JPH0580578U - Movable scum removal gutter support device - Google Patents

Abstract

(57) [Summary] [Purpose] The scum removal gutter is designed to lift and lower a horizontally long scum removal gutter by a single lifting rod without the need for electrical control means of the scum removal gutter lift drive system. A bending phenomenon and a shake phenomenon can be prevented in advance, and the cost can be reduced. [Structure] Fixed on the inner wall of the treatment tank 1 for sewage treatment,
A pair of left and right vertical guide rails 8 which are parallel at a predetermined interval,
8 and a single elevating rod 5 supported by the processing tank 1 and capable of ascending / descending at an intermediate portion between the left and right guide rails 8, 8.
And an elevating and lowering driving means 6 for the elevating and lowering rod, an intermediate part is connected and suspended to a lower end of the elevating and lowering rod 5, and both side ends are vertically slidably fitted into the left and right guide rails 8, 8. It is characterized by a combined slider 9 and a scum removal gutter 2 connected and held under the slider.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 This invention is, for example, a movable scum that supports a scum removal trough capable of lifting and lowering adjustment according to the water level fluctuation in order to eliminate inflow of scum floating on the liquid level in a treatment tank for batch type activated sludge treatment of inflowing wastewater. The present invention relates to a support device for a removal gutter.

[0002]

[Prior Art]

 FIG. 3 is a schematic cross-sectional view showing a support device for a movable scum removal gutter provided as one conventional example. In the figure, reference numeral 1 denotes a batch type activated sludge treatment (aeration process / sedimentation / discharge process). Is a scum removal gutter for inflowing and collecting and removing floating scum on the liquid level in the tank. This scum removal gutter 2 The processing tank 1 has a horizontally long gutter structure that extends in the width direction, and both ends thereof are supported by a pair of left and right hydraulic cylinders 3 and 3 so as to be vertically movable. Therefore, in the case of this conventional example, the scum removal trough 2 is moved up and down by the left and right hydraulic cylinders 3 and 3 according to the fluctuation of the water level in the treatment tank 1, so that the scum removal trough 2 corresponds to the liquid surface. I try to keep it horizontal.

FIG. 4 is a schematic cross-sectional view showing a supporting device for a movable scum removal gutter provided as another conventional example. In FIG. 4, reference numeral 4 is a lock installed in the middle part of one side wall upper part of the processing tank 1. The bracket 5 for supporting the rod is a single lifting rod composed of a screw rod rotatably supported by the bracket 4 for supporting the rod rotatably, and 6 is a handle for rotating the lifting rod. The lifting rod 5 has a support structure in which the lower end portion of the scum removal gutter 2 is connected and suspended at an intermediate portion thereof. Therefore, by rotating the lifting rod 5 in the forward and reverse directions with the handle 6, the height of the scum removing gutter 2 is adjusted according to the fluctuation of the water level in the tank.

[0004]

Since the conventional support device for the movable scum removal gutter is configured as described above, in the case of FIG. 3, not only the two hydraulic cylinders 3 and 3 are required, but also the scum. Since there is a need for an electrical control means for holding the removal trough 2 in a horizontal position at a height position according to the fluctuation of the water level, there is a problem that the equipment cost thereof increases significantly. Further, when the two hydraulic cylinders 3 are controlled to be driven manually, there is a problem that two workers are required and the driving control operation is very troublesome. Further, in the case of FIG. 4, since the horizontally long scum removal gutter 2 is supported at one point by the elevating rod 5 at the central portion thereof, the scum removal gutter 2 is apt to bend or shake, and this bend or shake is prevented. In order to do so, it is necessary to increase the rigidity of the scum removal gutter 2 and the elevating rod 5, and if these rigidity are increased, there is a problem that the weight of each increases and the cost is inevitably increased.

The present invention has been made to solve the above-described problems, and a scum removing gutter can be used to remove a horizontally long scum removing gutter with one elevating rod without the need for electrical control means of the elevating drive system. An object of the present invention is to provide a support device for a movable scum removal gutter, which is capable of vertically and reliably preventing the scum removal gutter from flexing and swaying while being driven up and down, and also capable of reducing costs. And

[0006]

[Means for Solving the Problems]

 The support device for the movable scum removal gutter according to the present invention fixes a pair of left and right vertical guide rails parallel to each other at a predetermined interval on the inner wall of a treatment tank for treating wastewater, and can move up and down at an intermediate portion between these guide rails. One elevating rod is supported by the processing tank and is interlocked with the elevating drive means, and the middle part of the slider is engaged with the left and right guide rails so that both end portions are vertically movable. The scum removal gutter is connected and held under the slider.

[0007]

[Action]

 In the support device for the movable scum removing gutter according to the present invention, when one elevating rod is driven up and down, the scum removing gutter connected and suspended via the slider to the lower end of the elevating rod moves up and down. At this time, since the slider connecting the lifting rod and the scum removal gutter is fitted into the left and right guide rails and lifts up and down, the runout phenomenon of the scum removal gutter during lifting up and down is surely prevented. .. In addition, the slider has a width corresponding to the distance between the left and right guide rails, and the scum removal gutter is connected and held at its full width, so that the material rigidity of the scum removal gutter is reduced. Even if the scum removal gutter is not increased, the bending phenomenon of the scum removal gutter can be prevented in advance, and a sufficient supporting strength of the scum removal gutter can be obtained.

[0008]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view showing a supporting device of a movable scum removing gutter according to an embodiment of the present invention, and FIG. 2 is an enlarged sectional view taken along the line AA of FIG. The same reference numerals are given and duplicate description is omitted. In FIGS. 1 and 2, reference numerals 8 and 8 denote a pair of left and right vertical guide rails which are fixed to the inner wall of the processing tank 1 and which are parallel to each other at predetermined intervals. The lifting rod 5 of the book is supported by the same means as in the case of FIG. 4, and the lifting rod 5 is driven to rotate in the forward and reverse directions using the handle 6 as the lifting drive means.

Reference numeral 9 denotes a slider, and the slider 9 has leg pieces 9a, 9a integrally on both end portions thereof, and has a width dimension of a length corresponding to a mutual distance between the left and right guide rails 8, 8. Is made. The middle upper portion of the slider 9 is connected to and suspended from the lower end portion of the elevating rod 5 via a pin P. Both side leg pieces 9a, 9a of the slider 9 are fitted and engaged in the left and right guide rails 8, 8 so as to be slidable up and down.

A scum removing gutter 2 is welded to the lower end portions of the both side leg pieces 9a, 9a of the slider 9 via distance spices 10, 10 in a two-sided holding manner. The scum removing gutter 2 is formed to have a length corresponding to the inner width of the processing tank 1, and is provided with a horizontally long scum inlet 2b having a scum overflow weir 2a extending over substantially the entire length thereof. A pump pit 2c is provided at an intermediate portion of the scum removal gutter 2, and a submersible pump (not shown) is housed in the pump pit 2c and a scum discharge hose 7 is connected.

Next, the operation will be described. The treatment tank 1 repeats the aeration process, the precipitation process, and the discharge process in the state of receiving the sewage. During the precipitation process, when the raising / lowering rod 5 is rotated by the handle 6 according to the water level change in the treatment tank 1, the raising / lowering rod is moved. The slider 9 is moved up and down via 5. The slider 9 moves up and down during the up-and-down operation with both side leg pieces 9a, 9a fitted and engaged in the guide rails 8, 8. Therefore, the scum removing gutter 2 that moves up and down integrally with the slider 9 is prevented from being bent or shaken, and is adjusted and held at a height position near the liquid surface according to the fluctuation of the water level. In this case, the scum removing gutter 2 is adjusted in height so that the scum overflow weir 2a is submerged near the liquid level in the tank. In this state, the floating scum on the liquid level in the tank flows into the scum removal gutter 2 through the scum inlet 2b, and the inflowing scum flows into the pump pit 2c of the scum removal gutter 2 and the pump pit 2c. It is discharged to the outside of the system via the scum discharge hose 7 by the operation of the submersible pump inside.

In the above embodiment, a screw rod is used as the elevating rod 5, and a handle 6 for manual operation is used as the elevating driving means. However, the elevating rod 5 is rotated by an electric rotary drive means. Alternatively, the elevating rod 5 may be replaced with a single hydraulic cylinder having a piston rod that connects and suspends the intermediate portion of the slider 9.

[0013]

[Effect of the device]

 As described above, according to this invention, when one elevating rod is driven up and down, the scum removing gutter connected and suspended via the slider to the lower end of the elevating rod moves up and down. At this time, the slider connecting the lifting rod and the scum removal gutter is fitted into the left and right guide rails and moves up and down in an engaged state.Therefore, the swing phenomenon when the scum removal gutter is lifted is reliably prevented. There is an effect that a stable lifting operation of the scum removal gutter can be obtained. Also, the slider has a width corresponding to the distance between the left and right guide rails, and the scum removal gutter is connected and held at the full width thereof, so that the material rigidity of the scum removal gutter is increased. Even if the scum removal gutter is not increased, the bending phenomenon of the scum removal gutter can be prevented in advance, a sufficient supporting strength of the scum removal gutter can be obtained, and the electric horizontal control means of the scum removal gutter lifting drive system can be obtained. Since it is not necessary, cost down can be achieved.

[Brief description of drawings]

FIG. 1 is a sectional view showing a support device for a movable scum removal gutter according to an embodiment of the present invention.

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

FIG. 3 is a cross-sectional view showing a support device for a movable scum removal gutter as a conventional example.

FIG. 4 is a sectional view showing a supporting device of a movable scum removing gutter as another conventional example.

[Explanation of symbols]

 1 treatment tank 2 scum removal gutter 5 lift rod 6 handle (lift drive means) 8 guide rail 9 slider

Claims (1)

[Scope of utility model registration request] 1. A support device for a movable scum removal gutter, which is installed in a treatment tank for treating wastewater, and which collects and removes floating scum on the liquid level in the tank by collecting and removing it, fixed at a predetermined interval on the inner wall of the treatment tank. A pair of left and right vertical guide rails that are parallel to each other, a single lifting rod that is supported by the processing tank and that can be lifted and lowered at an intermediate portion between the left and right guide rails, and lifting drive means for lifting and lowering the lifting rod. A slider having an intermediate portion connected and suspended to a lower end portion of the elevating rod, and both end portions connected to and retained by the left and right guide rails so as to be slidable up and down. A support device for a movable scum removal gutter, comprising: a scum removal gutter.