JP2003213325A - Quenching vessel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a quenching vessel which doesn't need vast space and vessel capacity, and can rapidly cool not only a simple-shaped material, but also a complicate-shaped material, and enables uniform stirring and quick treatment when rapid-cooling. <P>SOLUTION: This quenching vessel is provided with a first vessel 1 for rapidly cooling the simple-shaped material and a second vessel 11 for rapidly cooling the complicate-shaped material, which forms this height as higher than that of the first vessel and disposes so as to be attachable/detachable into/from the first vessel. A supplying part and an exhausting part of the first vessel, are connected with piping 6 having a pump 5 for stirring in the vessel and a branching pipe 7 is arranged from a portion in the tip end side from the pump in this piping so as to penetrate the first vessel at the tip opening part thereof. When the second vessel is set in the first vessel, a supplying part 13 of the second vessel, is connected with the tip opening part of the branching pipe 7 and a changeover mechanism 8 so as to be changeable to supply quenching liquid from the pump into the first vessel or the second vessel, is arranged at a branching part in the branching pipe. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a quenching tank,
More specifically, the present invention relates to a quenching tank that can sufficiently handle not only a material having a simple shape such as a bar but also a material having a complicated shape with holes or the like formed therein.

[0002]

2. Description of the Related Art In heat treatment of steel, quenching and solution heat treatment require rapid cooling after heating and soaking the material to be treated. Generally, quenching liquid (water, quenching oil, etc.) It is performed by immersing it in a quenching tank filled with. FIG. 3 shows an example of a quenching tank conventionally known for such a purpose. The quenching tank 51 has a relatively low height and includes a tank body 52 having an upper end opening formed in a generally flat shape, and a quenching liquid supply port 53 is provided on opposite side walls near the bottom of the tank body.
And a discharge port 54 are provided, and the supply port and the discharge port are connected by a pipe 56 having a pump 55 for agitating the inside of the tank.
6, sent to the discharge port 54 and circulated as a whole. Reference numeral 57 is a fork-shaped support portion for placing and supporting the processing target material Wa and putting it in the tank main body 52, and is carried by an overhead crane (not shown).

By the way, in the quenching treatment in the quenching bath, a workpiece Wa having a simple shape such as a bar shown in FIG. 3 is preferable, but a stepped hole is formed inside. In some cases, it is necessary to process a large-sized material having a complicated shape. In the case of processing a material to be processed having such a complicated shape, it is necessary to separately prepare and install a quenching tank according to the size, particularly the vertical dimension, in order to process the processing material. However, installation of such a quenching tank requires enormous space and tank capacity. On the other hand, it is conceivable to laterally immerse the material to be treated in the existing quenching tank 51 without installing the quenching tank, but in this case, the stirring force in the tank cannot be made uniform, and the hole There is a problem in that air is not collected properly at the corners that form such as, and air cannot be evacuated well, and it takes time to cool rapidly.

[0004]

Therefore, the present invention solves the above-mentioned conventional problems, and requires not only a huge space and tank capacity but also a simple-shaped material to be treated, It is also possible to perform rapid cooling of materials with complicated shapes,
Moreover, it is an object of the present invention to provide a quenching tank which can be uniformly stirred during rapid cooling and can be rapidly processed.

[0005]

In order to achieve the above object, the invention of claim 1 has a first tank for quenching a material having a simple shape, which has a quenching liquid supply part and a discharge part. , A second tank which is formed to be higher than the first tank and is detachably installed in the tank, and which rapidly cools a material to be processed having a complicated shape,
The supply part and the discharge part of the first tank are connected by a pipe having a pump for stirring in the tank, and a branch pipe is provided from the portion of the pipe on the tip side of the pipe so that the tip opening penetrates the first tank. And a quenching liquid supply part and a discharge part are provided in the second tank,
When the second tank is installed in the first tank, the supply part of the second tank is connected to the tip opening of the branch pipe, and the quenching liquid supplied from the pipe through the branch pipe is the second tank. The quenching liquid entering the inside of the second tank and accumulating in the second tank enters the first tank from the discharge part, and the quenching liquid from the pump is introduced into the first branch of the branch pipe. It is characterized in that a switching mechanism capable of switching so as to be supplied to the tank and the second tank is provided.

According to a second aspect of the present invention, in the first aspect, the branch pipe is provided upward with its tip opening penetrating the bottom portion of the first tank, and is provided in the second tank. Is provided at the bottom of the tank.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described with reference to the accompanying drawings. FIG. 1 shows a state in which a raising tank as a second tank is detachably installed in an existing quenching tank as a first tank, and a material having a complicated shape is rapidly cooled. FIG. 2 shows the existing quenching tank. The drawing shows a state in which the material to be treated having a simple shape is rapidly cooled in the existing quenching tank without installing a raising tank in the tank.

In FIGS. 1 and 2, reference numeral 1 denotes an existing quenching tank, which is equipped with a tank body 2 having the same shape as the quenching tank 51 shown in the conventional example. A quenching liquid supply port 3 and a quenching liquid discharge port 4 are provided on opposite side walls near the bottom of the tank body 2, and the quenching liquid supply port 3 and the discharge port are connected by a pipe 6 having a pump 5 for stirring in the tank. The quenching liquid in the tank body can be circulated as a whole by sending it from the supply port 3 to the pipe 6 and the discharge port 4 by the pump 5. Reference numeral 7 denotes a branch pipe, which is arranged so as to extend substantially vertically upward from a portion of the pipe 6 on the tip side of the pump 5, and the tip opening is provided so as to penetrate almost the central portion of the bottom of the tank body 2. Reference numeral 8 denotes a three-way switching valve as a switching mechanism provided at the branch portion of the branch pipe 7, which has a supply port 3
It is switchable so that the quenching liquid sent from the pump 5 by the pump 5 is supplied to either the discharge port 4 side or the branch pipe 7 side. Reference numeral 9 is a skid for mounting a later-described raising tank, and a plurality of skids are provided at the bottom of the tank main body 2.

Reference numeral 11 denotes a raised tank which is formed to have a height higher than that of the existing quenching tank 1 and is detachably installed in the tank, and includes a tank body 12. A quenching liquid supply port 13 is provided substantially in the center of the bottom of the tank body 12, and a discharge port 14 is formed at the upper portion of the side wall. The supply port 13 is formed to have a diameter slightly larger than the tip opening of the branch pipe 7, and when the raising tank 11 is installed in the existing quenching tank 1, the supply port 13 is fitted into the tip opening and connected. The discharge port 14 is formed at a position higher than the existing quenching tank 1 and lower than the upper end of the raising tank 11. Therefore, when the level of the quenching liquid in the raising tank 11 rises, the quenching liquid overflows from the discharge port 14 into the existing quenching tank 1 and is discharged.

With the above-described structure, the switching valve 8 is supplied from the supply port 3 to the pump 5 in order to rapidly cool the workpiece Wa having a simple shape such as a bar after heating and soaking as in the conventional case.
The quenching liquid sent by the above is switched so as to be supplied to the discharge port 4 side, and the bottom surface has a fork-shaped support portion 17
The material Wa to be processed which has been placed and supported by the above and carried by an overhead crane (not shown) is immersed in the quenching liquid filled in the existing quenching tank 1 in a horizontal direction as shown in FIG. The processed material Wa thus dipped is sent through the pipe 6 while being placed and supported by the support portion 17, is discharged and supplied from the discharge port 4, and is uniformly stirred in the tank body 2 by the stirring action of the pump 5. The liquid is rapidly cooled almost uniformly throughout the liquid. The material Wa that has been rapidly cooled in this way is processed and then lifted up by the crane and carried to another location (not shown).

On the other hand, as shown in FIG. 1, in the case of a large-scale, complicated-shaped workpiece Wb having a stepped hollow hole formed therein and having a complicated shape, the existing quenching tank has a height relationship. It cannot be immersed in 1. Therefore, in order to rapidly cool such a workpiece Wb after heating and soaking, the raising tank 11 is carried by an overhead crane or the like and installed in the existing quenching tank 1.
At the time of installation, the position is adjusted so that the supply port 13 of the raising tank 11 fits into the tip opening of the branch pipe 7 in the existing quenching tank 1, and when the position is matched, it is slowly lowered and the bottom surface thereof is placed on the skid 9. When placed, the supply port 13 becomes the branch pipe 7.
The connection is completed by fitting into the opening at the tip of, and the installation is also completed.

After the installation, the switching valve 8 is switched so that the quenching liquid sent from the supply port 3 by the pump 5 is supplied to the branch pipe 7 side. As a result, the pump 5 installed in the existing quenching tank 1 can supply the quenching liquid into the raising tank 11, the level of the quenching liquid in the raising tank 11 gradually rises, and the material to be treated is processed. The liquid level required for dipping Wb can be maintained. At this time, since the connection between the supply port 13 of the raising tank 11 and the tip opening of the branch pipe 7 is not particularly sealed, some liquid may leak from the raising tank 11 into the existing quenching tank 1, but the branching may occur. There is no problem because more liquid is discharged and supplied from the tip opening of the pipe 7 into the raising tank 11.

When the raising tank 11 is filled with the quenching liquid, the bottom surface is placed and supported by the fork-shaped support portion 17 and is carried by the ceiling crane (not shown) in the same manner as described above. Wb is oriented vertically as shown in FIG.
Moreover, the bored hole faces the opening of the end of the branch pipe 7 and is immersed in the quenching liquid in the raising tank 11. The processed material Wb thus dipped is sent through the pipe 6 while being placed and supported by the support portion 17 and is discharged and supplied from the tip end opening of the branch pipe 7, and is uniformly distributed in the tank body 12 by the stirring action of the pump 5. The whole is rapidly cooled by the quenching liquid that is agitated.

By the treatment with the raising tank 11 as described above, it becomes possible to make up for the deficiency of the dimension in the height direction which the existing quenching tank 1 cannot provide. Moreover, since the pump 5 can sufficiently secure the stirring force required for the rapid cooling, ideal rapid cooling can be performed even for a material having a complicated shape or a large material. After being processed, the workpiece Wb thus rapidly cooled is lifted upward by an overhead crane and carried to another place (not shown) in the same manner as described above.

When it is necessary to rapidly cool the workpiece Wa having a simple shape again, the raising tank 11 is lifted from the existing quenching tank 1 with an overhead crane or the like, and the supply port 13 is opened from the tip opening of the branch pipe 7. Successfully disconnect the connection and remove it to the original place, and re-create the state as shown in FIG. Then, the switching valve 8 is switched so that the quenching liquid sent from the supply port 3 by the pump 5 is supplied to the discharge port 4 side. As a result, the material Wa to be treated can be immersed in the existing quenching tank 1. After that, the material Wa can be carried by the ceiling crane as described above to the quenching liquid in the existing quenching tank 1. Just soak.

The existing quenching tank 1 shown in the above embodiment is used.
Also, the specific dimensions, shape, etc. of the raising tank 11 are merely preferable examples, and detailed design change matters can be variously changed or modified upon implementation. The three-way switching valve 8 shown as the switching mechanism is also an example, and it goes without saying that other valves may be used.

[0017]

Since the inventions of claims 1 and 2 have the above-mentioned structure, a material having a simple shape can be used without requiring a huge space and a tank capacity as in the conventional case. The material to be treated having a complicated shape can be rapidly cooled, and moreover, there is an excellent effect that uniform stirring can be performed during the rapid cooling and rapid processing can be performed.

[Brief description of drawings]

FIG. 1 is a schematic view showing an embodiment of the present invention, showing a state in which a raising tank is detachably installed in an existing quenching tank and a workpiece having a complicated shape is rapidly cooled.

FIG. 2 is a schematic view showing a state in which a material having a simple shape is rapidly cooled in the existing quenching tank without installing a raising tank in the existing quenching tank.

FIG. 3 is a schematic diagram showing a state where a material having a simple shape is rapidly cooled in a conventional quenching tank.

[Explanation of symbols]

1 Existing quenching tank (first tank) 2 tank body 3 Supply port (supply section) 4 Discharge port (Discharge part) 5 stirring pump 6 piping 7 Branch pipe 8 3-way switching valve (switching mechanism) 9 skids 11 Raising tank (second tank) 12 tank body 13 Supply port (supply section) 14 Discharge port (Discharge part)

Claims (2)

[Claims] 1. A first tank having a quenching liquid supply section and a discharge section for rapidly cooling a material to be treated, and a mounting tank which is formed higher than the first tank and is attached to and detached from the tank. A second tank that is installed as much as possible and that rapidly cools a material having a complicated shape, and the supply section and the discharge section of the first tank are connected by a pipe having a pump for stirring in the tank. A branch pipe is provided from a portion on the tip side of the pump with its tip opening penetrating the first tank,
When the quenching liquid supply part and the discharge part are provided in the second tank and the second tank is installed in the first tank, the supply part of the second tank is connected to the tip opening of the branch pipe. , So that the quenching liquid supplied from the pipe through the branch pipe enters the second tank, and the quenching liquid accumulated in the second tank enters the first tank from the discharge part. And a switching mechanism capable of switching the quenching liquid from the pump to be supplied to the first tank and the second tank at the branch portion of the branch pipe. Bath. 2. A branch pipe is provided upward with its tip opening penetrating the bottom portion of the first tank, and a quenching liquid supply portion provided in the second tank is provided at the bottom portion of the tank. Claim 1
Quenching tank described.