JPH05139493A - Cooling water tank for cooling water supply apparatus - Google Patents

Abstract

PURPOSE:To make cleaning of a tank main body and an expansion tank executable separately and easily with corrosion-preventing treatment liquid after welding, and to make the treatment liquid discharged thoroughly by a method wherein connecting pipes are provided respectively to the tank main body and the expansion tank so that the pipes project from the tanks, and each of the connecting pipes is connected with each of connecting hoses. CONSTITUTION:A cooling water tank 1 is equipped with a tank main body 2 for storing a fixed quantity of cooling water and a water pressure-regulating expansion tank 4 that is integrally connected to the tank main body. A plurality of connecting pipes 23, 24 and 43, 44 are provided to the tank main body 2 and the expansion tank 4 so that the pipes project from the tanks. The connecting pipes 23 and 43 facing each other and the connecting pipes 24 and 44 also facing each other are connected respectively with a connecting hose 7 and a connecting hose 8 for ventilation, and thereby the tank main body 2 and the expansion tank 4 are connected in communication with each other. The tank main body 2 and the expansion tank 4 are cleaned with a treatment liquid after completion of welding that is applied to both the tanks. After that, the treatment liquid is discharged easily and thoroughly through a cooling water outlet 22 and an opening provided to the connecting pipe 44.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooling water supply device for circulating pure water as cooling water and used for cooling a laser device or the like.

[0002]

2. Description of the Related Art In this type of cooling water supply device, a cooling water tank for storing a fixed amount of cooling water is provided in the cooling water supply circuit. This cooling water tank is generally shown in FIG.
The ones shown in are well known. In the figure, 1 is a cooling water tank, 2 is a tank body connected to a cooling water supply circuit through a cooling water inlet portion 21 and an outlet portion 22, and 4 has a drain pipe 41 connected to an upper opening, Pipe 4
An expansion tank 5 connected to the tank body 2 through 2 and integrally installed above the tank body 2 is a water supply port having a cap 52 that is connected to the tank body 2 by a pipe 51 and that opens and closes an upper surface opening. In the expansion tank 4 and the water supply port 5, a ventilation pipe 6 connected to the tank main body 2 is connected.
Opens.

The cooling water tank 1 is made of metal such as the tank body 2, the expansion tank 4 and the water supply port 5, and the tank body 2, the expansion tank 4 and the water supply port 5 are the same metal connection pipe 42 and pipe 51. The ends of are joined together by welding. The cooling water tank 1 installed in the cooling water supply circuit stores the cooling water up to approximately the center of the connection pipe 42. Also, for example, when the pump is started, the cooling water temporarily pressurized is released to the expansion tank 4, and the cooling water is replenished by the water supply port 5
Always keep the amount of water under pressure in the cooling water supply circuit normal, for example.

[0004]

After the welding, the cooling water tank 1 is internally cleaned with a treatment liquid for preventing corrosion of the welded portion. However, the conventional cooling water tank has a drawback that it is extremely difficult to completely drain the processing liquid even if the tank is turned upside down or sideways, and the processing liquid remains in either the tank body or the expansion tank.

An object of the present invention is to provide a cooling water tank of a cooling water supply device which can easily draw out a treatment liquid whose inside is cleaned.

[0006]

In order to achieve the above object, according to the present invention, a tank body is provided in a cooling water supply circuit that circulates cooling water to an object to be cooled, and a tank body for storing a fixed amount of cooling water, and In a cooling water tank of a cooling water supply device comprising an expansion tank for adjusting water pressure integrally connected to the tank body, connecting pipes are projectingly provided on the tank body and the expansion tank, and both connecting pipes are connected. It shall be connected by a hose to connect the tank body and the expansion tank.

[0007]

The tank body and the expansion tank can be washed separately, and the washing liquid can be completely discharged from the respective openings.

[0008]

FIG. 1 shows an embodiment of the present invention.
Portions common to or the same as are indicated by the same reference numerals. In FIG. 1, the tank body 2 of the cooling water tank 1 and the expansion tank 4 are separately manufactured by sheet metal working and welding. Moreover, connecting pipes 23 and 24 are provided on the tank body 2 so as to project therefrom. On the other hand, the expansion tank 4 is provided with connecting pipes 43 and 44, and a water supply port 5 conventionally provided in the tank main body 2 is attached to the upper part thereof. Reference numeral 7 is a connection hose, and 8 is a ventilation connection hose.

In the above structure, the tank body 2 and the expansion tank 4 are separately washed with the processing liquid after the completion of welding. In this case, the separate tank body 2 and expansion tank 4 are both simple in shape, and the treatment liquid is easily and completely discharged from the cooling water outlet 22 and the connection pipe 44 opening. After cleaning, the connection pipes 23 and 43 are connected by the connection hose 7, and the connection pipes 24 and 44 are connected by a connection hose to form an air vent passage, and the water supply port 5
A removable cap is attached to the cooling water tank 1 to complete. The cooling water tank 1 is provided with the water supply port 5 on the expansion tank 4 to further simplify the overall structure and, as described above, can be easily washed with the treatment liquid after welding.

[0010]

According to the present invention, a tank main body, which is provided in a cooling water supply circuit for circulating cooling water to an object to be cooled and stores a constant amount of cooling water, and a water pressure integrally connected to the tank main body. In a cooling water tank of a cooling water supply device equipped with an adjustment expansion tank, connecting pipes are respectively provided on the tank main body and the expansion tank, and both connecting pipes are connected by a connecting hose to connect the tank main body and the expansion tank. Since they are connected in communication, it is easy to wash with the corrosion-preventing treatment liquid after welding is completed, and the treatment liquid can be completely withdrawn.

[Brief description of drawings]

FIG. 1 is a sectional view of a cooling water tank showing an embodiment of the present invention.

FIG. 2 is a sectional view of a conventional cooling water tank.

[Explanation of symbols]

 1 Cooling Water Tank 2 Tank Body 4 Expansion Tank 5 Water Supply Port 7 Connection Hose 23 Connection Pipe 43 Connection Pipe

Claims (2)

[Claims] 1. A tank main body, which is provided in a cooling water supply circuit for circulating cooling water to an object to be cooled and stores a fixed amount of cooling water,
And a cooling water tank of a cooling water supply device comprising a water pressure adjusting expansion tank integrally connected to the tank main body, connecting pipes projecting from the tank main body and the expansion tank, respectively. A cooling water tank for a cooling water supply device, characterized in that the tank body and the expansion tank are connected by a connecting hose so as to communicate with each other. 2. The cooling water tank according to claim 1, wherein a water supply port to the tank body is provided at an upper portion of the expansion tank.