JPS6346387Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a device for supporting shafts of an underground storage tank.

Generally, in an underground storage tank, receiving and discharging stored liquid is performed using a shaft extending from the top of the tank to the bottom. Usually, a plurality of shafts are used depending on the purpose of use, and conventionally, as shown in FIG.
types have been set up. Support device 4 for shaft 3
is the protective shaft 2 as clearly shown in Figures 2 and 3.
It consists of a pair of support fittings 5 fixed to the inner surface of the
The shaft 3 is supported by placing a protrusion 6 attached to the side surface of the shaft 3 on a mounting portion 7 on the support fitting 5. However, the shaft 3 of the underground storage tank 1 has a submerged oil pump 8 attached to its lower end, especially for discharging the oil.
In this case, as stipulated in the relevant regulations, it is mandatory that the piping be connected by a flange 9, so when removing the pump 8 while connected to the shaft 3 during maintenance. In the conventional shaft support device 4, the flange 9, pump 8, etc. come into contact with the support fitting 5. Therefore, in order to take out the shaft 3, it is necessary to shift the shaft 3 laterally to a position where it does not hit the support fitting 5 and then pull it up, which is time consuming and requires extra space for this purpose. There are disadvantages such as the protection shaft 2 becoming larger due to the increase in size.

Therefore, the purpose of this invention is to eliminate such drawbacks in the conventional art by rotatably supporting the support metal fittings so that when the shaft is taken out, it can be folded and moved only vertically upward without moving the shaft laterally. To provide a shaft support device which can be pulled up and taken out.

According to this invention, the shaft support device for an underground storage tank consists of a pair of supporting metal fittings that are pivoted on the surface of the structure in which the shaft for dispensing and receiving stored liquid is installed, and each supporting metal fitting is horizontally supported. It consists of a horizontal maintenance mechanism to maintain the shaft at a horizontal position, and a drive device to rotate the support fitting.The shaft is supported by placing the protrusion on the side of the shaft on the support fitting, and the shaft is supported when the shaft is taken out. It is constructed so that the metal fittings can be folded.

Other objects, features and advantages of the invention will become apparent from the detailed description below, taken in conjunction with the accompanying drawings.

FIG. 4 of the drawings shows a shaft support device for an underground storage tank according to this invention. In the illustrated embodiment, the shaft 3 for receiving and dispensing stored liquid includes a plurality of supporting devices 1 of this invention.
0 on the inner surface of the large diameter protective shaft 2. This support device 10 has a pair of support fittings 11 rotatably supported on the inner surface of the protection shaft 2. A guide plate 13 having an elongated hole 12 is fixed on the inner surface of the protective shaft 2 below the support fitting 11, and is provided with a slider 14 that slides along the elongated hole 12. A connecting rod 15 is connected between this slider 14 and the tip of the support fitting 11 with a pin or the like, so that the support fitting 11 is maintained horizontally when the slider 14 is at the lower end of the elongated hole 12. It's getting old. Further, by fixing the load receiving metal fitting 16 on the inner surface of the protective shaft 2 so as to contact the lower side of the slider 14, a larger load can be supported. In order to rotate this support fitting 11, a hydraulic jack 18 as shown in FIG. 5 is provided.

In the shaft support device 10 of this invention configured in this manner, the shaft 3 is supported by placing two protrusions 6 fixed to opposite sides of the shaft 3 on the mounting portions 17 of the support fittings 11, respectively. be done. When removing shaft 3 from the tank,
First, the shaft 3 is slightly pulled up vertically, and the hydraulic jack 18 is operated to lower the support fitting 11.
Fold it vertically. By doing so, the shaft 3 can lift its flange 9, pump, etc. vertically upward without being hindered by the shaft support device 10.

Further, in this embodiment, the rotation of the support fitting 11 was made by the hydraulic jack 18, but as shown in FIG. The supporting metal fitting 11 may be moved by pulling it with a winch or the like.

Furthermore, although the shaft 3 is provided within the protective shaft 2, it goes without saying that it may be supported by a structure such as a tank side wall.

As described above, according to this invention, by making the supporting metal fitting on which the protrusion on the side surface of the shaft is placed and supported rotatable, the supporting metal fitting can be folded toward the structure when the shaft is taken out, and the shaft can be left as it is. By simply pulling it up vertically from its position, the flange, pump, etc. can be easily taken out of the tank without being obstructed by the support device. Further, since there is no need to move the shaft in the lateral direction, there is no need to provide extra space for this purpose, and there is an advantage that when the shaft is provided within the protection shaft, there is no need to increase the size of the protection shaft.

[Brief explanation of the drawing]

Fig. 1 is a schematic sectional view of a general underground storage tank, Fig. 2 is a plan view showing a part of the shaft supported by a conventional shaft support device, Fig. 3 is a front view of Fig. 2, and Fig. 4 is a schematic sectional view of a general underground storage tank. The figure is a perspective view showing a part of the shaft supported by the shaft support device according to this invention, Figure 5 is a schematic explanatory diagram showing the support fitting rotated by a hydraulic jack, and Figure 6 is a diagram showing the support fitting rotated. FIG. 4 is a schematic explanatory diagram showing another example in which a wire is used for the purpose. In the figure, 1: underground storage tank, 2: protective shaft, 3: shaft, 4, 10: shaft support device, 5, 11: support metal fittings, 6: protrusion, 7, 1
7: Placement part, 9: Flange, 12: Long hole, 13:
Guide plate, 14: Slider, 15: Connecting rod, 18: Hydraulic jack.

Claims (1)

[Scope of utility model registration request] In an underground storage tank, a pair of supporting metal fittings are pivotally supported on the surface of a structure in which a shaft for dispensing and receiving stored liquid is provided, and a horizontal maintenance mechanism for maintaining each of the supporting metal fittings horizontally; It consists of a drive device for rotating the support metal fitting, and the shaft is supported by placing the protrusion on the side of the shaft on the support metal fitting, and the support metal fitting can be folded when the shaft is taken out. Shaft support device for underground storage tanks.