JPS6139239B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a mixer for stirring crude oil in a storage tank, particularly an underground or semi-underground storage tank.

Tanks for stockpiling crude oil have traditionally been installed on land, but due to safety and national policies, they are now being replaced with underground or semi-underground tanks. On the other hand, the crude oil in the tank contains sludge consisting of various components, and there is a problem in that the sludge settles and accumulates at the bottom of the tank. In conventional above-ground tanks, in order to prevent sludge from accumulating, a small chamber is provided on the outside of the tank's peripheral wall, and a mixer motor is installed inside this chamber, with a propeller facing inside the tank to agitate the crude oil.
The fluid from the pump was discharged from the nozzle and agitated by jet flow. However, in underground or semi-underground tanks, all or part of the outer circumference of the tank is buried underground, so
It is difficult to install the mixer motor outside the tank, and agitation using a jet has disadvantages such as the nozzle opening being small compared to the target liquid and maintenance after installation being impossible. In addition, when installed on the ground, there were problems with noise generated from the mixer and leakage of crude oil due to defects in the watertight structure of the mixer section.

Generally, suspended support type stirrers are used, for example, in
It is disclosed in Publication No. 132857. however,
Although such known techniques can be applied to tanks with a relatively long and slender shape, they are not very effective in tanks with a relatively flat shape such as crude oil storage tanks, and they are not very effective in preventing sludge from settling like crude oil. It's not a thing. Also, pulling the tank up to the center of the tank for maintenance makes subsequent work cumbersome. In particular, the structure for fixedly supporting the stirrer becomes complicated. For example, as described in Utility Model Publication No. 43-21010,
A technique has been disclosed in which a propeller is provided on the side surface of a tank, and the propeller shaft is supported by a ball bearing. However, in this technique, there is a problem with the seal between the ball bearing and the tank, and in the event that the seal wears out and a leak occurs, all the liquid in the tank must be drained, which is extremely inconvenient.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a storage tank mixer device that can be easily taken out from the tank and that can be firmly seated in the tank.

The storage tank mixer device according to the present invention is a mixer device for stirring crude oil in an underground or semi-underground storage tank, in which a vertical guide rail is provided in the tank, and a support platform that is raised and lowered by a lifting device is attached to the guide rail. A mixer consisting of a motor and a propeller is provided on a support base, and a base is provided near the bottom of the tank, and a protrusion engages with the top surface of the base and the bottom surface of the support base. A recessed portion is provided respectively.

Therefore, the support base on which the mixer is placed is lowered from above the tank along the lifting device and positioned on the base. Then, the protrusions and the recesses engage with each other, so that the torque generated on the support base due to the rotation of the propeller does not displace the support base from the base due to the engagement between the protrusions and the recesses, allowing suitable stirring work to be performed. . Therefore, it is easy to attach and detach the mixer, maintenance and inspection are simple, and the support base can be held securely by simply placing the mixer on the base.
Moreover, it can be easily attached to the tank.

When carrying out the present invention, it is preferable to provide the mixer on a rotatable mounting table relative to the stand that supports the mixer. By doing so, the direction of the liquid flow by the propeller can be changed. 2 more
The stirring effect is further improved by rotating the two mounting tables vertically and horizontally.

An embodiment of the present invention will be described below with reference to the drawings. In the figure, 1 is a storage tank for storing crude oil, which is completely buried underground. Two vertical guide rails 2 are provided within the tank 1 and supported by support rods 3 on the tank inner wall. A slider 4 of a support base 3 is slidably engaged with the guide rail 2, and a mixer 5 is placed on the support base 3. The mixer 5 includes a motor 6 and a propeller 7 connected to the motor 6, and the motor 6 is supplied with power from outside the tank 1 via an electric wire (not shown).
A lifting device 9 is provided on the upper exterior of the tank 1, for example on the roof 8, and a winch 10 of the lifting device 9 is provided.
The lower end of the wire 11 wound on
is raised and lowered along the guide rail 2. A base 12 is provided in the tank 1 at an appropriate height along the guide rail 2, preferably near the bottom of the tank 1. An engaging conical recess 14 is provided, and such a configuration allows the support 3 and the base 12 to engage smoothly.

Note that, contrary to the above, the protrusion 13 may be provided on the base 12 and the recess 14 may be provided on the support base 3, and the elevating device 9
is operated by a motor, but may also be operated manually, and the lifting device 9 may be provided on the support base 3. There is a spacing rod 1 between the guide rails 2.
5 is preferably provided, and the slider 4 may be one or several rollers rolling along the guide rail 2.

One embodiment of the present invention is configured as described above, and the support table 3 on which the mixer 5 is mounted is connected to the tank 1.
The base 1 is lowered from above by the lifting device 9.
2. Place and fix on top. Then, when power is transmitted to the motor 6 to rotate the propeller 7, the crude oil in the tank 1 is stirred, the liquid components are made uniform, and the sludge is dispersed in the crude oil and is prevented from accumulating at the bottom of the tank 1. . Furthermore, due to the rotational reaction of the propeller 7, the motor 6 and thus the support base 3 receive rotational torque and thrust force in a certain direction, but since they are engaged with the base 12, they do not sway unnecessarily, and the mixer remains stable. be driven.

In the embodiment shown in FIG. 4, the mixer 5 is supported by the support base 3 so as to be freely rotatable in the horizontal direction. That is, the mounting table 16 of the mixer 5 is the supporting table 3.
A moving means 18 such as a hydraulic cylinder is provided between the support table 3 and the mounting table 16 by a vertical pin 17.
is provided.

In the embodiment shown in FIG.
A first mounting table 21 is pivotally supported by a horizontal pin 20, and a moving means 22 such as a hydraulic cylinder is provided between the support table 3 and the mounting table 21.
A second mounting table 24 is pivotally supported by a vertical pin 23, and a moving means 25 is provided between the mounting table 24 and the support table 3.
is provided, and the mixer 5 is placed on the mounting table 24.

In the embodiment shown in FIG. 4, horizontal adjustment of the propeller of the mixer 5 is possible; in the embodiment of FIG. 5, vertical and horizontal adjustment of the propeller is possible; The operation is similar to the first embodiment.

As explained above, since the mixer is provided inside the tank, the present invention can be applied to underground tanks, prevents crude oil, etc. from leaking out of the tank through the mixer part, and reduces noise emitted from the mixer. The noise problem is solved by being shielded by the tank, and the desired stirring can be performed without clogging or insufficient stirring as with jet nozzles.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing an embodiment of a stock tank mixer device according to the present invention, FIGS. 2 and 3 are perspective views showing the main parts of FIG. 1, and FIGS. FIG. 7 is a diagram showing another embodiment of the invention. 1...Tank, 2...Guide rail, 3...Support stand,
5... Mixer, 6... Motor, 7... Propeller 9... Lifting device, 12... Base, 16, 21, 24... Mounting table, 17, 23... Vertical pin, 20... Horizontal pin, 1
8, 22, 25... transportation means.

Claims (1)

[Scope of Claims] 1. In a mixer device for stirring crude oil in an underground or semi-underground storage tank, a vertical guide rail is provided in the tank, and a support platform that is raised and lowered by a lifting device is raised and lowered along the guide rail. A mixer consisting of a motor and a propeller is provided on a support base, a base is provided near the bottom of the tank, and a projection is provided on the top surface of the base and a bottom surface of the support base, and the mixer is engaged with the projection. A mixer device for a storage tank, characterized in that a concave portion is provided respectively. 2. A mounting table is provided on the support table, which is pivotally supported by a vertical pin and can be rotated horizontally by a moving means,
A stock tank mixer device according to claim 1, wherein a mixer is provided on a mounting table. 3. A first mounting table is provided on the support table, which is pivotably supported by a horizontal pin and is rotatable in the vertical direction by a moving means; 2. The storage tank mixer device according to claim 1, wherein a movable second mounting table is provided, and a mixer is provided on the second mounting table.