid valve 24A, and a water supply hose 23 is connected to the lower pipe 22 of the first nozzle support 16A through a first manual cock 26A. A first lower branch pipe 27A is connected. Furthermore, a second upper branch pipe 25B is connected to the upper pipe part 21 and a lower pipe part 22 in the second nozzle support part 16B via a second solenoid valve 24B, and a second lower part is connected to the pipe upper part 21 and the lower pipe part 22 in the second nozzle support part 16B. A branch pipe 27B is connected.

FIGS. 4 and 5 show the nozzle position adjustment device 17a,
17b in detail. Here, 28 is a bracket fixed to the above-mentioned frame portion 15, and a support shaft 29 is welded to it. A turret pipe 30 is rotatable around the support shaft 29, and can be fixed to the bracket 28 at an appropriate rotational position with a bolt 31. The turret pipe 30 is composed of a base 32 that fits around the support shaft 29 and a pipe section 33 that projects from the base 32.
A removable shaft 34 is inserted into the shaft. Reference numeral 35 is a set screw for fixing the shaft 34 to the pipe portion 33 with an appropriate amount of extraction. At the tip of the shaft 34, a split pipe holder 36 that can clamp the nozzle body 18 is attached to the pin 3.
It is swingably attached around 7. 38
is a fixture for the turret pipe, which includes a bracket 39 fixed to the frame portion 15, a lever 40 swingably attached to the bracket 39, and a bolt for fixing the lever 40 to the pipe portion 33 of the turret pipe 30. 41.

As shown in FIGS. 2 and 3, each pair of nozzle position adjusting devices 17a and 17b is arranged so that the rotation centers 42 (see FIG. 7) of both turret pipes 30 lie within the same plane perpendicular to the screen 1. It is configured to be located in

In addition, in FIGS. 2 and 3, 43 is the trolley 7.
A movable pulley 45 that is a power supply cable for the system and is movable along a guide rail 44 parallel to the rail 6.
It is attached together with the water supply hose 23. Further, 46 is a warning light indicating that the device is in operation.

As shown in FIGS. 6a to 6c, when the types of screens 1 are different, the injection angle of the cleaning water 48 from the direction 47 perpendicular to the screen 1 is changed for each type, and an experiment is performed to find the optimal angle. It is necessary to find it by Furthermore, the distance from the nozzle section 19 to the cleaning water collision position 49 on the screen 1 has an optimum value (for example, about 30 centimeters) depending on the spray pattern of the nozzle section 19, regardless of the change in the spray angle described above. , this distance must always be kept constant. Based on these points, the positions of the nozzle supports 16A and 16B are adjusted. Note that FIGS. 6a to 6c illustrate cases in which the injection angle from the direction 47 perpendicular to the screen 1 is changed to 30 degrees, 45 degrees, and 60 degrees.

A specific method for adjusting the positions of the nozzle supports 16A and 16B will be explained based on FIG. 7. That is, as described above, from the nozzle part 19 to the collision position 49
When changing the injection angle while keeping the distance to a constant value, there will be a corresponding nozzle position 50. Therefore, the turret pipe 30 shown in FIGS. 4 and 5 is rotated around the rotation center 42, and fixed to the bracket 28 with the pipe portion 33 facing the nozzle position 50, and the shaft 34 is attached to the pipe at the same time. The shaft 34 is fixed to the pipe part 33 by inserting and removing the nozzle body 18 into the pipe part 33 and aligning the nozzle body 18 with the specified nozzle position 50. At this time, as described above, each nozzle support part 16A, 16B
There is a pair of position adjustment devices 17a and 17b for each position, but since the pipe holder 36 is swingably attached to the shaft 34, the degree of freedom of this swinging part prevents excessive force from acting on the nozzle. is prevented. Once the nozzle supports 16A, 16B are set at the predetermined nozzle position 50, the nozzle body 18 is rotated within the pipe holder 36 and fixed so that it can inject at a predetermined angle.

In addition, as shown in FIGS. 6 and 7, the nozzle part 1
Nozzles 9 are arranged in a staggered manner, and in order to keep the distance to the collision position 49 strictly constant, the amount of protrusion from the nozzle body 18 is varied. Further, although FIG. 7 also illustrates cases where the injection angle is 30 degrees, 45 degrees, and 60 degrees, the injection angle can be adjusted to any other suitable angle. Furthermore, the first and second nozzle supports 16A, 16B are set such that their nozzle portions 19 face each other. In addition,
The position adjustment work of the nozzle supports 16A and 16B as described above only needs to be performed when the screen 1 and this cleaning device are completed, and once the appropriate spray angle according to the type of screen 1 etc. is set,
No further adjustments are necessary.

Explain the cleaning work. The truck 7 is made to travel, and the cleaning water 48 is injected from the nozzle supports 16A, 16B directed in the traveling direction. For example, when the truck 7 is run from the left side to the right side in FIG. 1, the truck 7 also runs rightward in FIG. 3, and at this time, the first solenoid valve 24A is in the open state. At the same time, the second solenoid valve 24B is closed.
Then, the cleaning water 48 is sprayed from the first nozzle support part 16A, in which the nozzle part 19 is arranged facing the traveling direction of the truck 7, and the screen 1 is cleaned. The dirt on the screen 1 is washed off into the pit 5. At this time, since the cleaning water 48 is injected particularly toward the corner 3 corresponding to the right side frame 2 of the screen 1 in FIG. 1, this right corner 3 is well cleaned. .

Once the truck 7 has traveled to the rightmost screen, it now reverses its strike direction and travels to the left in FIGS. 1 and 3. This time, the first electromagnetic valve 24A is closed, the second electromagnetic valve 24B is opened, and the cleaning water 48 is injected from the second nozzle support part 16B in the traveling direction of the truck 7. In this case, the left corner 3 of the screen 1 is well cleaned.

In this way, cleaning is completed by selectively operating the nozzle supports 16A and 16B facing the traveling direction of the truck 7 and reciprocating the truck 7 an appropriate number of times. Note that, if necessary, both the electromagnetic valves 24A and 24B may be opened simultaneously to inject the cleaning water 48 from both nozzle supports 16A and 16B at the same time. Also, the nozzle portions 19 of both nozzle support portions 16A, 16B
may be arranged back to back, and this can be selected as appropriate when adjusting the position of the nozzle described above.

Incidentally, normally, dirt tends to adhere to the upper half of the screen 1, and when the cleaning water 48 is sprayed from the pipe upper part 21 by opening and closing the electromagnetic valves 24A and 24B, the dirt adhering to this upper half is removed. Mainly washed off. If dirt adheres to the lower half of the screen 1, the cleaning water 48 can also be sprayed from the lower tube part 22 by operating the manual tips 26A, 26B to clean it. In this case, only manual opening/closing control is possible, and switching injection by reciprocating the truck 7 as described above is not possible.

As described above, according to the present invention, since cleaning water can be sprayed in an inclined state relative to the screen,
It is possible to spray cleaning water towards the corners of the screen, which not only allows for good cleaning of these corners, but also prevents dirt attached to the front of the screen from being pushed in, making it possible to reliably wash away this dirt. Moreover, the cleaning water can be sprayed onto the screen at the optimum distance according to the spray pattern of the nozzle.

[Brief explanation of the drawing]

1 is a diagram illustrating a screen, FIG. 2 is a diagram illustrating an embodiment of the present invention, FIG. 3 is a left side view thereof, FIG. 4 is a plan view showing an enlarged nozzle position adjustment device, and FIG. FIG. 5 is a partially cutaway front view thereof, FIG. 6 is a diagram showing changes in the injection angle, and FIG. 7 is an explanatory diagram of a nozzle position adjustment method. 1...Screen, 4...Waterway, 7...Dolly, 16A
...First nozzle support part, 16B...Second nozzle support part, 17a, 17b...Nozzle position adjustment device, 4
8...Washing water, 49...Collision position, 50...Nozzle position.

Claims (1)

[Claims] 1. A movable truck is provided opposite to a screen provided in a waterway, and this truck is provided with a nozzle that can spray cleaning water toward the screen, and the cleaning water injection angle of the nozzle with respect to the screen; A screen cleaning device comprising: a nozzle position adjustment device that can adjust the distance from the cleaning water collision position on the screen to the nozzle.