JPS6238740Y2 - - Google Patents

Description

[Detailed Description of the Invention] (1) Field of the Invention This invention relates to a fluidized bed vessel used to calibrate temperature sensors such as thermocouples.

(2) Prior art A fluidized bed tank is used as a constant temperature bath with good temperature distribution by supplying air to powder such as alumina powder to make it fluid, then heating it with a heater to a predetermined temperature, for example. It is something.

In this case, the tank containing the powder must be tightly sealed and firmly fixed to prevent air from leaking, but at high temperatures of several hundred degrees, the difference in thermal expansion of the parts causes distortion, and even small gaps can cause There was a risk that air would leak and the powder would not be able to be fluidized.

(3) Purpose of the invention In view of the above points, the purpose of this invention is to provide a fluidized bed tank that prevents air leakage and is less affected by thermal expansion strain.

(4) Embodiment of the invention FIG. 1 is a configuration explanatory diagram showing an embodiment of the invention.

In the figure, 1 is an inner tank having a flange 1a and an exhaust pipe 1c at the upper part and a diffusion plate 2 at the lower part, 3 is a powder such as alumina powder stored in the inner tank 2, and 4 is a sensor insertion pipe 4a. An upper lid 5 that protrudes downward and seals the inner tank 1 has a flange 1a of the inner tank 1 on the upper part.
The outer tank 7 has a flange 5a that is fastened to the outer tank 5 and is attached to the mounting plate 6 by the flange 5b.
8 is a heater provided between the inner tank 1 and outer tank 5; 9 is a heat insulating material 10;
11 is a control sensor.

In other words, the outer tank 5 is attached to the flange 5 by the mounting plate 6.
The inner tank 1 is suspended while being supported at one point by fastening the flange 1a to the flange 5a of the outer tank 5, and the inner tank 1 is suspended while being supported at one point. In addition to making it a closed space, the inner tank 1,
This is intended to absorb strain caused by differences in thermal expansion caused by material and temperature differences between the outer tanks 5.

To use, insert the sensor insertion tube 4a in the upper lid 4.
A sensor is inserted into the chamber, and air for fluidization is sent from the air pipe 7 to the powder 3 in the inner tank 1 via the outer tank 5 and the diffusion plate 2 while being preheated by the heater 8. Then, the powder 3 is brought into a fluidized state, and the control sensor 11
The heater 8 is controlled to a predetermined temperature by
Used as a temperature bath for temperature calibration with excellent temperature distribution and stability.

Note that the flanges 5a and 5b are one,
Fasten the inner tank 1 and outer tank 5 to the mounting plate 6 at the same location,
It may be fixed at one point.

Further, instead of the double structure of the inner tank 1 and the outer tank 5, a triple or quadruple structure may be fixed in the same manner.

(5) Summary of the invention This invention comprises an inner tank for storing powder, and an outer tank for accommodating this inner structure and introducing air from the lower part of the inner layer. This is a fluidized bed tank in which the upper flange is fastened and lowered.

(6) Effects of the invention The air between the inner tank, outer tank, or between the inner tank and the outer tank can be completely sealed by fixing the upper flange, making it easy to prevent leakage of fluidized air. .

The inner tank and outer tank are fixed and fastened by the upper flange and suspended, so even if they expand separately, there is no risk of distortion and damage, resulting in greater safety and better material protection. Free choice.

[Brief explanation of the drawing]

FIG. 1 is a configuration explanatory diagram showing an embodiment of this invention. 1...Inner tank, 3...Powder, 5...Outer tank, 6...
Mounting plate, 1a, 5a, 5b... flange.

Claims (1)

[Scope of utility model registration request] An inner tank that houses the powder and inserts a temperature sensor for calibration, a heater that heats this inner tank from the outside, and a diffuser plate at the bottom of the inner tank that houses the heater and the inner tank and supplies air to it. 1. A fluidized bed tank characterized in that the tank has a structure in which the upper flanges of the inner tank and the outer tank are connected and suspended, and the temperature sensor is calibrated by setting the inner tank to a predetermined temperature.