JPH06109551A - Cooling unit for temperature measurement - Google Patents

Abstract

PURPOSE:To measure temperature stably even in high temperature atmosphere by providing a concentric cooling pipe, to be inserted with a thermometer, with cooling means for feeding cooling medium. CONSTITUTION:A cooling pipe 1 has a base part coupled with a base body 3 having a flange part 3a. Cooling medium, e.g. water or gas, is introduced through an introduction port 31 of the base body 3 into a third pipe 13 thence returned through a communicating part 14 and a second pipe 12 to the base body 3 side where it is discharged through a discharge port 32 thus cooling a thermometer 4 inserted into a first pipe 11. An optical or electrical signal is delivered from the base part 40 of the thermometer 4. Since the thermometer 4 is cooled through a cooling unit including the cooling pipe 1 and further cooled through a heat transmission pipe 2 having high thermal conductivity being provided as required, the thermometer 4 comprising an optical fiber or the like is not heated but cooled sufficiently. This constitution protects the coating of optical fiber against evaporation or damage while removing stray light from the intermediate part thus allowing stabilized temperature measurement with reduced error.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION This invention relates to an optical fiber thermometer,
The present invention relates to a thermometer such as a thermocouple and a cooling device for a temperature sensor.

[0002]

2. Description of the Related Art When measuring temperature, a thermometer is used which collects radiant energy by an optical fiber and measures the temperature.
Further, a contact thermometer such as a sheath thermocouple is used for temperature measurement in a high temperature atmosphere.

[0003]

When such an optical fiber thermometer or contact type thermometer is used in a high temperature atmosphere, devitrification phenomenon occurs in which the optical fiber becomes opaque and becomes brittle, or the insulating agent in the sheath is broken. There is a risk that the insulation resistance will decrease and a leak phenomenon will occur, leading to measurement errors, and there is a limit to heat resistance, etc., and cooling is necessary.

In view of the above points, an object of the present invention is to provide a temperature measuring cooling device capable of stably measuring temperature even in a high temperature atmosphere.

[0005]

According to the present invention, there is provided a thermometer having at least one of a heat transfer tube provided on the tip side and a cooling tube provided on the base side and a thermometer positioned inside. And a second pipe concentrically provided on the outer circumference of the first pipe, and a concentric pipe on the outer circumference of the second pipe. A third tube provided in a shape of a tube, the first tube having an open end, the second tube and the third tube having closed ends and communicating with each other. And a cooling device for temperature measurement, characterized in that a cooling medium is passed through the third pipe, a heat transfer pipe having a thermometer inside, and a cooling means provided at the base of the heat transfer pipe. It is a cooling device for temperature measurement which is equipped with.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a structural explanatory view showing an embodiment of the present invention.

In the figure, reference numeral 1 is a cooling tube, and a thermometer (temperature sensor) 4 such as a fiber thermometer or a sheath thermocouple covered with a metal tube or the like at the center is inserted and positioned inside.
Tube (inner tube) 11, a second tube (middle tube) 12 concentrically provided on the outer circumference of the first tube, and a third tube concentrically provided on the outer circumference of the second tube. It consists of a tube (outer tube) 13 and has a first
The tip of the tube 11 is open, and the second and third tubes 12,
The tip of 13 is closed and communicates with each other through a communicating portion 14. Further, the heat transfer tube 2 is provided on the tip side, and the tip of the thermometer 4 inserted into the first tube 11 is the tip of the heat transfer tube 2. And the light is collected or temperature is measured. For example, the outer diameter of the third pipe 13 of the cooling pipe can be reduced to 3.6 mm, the inner diameter of the first pipe 11 can be reduced to 1.2 mm, and the outer diameter of the thermometer 4 can be reduced to 1 mm.
The thermometer 4 can be inserted and removed freely and is easy to handle.

The base portion of the cooling pipe 1 is a flange portion 3 for mounting.
The cooling medium W such as water or gas is connected to the base body 3 having a and is introduced into the third pipe 13 from the introduction port 31 of the base body 3. The inside of the second pipe 12 is returned to the side of the base 3 and is discharged from the outlet 32 of the base 3 to cool the thermometer 4 inside the first pipe 11.
An optical signal or an electrical signal is output from the base portion 40 of the thermometer 4.

As described above, since the thermometer 4 is cooled by the cooling device including the cooling pipe 1 and is cooled by using the heat transfer pipe 2 having good heat conduction provided as necessary, it is possible to use an optical fiber or the like. The thermometer 4 is sufficiently cooled without being heated,
It is possible to prevent volatilization and damage of the coating of the optical fiber, remove stray light in the middle part, and perform stable temperature measurement with little temperature error. Further, the outer diameter of the cooling pipe 1 can be made as small as a few mm or less, the outer shape of the sheath can be made thin with a sheath thermocouple, etc., and the cooling pipe 1 including the thermometer 4 can be formed into a bendable bendable shape, which is suitable for various purposes. it can.

The length L1 of the heat transfer tube 2 provided on the tip side and the length L2 of the cooling tube provided on the base side are required.
Any length may be set according to the application. L1 =
It may be 0 or L2 = 0.

FIG. 2 is a schematic diagram showing another embodiment of the present invention, in which only the heat transfer tube 2 in which the thermometer 4 is located is connected to the base body 3. This base 3 has an inlet 3
1. Cooling means for flowing the cooling medium W through the outlet 32 is provided. That is, in this example, by projecting the heat transfer tube 2 and cooling the base portion 3, the heat transfer tube 2 is cooled, the thermometer 4 is cooled and protected, and an error due to heating in the middle is also prevented. In this case, it is possible to prevent a failure due to water leakage or the like. Further, the cooling effect can be enhanced by providing the heat insulating material 5 on the outer side of the heat transfer tube 2.

[0012]

As described above, according to the present invention, since the thermometer is cooled by using the cooling pipe or the heat transfer pipe, the thermometer can be sufficiently cooled, its damage can be prevented, and the intermediate There is no effect of heating and stray light in the part, and stable and highly accurate temperature measurement is always possible.

[Brief description of drawings]

FIG. 1 is a structural explanatory view showing an embodiment of the present invention.

FIG. 2 is a structural explanatory view showing another embodiment of the present invention.

[Explanation of symbols]

 1 Cooling Pipe 2 Heat Transfer Pipe 3 Base 4 Thermometer 5 Heat Insulating Material 11, 12, 13 Pipes

Claims (3)

[Claims] 1. A cooling device for temperature measurement, comprising at least one of a heat transfer tube provided on the tip side and a cooling tube provided on the base side, and a thermometer located inside. 2. A first tube into which a thermometer is inserted in the center, a second tube concentrically provided on the outer circumference of the first tube, and a concentric tube provided on the outer circumference of the second tube. A third tube provided with the first tube, the first tube having an opening at the tip, the second tube and the third tube
The cooling device for temperature measurement, wherein the tip of the pipe is closed and communicated with each other, and a cooling medium is passed through the second pipe and the third pipe. 3. A heat transfer tube having a thermometer inside,
A cooling device for temperature measurement, comprising a cooling means provided at the base of the heat transfer tube.