JP2564660B2 - Liquid floating material removal device - Google Patents

Description

Description: [Industrial field of use] The present invention relates to a liquid surface floating substance removing apparatus for removing floating substances on a liquid surface.

[Prior Art] In a water treatment device, a surface treatment device, etc., it is necessary to remove floating substances such as oils, paint dregs, dust, and bubbles floating on the liquid surface of the stock solution stored in various tanks. It is extremely important for maintaining the original function.

For example, in a car body painting factory,
As seen in Japanese Patent Publication No. 6 and Japanese Patent Publication No. 62-1318, wash water (stock solution) is circulated through a liquid storage tank. On this occasion,
Paint debris (floating matter) floating on the liquid surface in the liquid storage tank is removed by a float type suction device as shown in FIG.

In the figure, 1A is a liquid storage tank, 2 is a pump, and 3A is a suction port 4.
A connecting pipe for connecting the pump and the pump 2 is connected to the suction port 4 at the liquid level L.
It is a float held in. The float 5 is connected to the suction port 4 so that the suspended matter W on the liquid surface can be efficiently sucked.
Hold in place with respect to. For this reason, the connecting pipe 3A is allowed to follow the liquid level of the float 5 in addition to the metal pipe 3P.
A part is formed including a flexible hose 3H.

Here, the positional relationship between the liquid level L (L1) and the suction port 4 is such that the air suction amount is minimized from the viewpoints of minimizing the amount Q of drained liquid discharged by the pump 2, improving suction efficiency, and protecting the pump. It is determined that the suspended matter W can be collected while aiming. Generally, as shown in Japanese Patent Laid-Open No. 63-162093, the liquid surface L is selected to be slightly above the center of the suction port 4.

Therefore, when the pump 2 is operated, the suspended matter W is sucked together with the gas and liquid from the suction port 4 and discharged to the outside processing facility (not shown) through the connecting pipes 3A (3H, 3P).

Further, an electrodeposition coating apparatus shown in FIG.
-162093), etc., an electrodeposition tank 1B and an overflow tank 6
And adjacently arranged via a partition plate 7, and the electrodeposition liquid (stock solution) overflowing the partition plate 7 is poured into a wire mesh strainer 11 arranged on the overflow tank 6 side to remove dust, bubbles, solid pigments and the like. are doing. The liquid in the overflow tank 6 is circulated by the liquid circulating means (pipe 3B, pump 8, strainer 9, discharge pipe 10).

Further, 15 is an elevating means for moving the partition plate 7 up and down in order to adjust the liquid level L in the electrodeposition tank 1B.

[Problems to be Solved by the Invention] However, the above-mentioned conventional removal device cannot remove suspended matter W smoothly and reliably.

That is, in the float system shown in FIG. 3, since the floating posture of the float 5 is unstable, the amount of air in the hose 3A changes depending on the suction state of the liquid, and the hose 3A (3H) itself shakes in the liquid. Along with this, the float 5 itself also oscillates on the liquid surface and sucks in a predetermined amount of air or more, which not only lowers the suction efficiency but also burns the pump 2 and the like. Moreover, for example, a sudden liquid level change of H = 2 to 6 m (L1 → L2, L2 → L1)
If so, the suction port 4 will be completely submerged in the liquid or projected into the air due to the inertial action of the float 5, so that it will be difficult to suck. Also, once air etc. is sucked in, the hose 3A (3
A large amount of air accumulates in (H), and the buoyancy causes the float 5 to rock and fall, making it impossible to suck.

On the other hand, the strainer system shown in FIG. 4 can remove large dust and the like, but cannot remove fine pigment solids and the like, and it is not only difficult to remove blisters that have a great influence on the coating quality. On the contrary, there is a risk that it will promote the formation of bubbles. Further, when the strainer 11 is clogged, there is a problem that the line must be stopped and replaced. In addition, even if the strainer 11 is made extremely fine, if the surface layer liquid flow in the electrodeposition tank 1B is slow, bubbles will not flow easily and cannot be removed even in this case.

The object of the present invention is an apparatus in which the liquid level of the stock solution varies greatly,
To provide a liquid surface floating substance removing device which can be applied to a device in which the liquid surface is actively adjusted, a device having an overflow type liquid level adjusting means, etc., and which can reliably and smoothly remove floating substances continuously. is there.

[Means for Solving the Problems] The present invention relates to a stock solution tank which holds a liquid surface of a stock solution constant, and a partition plate which is vertically movable so as to adjust a liquid level height in the stock solution tank, A storage tank that contains the stock solution that has overflowed from the stock solution over the partition plate, a suction bowl that has a suction port that intersects with the liquid surface in the stock solution tank, and a pump that is connected to the suction port by a pipe. A liquid suction means, wherein the suction bowl is supported on the partition plate so that the relative position between the suction port and the liquid surface in the stock solution tank adjusted by the vertical movement of the partition plate is constant. Characterize.

[Operation] In the present invention having the above-described configuration, the partition liquid keeps the liquid level of the undiluted solution in the undiluted solution tank constant. Therefore, when the gas-liquid suction means is driven, the suspended matter is sucked from the suction port of the suction bowl intersecting with the liquid surface together with a small amount of the stock solution and air. Also, when the partition plate is moved up and down to adjust the liquid level in the stock solution tank, the suction bowl moves up and down together with the partition plate, so the relative position of the liquid level and the suction port does not change, and the Can be removed smoothly and reliably.

Therefore, once the various liquids are replenished to the main liquid tank from the source tank having various liquid level fluctuations constituting various devices, the suspended matter on the liquid level in the source tank can be continuously removed.

On the other hand, if the stock solution tank is also used as the original tank, the suspended matter can be removed more efficiently.

[Embodiment] An embodiment of the present invention will be described with reference to the drawings.

(First Embodiment) FIG. 1 is a side sectional view showing a first embodiment of the present invention.

This removing device is a gas-liquid suction means including a stock solution tank 20, a storage tank 30, a partition plate 25 for partitioning the two tanks 20 and 30, and a suction bowl 5.
40, a structure in which a vertically moving means 50 for vertically moving the partition plate 25 to adjust the liquid level L in the stock solution tank 20 is provided, and the suction bowl 5 is integrally supported by the partition plate 25 via the connecting means 60. It is said that. In this embodiment, for example, the washing water (stock solution) of the liquid storage tank (source tank) 1A shown in FIG. 3 is flowed into the stock solution tank 20 through the pipe 34 to remove the liquid surface suspended matter W in the source tank 1A. The case of removal is shown, and only the cleaning water collected in the storage tank 30 is returned to the original tank 1A through the pump 35 and the pipe 36.

The stock solution tank 20 has a role of holding the liquid surface L of the stock solution in which the suspended matter W is present constant, and fixes the relative position of the suction port 4 of the suction bowl 5 and the liquid surface L at a position capable of highly efficient absorption. Is what you are trying to do. In other words, it is a means for keeping the cross relative position between the liquid surface L and the suction port 4 unchanged even if there is a large change in the amount of the raw liquid flowing from the source tank 1A.

The liquid level L in the stock solution tank 20 can be adjusted by moving the partition plate 25 up and down by operating the up-and-down moving means 50. In the case of this embodiment, it is advantageous to deal with the increase / decrease change of the inflow amount from the main tank 1A.

Therefore, the lower end portion 25C of the partition plate 25 is guided so as to be vertically movable along the partition wall 31 (hollow portion 31a) between the tanks 20 and 30,
Moreover, the upper end portion 25b is fixed to the support rod 53 of the vertical movement means 50. The curved portion 25a is configured to smoothly flow the undiluted liquid overflow and prevent the ripples in the storage tank 30.

The up-and-down moving means 50 is formed of a screw shaft 51 connected to a support rod 53 so as to be relatively rotatable, a channel member 54 fixed to a frame or the like, a handle 52, and a nut member 55. The partition plate 25 can be moved up and down to adjust the height of the partition plate 25.

Now, the gas-liquid suction means 40 is composed of a suction port 4 formed with a corrugated recess provided in the suction bowl 5, and a pipe 3 connecting the suction port 4 and the pump 2.

Here, the connecting means 60 is a means for supporting and connecting the suction bowl 5 to the partition plate 25, and causes the suction port 4 to follow the liquid level L of the stock solution tank 20 which changes depending on the height adjustment of the partition plate 25. It is provided for the purpose of keeping the relative position between the liquid surface and the liquid surface L constant. Specifically, it is formed of a horizontal member 61 fixed to the suction bowl 5 and a support member 62 fixed to the partition plate 25. In this embodiment, it is assumed that the uppermost end of the partition plate 25 and the suction port 4 are connected to each other via a fine adjustment means formed of a nut member 63 and a screw shaft 64 so that the absolute height can be finely adjusted. There is.

In this embodiment having such a configuration, it operates as follows.

The liquid level L of the stock solution flowing from the source tank 1A is kept constant in the stock solution tank 20.

The floating material W floating on the liquid surface L is sucked together with the gas and liquid from the suction port 4 while flowing toward the storage tank 30, and the pipe 3 and the pump 2
It is discharged to an appropriate treatment facility via. The undiluted solution from which the suspended solids W have been removed passes over the partition plate 25, overflows, and is collected in the storage tank 30.

After that, it is recirculated to the original tank 1A through the pump 35 and the pipe 36. Therefore, even if the liquid level of the original tank 1A is greatly changed, it can be surely removed by this device.

Further, for example, when the inflow amount per unit time from the original tank 1A is very large, the handle 52 is rotated to operate the partition plate 25.
To lower the liquid level L. In this case, since the suction bowl 5 is integrally connected to the partition plate 25 via the connecting means 60, the position of the suction port 4 is corrected by following the adjusted liquid level. Therefore, there is no fear of sucking only a large amount of the undiluted solution or only the air, or the suction failure will occur, and the gas-liquid sucking means 40 can always suck the suspended matter W with the highest efficiency.

Therefore, according to the first embodiment, the stock solution tank 20, the partition plate 25, the storage tank 30, and the suction bowl type gas-liquid suction means 40 are provided,
Since the suction bowl 5 and the partition plate 25 are integrally connected via the connecting means 60 and the relative position between the suction port 4 and the liquid surface L is unchanged, the presence of the suspended matter W The floating material W can be smoothly and surely removed by eliminating the disadvantages of the conventional float system that the suction efficiency is lowered and the suction is not possible due to the large fluctuation of the liquid level in the tank 1A.

Further, since the height of the partition plate 25 can be adjusted by the vertical movement means 50, even if the amount of inflow from the original tank 1A is increased or decreased, the height of the liquid surface L can be quickly adjusted and the stock solution It is possible to operate with the liquid level difference in the storage tank 30, which is optimal for preventing foam formation, for example, in accordance with the property.

Furthermore, since the fine adjusting means (63, 64) are provided, the connecting means 60 can be constructed with a simple structure and at low cost, and in view of the size of the suspended solid W, the viscosity of the undiluted solution, etc., the liquid level L and the suction port 4 are provided.
Since the relative position with respect to and can be held appropriately, it is possible to always suck efficiently and have wide adaptability.

(Second Embodiment) The second embodiment is shown in FIG. 2 (outer perspective view) and is configured such that the stock solution tank 20 also serves as the source tank 1A of the first embodiment. However, in FIG. 2, the vertical moving means 50, the connecting means 60, etc. are omitted because they are the same as in the first embodiment.

Therefore, the same working conditions as in the case of the first embodiment, such as the reliable removal of the suspended matter W, can be achieved, and the stock solution tank 20 can be apparently omitted, so that the equipment cost can be significantly reduced.

Here, for example, in the electrodeposition coating apparatus shown in FIG. 4 above, the stock solution tank 20 is formed by the electrodeposition tank 1B, the storage tank 30 is formed by the overflow tank 6, and the inside of the electrodeposition tank 1B as the original tank is formed. If the suction bowl 5 is connected to the partition plate (7) supported by the elevating means 15 to configure this removing device, a large number of strainers 11 are repelled, and whipping in the overflow tank 6 is prevented. It is easily understood that bubbles, dust and the like floating on the liquid surface L of the landing tank 1B can be directly and quickly removed. That is,
Even in the electrodeposition tank 1B that adjusts the liquid level on electrodeposition coating each time,
It is possible to easily embody a suspended matter removing device that fully exhibits the advantages of the similar float (suction bowl) system. The same can be applied to a degreasing tank or the like.

EFFECTS OF THE INVENTION The present invention is provided with a stock solution tank, a partition plate, a storage tank, a suction bowl type gas-liquid absorbing means, and is configured to cause the suction port of the suction bowl to follow the liquid surface of the stock solution tank. A low-cost, easy-to-handle and wide-ranging excellent liquid that eliminates the problems of the conventional float system, strainer system, and overflow system, and can reliably and smoothly remove suspended matter on the liquid surface in the tank that constitutes various devices. A device for removing surface suspended matter can be provided.

[Brief description of drawings]

FIG. 1 is a side sectional view showing a first embodiment of the present invention, FIG. 2 is an external perspective view showing a second embodiment and FIG. 3 and FIG. FIG. 3 shows a float system, and FIG. 4 shows a strainer system. 2 ... Pump, 3 ... Piping, 4 ... Suction port, 5 ... Suction bowl, 20 ... Stock solution tank, 25 ... Partition plate, 30 ... Storage tank, 40 ... Gas-liquid suction means, 50 ... … Vertical movement means, 60… Connection means.

Claims (1)

(57) [Claims] 1. A stock solution tank for keeping a liquid level of a stock solution constant, a partition plate formed so as to be vertically movable for adjusting a liquid level height in the stock solution tank, and a stock solution tank over the partition plate. A storage tank for storing the stock solution that has overflowed, and a gas-liquid suction means formed including a suction bowl having a suction port that intersects with the liquid surface in the stock solution tank, and a pump connected to the suction port and a pipe, The suction bowl is supported on the partition plate such that the relative position between the suction port and the liquid level in the stock solution tank adjusted by the vertical movement of the partition plate is constant, and the liquid level suspended matter is characterized in that Removal device.