JP7460326B2 - temperature measuring device - Google Patents

Description

The present disclosure relates to a temperature measuring device .

The furnace wall surrounding the boiler furnace may be damaged (e.g., creep damage) due to the metal temperature of the tubes. Damage caused by heat in the furnace may be caused by localized temperature increases in the furnace wall or localized and intermittent temperature increases and decreases. Therefore, by monitoring the temperature of the furnace wall, the risk of damage caused by heat in the furnace can be evaluated. Therefore, the furnace wall may be provided with a temperature measuring device to measure the temperature of the furnace wall.
An example of a temperature measuring device for measuring the temperature of a boiler furnace wall is a cordal type thermocouple, which measures the temperature of the furnace wall by drilling a hole in the furnace wall and inserting a thermocouple into it.

Japanese Patent Application Publication No. 10-48053

However, cordal type thermocouples require drilling and welding into the furnace wall, making installation complicated. This is especially true when multiple units are to be installed.

In order to solve such problems, it is necessary to provide a radiation thermometer that measures the temperature of the furnace wall without performing any special processing on the furnace wall, such as the radiation thermometer disclosed in Patent Document 1, for example. can also be considered. Patent Document 1 discloses a radiation thermometer that has a detector that receives radiant energy from an object to be measured and an aperture provided in front of the detector. In the radiation thermometer disclosed in Patent Document 1, the amount of light received by the detector is adjusted by adjusting the opening of the aperture, thereby widening the range of measured temperatures.

However, when measuring the temperature of a high-temperature object such as a furnace wall, if the distance between the object and the radiation thermometer is close, the radiation thermometer may be damaged by the heat of the object. . Further, when the temperature of the radiation thermometer itself increases, the heat of the radiation thermometer itself becomes noise, and there is a possibility that the temperature of the object to be measured cannot be accurately measured.

Patent Document 1 does not consider the influence of heat from the object to be measured. Therefore, when the radiation thermometer of Patent Document 1 is used as a thermometer to measure the temperature of the furnace wall, there is a possibility that the radiation thermometer will be damaged due to the points mentioned above, and it will be difficult to accurately measure the temperature of the object to be measured. It may not be possible.
Note that such a problem may occur not only when measuring the temperature of the furnace wall but also when measuring the temperature of a high-temperature measurement object.

The present disclosure has been made in consideration of the above circumstances, and aims to provide a temperature measuring device that can suppress damage caused by heat to the measurement target area and accurately measure the temperature of the measurement target area.

In order to solve the above problems, the temperature measuring device of the present disclosure employs the following means.
A temperature measuring device according to an aspect of the present disclosure is a temperature measuring device that measures the temperature of a measurement target site, and extends in a predetermined direction and has an opening formed at one end, and the opening is connected to the measurement target site. A cylinder part arranged so as to face each other, and the radiation received by a sensor part that is provided inside the cylinder part and at the other end of the cylinder part and receives the radiation light from the measurement target site. a temperature measuring means for measuring the temperature of the measurement target region based on the intensity of light; A constriction part is provided that limits the target area more than the opening of the cylindrical part.

In the above configuration, the temperature of the measurement target part is measured by a temperature measurement means that measures the temperature of the measurement target part based on the intensity of the light emitted from the measurement target part. In this way, a temperature measurement means is used that can measure the temperature of the measurement target part without processing the measurement target part (for example, drilling or welding). This eliminates the need to perform special processing for temperature measurement, such as welding, on the measurement target part when installing the temperature measurement device. Therefore, the time required to install the temperature measurement device can be shortened and installation costs can be reduced.

In addition, in the above configuration, the throttling portion limits the field of view as seen from the temperature measuring means. In other words, the amount of radiant light received by the temperature measuring means is reduced. This makes it possible to suppress saturation of the temperature measuring means by the throttling portion. When the temperature measuring means is saturated, it is no longer possible to measure temperatures above that level. However, in the above configuration, the throttling portion suppresses saturation of the temperature measuring means, so that the upper limit of the temperature range that the temperature measuring means can be expanded. Therefore, for example, even if the measurement target portion is hot, the temperature of the measurement target portion can be measured by an inexpensive temperature measuring means with a low upper limit of the temperature range. This makes it possible to reduce installation costs.

Further, the temperature measuring means measures the temperature of the measurement target site via a cylindrical portion extending in a predetermined direction. Thereby, a distance corresponding to the length in the longitudinal direction of the cylindrical portion can be provided between the temperature measuring means and the measurement target site. By providing a distance between the temperature measurement means and the measurement target region, it is possible to make it difficult for the heat of the measurement target region to be transmitted to the temperature measurement means. Thereby, it is possible to suppress damage to the temperature measuring means due to heat of the measurement target site. In addition, in general, in a temperature measuring means that measures the temperature of the measurement target part based on the intensity of the received radiation light, when the temperature of the temperature measurement means itself rises, the heat of the temperature measurement means itself becomes noise, and the temperature of the measurement target part increases. Temperature may not be measured accurately. With the above configuration, the influence of heat on the measurement target region can be suppressed, so that the temperature of the measurement target region can be accurately measured.

If a distance is provided between the temperature measurement means and the measurement target area, the viewing angle of the temperature measurement means will be widened, and the field of view of the temperature measurement means will be expanded to include areas other than the desired measurement target area, making it difficult to perform the desired measurement. There is a possibility that the temperature of the target area cannot be measured accurately. In the above configuration, by providing the aperture section, the field of view is limited to mainly view the measurement target region, so that it is possible to prevent the field of view from expanding to areas other than the desired measurement target region. Therefore, even with a configuration in which a distance is provided between the temperature measuring means and the measurement target site, it is possible to prevent the field of view from expanding and to suppress a reduction in measurement accuracy caused by the field of view expansion.

In addition, in the above configuration, a temperature measuring means is provided inside the tube. Since dust and the like is unlikely to flow into the inside of the tube, the temperature measuring means can be protected from dust and the like. Furthermore, since dust and the like is unlikely to get between the temperature measuring means and the part to be measured, the influence of dust and the like during temperature measurement can be suppressed, and the temperature of the part to be measured can be accurately measured.

Further, the temperature measuring device according to one aspect of the present disclosure includes a plate portion that extends radially from an outer circumferential surface of one end of the cylindrical portion and is welded and fixed to the outer circumferential surface, and one end of the plate portion It may be located closer to one end than one end of the section.

In the above configuration, one end of the plate portion is located closer to one end than one end of the tube portion. This allows the temperature measuring device to be fixed to the member on the measurement target portion by fixing one end of the plate portion to the member on the measurement target portion. In addition, since it is only necessary to fix the plate portion to the tube portion, the temperature measuring device can be fixed to the member on the measurement target portion with a simple configuration.

Further, the temperature measuring device according to one aspect of the present disclosure includes a fixing means for fixing the cylindrical portion to a pin that supports a heat insulating material covering the measurement target region on a member on the measurement target region side. It's okay.

In the above configuration, the fixing means fixes the tubular portion to the pin that supports the heat-retaining material. This allows the temperature measuring device to be installed on the member on the measurement target part side by using the pin that supports the heat-retaining material. Therefore, it is possible to support the temperature measuring device on the member on the measurement target part side with a relatively simple structure, without applying a complicated structure for installing the temperature measuring device on the member on the measurement target part side.

In addition, the temperature measuring device according to one aspect of the present disclosure may be provided with a spiral portion on the outer peripheral surface of the cylindrical portion, the spiral portion protruding from the outer peripheral surface and extending in a spiral shape along the predetermined direction.

In the above configuration, a helical portion extending in a helical shape is provided on the outer peripheral surface of the cylindrical portion. As a result, for example, when the measurement target portion is covered with a relatively soft member such as a heat-insulating material, the cylindrical portion can be twisted into the heat-insulating material by pressing the cylindrical portion against the heat-insulating material while rotating it about the central axis, and the helical portion can be engaged with the heat-insulating material. By engaging the helical portion with the heat-insulating material, the temperature measuring device can be installed on the member on the measurement target portion side. Therefore, the temperature measuring device can be easily installed on the member on the measurement target portion side and the temperature of the measurement target portion can be measured without the need for complicated work such as removing the heat-insulating material or welding work.

Further, in the temperature measuring device according to one aspect of the present disclosure, a magnet provided at one end of the cylindrical portion, and a magnet connected to the cylindrical portion, and a heat insulating material covering the measurement target region are attached to the cylindrical portion. and an auxiliary part for supporting the part.

In the above configuration, a magnet is provided at one end of the cylindrical portion. Thereby, for example, when the member on the side of the measurement target site is made of a material that can be attracted by a magnet, the temperature measuring device can be supported by the member on the side of the measurement target site by the magnet. Therefore, the temperature measuring device can be easily installed on the member on the measurement target site side without performing complicated work such as welding.
Moreover, since the cylinder part is supported by the member on the measurement target site side by the magnet provided at one end, the cylinder part is supported in a so-called cantilever shape. When the cylindrical part is supported in a cantilevered manner, a downward rotational moment is generated in the cylindrical part around the point of contact between the magnet and the member on the measurement target side, so that the attraction of the magnet is released. easy. In the above configuration, the cylindrical portion is supported by the heat insulating material by the auxiliary portion. Thereby, the cylindrical portion can be supported not only by the magnet but also by the heat insulating material. Therefore, in a configuration using a magnet, the temperature measuring device can be firmly supported by the member on the measurement target site side. In addition, since the heat insulating material that covers the area to be measured is used to assist the magnet, there is no need to apply a complicated structure to assist the magnet, and a relatively simple structure is used to assist the magnet and increase the temperature. The measuring device can be firmly supported by the member on the measurement target site side.

Further, the temperature measuring device according to one aspect of the present disclosure includes an adhesive that adheres the magnet and the member on the side of the measurement target site, and the adhesive good.

Generally, when the temperature of the object to be bonded becomes high, the adhesive force caused by the magnet decreases. In the above configuration, the magnet and the member on the measurement target site side are bonded using an adhesive that exhibits adhesive force at a temperature higher than a predetermined temperature. As a result, even if the temperature of the member on the measurement target site side increases and the adhesive force of the magnet decreases, the magnet and the measurement target site side member can be bonded together by the adhesive force of the adhesive. In other words, when the temperature of the member on the side of the measurement target area is relatively low, such as room temperature, the magnet and the member on the side of the measurement target area are bonded by the magnet, and the temperature of the member on the side of the measurement target area reaches a predetermined temperature. When the height is higher than that, the magnet and the member on the measurement target site side are bonded with adhesive. Therefore, in the configuration using a magnet, even if the temperature of the member on the measurement target site side becomes high, the temperature measuring device can be installed on the member on the measurement target site side.

Further, in the temperature measuring device according to one aspect of the present disclosure, the auxiliary part is in contact with a member on the measurement target site side, and the cylindrical part and the auxiliary part include a magnetic circuit including the magnet. may be formed.

In the above configuration, the auxiliary part contacts the member on the measurement target site side, and a magnetic circuit is formed in the cylindrical part and the auxiliary part. Thereby, a magnetic circuit is formed by the magnet, the cylindrical part, the auxiliary part, and the member on the measurement target site side. By forming a magnetic circuit, the magnetic flux density passing through the adhesive surface increases, so that the attraction force of the magnet can be improved. Therefore, the temperature measuring device can be supported more firmly with respect to the member on the measurement target site side.

Further, the temperature measuring device according to an embodiment of the present disclosure includes a fixing part that fixes the cylindrical part to the member to be fixed, and the fixing part engages with a recess formed in the member to be fixed. It may also include an engaging portion 83.

In the above configuration, the fixing part that fixes the cylindrical part to the member to be fixed has an engaging part that engages with a recess formed in the member to be fixed. Thereby, by engaging the engaging portion and the recessed portion, the cylindrical portion can be fixed to the member to be fixed. Therefore, the cylindrical portion can be fixed to the member to be fixed more easily than when fixing by welding or the like.
In particular, depending on the part to be fixed, it may be necessary to perform an inspection to check for damage after welding, but in the above configuration, the cylindrical part is fixed by engaging the engaging part and the recessed part. Therefore, there is no need for inspection after fixation. Therefore, fixed work can be made simple and short-term.

In addition, in a temperature measuring device according to an embodiment of the present disclosure, the fixed target member is a measurement target member that is a member having the measurement target portion, and the fixed portion may have a second temperature measuring means that contacts the inner surface of the recess and measures the temperature of the contacting member.

In the above configuration, the fixing part has a second temperature measuring means that comes into contact with the inner surface of the recess and measures the temperature of the contacting member. This makes it possible to measure the temperature of the inner surface of the recess formed in the fixing target member by the second temperature measuring means. Since the fixing target member and the member having the measurement target portion are integrally provided, the temperature of the measurement target portion can be measured by measuring the temperature of the fixing target member. In this way, the temperature of the measurement target member can be measured by both the first temperature measuring means and the second temperature measuring means, thereby improving the reliability of the temperature measurement.
The second temperature measuring means is in contact with the inner surface of the recess and measures the temperature. That is, it measures the temperature inside the fixed target member. This makes it less susceptible to influences from the outside of the fixed target member compared to when the temperature of the surface of the fixed target member is measured. Therefore, it is possible to measure the temperature more accurately compared to when the temperature of the surface of the fixed target member is measured.

A temperature measuring device according to one embodiment of the present disclosure is a temperature measuring device that measures the temperature of a measurement target member, and includes a temperature measuring means that measures the temperature of a contacting member, and an engagement portion that supports the temperature measuring means and engages with a recess formed in the measurement target member, and the temperature measuring means comes into contact with the inner surface of the recess.

In the above configuration, the engagement portion supporting the temperature measuring means engages with a recess formed in the measurement target member. This allows the temperature measuring means to be fixed to the measurement target member by engaging the engagement portion with the recess. This makes it easier to fix the temperature measuring means to the measurement target member than by welding or the like.
In particular, when the measurement target member is a member that is subjected to high pressure, such as a boiler furnace wall, it is necessary to inspect the member for damage after welding, but in the above configuration, the temperature measuring means is fixed by engaging the engaging portion with the recess, so there is no need for inspection after fixing. Therefore, the fixing work can be simplified and completed in a short time.
Moreover, the temperature measuring means is in contact with the inner surface of the recess and measures the temperature. That is, the temperature inside the measurement target member is measured. This makes it possible to reduce the influence from the outside of the measurement target member compared to when the temperature of the surface of the measurement target member is measured. Therefore, it is possible to measure the temperature more accurately compared to when the temperature of the surface of the measurement target member is measured.

Further, in the temperature measuring device according to an embodiment of the present disclosure, the engaging portion may include a threaded portion that screws into the inner circumferential surface of the recess and a contact portion that comes into contact with the measurement target member. good.

In the above configuration, the engagement portion has an abutment portion that abuts against the member to be fixed. As a result, even if a load acts on the engagement portion in a direction intersecting the central axis of the recess, the abutment portion abuts against the member to be measured, so the engagement portion can be supported by the abutment portion. This makes it difficult for the engagement portion to tilt with respect to the central axis of the recess. This makes it difficult for the engagement portion to be disengaged from the recess.

Further, in the temperature measuring device according to an embodiment of the present disclosure, the engaging portion may include a biasing portion that biases the temperature measuring means toward the recessed portion 84.

In the above configuration, the engaging portion includes a biasing portion that biases the temperature measuring means toward the recess. As a result, the biasing portion biases the temperature measuring means toward the recess, so that even if the engaging portion is thermally expanded, the temperature measuring means can be brought into contact with the inner surface of the recess, and the temperature can be maintained. It can be measured.

A method for installing a temperature measuring device according to an aspect of the present disclosure includes a sensor section that detects the temperature of a measurement target site covered with a heat insulating material, a main body section connected to the sensor section, and a main body section that extends in a predetermined direction. A method for installing a temperature measuring device that has a cylindrical portion having openings at both ends in the longitudinal direction and measures the temperature of the measurement target site, the heat insulating material removing the heat insulating material covering the measurement target site. a removing step, a step of installing the cylindrical portion in the space from which the heat insulating material has been removed so that an opening formed at one end faces the measurement target region, and utilizing the space inside the cylindrical portion. a sensor installation step of providing the sensor section on the cylindrical section so as to detect the temperature of the measurement target region; and a main body part installation step of providing the main body part.

In the above configuration, the main body portion is provided outside the outer surface of the heat insulating material. This allows access to the main body without using the heat insulating material. As a result, when the main body breaks down, for example, the main body can be easily repaired without having to perform any work such as removing the heat insulating material. Furthermore, since the main body can be easily accessed when maintaining the main body, the maintainability of the main body can be improved.

Further, the method for installing a temperature measurement device according to one aspect of the present disclosure includes measuring the temperature of a plurality of different parts of the temperature measurement target including the measurement target part, and based on the measured temperature of the temperature measurement target. , the temperature measurement device may be installed to monitor the temperature of the measurement target site after determining the measurement target site.

In the above configuration, a temperature measuring device is installed that determines the measurement target part based on the temperatures of multiple different parts of the temperature measurement target and monitors the temperature of the determined measurement target part. This makes it possible to determine the temperature measurement target part whose temperature is to be monitored based on the temperature of the temperature measurement target. Therefore, for example, if a part that may be damaged by overheating is determined to be the temperature measurement target part based on temperature, overheating damage can be detected early by monitoring the temperature measurement target part with the temperature measuring device, and overheating damage to the temperature measurement target can be prevented.

According to the present disclosure, it is possible to suppress damage caused to the measurement target site due to heat, and to accurately measure the temperature of the measurement target site.

FIG. 1 is a perspective view showing a temperature measuring device according to a first embodiment of the present disclosure. FIG. 2 is a longitudinal cross-sectional view showing the temperature measuring device of FIG. 1. FIG. FIG. 2 is a diagram showing a method of assembling the temperature measuring device of FIG. 1; 2A to 2C are diagrams illustrating a method for assembling the temperature measuring device of FIG. 1. 2A to 2C are diagrams illustrating a method for assembling the temperature measuring device of FIG. 1. FIG. 2 is a diagram showing a method of assembling the temperature measuring device of FIG. 1; 2A to 2C are diagrams illustrating a method for assembling the temperature measuring device of FIG. 1. 2A to 2C are diagrams illustrating a method for assembling the temperature measuring device of FIG. 1. 2A to 2C are diagrams illustrating a method for assembling the temperature measuring device of FIG. 1. FIG. 1 is a schematic diagram of a measurement target region determination device according to a first embodiment of the present disclosure. 4 is a graph showing the relationship between the aperture diameter of the aperture in the temperature measuring device of FIG. 1 and the measurement range and S/N ratio. FIG. 2 is a schematic side view showing a temperature measuring device according to a second embodiment of the present disclosure. FIG. 13 is a schematic side view showing a temperature measuring device according to a third embodiment of the present disclosure. FIG. 13 is a schematic side view showing a temperature measuring device according to a fourth embodiment of the present disclosure. FIG. 13 is a schematic side view showing a temperature measuring device according to a fifth embodiment of the present disclosure. FIG. 7 is a longitudinal cross-sectional view showing a temperature measuring device according to a sixth embodiment of the present disclosure. FIG. 16A is an enlarged vertical cross-sectional view of portion B in FIG. 16A. This is a cross-sectional view taken along the line CC in FIG. 16A. FIG. 13 is a longitudinal cross-sectional view showing a temperature measuring device according to a seventh embodiment of the present disclosure. FIG. 18 is an enlarged vertical cross-sectional view showing the main part of FIG. 17; 19 is a diagram showing a modification of FIG. 18. FIG. 19 is a diagram showing a modification of FIG. 18. FIG. 19 is a diagram showing a modification of FIG. 18. FIG.

An embodiment of a temperature measuring device according to the present disclosure will be described below with reference to the drawings.

[First embodiment]
Hereinafter, a first embodiment of a temperature measuring device according to some embodiments of the present disclosure will be described with reference to FIGS. 1 to 11 .
As shown in Fig. 1, the temperature measuring device 1 according to this embodiment is installed in a furnace wall 3 of a boiler 2, and measures the temperature of a portion of the furnace wall 3 whose temperature is to be measured (hereinafter referred to as a "measurement target portion"). The furnace wall 3 has a plurality of tubular heat transfer tubes 4 through which water flows, and a fin portion 5 connecting adjacent heat transfer tubes 4, and surrounds a furnace 6 provided in the boiler 2. The furnace wall 3 is covered with a heat insulating material 7 over substantially the entire surface on the outer side of the furnace. The outer surface of the heat insulating material 7 is covered with a casing 8. The temperature measuring device 1 also transmits and receives information to and from a control device 9. The casing 8 is formed into a corrugated cross section in which recesses and protrusions are continuous.

As shown in FIG. 2, the temperature measuring device 1 includes a cylindrical portion 11 disposed such that one end face faces the furnace wall 3, a fixing portion 12 connecting the cylindrical portion 11 and the furnace wall 3, and a cylindrical portion. A temperature measuring section (first temperature measuring means) 13 fixed to the other end surface of the tube section 11, an aperture (throttling section) 14 provided inside the cylinder section 11 between the temperature measuring section 13 and the furnace wall 3; , and an upper plate portion fixed to the cylindrical portion 11 and extending along the outer surface of the heat insulating material 7.

The cylinder portion 11 is a cylindrical member with openings formed at both ends. The cylindrical portion 11 is arranged so that its central axis is substantially perpendicular to the furnace wall 3. Further, the cylindrical portion 11 is arranged such that the opening formed at one end faces the measurement target portion of the furnace wall 3 (in this embodiment, the fin portion 5), and the one end is slightly spaced apart from the furnace wall 3. It is arranged so that Further, the cylindrical portion 11 penetrates the heat insulating material 7. That is, the other end of the cylindrical portion 11 is located on the outer side of the furnace than the outer surface of the heat insulating material 7. In this embodiment, the length in the longitudinal direction of the cylindrical portion 11 is set to 200 mm, and the inner diameter of the cylindrical portion 11 is set to 15 mm.

As shown in FIGS. 1 and 2, the fixed part 12 includes four L-shaped parts 17 each having a substantially L-shaped cross section, one end of which is welded and fixed to the furnace wall 3, and a cylindrical part 11 that passes through the center. It has a rectangular plate-shaped lower plate part 18 fixed to the lower plate part 18, and four substantially cylindrical heat-insulating spacers 19 connecting each L-shaped part 17 and the lower plate part 18.

The four L-shaped portions 17 are arranged at positions corresponding to the corners of the lower plate portion 18. Each L-shaped part 17 includes a first L-shaped part 17a whose one end is welded and fixed to the fin part 5 of the furnace wall 3 and extends substantially perpendicularly to the fin part 5, and a first L-shaped part 17a that extends from the other end of the first L-shaped part 17a to the furnace wall. 3 and a second L-shaped portion 17b extending in parallel. Each first L-shaped portion 17a is fixed to a fin portion 5 with one heat transfer tube 4 sandwiched between the fin portions 5 that the cylinder portion 11 faces. Each second L-shaped portion 17b extends in the direction of the cylindrical portion 11 from the other end of the first L-shaped portion 17a.

The lower plate portion 18 has a circular opening 18a formed in approximately the center. The diameter of the opening 18a is larger than the outer diameter of the tubular portion 11, and the tubular portion 11 is inserted into the opening 18a. The lower plate portion 18 is fixed via a first joint 20 to the outer peripheral surface of one end of the tubular portion 11 that passes through the opening 18a.

Each insulating spacer 19 is fixed to the surface of the second L-shaped portion 17b opposite the surface facing the furnace wall 3, and is also fixed to the surface of the lower plate portion 18 facing the furnace wall 3. That is, each insulating spacer 19 is provided so as to be sandwiched between the second L-shaped portion 17b and the lower plate portion 18. The insulating spacer 19 is formed from a material having insulating properties, and insulates the heat of the L-shaped portion 17 heated by the furnace wall 3 from being transmitted to the lower plate portion 18.

The second L-shaped portion 17b, the insulating spacer 19, and the lower plate portion 18 are fixed by a bolt 21 that penetrates the three members. The bolt 21 is inserted from the lower plate portion 18 side and is fastened to a nut 22 that contacts the surface of the second L-shaped portion 17b facing the furnace wall 3. The bolt hole 23 formed in the second L-shaped portion 17b is formed in an elliptical shape that extends in the extension direction of the second L-shaped portion 17b (see FIG. 3).

The temperature measurement unit 13 has a sensor unit 25 that receives the radiated light from the area to be measured, and a main body unit 26 connected to the sensor unit 25, and measures the temperature of the area to be measured based on the intensity of the radiated light received by the sensor unit 25.

The main body portion 26 has a housing 27 that forms an outer shell and is fixed to the other end surface of the cylindrical portion 11 . Inside the housing 27, there are a socket 28 that supports the sensor section 25, a board 29 to which the socket 28 is connected, a wireless transmitter 30 that wirelessly transmits information from the sensor section 25 to the control device 9, and a sensor. A battery 31 is provided to supply electricity to the unit 25, the wireless transmitter 30, and the like. The main body portion 26 is provided outside the outer surface of the heat insulating material 7 (that is, on the opposite side from the furnace wall 3).

The casing 27 is formed in a substantially rectangular parallelepiped shape, and its surface on the furnace wall 3 side is in surface contact with the other end surface of the cylindrical portion 11 . A circular opening 27a is formed approximately at the center of the surface that contacts the other end surface of the cylindrical portion 11.

The socket 28 is fixed to the surface of the substrate 29 facing the furnace wall 3 at a position corresponding to the opening 27a formed in the housing 27. The socket 28 supports the sensor unit 25 so that the sensor unit 25 passes through the opening 27a and protrudes further toward the furnace wall 3 than the surface of the housing 27 facing the furnace wall 3.

The substrate 29 is connected to the battery 31 via the first cable 32. The battery 31 is fixed to the surface of the substrate 29 opposite the furnace wall 3 side. In addition to the first cable 32, a second cable 33 connected to the wireless transmitter 30 extends from the battery 31. The wireless transmitter 30 is arranged on the opposite side of the furnace wall 3 side in the housing 27, and wirelessly transmits data acquired by the sensor unit 25 to the control device 9 arranged outside the housing 27. The control device 9 calculates the temperature of the measurement target part based on the received data. Note that the temperature measurement unit 13 and the control device 9 may transmit and receive data via a cable. The control device 9, which calculates the temperature of the measurement target part based on the data from the sensor unit 25, may be arranged inside the housing 27. However, in the case of a structure that transmits and receives data wirelessly, since there is no wiring, the structure can be simplified and installation costs can be reduced.

The sensor unit 25 is supported by a socket 28 of the main body 26. The sensor unit 25 also has a sensor body (not shown) inside that detects the temperature of the measurement target area. Half of the sensor unit 25 on the furnace wall 3 side is located inside the tube portion 11, and the other half is located inside the housing 27 of the main body 26.

The aperture 14 is disposed inside the sensor section 25, between the sensor body and the furnace wall 3. The aperture 14 is an annular plate material that protrudes radially inward from almost the entire circumferential area of the inner peripheral surface of the sensor section 25, and limits the field of view seen from the sensor body to a smaller extent than the opening formed at one end of the tubular section 11 so as to mainly see the measurement target portion. A method for setting the opening diameter of the annular aperture 14 will be described later.
The aperture 14 may be any member that narrows a portion of the space within the sensor portion 25 in the axial direction, and may have a structure similar to the diaphragm of a camera, or may have a structure similar to an orifice.

The upper plate portion 15 has a circular opening 15a formed approximately in the center. The diameter of the opening 15a is larger than the outer diameter of the cylindrical portion 11, and the cylindrical portion 11 is inserted through the opening 15a. The lower plate part 18 is fixed to the outer circumferential surface of the other end of the cylindrical part 11, which is inserted through the opening 15a, via a second joint. Further, substantially the entire surface of the upper plate portion 15 on the furnace wall 3 side is in surface contact with the outer surface of the heat insulating material 7 . Moreover, the upper plate part 15 is arranged so as to be spaced apart from the casing 8 and is not fixed to the casing 8.
In this way, in this embodiment, the casing 8 and the temperature measuring device 1 are not fixed, but can be moved relative to each other.

The control device 9 includes, for example, a CPU (Central Processing Unit), a RAM (Random Access Memory), a ROM (Read Only Memory), a computer-readable storage medium, and the like. A series of processes for realizing various functions is stored in a storage medium, etc. in the form of a program, for example, and the CPU reads this program into a RAM, etc., and executes information processing and arithmetic processing. By doing so, various functions are realized. Note that the program may be pre-installed in a ROM or other storage medium, provided as being stored in a computer-readable storage medium, or distributed via wired or wireless communication means. etc. may also be applied. Computer-readable storage media include magnetic disks, magneto-optical disks, CD-ROMs, DVD-ROMs, semiconductor memories, and the like.

Next, a method for installing the temperature measuring device 1 will be explained using FIGS. 3 to 9. Note that FIGS. 3 to 9 each show the temperature measuring device 1 viewed from a direction perpendicular to the furnace wall 3.
First, the casing 8 and heat insulating material 7 near the measurement target part whose temperature is to be measured with the temperature measuring device 1 are removed to expose the measurement target part.

3, the first L-shaped portion 17a of the four L-shaped portions 17 is welded and fixed to the fin portion 5 of the furnace wall 3. The plate-shaped first L-shaped portion 17a is fixed so as to be aligned along the extension direction of the fin portion 5.
Next, as shown in FIG. 4, the insulating spacer 19 is placed on the second L-shaped portion 17b of the four L-shaped portions 17, and the lower plate portion 18 is brought into contact with the insulating spacer 19. At this time, each member is arranged so that the bolt holes formed in the L-shaped portion 17, the insulating spacer 19, and the lower plate portion 18 are communicated. At this time, it is necessary to fix the lower plate portion 18 to the L-shaped portion 17 so that the opening 18a formed in the lower plate portion 18 is located at a position corresponding to the measurement target portion. In this embodiment, since the bolt hole 23 formed in the second L-shaped portion 17b has an elliptical shape, the position of the opening 18a formed in the lower plate portion 18 can be adjusted in the extension direction of the ellipse. After the insulating spacer 19 and the lower plate portion 18 are arranged at a predetermined position, the bolt 21 inserted through the bolt hole is fastened to the nut 22 to fix the lower plate portion 18 to the L-shaped portion.

5, the tubular portion 11 is inserted into an opening formed in the lower plate portion 18, and the tubular portion 11 and the lower plate portion 18 are fixed together with a first joint 20. At this time, the opening 18a formed in the lower plate portion 18 is located at a position corresponding to the portion to be measured, so that the opening formed at one end of the tubular portion 11 faces the portion to be measured.
Next, as shown in FIG. 6 , the cylindrical portion 11 is inserted into the opening 15 a formed in the upper plate portion 15 , and the other end of the cylindrical portion 11 and the upper plate portion 15 are fixed together by the second joint 34 .

Next, as shown in FIG. 7, the heat insulating material 7 that was initially removed is replaced, and the measurement target portion and part of the temperature measuring device 1 are covered with the heat insulating material 7.
8, the casing 8 removed together with the heat insulating material 7 is restored, and the heat insulating material 7 is covered with the casing 8. Note that a rectangular opening 8a is formed in the restored casing 8 so that the cylindrical portion 11 and the casing 8 do not interfere with each other.
Next, as shown in FIG. 9 , the temperature measuring unit 13, having the wireless transmitter 30, battery 31, circuit board 29, socket 28 and sensor unit 25 arranged in predetermined positions, is fixed to the tubular portion 11 so that the sensor unit 25 is positioned inside the tubular portion 11.
In this manner, the temperature measuring device 1 is installed on the furnace wall 3 .

Next, a method for determining a measurement target region from the entire furnace wall 3 will be described using FIG. 10.
When determining the measurement target region, the measurement target region determining device 36 is used. As shown in FIG. 10, the measurement target region determining device 36 includes an optical fiber thermometer 37 that measures the temperature of the outer surface of the furnace wall 3, and a part of the furnace wall 3 that is overheated based on the measured value of the optical fiber thermometer 37. A prediction unit 38 that predicts a region with a high risk of damage is provided. The optical fiber thermometer 37 is arranged along the fin portion 5 of the furnace wall 3.

When determining the measurement target part, first, the temperature of a plurality of different parts of the furnace wall 3 (temperature measurement target including the measurement target part) is measured using the optical fiber thermometer 37. Next, the measured data (temperature) is transmitted to the prediction unit 38. The prediction unit 38 performs statistical processing on the basis of the received data to predict areas with a high risk of overheating damage. Then, the part with a high risk of overheating damage is determined to be the part to be measured. Once the measurement target site is determined, the temperature measuring device 1 is installed on the furnace wall 3 using the method described above so as to measure the temperature of the measurement target site. A temperature measuring device 1 installed on the furnace wall 3 monitors the temperature of the measurement target site.

The method for predicting a region with a high risk of overheating damage by the prediction unit 38 is not particularly limited as long as it is based on the temperature measured by the optical fiber thermometer 37. For example, by determining the difference between temperature values measured at different times at multiple locations using the optical fiber thermometer 37, and selecting locations where the difference is higher than a threshold value set by statistical processing as an area with a high risk of overheating damage. You can predict that.

Next, a method for setting the opening diameter of the aperture 14 will be described with reference to FIG. 11. FIG. 11 is a graph showing the results of measuring the upper limit of the measurement range and the S/N ratio while changing the opening diameter of the aperture 14 provided in the sensor unit 25 (tubular portion 11 having a length of 200 mm and an inner diameter of 15 mm) in this embodiment. In FIG. 11, the measurement result of the upper limit of the measurement range is shown by a dashed line, and the measurement result of the S/N ratio is shown by a solid line. The upper limit of the measurement range means the upper limit of the temperature that can be measured by the temperature measuring device 1. The S/N ratio means the ratio of the signal from the furnace wall 3 input when the temperature measuring device 1 measures the temperature to the noise generated by the sensor unit 25, the aperture 14, the heat of the cylindrical portion 11, and the reflection of infrared rays on the inner surface of the cylindrical portion 11. The larger the S/N ratio, the smaller the effect of noise and the more accurate the temperature measurement becomes.

As is clear from FIG. 11, the SN ratio increases as the opening diameter of the aperture 14 increases. That is, the larger the opening diameter of the aperture 14, the more accurately the temperature can be measured. This is because noise is reduced by increasing the opening diameter of the aperture 14. On the other hand, when the opening diameter of the aperture 14 is increased, the upper limit of the measurement range becomes smaller. That is, the upper limit of measurable temperature becomes lower. This is because by increasing the opening diameter of the aperture 14, the amount of light received by the sensor section 25 increases, making the sensor section 25 more likely to be saturated.

In this way, increasing the opening diameter of the aperture 14 improves the accuracy of temperature measurement, but lowers the upper limit of measurable temperature. In FIG. 11, the allowable lower limit value for both numerical values is shown by a dashed-dotted line. Furthermore, in both numerical values, areas where the value is larger than the allowable lower limit value are shaded. It can be seen from FIG. 11 that the opening diameter of the aperture 14 in the shaded area is approximately 1.5 mm.
Thus, in this embodiment, the opening diameter of the aperture 14 is set to 1.5 mm based on the upper limit of the measurement range and the SN ratio. Note that the numerical value of the opening diameter is just an example, and the present disclosure is not limited thereto. It may be set based on the upper limit of the measurement range and the SN ratio, taking into account the shape of the cylindrical portion 11, the temperature of the object to be measured, and the like.

According to this embodiment, the following advantageous effects are obtained.
In this embodiment, the temperature of the measurement target part is measured by the temperature measuring unit 13, which measures the temperature of the measurement target part based on the intensity of the light radiated from the measurement target part. In this way, a temperature measuring means is used that can measure the temperature of the measurement target part without processing the measurement target part (for example, drilling or welding). As a result, when installing the temperature measuring device 1, there is no need to perform special processing for temperature measurement, such as welding, on the measurement target part. Therefore, the time required to install the temperature measuring device 1 can be shortened, and installation costs can be reduced.

In addition, in this embodiment, the aperture 14 limits the field of view seen by the temperature measurement unit 13. In other words, the amount of radiant light received by the temperature measurement unit 13 is reduced. This makes it possible to suppress saturation of the sensor unit 25 of the temperature measurement unit 13 by the aperture 14. When the temperature measurement means is saturated, it is not possible to measure any higher temperatures. However, in this embodiment, the aperture 14 suppresses saturation of the temperature measurement means, so that the upper limit of the temperature range that the temperature measurement unit 13 can measure can be expanded. Therefore, even in the case of a high-temperature measurement target part such as the furnace wall 3, the temperature of the measurement target part can be measured by an inexpensive temperature measurement means with a low upper limit of the temperature range. This makes it possible to reduce installation costs.

Furthermore, the temperature measuring unit 13 measures the temperature of the measurement target portion via the tube portion 11 extending in a predetermined direction. This allows a distance (200 mm in this embodiment) equivalent to the longitudinal length of the tube portion 11 to be provided between the temperature measuring unit 13 and the measurement target portion. By providing a distance between the temperature measuring unit 13 and the measurement target portion, it is possible to make it difficult for heat from the measurement target portion to be transmitted to the temperature measuring unit 13. This makes it possible to suppress damage to the temperature measuring unit 13 caused by heat from the measurement target portion. In particular, since the substrate 29 and the like are vulnerable to high temperatures, damage to the main body portion 26 having the substrate 29 and the like can be suppressed.
Generally, in the temperature measuring unit 13 that measures the temperature of the measurement target part based on the intensity of the received radiated light, if the temperature of the temperature measuring unit 13 itself rises, the heat of the temperature measuring unit 13 itself becomes noise, and there is a possibility that the temperature of the measurement target part cannot be measured accurately. With the above configuration, the influence of the heat of the measurement target part can be suppressed, so that the temperature of the measurement target part can be measured accurately.

If a distance is provided between the temperature measurement section 13 and the measurement target site, the viewing angle of the temperature measurement section 13 will be widened, and the field of view of the temperature measurement means will be expanded to include areas other than the desired measurement target site. There is a possibility that the temperature of the measurement target part cannot be accurately measured. In particular, the viewing angle extends to the inner circumferential surface of the cylindrical portion 11, and there is a possibility that the temperature of the measurement target site cannot be accurately measured. In this embodiment, by providing the aperture 14, the field of view is limited to mainly view the measurement target region, so that it is possible to prevent the field of view from expanding beyond the desired measurement target region. Therefore, even with a configuration in which a distance is provided between the temperature measurement unit 13 and the measurement target site, it is possible to prevent the field of view from expanding and to suppress a reduction in measurement accuracy due to the field of view expansion.

In addition, in this embodiment, a temperature measuring unit 13 is provided inside the tube portion 11. Since dust and the like is unlikely to flow into the inside of the tube portion 11, the temperature measuring unit 13 can be protected from dust and the like. Furthermore, since dust and the like is unlikely to get between the temperature measuring unit 13 and the measurement target portion, the influence of dust and the like during temperature measurement can be suppressed, and the temperature of the measurement target portion can be accurately measured.

Moreover, in this embodiment, the temperature measuring device 1 and the casing 8 are not fixed, but are relatively movable. Thereby, thermal elongation of the temperature measuring device 1 due to the influence of heat of the furnace wall 3 can be tolerated. Therefore, damage to the temperature measuring device 1 due to thermal expansion of the temperature measuring device 1 can be prevented.

In this embodiment, the main body part 26 of the temperature measuring part 13 is provided outside the outer surface of the heat insulating material 7. Thereby, the main body portion 26 can be accessed without going through the heat insulating material 7. As a result, for example, when various devices provided on the main body 26 break down, the various devices provided on the main body 26 can be easily repaired without having to perform work such as removing the heat insulating material 7. It can be performed. Further, since the various devices provided in the main body section 26 can be easily accessed when performing maintenance, the maintainability of the various devices provided in the main body section 26 can be improved.

In this embodiment, the temperature measuring device 1 is installed so that the measurement target area is determined based on the temperatures of multiple different areas of the furnace wall 3, and the temperature of the determined measurement target area is monitored. This makes it possible to determine the temperature measurement target area whose temperature is to be monitored based on the temperature of the furnace wall 3. In this way, areas that may be subject to overheating damage are determined as temperature measurement target areas based on the temperature of the furnace wall 3, so by monitoring the temperature measurement target areas with the temperature measuring device 1, overheating damage can be detected early. Therefore, overheating damage to the furnace wall 3 can be prevented.

[Second embodiment]
Next, a second embodiment of the present disclosure will be described using FIG. 12.
This embodiment differs from the first embodiment mainly in the structure of the fixing part that fixes the cylindrical part 11 to the furnace wall 3. Therefore, the same components as in the first embodiment are given the same reference numerals, and detailed description thereof will be omitted.
The fixing part 42 of the temperature measuring device 41 according to the present embodiment has two plate-shaped taps (plate parts) 43 that extend radially from the outer peripheral surface of one end of the cylindrical part 11 and are fixed by welding to the outer peripheral surface. . The end of each tap 43 on the furnace wall 3 side protrudes from the end of the cylindrical portion 11 on the furnace wall 3 side. The two taps 43 are provided on the outer peripheral surface of the cylindrical portion 11 at equal intervals (180 degree intervals) in the circumferential direction. That is, the two taps 43 are arranged in a substantially straight line with the cylindrical portion 11 in between. The taps 43 arranged in a straight line are arranged along the fin part 5 of the furnace wall 3, and the end of each tap 43 on the furnace wall 3 side and the fin part 5 are welded and fixed. Note that the number of taps 43 is not limited to two. It may be singular or may be a plurality of three or more. Moreover, when providing a plurality of taps 43, the plurality of taps 43 may be provided at irregular intervals in the circumferential direction.

According to this embodiment, the following effects are achieved.
In this embodiment, the temperature measuring device 41 can be fixed to the furnace wall 3 by welding and fixing the end of the tap 43 on the furnace wall 3 side to the fin portion 5 . Further, since only two taps 43 are fixed to the cylindrical portion 11, the fixing portion 42 can be formed with a simple configuration.

[Third embodiment]
Next, a third embodiment of the present disclosure will be described with reference to FIG.
In this embodiment, the main differences from the first embodiment are the structure of the fixing part that fixes the cylindrical part 11 to the furnace wall 3 and the structure and installation location of the main body. Therefore, the same components as those in the first embodiment are given the same reference numerals, and detailed descriptions thereof will be omitted.

The fixing portion 52 of the temperature measuring device 51 according to this embodiment has two ring portions (fixing means) 53 that fix the tubular portion 11 to a pin 54, one end of which is fixed to the furnace wall 3 and which supports the heat-insulating material 7 to the furnace wall 3. Each ring portion 53 has a tubular portion opening (not shown) through which the tubular portion 11 is inserted, and a pin opening (not shown) through which the pin 54 is inserted. The two ring portions 53 are provided at a predetermined distance apart in the axial direction of the tubular portion 11, and each supports one end of the tubular portion 11 or the other end of the tubular portion 11.

In addition, only the sensor unit 25 of the main body unit 55 is fixed to the tube portion 11. The housing 56 of the main body unit 55 is installed on the outer surface of the casing 8. Inside the housing 56, a circuit board (not shown), a wireless transmitter (not shown), and a battery (not shown) are housed. The main body unit 55 of this embodiment does not have a socket 28, and includes a third cable 57 that connects the sensor unit 25 and the circuit board.

According to this embodiment, the following advantageous effects are obtained.
In this embodiment, the cylindrical portion 11 is fixed to the pin 54 supporting the heat-insulating material 7 by the ring portion 53. This allows the temperature measuring device 51 to be installed in the furnace wall 3 by utilizing the pin 54 supporting the heat-insulating material 7. Therefore, it is possible to support the temperature measuring device 51 with a relatively simple structure without applying a complicated structure for installing the temperature measuring device 51 in the furnace wall 3.
In this embodiment, the temperature measuring device 51 is supported on the furnace wall 3 via the pin 54. The pin 54 is formed to be relatively thin and is therefore easily deformed. In this embodiment, the housing 56 housing the substrate, battery, etc. is not provided in the cylindrical portion 11 but is installed in the casing 8. This reduces the weight acting on the cylindrical portion 11. Therefore, even if the temperature measuring device is supported on the pin 54 which is easily deformed, the deformation of the pin 54 can be suppressed, and the temperature measuring device 51 can be preferably supported on the furnace wall 3.

[Fourth embodiment]
Next, a fourth embodiment of the present disclosure will be described using FIG. 14.
This embodiment differs from the first embodiment mainly in the structure of the fixing part that fixes the cylindrical part 11 to the furnace wall 3. Therefore, the same components as in the first embodiment are given the same reference numerals, and detailed description thereof will be omitted.
The fixing part 62 of the temperature measuring device 61 according to this embodiment has a spiral part 63 fixed to the outer peripheral surface of the cylindrical part 11. The spiral portion 63 protrudes from the outer circumferential surface of the cylindrical portion 11 and extends helically along the direction in which the cylindrical portion 11 extends.
Note that the cylindrical portion 11 and the spiral portion 63 may be formed integrally.

According to this embodiment, the following advantageous effects are obtained.
In this embodiment, a helical portion 63 extending in a helical shape is provided on the outer peripheral surface of the cylindrical portion 11. As a result, by pressing the cylindrical portion 11 against the relatively soft heat-insulating material 7 covering the furnace wall 3 while rotating it about the central axis, the cylindrical portion 11 is twisted into the heat-insulating material 7, and the helical portion 63 and the heat-insulating material 7 can be engaged with each other. By engaging the helical portion 63 with the heat-insulating material 7, the temperature measuring device 61 can be installed in the heat-insulating material 7. Therefore, the temperature measuring device 61 can be easily installed in the furnace wall 3 and the temperature of the measurement target portion can be measured without performing complicated operations such as removing the heat-insulating material 7 or welding.

[Fifth embodiment]
Next, a fifth embodiment of the present disclosure will be described using FIG. 15.
This embodiment differs from the first embodiment mainly in the structure of the fixing part that fixes the cylindrical part 11 to the furnace wall 3. Therefore, the same components as in the first embodiment are given the same reference numerals, and detailed explanation thereof will be omitted.
The fixed part 72 of the temperature measuring device 71 according to the present embodiment includes a magnet 73 provided at one end of the cylindrical part 11 and a rod (auxiliary part) 74 fixed to the upper plate part 15 and passing through the heat insulating material 7. , an adhesive 75 for bonding the magnet 73 and the furnace wall 3, and a magnetic circuit 76 including the magnet 73.

The magnet 73 has a substantially rectangular parallelepiped shape, and has an opening (not shown) formed substantially in the center. The cylindrical portion 11 is inserted through this opening. The magnet 73 supports the temperature measuring device 71 on the furnace wall 3 by being attracted to the furnace wall 3 . The rod 74 is fixed to the upper plate part 15 , extends linearly from the upper plate part 15 toward the furnace wall 3 , and penetrates the heat insulating material 7 . The end of the rod 74 on the furnace wall 3 side is in contact with the furnace wall 3 side. That is, the outer surface of the rod 74 and the heat insulating material 7 are in contact with each other, and the rod 74 is supported by the heat insulating material 7. The adhesive 75 is, for example, a ceramic adhesive 75, and is fired at a predetermined temperature (for example, 150 degrees) or higher to generate adhesive strength. The magnetic circuit 76 is provided along the cylinder part 11, the upper plate part 15, the rod 74, and the furnace wall 3, and forms a circuit including the magnet 73.

According to this embodiment, the following effects are achieved.
In this embodiment, a magnet 73 is provided at one end of the cylindrical portion 11. Thereby, for example, since the furnace wall 3 is made of metal to which the magnet 73 can be attracted, the temperature measuring device 71 can be supported by the furnace wall 3 by the attraction force of the magnet 73. Therefore, the temperature measuring device 71 can be easily installed on the furnace wall 3 without performing complicated work such as welding.
Moreover, since the cylinder part 11 is supported by the furnace wall 3 by the magnet 73 provided at one end, the cylinder part 11 is supported in a so-called cantilever shape. When the cylindrical portion 11 is supported in a cantilevered manner, a downward rotational moment is generated in the cylindrical portion 11 around the contact point between the magnet 73 and the furnace wall 3, so that the attraction of the magnet 73 is released. easy to be In this embodiment, the cylinder portion 11 is supported by the heat insulating material 7 by the rod 74 . Thereby, the cylindrical portion 11 can be supported not only by the magnet 73 but also by the heat insulating material 7. Therefore, in the configuration using the magnet 73, the temperature measuring device 71 can be firmly supported with respect to the furnace wall 3. In addition, since the heat insulating material 7 is used to assist the magnet 73, the temperature measurement device can assist the magnet 73 with a relatively simple structure without applying a complicated structure to assist the magnet 73. 71 can be firmly supported on the furnace wall 3.

In general, when the temperature of the object to be bonded becomes high, the adhesive force of the magnet 73 decreases. In this embodiment, the magnet 73 and the furnace wall 3 are bonded with the adhesive 75, which generates adhesive force at a predetermined temperature or higher. As a result, even if the temperature of the furnace wall 3 rises and the adhesive force of the magnet 73 decreases, the magnet 73 and the furnace wall 3 can be bonded by the adhesive force of the adhesive 75. That is, when the temperature of the furnace wall 3 is relatively low, such as at room temperature when the boiler 2 is stopped, the magnet 73 and the furnace wall 3 are bonded by the magnet 73, and when the boiler 2 starts operating and the temperature of the furnace wall 3 becomes higher than a predetermined temperature, the adhesive 75 is baked and bonds the magnet 73 and the furnace wall 3. Therefore, in a configuration using the magnet 73, the temperature measuring device 71 can be installed on the furnace wall 3 even when the temperature of the furnace wall 3 becomes high.

In this embodiment, a magnetic circuit 76 is formed by the magnet 73, the tube portion 11, the upper plate portion 15, the rod 74, and the furnace wall 3. By forming the magnetic circuit 76, the number of magnetic field lines increases, so that the attraction force of the magnet 73 can be improved. Therefore, the temperature measuring device 71 can be supported more firmly against the furnace wall 3.

Sixth Embodiment
Next, a sixth embodiment of the present disclosure will be described with reference to FIGS. 16A to 16C.
The temperature measuring device 91 according to this embodiment differs from the first embodiment mainly in the structure of the fixing part that fixes the cylindrical part 11 to the furnace wall (fixing target member) 3 and the structure of the main body. Also, it differs from the first embodiment in that it does not have an upper plate part 15. Therefore, the same components as those in the first embodiment are given the same reference numerals, and detailed description thereof will be omitted.

As shown in Figures 16A to 16C, the fixing portion 92 according to this embodiment is integrally provided with a rectangular parallel plate portion 92a that extends approximately parallel to the furnace wall 3 and is fixed to the tubular portion 11 that passes through the approximate center, a pair of vertical plate portions 92b that bend at approximately right angles from both ends of the parallel plate portion 92a and extend toward the furnace wall 3, and a pair of plate-shaped flange portions 92c that bend at approximately right angles from the end of each vertical plate portion 92b on the furnace wall 3 side and extend approximately parallel to the furnace wall 3.

The parallel plate portion 92a has a circular opening formed approximately in the center. The diameter of the opening is larger than the outer diameter of the cylindrical portion 11, and the cylindrical portion 11 is inserted through the opening. The parallel plate portion 92a is fixed via the first joint 20 to the outer peripheral surface of the cylindrical portion 11 inserted through the opening.

Each vertical plate part 92b is a plate-shaped member whose one end is connected to the longitudinal end of the parallel plate part 92a and extends from the end of the parallel plate part 92a to the fin part 5 of the furnace wall 3. The end of each vertical plate portion 92b on the furnace wall 3 side is in contact with or close to the furnace wall 3.

Each flange portion 92c is a plate-shaped member extending approximately parallel to the furnace wall 3, and has a bolt hole penetrating in the plate thickness direction. A bolt 92d is inserted into each bolt hole. The surface of each flange portion 92c facing the furnace wall 3 abuts or is close to the outer surface of the furnace wall 3 (specifically, the fin portion 5).

In addition, the fin portion 5 has recesses 94 formed at positions corresponding to the bolt holes. Specifically, the recesses 94 are formed in the fin portion 5 sandwiching one heat transfer tube 4 from the fin portion 5 facing the cylindrical portion 11. The recesses 94 have female threads that screw into male threads formed in the bolts 92d. In this way, the fixing portion 92 in this embodiment is fixed to the furnace wall 3 by screwing the bolts 92d that pass through the bolt holes formed in the flange portion 92c into the recesses 94 formed in the furnace wall 3. That is, unlike the fixing portion 12 in the first embodiment, the fixing portion 92 in this embodiment is not welded to the furnace wall 3. In this way, the recesses 94 and the fixing portion 92 form a fixing structure for fixing the temperature measuring device 1 to the furnace wall 3. The depth and diameter of the recesses 94 are set to a depth and diameter that do not affect the strength of the furnace wall 3.

The surface of the heat-insulating material 7 that is not covered by the casing 8 may be covered with aluminum foil. Also, as in the first embodiment, an upper plate portion 15 may be provided.

In the main body part 93 according to this embodiment, only the sensor part 25 is fixed to the cylindrical part 11, similarly to the third embodiment. The housing 93a of the main body portion 93 is installed on the outer surface of the casing 8. A board (not shown), a wireless transmitter (not shown), and a battery (not shown) are housed inside the casing 93a. The main body part 93 of this embodiment is not provided with the socket 28 and is provided with a fourth cable 95 that connects the sensor part 25 and the board.

According to this embodiment, the following effects are achieved.
Generally, when fixing a member to the furnace wall 3 of the boiler 2 by welding, it is necessary to polish the welded part before performing the welding work. Further, since high pressure acts on the furnace wall 3 of the boiler 2, it is necessary to perform an inspection to check for damage etc. after welding. Furthermore, even if high pressure is not applied to some parts, inspection may be performed after welding for safety reasons. In this way, when fixing a member to the furnace wall 3 of the boiler 2 by welding, polishing work and inspection processes are required in addition to the welding work, which lengthens the construction period and increases costs accordingly. There was a possibility that this problem would occur. In addition, since welding work requires special equipment and skills, it is necessary to prepare special equipment and mobilize skilled workers. As described above, the welding work itself is complicated, which is one of the reasons for the lengthening of the construction period.

In this embodiment, the fixing portion 92 that fixes the tubular portion 11 to the furnace wall 3 is fixed to the furnace wall 3 by screwing the bolt 92d into the recess 94. Therefore, there is no need to perform polishing work or an inspection process on the furnace wall 3. Therefore, the tubular portion 11 can be fixed to the furnace wall 3 more easily than when it is fixed by welding or the like. In this way, the fixing work can be simplified, which makes it possible to shorten the construction period and thereby suppress increases in costs.

In addition, in this embodiment, the bolt 92d and the recess 94 are screwed together. The recess 94 can be easily formed by a drill and a tap. Since no special equipment or skills are required, the on-site work of fixing the fixing part 92 to the furnace wall 3 can be simplified, and the fixing work can be further simplified. This makes it possible to further shorten the construction period and therefore suppress increases in costs.

[Seventh embodiment]
Next, a seventh embodiment of the present disclosure will be described using FIGS. 17 and 18.
This embodiment differs mainly from the first embodiment in that the temperature measuring device 81 does not include the temperature measuring section 13 and the fixing section 12, but instead includes a thermocouple 88 and an engaging section 83. It's different. The second embodiment is also different from the first embodiment in that it does not include the cylindrical portion 11. Furthermore, the structure of the main body is different from the first embodiment. In other respects, the second embodiment is substantially the same as the first embodiment, so the same components as the first embodiment are denoted by the same reference numerals, and detailed explanation thereof will be omitted.

In this embodiment, a recess 84 is formed in the fin portion 5 of the furnace wall 3, which is the measurement target site. The temperature measuring device 81 also includes an engaging portion 83 that engages with the recess 84 and a thermocouple 88 that is held by the engaging portion. Further, in the temperature measuring device 81 according to the present embodiment, the main body portion is installed on the outer surface of the casing 8. A substrate (not shown), a wireless transmitter (not shown), and a battery (not shown) are housed inside a casing 82a that forms the outer shell of the main body 82. The main body portion 93 of this embodiment includes a fifth cable 90 that connects the thermocouple 88 and the board.

The engaging portion 83, thermocouple 88, and recess 84 will be described in detail below.
As shown in FIG. 18, the engaging portion 83 includes a main body portion 85 having a tip portion 85a that engages with a recess 84 formed in the furnace wall 3, a presser bolt 86 that screws into the main body portion 85, and a main body portion. 85 and a presser bolt 86, and a thermocouple 88 provided vertically through the main body 85 and the like.

The main body portion 85 integrally includes a tip portion 85a that engages with the recess 84, a base portion 85b that screws into the presser bolt 86, and an intermediate portion 85c that connects the tip portion 85a and the base portion 85b.

The tip 85a is a cylindrical member extending along the central axis C, and has a male screw (threaded portion) formed on the outer circumferential surface. This male screw is formed so that it can be screwed into the female screw formed in the recess 84. The outer diameter of the tip 85a is set slightly smaller than the diameter L1 of the recess 84, and the tip 85a is configured so that it can be inserted into the recess 84. The length of the tip 85a in the direction along the central axis C (hereinafter referred to as the "extending direction") is set longer than the depth L2 of the recess 84. In other words, when the tip 85a is screwed into the recess 84, the end on the base end side (the side opposite the tip) protrudes from the recess 84. The inner diameter of the tip 85a is set larger than the diameter C3 of the thermocouple 88.

The thickness L4 of the tip 85a (the length of the shortest distance from the inner circumferential surface to the outer circumferential surface) is set to a thickness that does not damage the engagement portion 83 in normal use and has a lower strength than the furnace wall 3 (specifically, the fin portion 5). For example, L4 is preferably set to 0.5 mm or more and 3.0 mm or less. Examples of a thickness that does not damage the engagement portion 83 in normal use include a thickness that is not damaged by the weight of the engagement portion 83 itself and a thickness that is not damaged by the load acting when the tip 85a and the recess 84 are screwed together. Examples of a thickness that has a lower strength than the fin portion 5 include a thickness that breaks the engagement portion 83 before damaging the furnace wall 3 even if an unexpected external force acts on the engagement portion 83.

The intermediate portion 85c is a cylindrical member that connects to the base end of the tip portion 85a and is arranged so as to be coaxial with the tip portion 85a. The outer diameter of the intermediate portion 85c is set to be larger than the outer diameter of the tip portion 85a. The inner diameter of the intermediate portion 85c is set to be the same length as the inner diameter of the tip portion 85a and is set to be larger than the diameter C3 of the thermocouple 88. The inner peripheral surface of the intermediate portion 85c and the inner peripheral surface of the tip portion 85a are flush with each other. In addition, a male thread is formed on the outer peripheral surface of the intermediate portion 85c.

The base portion 85b is a cylindrical member that connects to the proximal end of the intermediate portion 85c, and is provided with a recessed portion 85d on the proximal side. The base portion 85b is provided coaxially with the tip portion 85a and the intermediate portion 85c. The outer diameter of the base portion 85b is set larger than the outer diameter of the intermediate portion 85c. The inner diameter of the base portion 85b is set to be the same length as the inner diameters of the tip portion 85a and the intermediate portion 85c, and is set larger than the diameter C3 of the thermocouple 88. The inner circumferential surface of the base portion 85b and the inner circumferential surface of the intermediate portion 85c are flush with each other. The recessed portion 85d is formed to have a substantially circular shape when the furnace wall 3 is viewed from the front. A female thread is formed on the inner peripheral surface of the recessed portion 85d.

The press bolt 86 is a cylindrical member having a cylindrical base portion 86a and a cylindrical protruding portion 86b protruding from the base portion 86a. The base portion 86a and the protruding portion 86b are provided so as to be coaxial with the tip portion 85a, the intermediate portion 85c, and the base portion 85b.
A male screw is formed on the outer peripheral surface of the protruding portion 86b. This male screw is formed so as to be able to screw into the female screw formed in the recessed portion 85d. The outer diameter of the protruding portion 86b is set to be slightly smaller than the diameter of the recessed portion 85d so that the protruding portion 86b can be inserted into the recessed portion 85d. The inner diameter of the protruding portion 86b is set to be the same length as the inner diameter of the base portion 85b and is set to be larger than the diameter C3 of the thermocouple 88. The inner peripheral surface of the protruding portion 86b and the inner peripheral surface of the base portion 85b are flush with each other.
The outer diameter of the base portion 86a is set to be approximately the same as the outer diameter of the base portion 85b. The inner diameter of the base portion 86a is set to be the same length as the inner diameter of the protruding portion 86b and is set to be larger than the diameter C3 of the thermocouple 88. The inner peripheral surface of the base portion 86a and the inner peripheral surface of the protruding portion 86b are flush with each other.

The caulking portion 87 is a substantially conical member, and has a through hole penetrating in the vertical direction. The diameter of the through hole is set to be the same length as the inner diameter of the base portion 85b, and is set slightly larger than the diameter C3 of the thermocouple 88. The caulking portion 87 is sandwiched between the protrusion 86b and the base 85b by screwing the protrusion 86b of the presser bolt 86 into the recess 85d of the base 85b. By being sandwiched in this manner, the thermocouple 88 inserted through the through hole is caulked and fixed. This restricts relative movement between the thermocouple 88 and the main body portion 85.

The thermocouple 88 is a device that measures the temperature of the member it comes into contact with, and is a so-called sheath thermocouple. The thermocouple 88 is provided so as to pass through the main body portion 85, the caulking portion 87, and the holding bolt 86. The tip of the thermocouple 88 is provided so as to protrude beyond the tip of the tip portion 85a, and is in contact with the bottom surface of the recess 84. The diameter of the thermocouple 88 is set to 3.2 mm or less. The temperature measuring device 81 transmits the temperature measured by the thermocouple 88 to the main body via the fifth cable 90, and further transmits the temperature wirelessly from a transmitter (not shown) to the control device 9.

A recess 84 is formed in the furnace wall 3 and is recessed from the outer surface. Specifically, it is formed in the fin portion 5 of the furnace wall 3. The recess 84 is formed to have a substantially circular shape when the furnace wall 3 is viewed from the front. The diameter of the recess 84 is slightly larger than the diameter of the tip 85a. A female thread is formed on the inner peripheral surface of the recess 84 over the entire circumferential area, and when this female thread is engaged with the male thread of the tip 85a, the engaging portion 83 and the furnace wall 3 are fixed. be done.
The diameter L1 of the recess 84 is set to be 3 mm or more and 6 mm or less. Further, the depth L2 of the recess 84 (the length from the outer surface of the fin portion 5 to the bottom surface of the recess 84) is set such that the thickness L5 of the fin portion 5 at the location where the recess 84 is formed is 1.5 mm or more. has been done. That is, the recessed portion 84 is formed such that the remaining thickness L5 of the fin portion 5 is 1.5 mm or more.

The recess 84 is formed as follows.
First, the fin portion 5 is drilled with a drill or the like. Next, a tap is inserted into the recess 84 formed by the drilling operation, and the tap is manually moved to form a female screw on the inner peripheral surface of the recess 84. In this manner, the recess 84 is formed.

According to this embodiment, the following effects are achieved.
Generally, when fixing a member to the furnace wall 3 of the boiler 2 by welding, it is necessary to polish the welded part before performing the welding work. Further, since high pressure acts on the furnace wall 3 of the boiler 2, it is necessary to perform an inspection to check for damage etc. after welding. Furthermore, even if high pressure is not applied to some parts, inspection may be performed after welding for safety reasons. In this way, when fixing a member to the furnace wall 3 of the boiler 2 by welding, polishing work and inspection processes are required in addition to the welding work, which lengthens the construction period and increases costs accordingly. There was a possibility that this problem would occur. In addition, since welding work requires special equipment and skills, it is necessary to prepare special equipment and mobilize skilled workers. As described above, the welding work itself is complicated, which is one of the reasons for the lengthening of the construction period.

In this embodiment, an engaging portion 83 that fixes the thermocouple 88 to the furnace wall 3 engages with a recess 84 formed in the furnace wall 3. Therefore, there is no need to perform a polishing operation or an inspection process on the furnace wall 3. Therefore, the thermocouple 88 can be fixed to the furnace wall 3 more easily than when it is fixed by welding or the like. Since the fixing work can be simplified in this way, the construction period can be shortened, and an increase in costs can be suppressed accordingly.

Further, in this embodiment, the engaging portion 83 and the recess 84 are engaged with each other by screwing the tip portion 85a and the recess 84 together. A male thread can be formed in advance on the tip 85a, and the recess 84 can be easily formed with a drill and a tap. Since special equipment and skills are not required in this way, it is possible to simplify the on-site work in fixing the thermocouple 88 to the furnace wall 3, which further simplifies the fixing work. Can be done. Therefore, it is possible to further shorten the construction period, and accordingly, it is possible to suppress an increase in costs.

Further, the thermocouple 88 measures the temperature by coming into contact with the inner surface of the recess 84 . That is, the temperature inside the furnace wall 3 is measured. Thereby, compared to the case where the temperature of the surface of the furnace wall 3 is measured, it is possible to make it less susceptible to influences from the outside of the furnace wall 3. Therefore, compared to the case where the temperature of the surface of the furnace wall 3 is measured, the temperature can be measured more accurately.

By forming the recess 84, the thickness L5 of the fin section 5 becomes thinner at the location where the recess 84 is formed compared to other areas. Therefore, if the depth L2 of the recess 84 is made too long, the strength of the furnace wall 3 may be reduced and the furnace wall 3 may become more susceptible to damage. In this embodiment, the depth L2 of the recess 84 is set so that the remaining thickness L5 of the fin section 5 is 1.5 mm or more. In this way, the recess 84 is formed so that the remaining thickness L5 of the fin section 5 is not made too thin, so that the reduction in the strength of the furnace wall 3 is suppressed and the furnace wall 3 is less likely to be damaged.

Furthermore, if the diameter L1 of the recess 84 is made too large, the strength of the furnace wall 3 may decrease, making the furnace wall 3 more susceptible to damage. In this embodiment, the diameter L1 of the recess 84 is set to 6 mm or less. In this manner, by forming the recess 84, it is possible to suppress a decrease in the strength of the furnace wall 3 and make the furnace wall 3 less susceptible to damage.
On the other hand, if the diameter L1 of the recess 84 is made too small, the outer diameter of the tip portion 85a inserted into the recess 84 must also be made small, and accordingly, the thickness L4 of the tip portion 85a must be made thin, which may result in the strength of the tip portion 85a being lower than required. In this embodiment, the diameter L1 of the recess 84 is set to 3 mm or more. In this way, by forming the recess 84, the strength of the tip portion 85a can be made higher than required. The required strength of the tip portion 85a is a thickness that does not damage the engagement portion 83 in normal use, such as a thickness that is not damaged by the weight of the engagement portion 83 itself, or a thickness that is not damaged by the load acting when the tip portion 85a and the recess 84 are screwed together.

[Modification 1]
Next, a modification (modification 1) of this embodiment will be described using FIG. 19.
In this modification, the outer diameter of the intermediate portion 85c is approximately the same length as the outer diameter of the tip portion 85a, and the abutting portion 89 is screwed into the outer peripheral surface of the intermediate portion 85c. , which is different from the seventh embodiment. The same components as in the seventh embodiment are given the same reference numerals, and detailed description thereof will be omitted.

The contact portion 89 is an annular member and is provided coaxially with the intermediate portion 85c. The outer diameter of the contact portion 89 is the same length as the outer diameter of the base portion 85b. Further, the inner diameter of the contact portion 89 is set to be slightly larger than the outer diameter of the intermediate portion 85c. Furthermore, a female thread is formed on the inner circumferential surface of the contact portion 89. This female thread is formed so that it can be screwed into a male thread formed on the outer peripheral surface of the intermediate portion 85c. Further, the surface of the contact portion 89 on the furnace wall 3 side (hereinafter referred to as the “contact surface”) is inclined so that the thickness of the contact portion 89 becomes thinner toward the outer circumferential side. The connecting portion between the fin portion 5 of the furnace wall 3 and the heat transfer tube 4 bulges in the direction of the engaging portion 83, and the contact surface abuts or is close to this bulging connecting portion.

This modification provides the following effects.
In this modification, the engaging portion 83 has a contact portion 89 that contacts the furnace wall 3 . As a result, even if a load is applied to the engaging portion 83 in a direction intersecting the central axis C of the recess 84, the abutting portion 89 is in contact with the furnace wall 3, so that the abutting portion 83 The engaging portion 83 can be supported by the portion 89 . Therefore, the engaging portion 83 can be made less likely to incline with respect to the central axis C of the recessed portion 84. Therefore, the engagement between the engaging portion 83 and the recessed portion 84 can be made difficult to be disengaged.

[Modification 2]
Next, a modification (modification 2) of this embodiment will be described with reference to FIG.
This modification differs from the seventh embodiment in that the engaging portion 96 of this modification does not have a male thread formed on the outer circumferential surface of the tip portion 97 and the intermediate portion 98. It also differs from the seventh embodiment in that the recess 99 does not have a female thread formed. The same components as those in the seventh embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted.
In this modification, after the tip portion 97 is inserted into the recess 99, the edge P of the recess 99 is pressed toward the tip portion 97 (in the direction of the arrow in FIG. 20 ) to crimp the recess 99 and the tip portion 97. This configuration also makes it possible to fix the recess 99 and the tip portion 97 together.

[Modification 3]
Next, a modification (modification 3) of this embodiment will be described using FIG. 21.
In this modification, the engaging portion 101 does not include the base portion 85b, the presser bolt 86, and the caulking portion 87, but instead includes a cap nut 102 and a spring (biasing portion) 103, which is the seventh embodiment. There is a difference between The same components as in the seventh embodiment are given the same reference numerals, and detailed description thereof will be omitted. In addition, in FIG. 21, for illustration reasons, the male threads formed on the outer circumferential surfaces of the tip portion 85a and the intermediate portion 85c, and the female threads formed on the inner circumferential surfaces of the recess 84 and the cap nut 102 are omitted. are doing.

The engagement portion 101 of this modified example has a tip portion 85a, an intermediate portion 85c, a cap nut 102, and a spring 103. The configuration of the tip portion 85a and the intermediate portion 85c is the same as in the seventh embodiment, so a detailed description thereof will be omitted.

The cap nut 102 has a cylindrical portion 104 and a closing portion 105 that closes an opening formed at one end of the cylindrical portion 104. A female thread is formed on the inner peripheral surface of the cylindrical portion 104. The cap nut 102 and the intermediate portion 85c are engaged with each other by screwing this female screw with a male screw formed on the outer peripheral surface of the intermediate portion 85c. A space S is formed between the intermediate portion 85c and the closing portion 105, and a spring 103 whose one end is fixed to the closing portion 105 is housed in the space S.

A through hole is formed in the cap nut 102, and the thermocouple 88 is inserted into the through hole. A pressure plate 106 is fixed to the portion of the thermocouple 88 located in the space S. The pressure plate 106 is a disk-shaped member, and its inner peripheral surface is fixed to the outer peripheral surface of the thermocouple 88. Although the thermocouple 88 passes through the interior of the intermediate portion 85c and the tip portion 85a, it is not fixed to the intermediate portion 85c and the tip portion 85a. Therefore, the thermocouple 88 is movable relative to the intermediate portion 85c and the tip portion 85a.

One end of the spring 103 is fixed to the closing portion 105, and the other end is fixed to the pressure plate 106. The spring 103 also urges the pressure plate 106 toward the middle portion 85c. In other words, since the pressure plate 106 is fixed to the thermocouple 88, the spring 103 urges the thermocouple 88 toward the recess 84 formed in the furnace wall 3.

According to this modified example, the following advantageous effects are achieved.
In this modification, the engaging portion 101 has a spring 103 that urges the thermocouple 88 toward the recess 84. As a result, the spring 103 urges the thermocouple 88 toward the recess 84, so that even if the engaging portion 101 thermally expands, for example, the thermocouple 88 can be brought into contact with the inner surface of the recess 84 and the temperature can be measured.

Note that the present disclosure is not limited to the inventions according to the embodiments described above, and can be modified as appropriate without departing from the gist thereof.
For example, if a temperature measuring device not provided with an aperture 14 is improved to provide a temperature measuring device with an aperture 14, the temperature measured by the temperature measuring device is transmitted to the control device 9 through the opening of the aperture 14. The temperature of the measurement target site may be calculated by correcting the temperature based on the rate. In other words, if the aperture 14 is added to a temperature measurement device that does not have an aperture 14, the temperature measured by the temperature measurement device will be lower than the actual temperature of the measurement target region by the amount of light received by the aperture 14. The temperature will also be low. Therefore, the control device 9 stores a conversion table or a conversion formula based on the aperture ratio of the aperture 14 (that is, how much the amount of light received by the aperture 14 is reduced), and converts the temperature measured by the temperature measurement device. The temperature may be corrected using a table or a conversion formula, and the corrected temperature may be used as the temperature of the measurement target site. In this case, the sensor section 25, the substrate 29, and the control device 9 constitute a temperature measuring means.

In addition, in each of the above embodiments, an example has been described in which a device that measures the temperature of the measurement target part based on the intensity of the radiant light received by the sensor part 25 is used as the temperature measurement part 13, but the present disclosure is not limited to this. For example, a device that measures the temperature of the measurement target part by pressing two thermocouples against the measurement target may be used. Even with such a temperature measurement part, when installing the temperature measurement device, there is no need to perform special processing for temperature measurement, such as welding, on the measurement target part. Therefore, the time required to install the temperature measurement device can be shortened and installation costs can be reduced.

Moreover, instead of the bolt of the sixth embodiment, an engaging part of the seventh embodiment may be provided, and the engaging part may include a thermocouple as in the seventh embodiment. That is, both the temperature measuring section 13 and the thermocouple 88 may be provided. In this configuration, the engaging portion plays the role of fixing the fixing portion. With this configuration, the temperature of the furnace wall 3 can be measured by both the temperature measuring section 13 and the thermocouple 88, so the reliability of temperature measurement can be improved.

Reference Signs List 1 Temperature measuring device 3 Furnace wall 4 Heat transfer tube 5 Fin section 7 Thermal insulation material 8 Casing 9 Control device 11 Cylinder section 12 Fixing section 13 Temperature measuring section (temperature measuring means)
14 Aperture (aperture section)
Reference Signs List 15 Upper plate portion 17 L-shaped portion 18 Lower plate portion 19 Heat insulating spacer 20 First joint 21 Bolt 22 Nut 23 Bolt hole 25 Sensor portion 26 Main body portion 27 Housing 28 Socket 29 Board 30 Wireless transmitter 31 Battery 34 Second joint 36 Measurement target portion determination device 37 Optical fiber thermometer 38 Prediction portion 41 Temperature measurement device 42 Fixing portion 43 Tap (plate portion)
51 Temperature measuring device 52 Fixing part 53 Ring part (fixing means)
54 Pin 55 Main body 56 Housing 61 Temperature measuring device 62 Fixing part 63 Spiral part 71 Temperature measuring device 72 Fixing part 73 Magnet 74 Rod (auxiliary part)
75 Adhesive 76 Magnetic circuit 81 Temperature measuring device 82 Main body 82a Housing 83 Engagement portion 84 Recess 85 Main body 85a Tip portion 85b Base portion 85c Middle portion 85d Recess portion 86 Press bolt 86a Foundation portion 86b Protrusion portion 87 Crimping portion 88 Thermocouple 89 Contact portion 90 Fifth cable 91 Temperature measuring device 92 Fixing portion 92a Parallel plate portion 92b Vertical plate portion 92c Flange portion 92d Bolt 93 Main body 93a Housing 94 Recess 95 Fourth cable 96 Engagement portion 97 Tip portion 98 Middle portion 99 Recess 101 Engagement portion 102 Cap nut 103 Spring 104 Cylindrical portion 105 Closure portion 106 Pressing plate

Claims (9)

A temperature measuring device that measures the temperature of a furnace wall of a boiler, which is a measurement target part,
a cylindrical part that extends in a predetermined direction, has an opening formed at one end, and is arranged so that the opening faces and opposes the furnace wall that is the measurement target site;
A sensor section is provided inside the cylindrical section and receives radiation light from the measurement target site, and the temperature of the measurement target site is measured based on the intensity of the radiation light received by the sensor section; a first temperature measuring means provided at the other end of the cylindrical portion;
a diaphragm part provided between the first temperature measuring means and the measurement target part, which limits the field of view seen from the first temperature measuring means more than the opening so that the field of view seen from the first temperature measuring means is mainly viewed from the measurement target part; Prepare,
The throttle part is a temperature measuring device provided inside the other end of the cylinder part. a plate portion extending radially from an outer circumferential surface of one end of the cylindrical portion and fixed to the outer circumferential surface by welding;
The temperature measuring device according to claim 1, wherein an end of the plate portion on the measurement target site side protrudes further toward the measurement target site than an end of the cylinder portion on the measurement target site side. The temperature measuring device according to claim 1, further comprising a fixing means for fixing the cylindrical portion to a pin that supports a heat insulating material covering the measurement target region on a member on the measurement target region. 2. The temperature measuring device according to claim 1, wherein the outer circumferential surface of the cylindrical portion is provided with a spiral portion that protrudes from the outer circumferential surface and extends spirally along the predetermined direction. A magnet provided at one end of the cylindrical portion;
The temperature measuring device according to claim 1 , further comprising an auxiliary portion connected to the cylindrical portion and supporting the cylindrical portion against a heat insulating material covering the measurement target portion. comprising an adhesive that adheres the magnet and the member on the measurement target site side,
6. The temperature measuring device according to claim 5, wherein the adhesive exhibits adhesive force at a predetermined temperature or higher. The auxiliary part is in contact with a member on the measurement target site side,
The temperature measuring device according to claim 5 or 6, wherein a magnetic circuit including the magnet is formed in the cylinder portion and the auxiliary portion. a fixing portion for fixing the cylindrical portion to a fixing target member,
The temperature measuring device according to claim 1 , wherein the fixing portion has an engagement portion that engages with a recess formed in the fixing target member. the fixed target member is a measurement target member that is a member having the measurement target portion,
The temperature measuring device according to claim 8 , wherein the fixing portion has a second temperature measuring means that comes into contact with an inner surface of the recess and measures the temperature of a member in contact with the second temperature measuring means.

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