JPH11223561A - Temperature measuring probe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a temperature measuring probe which can be scraped easily. SOLUTION: In a temperature measuring probe composed of a probe 1 which is inserted into a furnace through a measurement hole 52 formed through the wall 51 of the furnace, with the base-side end of a protective tube 11 being positioned on the outside of the furnace, while a temperature detecting element is housed in the tube 11 and a connector 2 which is extended from the tube 11 and connects the probe 1 to the temperature detecting element, the outside diameters of the tube 11 and connector 2 are made smaller than the diameter of the measurement hole 52 over the full lengths of the tube 11 and connector 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a temperature measuring probe for detecting a temperature inside a furnace and deriving a temperature detection signal outside the furnace.

[0002]

2. Description of the Related Art Conventionally, in general, in order to measure the temperature inside a furnace or a boiler, a temperature measurement hole penetrating a furnace wall or a boiler wall (hereinafter, simply referred to as "furnace wall") is used. A probe is inserted, the temperature inside the furnace is detected, and a temperature detection signal is led out of the furnace.

[0003] This temperature measuring probe is connected to a conductor via a connector head.

[0004]

In the conventional temperature measuring probe, the protection tube is corroded, the protection tube is broken, the temperature detecting element is deteriorated, and the insulation of the insulating material is reduced. It must be replaced with a new temperature measuring probe. When replacing the temperature measurement probe, it is necessary to pull out the temperature measurement probe that was inserted in the measurement hole.In this case, in a garbage incineration plant, etc., deposits may adhere to the protection tube inserted inside, especially if the protection tube is inserted. The tube was bent and it was not easy to pull it out of the furnace.

In a conventional temperature measuring probe, a connector head is used to connect a temperature measuring element housed in a protective tube to a conducting wire, and the temperature of the probe is connected to the protective tube. The outer diameter is different between the temperature-sensitive portion at the distal end of the measurement probe and the connector head at the base end, and since the connector head has a large diameter, it is common to pull it out of the measurement hole when replacing it. However, as described above, deposits adhere to the protection tube, the protection tube is bent, and the temperature-sensitive part cannot be pulled out from the measurement hole. Often it is dropped in a furnace and discarded, and only the proximal connector head is collected.

[0006] In addition, the connection of the conductor to the connector head has been performed by inserting a crimp terminal at the tip of the conductor through a screw. In addition, the attachment of the temperature measurement probe to the tube wall is performed by tightening with a bolt, and the attachment is not always easy.

[0007]

SUMMARY OF THE INVENTION In view of the above circumstances, the present invention has been made in consideration of the above circumstances, and in order to simplify disposal of a temperature measuring probe, a temperature detecting element is accommodated in a protective tube, and a furnace is inserted through a measuring hole in a furnace wall. In the temperature measurement probe consisting of a probe that is inserted into the inside and the base end of the protection tube is positioned outside the furnace, and a connector that connects the temperature detection element extending from the protection tube, the outer diameters of the protection tube and the connector are The temperature measurement probe was formed smaller than the diameter of the measurement hole.

Further, the present invention provides a temperature measurement method in which a probe and a connector are attached and detached by a method of inserting a pin and a connection pipe in order to simplify the connection between the probe and the connector and to facilitate disposal of the probe into the furnace. A probe was used.
Further, the present invention provides a temperature measurement probe having a detachable stopper provided on the outer periphery of a protective tube in order to facilitate mounting of the probe on the furnace wall.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below based on specific embodiments shown in the accompanying drawings. The temperature measurement probe of the present invention includes a probe 1 and a connector 2. The probe 1 accommodates a temperature detecting element such as a thermocouple wire 12 or a resistance temperature detector in a stainless steel protective tube 11 and extends the temperature detecting element from a base end. In this example, an example in which a thermocouple wire 12 is housed as a temperature detecting element will be described. Reference numeral 13 denotes a thermal contact which is a temperature sensing part.

[0010] The distal end of the protective tube 11 is closed, the base end is opened, a metal receptacle 14 is fitted and fixed therein, and a metal pin 17 is arranged in parallel in the receptacle 14. The inner part is closed with an insulating material 15 to form a space for receiving a plug 31 described later in the receptacle 14. The protective tube 1 is filled with a powdered insulating material 19, and a thread 20 is engraved on the exposed outer peripheral portion of the receptacle 14.

The connector 2 is provided with a plug 31 made of synthetic resin, which is fitted with the receptacle 14. Plug 31
At the position corresponding to the pin 17
Buried. Outward flange 33 on the outer periphery of plug 31
The connecting tube 32 and the conducting wire 35 are connected to the base end side of the plug 31, and the portion is molded 36. A nut 37 is externally fitted to the metal tube 34 between the mold 36 and the metal tube 34, and the nut 37 is provided so as to rotate and advance and retreat. A knurl 38 is engraved on the outer periphery of the nut 37 so that it can be easily gripped and rotated.

When this temperature measurement probe is inserted into the measurement hole 52 of the furnace wall 51, an annular groove 53 is cut into the base end of the protective tube 11 so as not to insert all of the probe. Is provided with a stopper 54 such as an E-ring. The stopper is not limited to the E-ring, but may be another stopper. FIG. 2 shows a state in which the stopper 54 is mounted.

In this temperature measurement probe, the plug 31 of the connector 2 is inserted into the receptacle 14 of the probe 1, the pin 17 is fitted to the connection pipe 32, and the nut 3 is
7 is screwed and fixed to a thread 20 on the outer periphery of the receptacle 14. To facilitate insertion, the receptacle 1
4 is provided with a positioning projection 40 on the inner wall, and the corresponding plug 3
1. A guide groove 41 is provided in the longitudinal direction of the outer peripheral surface. The assembled external view is shown in FIG. The connection between the pin 17 and the connection pipe 32 is sufficiently contacted without causing a connection failure. From the results of the experiment, the contact resistance is not large and there is no practical problem.

Next, in order to mount the temperature measurement probe in the measurement hole 52 of the furnace wall 51, the protection tube 11 may be simply inserted into the measurement hole 52. Since the stopper 54 is provided, the protection tube 11 is supported at an appropriate position, and the entire temperature measurement probe does not enter the furnace wall 51.
As described above, the protection tube 11 may be corroded,
When replacing with a new temperature measurement probe due to breakage of 1, deterioration of the temperature detecting element, or deterioration of insulation of the insulating material, first, remove the stopper 54 from the protective tube 11,
The nut 37 is loosened, the plug 31 is pulled out of the receptacle 14, the probe 1 and the connector 2 are separated, and only the probe 1 is pushed into the furnace through the measurement hole 52 and discarded.

[0015]

According to the present invention, as described above, a temperature detecting element is housed in a protective tube and inserted into a furnace through a measurement hole in a furnace wall.
In a temperature measurement probe comprising a probe for positioning a base end of a protection tube outside a furnace and a connector for connecting a temperature detection element extending from the protection tube, the outside diameter of the protection tube and the connector is extended over the entire length of the measurement hole. Since the temperature measurement probe is formed smaller than the hole diameter, the temperature measurement probe can be easily discarded, and the temperature measurement probe can be easily replaced.

Further, the present invention is a temperature measuring probe in which the probe and the connector are attached and detached by the insertion method of the pin and the connection pipe, so that the connection between the probe and the connector is simplified, and the probe in the furnace is discarded. Can be easily done. Further, the present invention is a temperature measurement probe having a detachable stopper provided on the outer periphery of the protection tube,
There is no need to tighten with screws as in the conventional case, and mounting / removal of the probe to / from the furnace wall can be extremely easily performed.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a specific embodiment of a temperature measuring probe of the present invention.

FIG. 2 is a plan view of a stopper portion of the temperature measurement probe of the present invention.

FIG. 3 is a front view of an assembled state of the temperature measurement probe of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Probe 2 ... Connector 11 ... Protection tube 12 ... Thermocouple element wire 13 ... Thermal contact 14 ... Receptacle 15 ... Insulation material 17 ... Pin 19 ... Powdery insulation material 20 ... Screw thread 31 ... Plug 32 ... Connection tube 33 ... Outside Orientation runge 34 34 Metal tube 35 Conductor 36 Mold 51 Furnace wall 52 Measurement hole 53 Ring groove 54 Stopper

────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] December 24, 1998

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claims

[Correction method] Change

[Correction contents]

[Claims]

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0008

[Correction method] Change

[Correction contents]

Further, the present invention provides a temperature measurement method in which a probe and a connector are attached and detached by a method of inserting a pin and a connection pipe in order to simplify the connection between the probe and the connector and to facilitate disposal of the probe into the furnace. A probe was used.
Further, the present invention provides a temperature measurement probe having a detachable E-ring provided on the outer periphery of a protective tube in order to facilitate mounting of the probe on the furnace wall.

[Procedure amendment 3]

[Document name to be amended] Statement

[Correction target item name] 0012

[Correction method] Change

[Correction contents]

When the temperature measuring probe is inserted into the measuring hole 52 of the furnace wall 51, an annular groove 53 is formed on the base end side of the protective tube 11 so that the probe is not completely inserted.
A ring 54 is provided. FIG. 2 shows a state in which the E-ring 54 is mounted.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0014

[Correction method] Change

[Correction contents]

Next, in order to mount the temperature measurement probe in the measurement hole 52 of the furnace wall 51, the protection tube 11 may be simply inserted into the measurement hole 52. Since the E-ring 54 exists, the protection tube 11 is supported at an appropriate position, and the entire temperature measurement probe does not enter the furnace wall 51. As described above, the protection tube 11 may be corroded,
When replacing with a new temperature measuring probe due to breakage of the temperature detecting element or deterioration of the insulation of the insulating material, first remove the E-ring 54 from the protective tube 11 and loosen the nut 37. The plug 31 is pulled out from the receptacle 14, the probe 1 and the connector 2 are separated, and then only the probe 1 is pushed into the furnace from the measurement hole 52 and discarded.

[Procedure amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0016

[Correction method] Change

[Correction contents]

Further, the present invention is a temperature measuring probe in which the probe and the connector are attached and detached by the insertion method of the pin and the connection pipe, so that the connection between the probe and the connector is simplified, and the probe in the furnace is discarded. Can be easily done. Furthermore, since the present invention is a temperature measurement probe having a detachable E-ring provided on the outer periphery of the protective tube, it is not necessary to tighten the screw with a screw as in the conventional case, and the probe can be attached to and detached from the furnace wall. Extremely easy.

[Procedure amendment 6]

[Document name to be amended] Statement

[Correction target item name] Brief description of drawings

[Correction method] Change

[Correction contents]

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a specific embodiment of a temperature measuring probe of the present invention.

FIG. 2 is a plan view of a stopper portion of the temperature measurement probe of the present invention.

FIG. 3 is a front view of an assembled state of the temperature measurement probe of the present invention.

[Description of Signs] 1 ... Probe 2 ... Connector 11 ... Protection tube 12 ... Thermocouple wire 13 ... Heat contact 14 ... Receptacle 15 ... Insulation material 17 ... Pin 19 ... Powder insulation material 20 ... Thread 31 ... Plug 32 ... Connecting pipe 33 ... outward flange 34 ... metal pipe 35 ... lead wire 36 ... mold 51 ... furnace wall 52 ... measuring hole 53 ... annular groove 54 ... E-ring

Claims (3)

[Claims] A probe for receiving a temperature detecting element in a protective tube, inserting the temperature detecting element into a furnace through a measurement hole in a furnace wall, and positioning a base end of the protective tube outside the furnace, and a temperature detecting element extending from the protective tube. A temperature measuring probe comprising a connector for connecting the protective tube and the connector, wherein the outer diameter of the protective tube and the connector is formed to be smaller than the diameter of the measuring hole over the entire length. 2. The temperature measurement probe according to claim 1, wherein the probe and the connector are attached and detached by a method of inserting a pin and a connection pipe. 3. The temperature measuring probe according to claim 1, wherein a detachable stopper is provided on the outer periphery of the protection tube.