JPS58179114A - Method of preventing blind movement of bellows type cell in of cable oil feeding tank assembling process - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for assembling a refueling tank for an OF (oil-filled) cable to prevent undesired movement of a pearse type cell.

The oil tank for OF cables has a built-in bellows-type cell that can expand and contract up and down, and has good responsiveness to oil fluctuations, making it easy to monitor the amount of oil by using the expansion and contraction action of the cell. The bellows type has various advantages such as being easy to carry out, and from this point of view, the bellows type is attracting attention.

Below, the outline and main assembly process of the bellows type oil tank will be explained based on drawings, and the problems will be pointed out.

Figure 1 shows the disassembled state of the main components of the oil tank. is a bellows type cell.

Furthermore, in Fig. 1, P□ and P2 are the welds between the lid (2) and the cell (4), and P3 and P4 are the welds between the fuel tank body (1) and the lid (2). .

However, in the cell attachment process of attaching the cell (4) to the lower surface of the lid (2), the lid (2) equipped with the cell (4) is attached to the upper surface of the fuel tank main body t1. In the attachment process, the welding part is welded with at least the lid passage and the bottom of the lid (2) in an upright position, so that the cell (4) is not forcibly stretched or subjected to lateral bending. Ivy may undergo plastic deformation and become unable to expand or contract or break.

In view of the above-mentioned problems, the present invention fixes the cell to the lid body with a screw until the cell attachment process and the lid attachment process are completed, thereby maintaining the contracted state of the cell. This is to prevent the inability to expand or contract or damage.

Next l To explain this specifically, the lower surface of the lid body (2)
In the cell attachment process of attaching the cell (4), the cell (4) is contracted as shown in Fig. 2, and the cell (4) in the contracted state has a lid with the welded parts P1 and P2 aligned with each other. It comes into contact with the lower surface of the body (2) and is fixed to the lid body (2) via a screw (5) such as a bolt to maintain the same state.

As shown in Fig. 2, both of the above (21 [4)] are held in a state where the lid surface and the cell bottom surface are in an upright shape, and in this state, the welded parts P, , P, are TIG welded. Attached to each other.

Next, in the lid attachment step of attaching the lid (2) equipped with the cell (4) to the top surface of the fuel tank body (11), as shown in FIG. The lid body (2) is attached to the top surface of the fuel supply main body (1) so that P4 overlaps each other, and in this case as well, the bottom surface and the lid surface of the fuel tank are held in an upright shape 11i, and the image contact portions P3, P4 is TIG welded.

Until both of the above steps are completed, the cell (4) is attached to the lid (2).
Since the cell (4) is fixed by the screw (5), it is possible to prevent the cell (4) from being forcibly stretched or subjected to lateral bending, resulting in plastic deformation or destruction.

After completing these steps, the cell (4) is attached to the fuel tank body (1
) is built in the main body +1+, and the opening (3) is closed within the main body +1+, so that the airtightness within the fuel tank main body m is maintained.

After that, normally, in the instrument mounting step I shown in FIG. 4, a measuring mechanism (6) such as a liquid level gauge is assembled into the lid (2).

That is, a gas pressurizing means (7) such as an air injector or a gas cylinder is connected to the communication port (1)' attached to the pulp t1+' of the oil supply tank body (1). This means (7) is shown in FIG. 4 for convenience. ), the desired gas is pressurized into the fuel tank main body (1) by the gas injection means (7) to maintain the contracted state of the cell (4).

In such a case, the contracted cell (4) in the fuel tank main body Fil receives the entire gas pressure and is strongly and stably supported, so it is completely impossible for the cell +41 to move randomly. This will be prevented.

In this way, the cell (4) is kept in a contracted state, the screw (5) is removed, and a measuring mechanism (6) such as a liquid level gauge is installed on the lid (2), and the instrument installation process is carried out. Until the process is completed, the cell (4) is kept in a contracted state, and after the process is completed, the pulp (1)' is opened and the gas in the oil tank body (11) is gently removed. The cell (4) returns to its natural extension state while exhibiting a quiet state.

In addition, in order to maintain the contracted state of the cell during the meter installation process, an IJJC wire may be installed in the bottom of the cell. used as a part to detect

After the measuring mechanism is incorporated into the lid, oil or gas is injected into a predetermined portion of the oil tank and the tank is put into practical use.

As explained above, the present invention includes a cell attachment process of attaching a bellows-type cell that is vertically expandable and retractable corresponding to the opening to the lower surface of a fuel tank lid having an opening, and a lid equipped with the cell. In the method for assembling a fuel tank for an OF cable, which includes a lid attachment process for attaching the body to the top surface of the fuel tank body, the cell is not attached until the lid attachment process is completed. The cell retains its contracted state by being fixed to the lid via screws, which prevents the cell from moving accidentally when assembling the fuel tank, causing the cell to plastically deform and become unable to expand or contract or break. There is no fear, and the contribution to implementing this type of assembly method is significant.

Figure 1 is an exploded cross-sectional view of the main components of an oil tank for OF cables, Figures 2 and 3 are schematic cross-sectional views showing the method of the present invention, and Figure 4 is a schematic cross-sectional view showing the instrument installation process. be.

(1)・・・Refueling tank (1)'...Fist communication port (1) I...e pulp (2)・・・Lid body (3)...Opening (4)・e@-self-bellows type cell (5)・・・Neji (6)・・・Measurement mechanism (7)・・・Gas pressure injection means patent applicant Agent: Patent Attorney Makoto Ifuji No. 17

Claims (1)

[Claims] A cell attachment step 1 in which a bellows-type cell that is vertically expandable and retractable corresponding to the opening is attached to the bottom surface of the fuel tank lid body having an opening, and the lid body with the cell is attached to the top surface of the fuel tank body. A method of assembling an oil tank for an OF cable, which includes a lid attachment process for attaching the cell to the lid body. O characterized by maintaining the contracted state S of the cell by fixing it with
A method for preventing the bellows type cell from moving inadvertently in the F cable oil tank assembly method.