JP4495328B2 - Sand collection device for sand basin - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a sand collecting device that collects sand accumulated at the bottom of a sand basin in a sand basin provided in a water purification facility or a sewage treatment facility.
[0002]
[Prior art]
When wastewater is treated at a clean water treatment facility or sewage treatment facility, wastewater that contains a large amount of sand and inorganic substances that have sedimentation properties similar to sand is put in the settling basin before entering the settling basin. A method of removing inorganic substances such as sand is generally performed. Therefore, a method for recovering sand accumulated in a sand basin has been developed and implemented. The first method is a method in which sand accumulated by a mechanical scraper installed at the bottom of a sand basin is collected in one place and sucked up by a pump. There are underwater traction type, underwater link belt type, underwater rotation type, etc. as the scraper type, and it is selected according to the size of the sand basin, the amount of sand generated, etc.
[0003]
The second method is a method of installing an injection nozzle instead of installing the mechanical scraper. In the method disclosed in Japanese Patent Laid-Open No. 63-62508, a plurality of spray nozzles are installed in one direction on the bottom surface of a sand basin, and sand accumulated by spraying pressure water from the spray nozzles is collected in one place. It is collected by sanding and sucking up with a pump.
[0004]
[Problems to be solved by the invention]
However, in the first raking method, the mechanical raking machine installed at the bottom of the pond is submerged year round, so that corrosion progresses and failure tends to occur. In order to repair, it was necessary to drain the waste water and scrape the sand, which had a problem that it was difficult to repair.
In the second spray nozzle fixing method, the spray nozzle fixed on the bottom surface interferes with the problem that the accumulated sand cannot be collected in one place, and in order to collect the accumulated sand evenly, There is a problem that it is necessary to install the nozzles densely, the number of nozzles increases, and the maintenance of the nozzles becomes troublesome in response to clogging.
[0005]
Then, this invention makes it a subject to provide the sand collection apparatus of the sand basin which can inspect and repair outside a sand basin and can collect sand efficiently.
[0006]
[Means for Solving the Invention]
As a means for solving the above-mentioned problems, a sand collecting device according to the invention described in claim 1 is a sand collecting device that collects sand settling at the bottom of a sand settling basin, comprising a plurality of arms and each arm. An articulated arm having a plurality of joints to be connected and having a bending / extending means for bending and extending the arm by expansion and contraction of a cylinder disposed between the arms, and a base end portion of the articulated arm are fixed and swiveled The articulated arm is linearly moved by driving the motor along the main body turning part that turns the articulated arm around the vertical axis by the forward / reverse rotation drive of the motor for driving or the guide arranged over the entire width of the sand basin The articulated arm moving means installed on the roof of the sand basin composed of the moving main body to be ejected, and the injection of pressure water fixed to the tip of the articulated arm and supplied from the pump via the hose Due to Controlling the injection nozzle to move the grit deposited on the bottom of the pond sand reservoir portion formed in one longitudinal end of the settling basin, the actuation of the actuation and the injection of the pressurized water articulated arm and its moving means And a control means.
[0007]
The invention described in claim 1 covers the sand collection of the entire bottom of the settling basin with a single nozzle by making the spray nozzle movable. In addition, there is no interference on the bottom of the sand basin, and the bottom is flat. The movement of the spray nozzle is controlled by a program prepared in advance, and the sedimentation sand is collected by spraying pressure water from the spray nozzle. Can collect sand. The collected sand is sucked up by a pump and collected.
Furthermore, since the sand collecting device can be evacuated to the outside of the sand basin, it is inspected and repaired outside.
In the articulated arm, the movement range of the spray nozzle covers the entire bottom of the sand basin by bending and stretching of the arm and turning or linear movement. Further, since the sand collecting device of the present invention is an articulated arm installed outside, no sand collecting device is required in the sand basin.
[0008]
In the invention described in claim 1, the operation of injecting the pressure water is performed by a pump start command, and the control means for controlling the operation of the moving means is controlled by a control valve for controlling the amount of oil supplied to the hydraulic cylinder. Do. Further, turning and the like are controlled by controlling the rotation of a motor provided in the turning portion. The motor is a servo motor, but may be another motor capable of controlling rotation.
[0009]
The invention described in claim 2 is the sand collecting apparatus for the sand basin according to claim 1, wherein the sand collecting basin is provided on the roof of the sand basin, sucks the sand collected in the sand basin, It has the pump which collect | recovers outside .
[0011]
The sand collecting device according to the invention described in claim 3 is a sand collecting device for collecting the sand settling at the bottom of the sand settling basin, and has a plurality of arms and a plurality of joints connecting each arm, An articulated arm having a bending / extending means for bending / extending the arm by extending / contracting the cylinder disposed between the arms and a base end portion of the articulated arm are fixed, It is composed of a main body turning part for turning the articulated arm around the vertical axis, or a moving main part for linearly moving the articulated arm by driving a motor along a guide arranged over the entire width of the sand basin. A pump that collects and collects the sediment deposited on the bottom of the sand basin through a hose from the moving means of the articulated arm installed on the roof of the sand basin and the suction port attached to the tip of the articulated arm. When Characterized in that it comprises a control means for controlling the operation of the wicking operation and the articulated arm and its moving means of the sand.
[0012]
The invention described in claim 3 covers the sand basin with this one by making the suction port movable. In addition, there is no interference on the bottom of the sand basin, and the bottom is flat. The movement of the suction port is controlled by a pre-prepared program, and the accumulated sand is directly sucked from the suction port by the suction force of the vacuum pump. . This eliminates the need for a gutter groove and eliminates the need for a pump for sucking up the collected sand, which is further simplified.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a side view of a sand collecting device for explaining a first embodiment of the present invention, which shows a sand basin 1 in cross section, and FIG. 2 is a plan view thereof.
In FIG. 1, waste water containing sand flows into a sand basin 1 from a water inlet 2, and the sand naturally settles and accumulates on, for example, a, b, c, and d on the bottom surface. A plurality of pumps 3 are provided on the roof of the sand reservoir a, and the sand collected in the sand reservoir is collected outside the sand basin 1.
[0014]
The mechanism of the moving means of the sand collecting device 5 of the present invention includes an articulated arm 7 and a main body turning portion 6. The main body turning section 6 has a turning motor M, and the articulated arm 7 is turned left and right by forward and reverse rotation driving of the motor. The drive mechanism is a combination of a worm and a worm wheel.
The articulated arm 7 includes, for example, four arms (7a to 7d), has three joints, and three cylinders (8a to 8c) are disposed between the arms. These cylinders are hydraulic and the like, and the arms can bend and stretch freely by supplying hydraulic pressure to the cylinders and expanding and contracting the cylinders. In FIG. 2, 25 is a hydraulic device, and 3a is a pump for supplying pressure water to the injection nozzle. Reference numeral 27 denotes an operation panel, and 28 denotes a control panel, which corresponds to the control means according to claim 1. Examples of linear movement of the arm are shown in FIGS. The description will be described later.
[0015]
In FIG. 1, the sand collecting device 5 of the present invention has a hose 10 attached to the tip of an arm 7d, and the spray nozzle 4 is fixed to the tip. Therefore, the movement of the injection nozzle 4 can cover the entire bottom surface widely by alternately combining one of the bending and stretching operations and the swiveling operation of the articulated arm 7, and evenly deposits the accumulated sand. It can be moved to part a. In addition, although it is set as a single operation here, it may be a combined operation.
[0016]
Further, the injection nozzle 4 can be continuously moved by a program prepared in advance, and automatic operation and unmanned operation are possible. As described above, the sand accumulated by the pressure water from the injection nozzle 4 is collected in the sand reservoir, and the collected sand is sucked up by the pump 3 and collected. Since the sand collecting device 5 can be moved outside the sand basin, it can be inspected and repaired outside the sand basin.
[0017]
In FIG. 2, an example of the movement path | route of the injection nozzle 4 is shown. First, the articulated arm 7 retracted and stored outside the sand basin is bent and extended, and the injection nozzle 4 is moved to the position of the bottom surface e. The pump 3a is activated to inject pressure water. When the injection nozzle 4 arrives at point f from point e due to the turning of the arm, it then moves from point f to point g due to the extension of the arm. Subsequently, the arm moves from point g to point h by turning the arm. Thereafter, the z point is reached by repeating the movement in the same manner. To change the movement speed, pitch width, etc., change the program according to the amount of sand accumulated on the bottom.
[0018]
It is a figure explaining 2nd Embodiment of this invention based on FIG. 1, FIG.
In FIG. 1, a camera 19 is fixed to the tip of the arm 7d. Alternatively, the sensor 20 is disposed on the ceiling of the sand basin. By fixing a light (not shown) in addition to the camera 19 to the tip of the arm 7d, the inside of the sand basin can be clearly reflected on the monitor, and the state during sand collection can be confirmed on the monitor screen. Sand collection work can be improved easily, and sand collection work can be easily evaluated. Further, the sensor 20 may be an ultrasonic sensor or the like, and may be configured to detect that a predetermined accumulation amount has been reached at the bottom, and to selectively inject pressure water with an injection nozzle only at the bottom. Needless to say, the camera is a small underwater camera and the light has a waterproof function.
[0019]
FIG. 3 is a cross-sectional view of a sand basin 1 for explaining a third embodiment of the present invention, and FIG. 4 is a plan view thereof.
In FIG. 3, as in the first embodiment, when waste water containing sand flows into the sand basin 1 from the water inlet 2, the sand accumulates at, for example, a, b, c, d on the bottom surface. The sedimentation sediment deposited on the bottom is directly collected from the suction port 11 attached to the tip of the arm 7d of the articulated arm 7. Therefore, the groove of the sand reservoir a part and the pump 3 installed on the roof are unnecessary.
The mechanism part of the sand collecting device 5 of the present invention is roughly composed of an articulated arm 7 and a moving main body part 13. The moving main body 13 linearly moves in the width direction of the sand basin on the two rail-shaped guides 14 disposed over the entire width of the sand basin.
[0020]
3 and 4, the hose 10 is attached to the tip of the arm 7d through the arm 7a, and the suction port 11 is fixed to the tip. Therefore, the movement of the suction port 11 can cover the entire bottom surface widely by alternately combining any one of the bending and stretching operations and the moving operation of the articulated arm 7 as in the first embodiment. Can be collected evenly. Further, the suction port 11 can be continuously moved by a program prepared in advance, and automatic operation is possible.
The feature here is that the step of collecting sand in the sand reservoir a is omitted and the pump 26 directly sucks up.
Moreover, since the sand collecting apparatus 5 can move out of a sand basin, it is the same as that of 1st Embodiment that an outdoor inspection and repair are attained.
[0021]
In FIG. 4, the movement route of the embodiment will be described. First, the articulated arm 7 retracted and stored outside the sand basin is bent and stretched, and the suction port 11 at the tip of the arm 7d is moved to the position of point e on the bottom surface. The vacuum pump 26 is activated to suck up the accumulated sand. Next, when the arm body reaches the point f from the point e by the linear movement, the arm moves from the point f to the point g due to the extension of the arm. Subsequently, the arm moves from point g to point h by linear movement of the arm. Thereafter, the same movement is repeated to reach the z point. Movement speed, pitch width, etc. are changed by changing the program.
[0022]
FIG. 5 is a plan view in which the linear movement type sand collecting device 5 is arranged in a plurality of sand basins. By extending the guide 14, it becomes possible for one sand collecting device 5 to cover a plurality of sand basins, so that the operating rate of the sand collecting device 5 can be improved and the cost can be reduced.
[0023]
【The invention's effect】
According to the invention described in claim 1, efficient sand collection can be performed without unevenness. In addition, the inspection work can be simplified by installing it outside, repair and maintenance are easy, and the management cost is reduced.
[0024]
In addition, a wide range of sand collection is possible by the bending and stretching operation and turning operation or linear movement of the articulated arm, and no sand collecting device is required in the sand basin. In addition, the sand collecting device has a simple configuration.
[0026]
According to the third aspect of the present invention, efficient sand collection is possible without unevenness, and a single sand collection device can cover a plurality of sand basins, thus improving the operating rate. The cost can be reduced. In addition, the sand basin is further simplified because it does not require a sand ditch or a sand suction pump.
[Brief description of the drawings]
FIG. 1 is a side view of a sand collecting apparatus according to first and second embodiments of the present invention, showing a sand basin in cross section.
FIG. 2 is a plan view of a sand collecting apparatus according to first and second embodiments of the present invention.
FIG. 3 is a side view of a sand collecting apparatus according to a third embodiment of the present invention, showing a sand basin in cross section.
FIG. 4 is a plan view of a sand collecting apparatus according to a third embodiment of the present invention. FIG. 5 is a plan view of the sand collecting apparatus according to the third embodiment of the present invention. The case where this sand collecting apparatus operates is illustrated.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Sand basin 2 Water inlet 3 Pump 4 Injection nozzle 5 Sand collector 6 Main body turning part 7 (7a-7d) Articulated arm 8 (8a-8c) Cylinder 10 Hose 13 Moving main body part 14 Guide 19 Camera 20 Sensor 25 Hydraulic pressure Device 26 Vacuum pump 28 Control panel

Claims (3)

A sand collecting device that collects the sediment deposited at the bottom of the sand basin,
An articulated arm having a plurality of arms and a plurality of joints for connecting the arms, and a bending and stretching means for bending and stretching the arms by expansion and contraction of a cylinder disposed between the arms;
The base end of this articulated arm is fixed, and the main body turning part that turns the articulated arm around the vertical axis by the forward / reverse rotation drive of the turning motor, or the guide disposed over the entire width of the sand basin A moving means for the articulated arm installed on the roof of the settling basin, comprising a moving main body that linearly moves the articulated arm by driving a motor along
The sand settling at the bottom of the settling basin is fixed to the tip of the articulated arm and is deposited at the bottom of the settling basin by the injection of pressure water supplied from a pump through a hose, and moved to a sand basin formed at one longitudinal end of the settling pond An injection nozzle;
Control means for controlling the operation of the injection of the pressure water and the operation of the articulated arm and its moving means;
A sand collecting device for a sand basin characterized by comprising: The sand collecting apparatus for a sand settling basin according to claim 1, further comprising a pump provided on the roof of the sand collecting section, which sucks the sand collected in the sand collecting section and collects it outside the settling basin. A sand collecting device for collecting the sediment deposited at the bottom of the sand basin,
An articulated arm having a plurality of arms and a plurality of joints for connecting the arms, and a bending and stretching means for bending and stretching the arms by expansion and contraction of a cylinder disposed between the arms;
The base end of this articulated arm is fixed, and the main body turning part that turns the articulated arm around the vertical axis by the forward / reverse rotation drive of the turning motor, or the guide disposed over the entire width of the sand basin A moving means for the articulated arm installed on the roof of the settling basin, comprising a moving main body that linearly moves the articulated arm by driving a motor along
From the suction port attached to the tip of the articulated arm, a pump that sucks and collects the sand that has accumulated on the bottom of the sand basin via a hose;
Control means for controlling the operation of sucking up the settling sand and the articulated arm and its moving means;
A sand collecting device for a sand basin characterized by comprising:

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