JPH086034Y2 - Secondary hot water washing tank after quenching glycol solution - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a secondary hot water cleaning tank used for surface cleaning of a quenched product as a post-treatment subsequent to glycol quenching, particularly for secondary cleaning.

(Prior Art) Conventionally, in the glycol quenching process, in order to wash away the residual glycol content adhering to the product surface after quenching, the quenched product is taken out of the glycol quenching tank, first carried into the primary shower cleaning tank and sprayed. A method of cleaning, then immersing in a secondary warm water cleaning tank and stirring and cleaning with warm water is adopted.

(Problems to be solved by the invention) However, even if the primary shower cleaning is effectively performed, it is inevitable that a small amount of residual glycol is mixed in the secondary hot water cleaning tank.

As the washing process was repeated many times, the amount of the mixed glycol component was gradually increased, and when the washing warm water was stirred, bubbles composed of the glycol component were formed on the surface of the warm water. In some cases, minute bubbles almost cover the surface of the hot water.

In this case, even if the quenched product is thoroughly stirred and washed in the warm water of the secondary cleaning tank, when the product is pulled up from the warm water after the immersion cleaning, the glycol content adheres to the product surface, leaving no trace of the glycol content. There is a problem that it remains on the surface of the finished product.

The presence of traces of glycol content reduces the commercial value of the hardened product and further compels the final treatment to remove the trace. Therefore, the generation of glycol foam has been a serious problem which is disadvantageous in terms of economic value and productivity.

An object of the present invention is to provide a secondary warm water washing tank after quenching a glycol liquid, which can surely obtain a washed product without any traces of adhesion of glycol. The technical problem is the washing water. At the same time that the surface of the product is washed by stirring with (warm water), the bubbles of the glucose component that floated and formed on the surface of the washing water due to the stirring are constantly transferred to the washing water recovery area (suction port). It is to prevent bubbles of the glycol component from adhering to the product not only during cleaning by stirring but also when the product is taken out after the cleaning process by collecting in the recovery area.

(Means for Solving the Problems) Clearly, the present invention is a secondary hot water washing tank used for cleaning the surface of a product that has been hardened by a glycol solution, wherein the washing water is a pump inside and outside the tank. In a cleaning tank having a circulation system that circulates between the cleaning tank and a discharge nozzle from the stirring nozzle in the tank at the same time, a foam removal nozzle connected to the cleaning water supply pipe of the circulation system is used as a cleaning water It is placed at the same height as the water level toward the inner wall of the tank on the opposite side facing the same nozzle, and at the opposite side of the washing tank facing the bubble removal nozzle, the reservoir is partitioned. Form it so that the upper end of the member is located at a height slightly lower than the water level of the wash water,
Further, the present invention relates to a secondary warm water washing tank after quenching a glycol liquid, characterized in that a suction port of the wash water recovery pipe of the circulation system is provided in the reservoir.

A secondary hot water washing tank according to the present invention includes a circulation pump, a washing water supply pipe for supplying washing water (hot water) from the pump to the tank, the washing water supply pipe having a plurality of stirring nozzles in the tank. A cleaning tank that consists of cleaning water recovery piping for collecting cleaning water from inside the tank, and has a circulation system in which the cleaning water circulates between the inside and outside pumps of the tank and is simultaneously discharged from the stirring nozzle. is there.

In addition, the secondary warm water washing tank of the present invention is provided with a bubble removing nozzle and a reservoir. The bubble removal nozzle is a nozzle connected to the circulating cleaning water supply pipe and its header, for example, at the same height as the cleaning water level in the cleaning tank, that is, the cleaning water. Is arranged toward the inner wall of the tank on the opposite side facing the nozzle at the height of the water level (height above the water surface) or a height very close to it.

The reason why the bubble removing nozzle is arranged at substantially the same level as the water level of the cleaning water is that when the bubble removing nozzle is arranged at a height higher than the water level of the cleaning water, the cleaning water from the nozzle is placed in the cleaning tank. When it flows out, it mixes with air and foams, and during cleaning, a considerable amount of foam is always present on the surface of the cleaning water in the tank.
This is because bubbles cannot be removed, and when the bubble removal nozzle is placed at a height lower than the water level of the cleaning water, the cleaning water from the nozzle directly contacts the bulk part of the cleaning water in the cleaning tank. This is because the bubbles of the glycol component supplied and floating on the surface of the washing water cannot be removed well, and the floating of the bubbles from the surface of the product is also hindered.

Further, the reservoir portion is made of a suitable partition member (for example, the structural material 9 as shown in the embodiment) at a portion on the opposite side in the cleaning tank facing the bubble removing nozzle, and the inside of the cleaning tank (cleaning portion). The bulk of water) forms an isolated space. Although the shape and the size of the reservoir are arbitrary, the upper end of the partition member is formed so as to be located at a height slightly lower than the water level of the wash water.

Here, the reservoir is formed so that the upper end of the partition member is located at a height slightly lower than the water level of the cleaning water, because the liquid in the reservoir and the bulk portion of the cleaning water in the cleaning tank are diffused and mixed. This is because it is possible to suppress as much as possible, and the bubbles of the glycol component collected in the reservoir by the bubble removing nozzle can be retained in the reservoir without returning to the outside of the reservoir again.

The suction port of the circulation system cleaning water recovery pipe is provided in the reservoir. Here, the suction port of the recovery pipe is provided in the reservoir because when there is no reservoir or the suction port is outside the reservoir, a part of the bubbles of glycol that floats above the product surface. Is collected from the suction port together with the cleaning water, and in the worst case, the collected glycol foam is supplied again into the cleaning tank through the cleaning water supply pipe and the stirring nozzle, and eventually the cleaning tank is filled with foam. It will lead to the situation.

(Operation) Generally, the product which has been subjected to the glycol liquid quenching and then the primary shower cleaning is immersed in a secondary warm water cleaning tank, and the surface thereof is cleaned by stirring the cleaning water (warm water) in the tank.
The washing water is agitated by circulating the washing water between a pump inside the tank and a pump outside the tank and discharging the washing water from a plurality of stirring nozzles inside the tank. In this treatment process, the glycol content remaining on the surface of the product is removed from the surface and becomes bubbles and floats on the surface of the washing water in the tank.

In the present invention, since the bubble removing nozzle is disposed in the cleaning tank at substantially the same level as the water level of the cleaning water and is directed toward the inner wall of the tank on the opposite side, it is possible to prevent the cleaning water from flowing out from the nozzle. , A unidirectional flow is formed on the surface of the washing water in the tank toward the opposite side of the surface of the washing water, and thus the bubbles of glycol component floating on the surface of the washing water in the tank are reversed. Can be steadily removed to a side site.

Further, in the present invention, since the upper end of the partition member is formed at a height slightly lower than the water level of the cleaning water, the reservoir is formed at the opposite side of the cleaning tank facing the bubble removing nozzle. , The bubbles of the glycol component that are constantly removed can be collected in the reservoir and kept there. The glycol bubbles retained in the reservoir are
As it is a foam of water-soluble oil, it floats on the surface of the liquid in the reservoir and disappears spontaneously after a while.

Further, in the present invention, since the suction port of the recovery pipe is provided in the reservoir, the cleaning water can be recovered from the suction port with almost no bubbles of glycol component mixed therein.

Therefore, by constantly removing bubbles of the glycol component and retaining them in the reservoir, not only during washing by stirring,
Even when the product is taken out after the washing treatment, glycol foam does not adhere to the product.

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

The warm water washing tank 1 of the embodiment has a plurality of stirring nozzles 3 ...
Is provided on the lower side of the bottom plate 11, which is connected to the pump 5 by the supply pipe 4, and the recovery pipe 6 is arranged from the pump 5 such that its suction port 7 is located above the tank 1. The hot water in the tank is discharged from the nozzle 3 by the operation of 5, and the water in the tank is agitated and circulated with the pump 5.

In the present embodiment, the bubble removing nozzle 2 is provided in the cleaning tank 1 at a position opposite to the suction port 7 at a height substantially the same as the water level h of the cleaning water (warm water). It is arranged so as to face the inner wall (suction port 7) on the opposite side to the opposite side. The nozzle 2 is connected to the header 20 of the supply pipe 4, and the washing water is made to flow out by the operation of the pump 5.

Further, in the present embodiment, at the site on the opposite side in the cleaning tank facing the bubble removal nozzle 2, the structural member 9 is used as the partition member, and the reservoir 10 has the upper end of the partition member above the water level h of the cleaning water. It is formed to be located at a slightly lower height. The suction port 7 of the recovery pipe 6 is provided in the reservoir 10.

Then, the product A is first immersed in the quenching tank 12 containing the glycol solution 13 shown in FIG. 2 for quenching, and then the quenched product A is carried into the temporary shower cleaning tank 14 shown in FIG. After covering with the lid 16, the nozzle 15 is spray-washed, and then it is immersed in the secondary hot water washing tank 1 of FIG. 1 and stirred and washed by discharging hot water from the nozzle 3 (arrow ± in FIG. 1). The y direction indicates the direction of loading and withdrawing the product A). At this time, hot water is also discharged from the nozzle 2 toward the suction port 7, and the bubbles 8 of the glycol component on the surface of the hot water are driven toward the suction port 7 and removed in the direction of arrow p.

In the cleaning tank 1 of the example, when the product A was pulled up after stirring and cleaning, the bubbles 8 did not adhere to the product surface.

(Effect of the Invention) As described above, according to the present invention, the surface of the product is cleaned by stirring the cleaning water (warm water), and at the same time, the amount of glucose formed on the surface of the cleaning water is increased by the stirring. The bubbles can be constantly removed towards the sump by the wash water flowing out of the defoaming nozzle and can be collected and held in the sump, so that the washing process can be carried out not only during the washing by stirring. When removing the product later, it is possible to prevent bubbles of glycol content from adhering to the product,
Therefore, it is possible to surely obtain a washed product without any glycol traces, which leads to an increase in product price, and a final treatment for removing the traces is unnecessary, which is economically advantageous.

[Brief description of drawings]

FIG. 1 is a sectional view showing a secondary warm water washing tank of an embodiment of the present invention, FIG. 2 is a sectional view showing a glycol liquid quenching tank, and FIG. 3 is a sectional view showing a primary shower cleaning tank. In the figure, 1 ... Secondary hot water washing tank 2 ... Foam removal nozzle 3 ... Stirring nozzle 4 ... Supply pipe 5 ... Pump 6 ... Recovery pipe 7 ... Suction port 8 ... Glycol foam A …… Quenched product h …… Warm water level

Claims (1)

[Scope of utility model registration request] 1. A secondary warm water cleaning tank used for cleaning the surface of a product that has been hardened with a glycol solution, wherein the cleaning water circulates between the inside and outside pumps of the tank for stirring in the tank at the same time. In a cleaning tank having a circulation system discharged from a nozzle, a foam removing nozzle connected to the cleaning water supply pipe of the circulation system is installed in the cleaning tank at substantially the same height as the water level of the cleaning water. It is arranged so as to face the inner wall of the tank on the opposite side facing the nozzle, and at the site on the opposite side of the washing tank facing the bubble removing nozzle, the reservoir part has a high end where the upper end of the partition member is slightly lower than the water level of the wash water. So that it is located at
A secondary warm water washing tank after quenching a glycol liquid, characterized in that the suction port of the wash water recovery pipe of the circulation system is provided in the reservoir.