JPS6245319B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a multistage washing tank used for plating.

Generally, this type of multi-stage water washing tank is used to wash the pretreatment liquid containing turbid substances that adhere to the surface of the workpiece during pretreatment processes such as degreasing and pickling before plating. The main body, an upstream partition wall arranged at a predetermined position of the washing tank main body, and the washing tank main body so as to maintain an appropriate distance from the upstream partition wall and to form a gap on the bottom wall side. It has been constructed of a weir consisting of a downstream partition wall located at the downstream side.

In a multi-stage washing tank configured in this way, the flowing water supplied to one side overflows the upstream partition wall, and the overflowing water is dammed by the downstream partition wall. hand,
The water flows between the upstream and downstream partition walls toward the bottom wall, passes through the gap below the downstream partition wall, and meanderes up and down within the washing tank body while repeating this flow. flows from one side to the other.

However, when the object to be treated in the step before plating treatment is washed with water in the multi-stage water washing tank, the pre-treatment liquid containing the turbidity adhering to the surface of the object is removed, and the turbidity with a relatively heavy specific gravity is removed. Although they settle in the multi-stage washing tank, substances with light specific gravity, such as fine dirt and dirt containing oil, float on the surface of the running water.
Even if the flowing water flows as described above, such floating objects will adhere to the upper edge of the upstream partition wall due to the surface tension of the flowing water; Because they tend to aggregate near the edges and drift, it is difficult to flush the floating material out of the multi-stage washing tank. When the treated material is washed with water, the suspended matter adheres to the treated material, making it difficult to perform proper washing with water, especially when the head difference between the tanks is small.

The purpose of this invention is to prevent floating matter floating on the water surface of running water from adhering to the weir through a flushing process within the flushing tank body, and to flush out the floating matter along with the running water to the outside of the flushing tank body. To provide a multi-stage rinsing tank used for plating, which always maintains the flowing water in the rinsing tank body in a clean state.

In view of these issues, the multi-stage washing tank used for plating of the present invention includes an upstream partition wall arranged at a predetermined position of the washing tank main body, an appropriate distance from the upstream partition wall, and , a weir consisting of a downstream partition wall arranged on the washing tank body so as to form a predetermined gap on the bottom wall side, and the inlet side notch is above the upstream partition wall, The outlet cutout is formed at a position offset to one side, and the outlet side notch is formed at a position offset to the other side above the downstream partition wall.

Hereinafter, preferred specific examples of the multi-stage washing tank used for plating according to the present invention will be described with reference to the drawings.

1 to 3 show a specific example 10 of a multi-stage washing tank used for plating according to the present invention.

The multi-stage washing tank 10 includes an upstream partition wall 14 arranged at an appropriate interval within the washing tank main body 11,
15, and a gap 19, which is kept at a small distance from the upstream partition walls 14, 15, and on the bottom wall 18 side.
A weir 1 consisting of downstream partition walls 16 and 17 arranged in the washing tank main body 11 so as to form a
2, 13, and the inlet side notches 21, 2
2 are formed above the upstream partition walls 14 and 15 at positions biased to one side, and outlet side notches 23 and 24 are formed above the downstream partition walls 16 and 17, respectively. and are each formed at a position offset to the other side.

The washing tank main body 11 is made of metal, synthetic resin, or the like, and has a box shape with an upper opening.

Weirs 12 and 13 are connected to upstream partition walls 14 and 13, respectively.
15 and downstream partition walls 16, 17, and a plurality of tanks 30, 31, 32 are provided in the washing tank main body 11.
They are arranged substantially parallel to each other at a predetermined distance within the washing tank main body 11 so as to form the following.

That is, the upstream partition wall 14 constituting the weir 12 is arranged at a predetermined position within the washing tank main body 11, and the tank 30 is placed on one side of the washing tank main body 11.
is formed.

Of course, the height of the upstream partition wall 14 is lower than the height of the washing tank main body 11, so that the running water supplied into the tank 30 overflows at the upper edge of the upstream partition wall 14. It is configured.

Therefore, the height of the upstream partition wall 14 determines the water level of the flowing water in the tank 30.

The downstream partition wall 16 constituting the weir 12 is spaced a short distance from the upstream partition wall 14, and is arranged so as to form a predetermined gap 19 on the bottom wall 18 side of the washing tank main body 11. It is arranged in the washing tank main body 11.

The downstream partition wall 16 is the upstream partition wall 1
4 is constructed so as to dam up the flowing water overflowing the gap 19 and allow the flowing water to flow toward the gap 19 side.

Of course, the downstream partition wall 16
As can be understood from the figure, it is fixed to both side walls of the washing tank main body 11 while being lifted upward within the washing tank main body 11, and a gap 19 is formed on the bottom wall 18 side. An opening is formed below the downstream partition wall 16 to the extent that it does not significantly impede the flow of water in the tank 31, and the lower end of the downstream partition wall 16 is connected to the bottom wall 18 of the washing tank main body 11. They may be placed close to each other.

In addition, the upstream partition wall 15 that constitutes the weir 13
is arranged within the washing tank main body 11 so as to maintain an appropriate distance from the above-mentioned downstream partition wall 16 and form a tank 31 between the downstream partition wall 16 and the downstream partition wall 16 .

Of course, the height of the upstream partition wall 15 is slightly lower than the height of the above-mentioned upstream partition wall 14, so that the flowing water supplied into the tank 31 flows through the upstream partition wall 1.
It is configured to overflow at the upper edge of 5.

Therefore, the upstream partition wall 15 is connected to the tank 31.
Determine the water level of running water within.

The downstream partition wall 17 constituting the weir 13 is spaced a short distance from the upstream partition wall 15, and is arranged so as to form a predetermined gap 20 on the bottom wall 18 side of the washing tank body 11. It is arranged in the washing tank main body 11.

The downstream partition wall 17 is the upstream partition wall 1
It is configured to dam the running water overflowing the gap 5 and allow the running water to flow toward the gap 20 side.

Of course, the downstream partition wall 17
As can be understood from the figure, inside the washing tank main body 11, the bottom wall 18 is fixed to both side walls of the washing tank main body 11 in an upwardly lifted state.
Although a gap 20 is formed on the side, an opening is formed below the downstream partition wall 17 to the extent that it does not significantly impede the flow of water in the tank 32. The lower end may be placed close to the bottom wall 18 of the washing tank main body 11.

Moreover, it goes without saying that the downstream partition wall 17 forms the tank 32 on the other side of the washing tank main body 11 by being arranged as described above.

The inlet side notches 21 and 22 are the above-mentioned weirs 12 and 1.
The downstream notches 23 and 24 are formed above the upstream partition walls 14 and 15 in the weirs 12 and 13, respectively, at positions biased to one side.
They are formed above the downstream partition walls 16, 17 at positions offset to the other side.

That is, the inlet side notch 2 in the weir 12
1 is an upper edge of the upstream partition wall 14, and is formed at a position biased toward one end.

Of course, the inlet side notch 21 is formed with a predetermined width and depth, and the width and depth correspond to the size of the washing tank body 11, in other words, the capacity and the washing tank main body. It is determined according to the flow rate of the flowing water supplied to 11.

Therefore, if running water is supplied to fill the tank 30, the running water will flow through the upstream partition wall 14.
Not only does the water overflow, but the water also flows diagonally within the tank 30 toward the inlet cutout 21 side.

The outlet side notch 23 in the weir 12 is formed at the upper edge of the downstream partition wall 16 at a position biased toward the other end.

The outlet side notch 23 is formed with a predetermined width and depth, and extends to a position slightly below the water level of the flowing water flowing between the upstream and downstream partition walls 14 and 16. It is formed by cutting out.

In addition, the inlet side notch 22 in the weir 13
is formed at the upper edge of the upstream partition wall 15 at a position biased toward one end.

The entrance side notch 22 is formed with a predetermined width and depth, but the downstream partition wall 16 described above
and the upstream partition wall 15, that is, the tank 3
It is formed by cutting out to a position slightly below the water level of the flowing water flowing inside the pipe.

Of course, the flowing water that passes through the gap 19 and the outlet side notch 23 in the weir 12 and is supplied to the tank 31 flows over the upstream partition wall 15 and flows to the inlet side notch 22 side. The water flows diagonally within the tank 31 toward.

The outlet side notch 24 in the weir 13 is formed at the upper edge of the downstream partition wall 17 at a position biased toward the other end side.

The outlet side notch 24 is formed with a predetermined width and depth, and extends to a position slightly below the water level of the flowing water flowing between the upstream and downstream partition walls 15 and 17. It is formed by cutting out.

In addition, in the tank 32 in the washing tank main body 11,
On one side, a drain sump 25 is formed with an overflow wall 26 inside;
The running water in the tank 32 is discharged from the discharge port 27 of the tank 32 .

Of course, the overflow wall 2 of the discharge sump 25
6 is positioned so that its upper edge is slightly lower than the water level of the flowing water in the tank 32.

Therefore, the flowing water that passes through the gap 20 and outlet side notch 24 in the weir 13 and is supplied into the tank 32 flows through the tank 32 to the discharge pool 25.
It flows approximately diagonally to the side, overflows at its overflow wall 26, and is discharged.

Next, to explain the flow of water in the above-mentioned multi-stage washing tank 10, first, the multi-stage washing tank 1
When supplying running water to tank 30, water tap 28 is installed on the tank 30 side.
The water supply faucet 28 is arranged on the tank 30 side at a position substantially diagonal to the inlet side notch 21.

If running water is continued to be supplied from the hydrant 28, the tanks 30, 31, 32 will be almost filled with the running water, but the water level of the tanks 30, 31, 32 will be lower than the weir 1.
2 and 13 are lowered in order.

If flowing water is further supplied from such a state, the flowing water in the tank 30 will flow diagonally toward the inlet side notch 21 while overflowing the upstream partition wall 14.

The flowing water passes through the gap 19 in the weir 12 and the outlet side notch 23 and is supplied to the tank 31 due to the flow, while overflowing the upstream partition wall 15 of the weir 13, the water passes through the inlet side notch 22 side. It flows diagonally towards.

Furthermore, the flowing water that passes through the gap 20 and the outlet side notch 24 in the weir 13 and is supplied to the tank 32 due to such a flow flows approximately diagonally toward the discharge portion 25 side.

Therefore, in the multi-stage water washing tank 10, the objects to be treated in the plating pre-treatment process are washed with water, and each tank 3
Even if turbidity or oil is suspended in the flowing water in the water flowing through the water in the upstream partition walls 14, 15, the turbidity or oil will be removed by the surface flow of the flowing water as described above.
It becomes difficult to adhere to the upper edge of the partition wall 1 on the upstream side.
The aggregation of turbidity and oil near the upper edge of 4 and 15 is avoided, and the turbidity and oil are transferred to the inlet side notch 2.
1, 22 and the outlet side notches 23, 24, and are sequentially flowed together with the flowing water to the tanks 30, 31, 32 side, and are discharged from the discharge reservoir 25 of the tank 32, and as a result, the tanks 30, 31 , 32 is maintained in a clean state.

In the multi-stage washing tank normally used based on this invention, the inlet side and outlet side notches 2
1, 22, 23, 24 are the respective tanks 30, 3
It is desirable that the depth of the notch be 2 to 8 mm from the water surface of the flowing water at points 1 and 32, and the width of the notch should be adjusted according to the flow rate so that the thickness of the overflowing water is 2 mm or more. With this configuration, the above-mentioned floating substances can be effectively removed.

Of course, the above-described multi-stage washing tank 10 has been described as being used in the plating pre-treatment process, but the same effects as described above can be achieved even if it is used in the plating post-treatment process.

According to the above invention, there is an upstream partition wall disposed at a predetermined position of the washing tank main body, an appropriate distance from the upstream partition wall, and a predetermined gap formed on the bottom wall side. In a multi-stage washing tank used for plating equipped with a weir consisting of a downstream partition wall arranged in the main body of the washing tank, the inlet side notch is located above the upstream partition wall on one side. The notch on the outlet side is formed in a position offset to the other side above the downstream partition wall. Therefore, floating matter floating on the surface of the running water is prevented from adhering to the weir, and the floating matter is flushed out of the washing tank body along with the running water.
The running water in the washing tank body is always maintained in a clean state, making it extremely practical.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing a specific example of the multi-stage washing tank used for plating according to the present invention, with a part of the side wall cut away, and Fig. 2 shows the multi-stage washing tank shown in Fig. 1 with the side wall removed. FIG. 3 is a front view showing the state, and a plan view of the multi-stage washing tank shown in FIG. 1. 10...Multi-stage washing tank used for plating, 11...
Washing tank body, 12, 13... Weir, 14, 15... Upstream partition wall, 16, 17... Downstream partition wall, 18... Bottom wall, 19, 20... Gap, 21, 22... Inlet side notch, 23, 24...Exit side notch.

Claims (1)

[Claims] 1. An upstream partition wall disposed at a predetermined position in the washing tank main body, and a partition wall that maintains an appropriate distance from the upstream partition wall and forms a predetermined gap on the bottom wall side. and a weir consisting of a downstream partition wall arranged in the washing tank body, the inlet side notch is above the upstream partition wall,
is formed at a position biased to one side, and the outlet side notch is above the downstream partition wall,
A multi-stage washing tank used for plating, characterized in that it is formed in a position biased to the other side.