JPS61126440A - Temperature measuring device - Google Patents

Abstract

PURPOSE:To take a measurement securely without any influence of a high- temperature radiator by providing a cooling means which cools a cylinder wherein fluid to be measured flows to specific temperature and calculating a temperature value at which the temperature measured value of the object body coincides with the temperature measured value of the cylinder. CONSTITUTION:The 1st thermocouple 10 are installed at the space part of the cylinder body 14 where gas 12 flows and the 2nd thermocouple 17 are installed nearby a cooling pipe 15 provided on the side wall of the cylinder body 14. Then, when the radiator 13 having the quantity Qr of heat at temperature T1 is present nearby the cylinder body 14, the quantity Qg of cooling heat of a cooling material 16 supplied to the cooling pipe 15 is set to a specific value at which the heat conduction between the 1st thermocouple 10 and cooling pipe 15 is eliminated, and then the temperature T2 of the cooling pipe 15 is made coincident with the temperature measured value Tm of the 1st thermocouple 10. Consequently, the temperature measure value Tm is obtained as the actual temperature Tg of the gas 12 after the influence of the radiator 13 is removed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a temperature measuring device, in particular for measuring the temperature of a gaseous fluid.

[Prior Art] Conventionally, in order to measure the temperature of gas, a temperature measuring device using a thermal lightning pair 10 as shown in FIG. 3, for example, is often used. This temperature measuring device is configured to maintain one end of the thermal lightning pair 10 at a constant temperature (cold junction) and determine the temperature of the other end 11 (hot junction) by measuring the thermoelectromotive force between the terminals. ing.

When the other end 11 approaches the gas fluid 12 as shown in FIG. 3, the temperature Tm of the other end 11 and the temperature TO of the gas fluid 12 match. For this reason, other f41
By determining the concentration Tm of 1, it becomes possible to determine the temperature To of the gas fluid 12, which is the fluid to be measured.

[Problems to be Solved by the Invention] By the way, if a high-temperature radiator 13 exists near the thermocouple 10, the amount of heat Qr of the radiator 13 is transmitted to the thermocouple 10, which adversely affects the temperature measurement of the gas fluid 12. This will affect the Specifically, a situation occurs in which the temperature To of the gas fluid 12 to which the amount of heat Qc of the thermocouple 1o is transferred does not match the temperature Tm of the thermocouple 1o. For example, the radiator 13
If the temperature T1 of is greater than the temperature TQ of the gas fluid 12,
The concentration Tg becomes smaller than the temperature Tm of the thermocouple 10. Conversely, when temperature T1 is smaller than temperature TO, temperature Tg becomes larger than temperature Tm of thermocouple 10.

The purpose of the present invention is to solve the above-mentioned problems, and it is possible to reliably measure the temperature of a fluid such as gas even when a high-temperature radiant is present close to the temperature measurement range. The objective is to provide a temperature measuring device that can.

[Means and effects for solving the problems] The present invention provides a cooling means for cooling the cylinder through which the temperature-measuring fluid flows to a predetermined temperature, and the temperature measurement value of the temperature-measuring fluid and the cylinder body are combined. It is configured to find a temperature value that matches the measured temperature value.

With such a configuration, even when heat is transmitted from the radiant to the cylinder, the influence of the radiant can be removed, and the temperature of the temperature-measuring fluid can be reliably measured.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings. 1st
The figure is a perspective view showing the configuration of a temperature measuring device according to an embodiment. In FIG. 1, the cylindrical body 14 is a temperature-measuring section through which a temperature-measuring fluid, for example, a gas fluid 12, is introduced and flows. A first thermocouple 10 for measuring the temperature of the gas fluid 12 is installed in the space of the cylinder 14 . A cooling pipe 15 is installed on the side wall of the cylinder 14, and a coolant 16 at a predetermined temperature is supplied to the cooling pipe 15. Furthermore, a second thermal lightning pair 17 for measuring the temperature of the cooling pipe 15 is installed on the side wall of the cylindrical body 14 .

In the temperature measuring device having such a configuration, the effects of this embodiment will be explained with reference to FIG. 2. First, gas fluid 1
2 is introduced into the cylindrical body 14, and at the same time, a coolant 16 at a predetermined flow rate and temperature is supplied to the cooling pipe 15. Here, as shown in FIG. 1, it is assumed that a radiator 13 with a temperature T1 and a heat amount Qr exists at a relatively close position outside the cylindrical body 14. Therefore, the amount of heat from the radiator 13 is transmitted to the side wall of the cylindrical body 14, and the temperature of the side wall increases.

In the above state, if the amount of cooling heat of the coolant 16 supplied to the cooling pipe 15 is smaller than the predetermined value QO, the temperature T2 of the cooling pipe 15 (that is, the second thermocouple 17 (temperature measurement value Tm) becomes higher due to the radiator 13 and is higher than the temperature measurement value Tm of the first thermal lightning pair 10. Furthermore, since heat is transferred to the first thermal lightning pair 10 from the cooling pipe 15, its measured value Tm becomes higher than the actual temperature To of the gas fluid 12. Conversely, when the cooling heat amount of the coolant 16 is larger than the predetermined value Qg, the temperature T2 of the cooling pipe 15 becomes low and lower than the temperature measurement value Tm of the first thermocouple 10.

At this time, since heat is transferred from the first thermocouple 10 to the cooling pipe 15, the temperature measurement value Tm of the first thermocouple 10 becomes lower than the actual temperature TO of the gas fluid 12.

When the amount of cooling heat of the coolant 16 is a predetermined value QQ, the cooling pipe 1
The temperature T2 of No. 5 and the temperature measurement value Tm of the first thermocouple 10 match as shown in FIG.

That is, the amount of cooling heat Qq of the coolant 16 is a set value that can eliminate the influence of radiant heat from the radiator 13 and the heat transfer between the first thermal lightning pair 10 and the cooling pipe 15. This results in
A temperature measurement value Tm that corresponds to the temperature T2 of the cooling pipe 15 can be determined as the actual temperature Tg of the gas fluid 12.

In this way, if the radiator 13 is present, the cooling pipe 1
By adjusting the amount of cooling heat (determined by the flow rate and temperature) of the coolant 16 supplied to the cooling pipe 1 to a predetermined value,
5 can be made to match the temperature measurement value Tm of the first thermal lightning pair 10. By confirming this coincident state from each temperature measurement value of the first and second thermocouples, the actual temperature Tg of the gas fluid 12 from which the influence of radiation from the radiator 13 has been removed can be determined from the first thermocouple 10. It can be obtained as a temperature measurement value.

In the above embodiments, the cylinder 14 is assumed to be a straight cylinder, but is not limited to this, and may be a bent cylinder or a rectangular cylinder.

[Effects of the Invention] As described in detail above, according to the present invention, the temperature of a fluid such as gas can be reliably measured even when a high-temperature radiator exists close to the temperature measurement range. Therefore, if the present invention is applied, it will be extremely effective when measuring the temperature of a fluid such as gas in a place where a radiant such as a flame is present.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing the configuration of a temperature measuring device according to an embodiment of the present invention, Fig. 2 is a characteristic diagram for explaining the effects of the embodiment, and Fig. 3 is a diagram of a conventional temperature measuring device. FIG. 3 is a diagram for explaining the operation. 10, 17...Thermocouple, 13...Radiator, 14...
- Cylindrical body, 15... Cooling pipe, 16... Coolant. Applicant Sub-Agent Patent Attorney Takehiko Suzue Figure 1

Claims (1)

[Claims] A cylindrical body through which a fluid to be measured is introduced and flows; a cooling means for cooling the cylindrical body to a predetermined temperature; and a first temperature measuring means for measuring the temperature of the fluid to be measured passing through the cylindrical body. and a second temperature measuring means for measuring the temperature of the cylindrical body cooled by the cooling means; A temperature measuring device characterized in that it obtains a temperature measurement value of a temperature measuring fluid.