JPH0526898U - Liquid storage tank - Google Patents

Abstract

(57) [Summary] [Structure] A super structure composed of a stirring nozzle 4 for circulating liquid in a tank, an ultrasonic level meter 2 provided on a lid 1 at the top of the tank, and a baffle plate 5 provided at the lower center of the tank. Sound wave level meter 2
Liquid storage tank with. [Effect] A baffle is installed near the center of the bottom of the tank that circulates and agitates the liquid in the tank to flatten the liquid in the tank and normally reflect the ultrasonic waves from the ultrasonic level meter to the receiving section of the ultrasonic level meter. The function of the ultrasonic level meter can be demonstrated without any problems.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a liquid storage tank.

[0002]

[Prior Art]

 Conventionally, the level measurement of liquid storage tanks is generally performed with a differential pressure type or a direct-viewing type level meter, and the shape and action of the liquid due to circulating stirring do not affect the function of the level meter.

[0003]

[Problems to be solved by the device]

 The liquid storage tank circulates and agitates the stored liquid as a means to uniformly mix and melt the liquid and solids in the tank in order to dissolve and transfer the solids mixed in the tank. Therefore, as described above, a differential pressure type or a direct-viewing type level meter is generally used for the level measurement of the conventional liquid storage tank.

However, in order to improve the reliability of operation and the reliability of communication, it is necessary to perform remote operation in addition to automatic operation of the system, and an ultrasonic level meter is used. Harmonization has become an issue.

[0005]

[Means for Solving the Problems]

 When the liquid in the tank is circulated and agitated in this way, a dent is created in the upper part of the liquid in the tank, and the ultrasonic waves emitted from the ultrasonic level meter are reflected at the sloped part of the dent, and the ultrasonic characteristics The function of the ultrasonic level meter cannot be exhibited because it does not return to the receiving section of the ultrasonic level meter that I expected.

Therefore, it is necessary to have a tank structure that can obtain the function of an ultrasonic level meter while circulating and stirring, and a baffle plate is installed near the center of the liquid inside the tank to remove the dent in the upper part of the liquid inside the tank with an ultrasonic level meter. We devised a structure that is extremely small.

[0007]

[Action]

 By installing a baffle plate near the bottom of the center of the tank of the ultrasonic level meter inside the liquid, the dent on the upper part of the liquid inside the tank with the ultrasonic level meter can be minimized, so that the ultrasonic level meter can be used on a nearly flat surface. The ultrasonic waves emitted from the ultrasonic wave are reflected and received by the receiving section of the ultrasonic level meter, and the function of the ultrasonic level meter can be exhibited.

[0008]

【Example】

 Next, an embodiment of the present invention will be described with reference to FIGS. 1 to 5 and 7.

In the figure, an ultrasonic level meter 2 is installed on a tank lid 1.

A liquid discharge nozzle 3 is provided at the bottom of the tank, and a circulation nozzle 4 is formed in the tank.

When the liquid is jetted from the circulation nozzle 4 by an external pump and the liquid stored in the tank is circulated, in the case where the structure has no baffle at the lower part of the tank as shown in FIG. The ultrasonic waves emitted from the ultrasonic level meter due to the dents on the surface are not reflected in the direction of the ultrasonic level meter and cannot function as the ultrasonic level meter.

In a tank having a baffle plate 5 near the center of the tank liquid as shown in FIGS. 1 to 5, the ultrasonic waves emitted by the dents on the upper part of the tank are minimized and are reflected in the direction of the ultrasonic level meter. The function of an ultrasonic level meter can be exerted because it shoots.

The baffle plate should be installed at a level below the minimum liquid level during operation so that ultrasonic waves are always reflected on the liquid surface.

[0014]

[Effect of the device]

 According to the present invention, since the dent in the upper part of the liquid in the tank can be minimized, the ultrasonic wave emitted from the ultrasonic level meter is reflected on the almost flat liquid surface and is received by the receiving part of the ultrasonic level meter. The function of the ultrasonic level meter can be demonstrated.

[Brief description of drawings]

FIG. 1 is a sectional view of a tank having a baffle at the bottom of the tank according to the present invention.

FIG. 2 is a sectional view taken along the line II-II of FIG.

FIG. 3 is a sectional view of a tank having a baffle at the bottom according to the present invention.

FIG. 4 is a sectional view of a tank having a lower baffle according to the present invention.

FIG. 5 is a cross-sectional view taken along the line VV of FIGS. 3 and 4.

FIG. 6 is a system diagram around the tank.

FIG. 7 is a system diagram of a tank having no baffle at the bottom of the tank.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Tank lid, 2 ... Ultrasonic level meter, 3 ... Liquid discharge nozzle, 4 ... Stirring nozzle, 5 ... Baffle plate, 6 ... Tank body plate, 7 ... Stay.

Front Page Continuation (72) Inventor Toshikatsu Imaizumi 3-2, 3-chome, Sachimachi, Hitachi City, Ibaraki Prefecture Hitachi New Clear Engineering Co., Ltd. No. 2 within Hitachi New Clear Engineering Co., Ltd. (72) Inventor Yoshio Uchiyama 3-1-1, Saiwaicho, Hitachi-shi, Ibaraki Hitachi Ltd. Hitachi factory

Claims (2)

[Scope of utility model registration request] 1. A liquid storage tank comprising an ultrasonic level meter provided on a lid at the top of the tank, a liquid discharge nozzle provided at the bottom of the tank, and a stirring nozzle provided in the tank. 2. The liquid storage tank according to claim 1, wherein a baffle plate is provided at a lower portion of the center of the tank.