KR20200038122A - Integrated hybrid leak detecting device for liquid metal and leak detecting system for liquid metal having the same - Google Patents

Abstract

An integrated hybrid liquid metal leak detector according to an embodiment of the present invention comprises: a first leak detection unit and a second leak detection unit adjacent to each other in a first direction among the first direction, a second direction, and a third direction perpendicular to each other. Each of the first and second leak detection units includes: a body portion having a polygonal cross-section parallel to a plane perpendicular to the third direction; a leak detection portion embedded in the body portion and detecting a liquid metal leak; and a pair of contact portions located on both sides of the body portion, spaced apart from each other in the second direction, and extending in the third direction to come into contact with a liquid metal transport pipe. A first liquid metal collection inducing entrance is located between the pair of contact portions, and a second liquid metal collection inducing entrance is located in the first direction between the contact portion of the first leak detection unit and the contact portion of the second leak detection unit. The integrated hybrid liquid metal leak detector can rapidly detect even a small amount of leak of liquid metal.

Description

INTEGRATED HYBRID LEAK DETECTING DEVICE FOR LIQUID METAL AND LEAK DETECTING SYSTEM FOR LIQUID METAL HAVING THE SAME}

An integrated composite liquid metal leak detector and a liquid metal leak detection system comprising the same are provided.

Liquid metals, such as alkali metals, have the property of easily reacting when they come into contact with oxygen or water in the air at room temperature. In the case of liquid metal handling facilities such as high-speed reactors, high-temperature liquid metals leak to the outside of containers and piping It can react with oxygen or moisture in the air and cause a fire with many mists. Therefore, there is a need to quickly detect a leak of the liquid metal by properly installing a leak detection device in a container, piping, or equipment using the liquid metal.

Potential leakage sites of containers or pipes using liquid metal are areas where welds, high stress areas and thermal fatigue are generated, and should be avoided in all processes including design, manufacture, quality assurance, operation and maintenance of the relevant containers and pipes. Although steps are taken to prevent leakage, the possibility of leakage of liquid metal cannot be completely ruled out. Therefore, in order to minimize leakage of liquid metal, it is very important to detect the leak early and react quickly.

Korean Registered Patent No. 1,463,302 discloses a device that detects whether a liquid metal leaks by generating a signal when a plurality of sensing lines are in contact with the liquid metal, and Korean Registered Patent No. 1,570,075 discloses whether a liquid metal leaks due to a difference in flow rate. Disclosed is a device for sensing.

Korean Registered Patent No. 1,463,302 Korean Registered Patent No. 1,570,075

An integrated composite liquid metal leak detector and a liquid metal leak detection system including the same according to an embodiment of the present invention are for easily introducing leaked liquid metal.

An integrated composite liquid metal leak detector and a liquid metal leak detection system including the same according to an embodiment of the present invention are for quickly detecting even a small amount of liquid metal leak.

An integrated composite liquid metal leak detector and a liquid metal leak detection system including the same according to an embodiment of the present invention are intended to minimize the possibility of malfunction due to contact with a metallic foreign material or a fixing strap.

An integrated composite liquid metal leak detector and a liquid metal leak detection system including the same according to an embodiment of the present invention are intended to improve detection reliability and stability by detecting whether a liquid metal leaks as a double.

The integrated composite liquid metal leak detector and the liquid metal leak detection system including the same according to an embodiment of the present invention are for performing a detection function even when some functions are disabled.

An integrated composite liquid metal leak detector and a liquid metal leak detection system including the same according to an embodiment of the present invention are intended to improve installation ease and efficiency for a liquid metal transfer pipe.

An integrated composite liquid metal leak detector according to an embodiment of the present invention includes a first leak detection unit and a second leak detection unit adjacent to each other in a first direction among a first direction, a second direction, and a third direction perpendicular to each other. Includes.

At this time, each of the first leak detection unit and the second leakage detection unit is a body part having a polygonal cross-section parallel to a plane perpendicular to the third direction and a body part embedded in the body part, and leaks to detect leaked liquid metal A sensing part, and a pair of contact parts located on both sides of the body part, spaced apart in the second direction, and extending in the third direction to contact the liquid metal transport pipe, and collecting the first liquid metal between the pair of contact parts An induction port is located, and a second liquid metal collection induction port is located between the contact portion of the first leak detection unit and the second leak detection unit in the first direction.

An integrated composite liquid metal leak detector and a liquid metal leak detection system including the same according to an embodiment of the present invention can easily introduce a leaked liquid metal, and quickly leak a small amount of liquid metal, It is possible to minimize the possibility of malfunction due to contact with metallic foreign substances or fixing straps, and it is possible to improve the reliability and stability of detection by double detecting the leakage of liquid metal, and to detect the detection function even when some functions are disabled. It is possible to improve the ease of installation and efficiency for the liquid metal transport pipe.

1A and 1B are diagrams showing a typical liquid metal leak detector.
2 is a view schematically showing a side surface of an integrated composite liquid metal leak detector according to an embodiment.
3 is a view schematically showing a plane of an integrated composite liquid metal leak detector according to an embodiment.
4 is a view schematically showing an end face of an integrated composite liquid metal leak detector according to an embodiment.
5A is a view showing a leak detection unit according to an embodiment in three sections, and FIG. 5B is a perspective view of a leak detection unit according to the embodiment.
6 is a view showing an optical fiber and a metal coating layer according to an embodiment.
7 is an enlarged view showing a plane of an integrated composite liquid metal leak detector according to an embodiment.
8 is an enlarged view showing a side surface of an integrated composite liquid metal leak detector according to an embodiment.
9 is a view showing examples in which the leaked liquid metal is contacted to the integrated composite liquid metal leak detector according to the embodiment.
10 is a view schematically showing an embodiment in which an integrated composite liquid metal leak detector according to an embodiment is fixed to a liquid metal transfer pipe.
11 is a view schematically showing an embodiment in which an integrated composite liquid metal leak detector according to an embodiment is fixed to a liquid metal transfer pipe.
12 is a view schematically showing an embodiment in which an integrated composite liquid metal leak detector according to an embodiment is fixed to a liquid metal transfer pipe.

The embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art to which the present invention pertains can easily practice. The present invention can be implemented in many different forms and is not limited to the embodiments described herein. In the drawings, parts not related to the description are omitted in order to clearly describe the present invention, and the same reference numerals are used for the same or similar elements throughout the specification. In the case of well-known technology, detailed description thereof will be omitted.

In the drawings, thicknesses are enlarged to clearly represent various layers and regions. When a portion of a layer, film, region, plate, etc. is said to be “above” another portion, this includes not only the case “directly above” the other portion but also another portion in the middle. On the other hand, when one part is "just above" another part, it means that there is no other part in the middle. Conversely, when a portion of a layer, film, region, plate, etc. is said to be “under” another portion, this includes not only the case “underneath” another portion, but also another portion in the middle. On the other hand, when one part is "just below" another part, it means that there is no other part in the middle.

Throughout the specification, when a part “includes” a certain component, this means that other components may be further included rather than excluding other components unless otherwise specified.

1A and 1B are diagrams showing a typical liquid metal leak detector.

1A and 1B, a typical liquid metal leak detector 10 includes a ceramic insulator 12 and a plurality of metal wires 14, and a two wire leak detector that operates according to the energized principle. (10).

Here, a portion of the metal wire 14 is embedded in the ceramic insulator 12, and a portion is exposed to the outside to form the exposed portion 14 '. Due to the exposure of a portion of the metal wire 14, the leaked liquid metal may wet and flow down the ceramic insulator 12 or a portion of the metal wire 14 to delay or not generate a leak signal, and the exposed portion 14 ') May malfunction if it comes into contact with energized foreign substances, and when the leak detector 10 is installed in a pipe or container, interference with a metallic fixing strap (not shown) may occur, and the fixing strap (not shown) may be removed. In this case, it may malfunction due to contact with the exposed portion 14 ', and if the metal wire 14 is disconnected or an abnormality occurs in a circuit system (not shown) connected to the metal wire 14, a leak alarm may not be generated. have.

On the other hand, in the case of the integrated composite liquid metal leak detector according to the embodiment, it is possible to minimize delay or non-occurrence of leakage signal generation, and to stably detect leakage even when a small amount of liquid metal is leaked, and conducting foreign matter or fixing The possibility of malfunction can be minimized by preventing contact with the strap and the metal wire, and leakage can be detected even when a disconnection of the metal wire or an abnormality occurs in a circuit system connected to the metal wire.

Hereinafter, an integrated composite liquid metal leak detector will be described in detail with reference to the drawings.

2 is a view schematically showing a side surface of the integrated composite liquid metal leak detector according to the embodiment, FIG. 3 is a view schematically showing a plane of the integrated composite liquid metal leak detector according to the embodiment, and FIG. 4 is in the embodiment It is a diagram schematically showing an end face of an integrated composite liquid metal leak detector according to the present invention, FIG. 5A is a diagram showing a leak detection unit according to an embodiment in three sections, and FIG. 5B is a perspective view of a leak detection unit according to the embodiment. In the case of FIG. 2, a liquid metal transfer pipe and an integrated composite liquid metal leak detector are illustrated, and in the case of FIGS. 3 to 5B, the liquid metal transfer pipe is omitted for convenience of description.

2 to 5B, the integrated composite liquid metal leak detector 100 includes a first leak detection unit DU1 adjacent to each other in a first direction among a first direction, a second direction, and a third direction perpendicular to each other. And a second leak detection unit DU2.

In the present specification, the first direction, the second direction, and the third direction mean the first direction, the second direction, and the third direction shown in FIG. 2. The first direction means the longitudinal direction (transverse direction in FIG. 2) of the liquid metal transfer pipe 102 in FIG. 2, the second direction is perpendicular to the first direction, and the third direction is the first direction and the second direction It means the direction perpendicular to all (vertical direction in FIG. 2). In addition, a plane perpendicular to the third direction is defined as a first plane, a plane perpendicular to the second direction is defined as a second plane, and a plane perpendicular to the first direction is defined as a third plane. The first surface includes a first direction and a second direction, the second surface includes a first direction and a third direction, and the third surface includes a second direction and a third direction. The second side and the third side are perpendicular to each other.

FIG. 2 shows a cross section parallel to the second surface of the integrated composite liquid metal leak detector 100, and FIG. 3 cuts the integrated composite liquid metal leak detector 100 of FIG. 2 into a plane parallel to the first surface. A cross section is shown, and FIG. 4 can be seen as a cross-sectional view of the integrated composite liquid metal leak detector 100 of FIG. 2 cut into a plane parallel to the third surface.

The integrated composite liquid metal leak detector 100 includes two or more leak detection units, of which two adjacent leak detection units are a first leak detection unit DU1 and a second leak detection unit DU2. The first leakage detection unit DU1 and the second leakage detection unit DU2 refer to two leakage detection units DU1 and DU2 at arbitrary positions among a plurality of leakage detection units, and are limited to the positions indicated in the drawings. Does not work. The integrated composite liquid metal leak detector 100 may include three or more leak detection units, and the leak detection units may be arranged in various numbers as necessary.

Each of the first leakage detection unit DU1 and the second leakage detection unit DU2 has body parts 110a and 110b having a polygonal cross-sectional shape parallel to a surface (first surface) perpendicular to the third direction. It is buried in the parts 110a and 110b, and is located on both sides of the leak detectors 140a and 140b for sensing the leaked liquid metal, and the body parts 110a and 110b, spaced apart in the second direction, and third It includes a pair of contact portions 120a and 120b that extend in the direction and have a predetermined height to contact the liquid metal transfer pipe 102.

The shape of the cross section parallel to the first surface in the body portions 110a and 110b may be, for example, an octagonal shape (see FIGS. 3, 5A and 5B), and the pair of contact portions 120a and 120b are In the octagonal shape, they may be located in side regions facing each other (see FIGS. 4, 5A, and 5B).

The pair of contact portions 120a and 120b extending in the third direction face each other, are spaced apart from each other, and the first liquid metal collection guide port 125 is present between the pair of contact portions 120a and 120b. do. When a leak of the liquid metal 101 occurs at a position corresponding to the first liquid metal collection induction port 125 in the liquid metal transfer pipe 102, the leaked liquid metal 101 has a leak detector 140 It may be directly dropped into the area in which it is located, or may descend on the inner surfaces of the contact portions 120a and 120b and flow into the leak detection units 140a and 140b.

Each of the first leakage detection unit DU1 and the second leakage detection unit DU2 may have a concave shape in which a cross section parallel to a surface (third surface) perpendicular to the first direction.

Also, corners of each of the first leak detection unit DU1 and the second leak detection unit DU2 may be rounded. Due to the rounded edges of the contacts 120a and 120b, adhesion to the liquid metal transfer pipe 102 may be improved, and the edges of the body portions 110a and 110b are rounded to provide a first leak detection unit DU1. And a fixing strap (not shown, to be described later) for fixing the second leak detection unit DU2 to the liquid metal transfer pipe 102.

A second liquid metal collection guide 130 is positioned between the contact portion 120a of the first leak detection unit DU1 and the contact portion 120b of the second leak detection unit DU2 in the first direction (FIG. 2 and See Figure 5a).

If the liquid metal transfer pipe 102 is defective and the liquid metal 101 leaks, and the leaked portion is not in a position corresponding to the first liquid metal collection guide port 125 described above, the transfer pipe 102 The outer surface of the body may move in a direction of gravity, and the liquid metal 101 leaked due to the second liquid metal collection guide 130 may flow into the body parts 110a and 110b. Accordingly, the leaked liquid metal 101 may flow down the outer surfaces of the contact portions 120a and 120b, thereby minimizing a phenomenon in which leakage detection is delayed or leakage is not detected.

The liquid metal 101 introduced through the liquid metal transfer pipe 102 may be moved through the first liquid metal collection guide port 125 described above.

The liquid metal 101 may include, for example, alkali liquid metals such as sodium (Na), lithium (Li), potassium (K), rubidium (Rb), cesium (Cs), and francium (Fr). However, it is not limited thereto.

The leak detectors 140a and 140b may include a pair of metal wires 142a and 142b spaced apart from each other, and optical fibers 144a and 144b positioned between the pair of metal wires 142a and 142b. . The metal wire 142a of the first leakage detection unit DU1 and the metal wire 142b of the second leakage detection unit DU2 are connected to each other, and the optical fiber 144a and the first leakage detection unit DU1 are connected to each other. 2 The optical fibers 144b of the leak detection unit DU2 are connected to each other.

In the case of the general two-wire leak detector 10, since the metal wire 14 is exposed to the outside, when a metallic foreign material is contacted between the two metal wires 14, an erroneous leak signal may be generated. In addition, as the strap for fixing the leak detector 10 repeats expansion and contraction by heat, the fixing strap may come out of the existing installation position and contact the metal wire 14.

On the other hand, in the case of the leak detector 100 according to the embodiment, the body portion 110a is inserted into the body portions 110a and 110b and then the metal wires 142a and 142b and the optical fibers 144a and 144b are inserted. , 110b) Since most of the metal wires 142a, 142b and the optical fibers 144a, 144b are buried inside, unintentional contact with the external environment can be minimized, and an error signal and no leakage signal are generated. This can be minimized. In addition, since the metal wires 142a and 142b and the optical fibers 144a and 144b are inserted through the holes provided in the body parts 110a and 110b, it can be prevented from twisting or crossing each other.

The pair of metal wires 142a and 142b may be energized sensors, and when the metal wires 142a and 142b contact the leaked liquid metal 101, a short circuit signal may be generated, and the short circuit signal may be a signal converter ( signal converter (not shown) to be displayed by a leak indicator (not shown) or to generate an alarm.

In the present specification, the term leakage detection unit DU may be used in terms including both the first leakage detection unit DU1 and the second leakage detection unit DU2, and the body portion of the first leakage detection unit DU1 may be 110a) and the body portion 110 may be used in terms including both the body portion 110b of the second leakage detection unit DU2, and the contact portion 120a and the second leakage of the first leakage detection unit DU1 The contact unit 120 may be used in a term including all of the contact unit 120b of the detection unit DU2, and the metal wire 142a of the first leakage detection unit DU1 and the metal of the second leakage detection unit DU2 The metal wire 142 may be used as a term including all of the wire 142b, and includes both the optical fiber 144a of the first leak detection unit DU1 and the optical fiber 144b of the second leak detection unit DU2. The term optical fiber 144 may be used, and the leakage detection unit 140a of the first leakage detection unit DU1 and the second leakage detection unit DU2 may be used. The term leak detector 140 may be used as a term including all of the leak detector 140b.

Referring to FIG. 6 showing the optical fiber 144 and the metal coating layer 148 according to the embodiment, the optical fiber may be a Raman Distributed Temperature Sensor. The optical fiber 144 is connected to the light generating device 104, and the light generating device 104 irradiates light into the optical fiber 144. At this time, the light may be a laser.

When a laser (incident light) is irradiated to the optical fiber 144, a laser pulse is transmitted through the optical fiber 144. At this time, when external disturbances such as vibration and temperature act on the optical fiber 144, the materials constituting the optical fiber 144 perform molecular motions corresponding thereto, and the laser performs various wavelengths within the optical fiber 144 according to the molecular motion. As it is scattered, most of the projection light continues to travel along the optical fiber 144, but some become reflected light returning in the direction of the incident light.

Scattering due to the molecular motion caused by the material constituting the optical fiber 144 in response to the surrounding thermal energy is called Raman scattering. Among the Raman scattering lights, Stokes Raman scattering light maintains a constant amplitude despite temperature changes, but half -Because the amplitude of the Stokes Raman scattered light varies greatly with temperature, use the Stokes Raman scattered light as a reference and compare it with the amplitude of the anti-Stokes Raman scattered light to easily see the temperature change. , By measuring the return time of the reflected light, it is possible to specify even the leak location of the liquid metal 101 due to the temperature change. Accordingly, when a Raman laser capable of maximizing Raman scattering is used as incident light, a temperature change for each distance along the optical fiber 144 from the light generating device 104 can be confirmed, and leakage of the liquid metal 101 can be detected. .

The leak detector 100 may further include a metal coating layer 148 positioned on the surface of the optical fiber 144. The metal coating layer 148 may include a heat-resistant metal material, and thus the optical fiber 144 can be reliably operated even in a high temperature environment.

Hereinafter, the operation mechanism of the leak detector 100 will be described.

7 is an enlarged view showing a plane of an integrated composite liquid metal leak detector according to an embodiment, and FIG. 8 is an enlarged view of a side surface of an integrated composite liquid metal leak detector according to an embodiment.

7 and 8, the side facing the body portion 110b of the second leakage detection unit DU2 in the body portion 110a of the first leakage detection unit DU1 and the second leakage detection unit DU2 ) In the body portion 110b of the first leakage detection unit DU1 between the body portion 110a and the side facing the fine gap 115 is present.

When the liquid metal 101 leaks from the liquid metal transfer pipe 102, it may be introduced into the integrated composite liquid metal leak detector 100 through the second liquid metal collection guide 130. Most of the metal wire 142 and the optical fiber 144 are buried in the body portion 110, but the liquid metal 101 contacts the metal wire 142 or the optical fiber 144 through the fine gap 115 described above. Can be. The liquid metal 101 may contact the metal wire 142 or the optical fiber 144 due to the capillary phenomenon caused by the fine gap 115 (see FIG. 7). Due to the capillary phenomenon, even if a small amount of the liquid metal 101 is introduced, it can be quickly detected.

In addition, since all of the temperature sensors using the optical fiber 144 as well as the metal wire 142 operated in an energized manner are included, the reliability of the leakage signal can be greatly improved, and the metal wire 142 or the optical fiber 144 ) Even if one of them is disconnected or causes a malfunction, the leakage signal may be generated, and thus the stability of the leak detector 100 may be greatly improved.

On the other hand, even when the leaked liquid metal 101 flows down the outer surfaces of the contact portion 120 and the body portion 110 and is adsorbed to the structure of the lower insulating material 109, the capillary phenomenon of the fine gap 115 By this, the liquid metal 101 is raised and can be detected by contacting the metal wire 142 or the optical fiber 144 (see FIG. 8). Therefore, the detection performance of the leak detector 100 can be greatly improved.

9 is a view showing examples in which the leaked liquid metal is contacted to the integrated composite liquid metal leak detector according to the embodiment.

When the effect of the leak detector 100 is described as an example with reference to FIG. 9, when the liquid metal 101 flows into the leak detector 100 through the second liquid metal collection guide 130, a pair of It may be in contact with both the metal wire 142 and the optical fiber 144 (Fig. 9 (a)), may be in contact with one of the pair of metal wire 142 and the optical fiber 144 (Fig. 9 ( b)), it may be in contact only with the optical fiber 144 (Fig. 9 (c)).

Compared to the case of a general leak detector including only a two-wire metal wire, in the case of the leak detector 100 according to the embodiment, the metal wire 142 and the optical fiber 144 using different sensing principles are all included, thereby In all three cases, a leakage signal can be generated. In addition, since the metal wire 142 and the optical fiber 144 simultaneously detect a leakage signal at the same location, if the metal wire 142 and the optical fiber 144 do not simultaneously generate a leakage signal, it is determined whether there is a malfunction or malfunction. It can be monitored so that it can proactively respond to system errors, thereby stably maintaining and maintaining the leak detector 100 system. In addition, even if one of the metal wire 142 and the optical fiber 144 loses function, the other one can still perform leak detection, so that stability can be greatly improved.

Hereinafter, a fixing method for the liquid metal transfer pipe 102 of the leak detector 100 will be described with reference to the drawings.

10 is a view schematically showing an embodiment in which an integrated composite liquid metal leak detector according to an embodiment is fixed to a liquid metal transfer pipe.

When the liquid metal transfer pipe 102 is in the form of a horizontal pipe, the integrated composite liquid metal leak detector 100 may be fixed to the liquid metal transfer pipe 102 by an annular fixing strap 160. At this time, since the fixing strap 160 surrounds the outer surface of the body portion 110, the leak detection unit 140 is insulated from the external environment, so even when the fixing strap 160 deviates from the fixed position Contact with the sensing unit 140 may not occur. Therefore, detection reliability and stability for the leaking liquid metal 101 can be improved.

In addition, although the leak detection unit 140 is isolated from the external environment, the leakage of the liquid metal 101 is rapidly and quickly performed by using the capillary phenomenon of the second liquid metal collection induction port 130 and the fine gap 115 described above. You can judge accurately.

11 is a view schematically showing an embodiment in which an integrated composite liquid metal leak detector according to an embodiment is fixed to a liquid metal transfer pipe.

Referring to FIG. 11, when the liquid metal conveying pipe 102 is in the form of a large-diameter vertical pipe, a leak detector under the stress concentrating portion 174 where leakage of liquid metal is expected due to a welding portion 172 or a stress concentration requiring leakage detection 100 may be installed in an annular shape, and may be installed in a straight line along the pipe 102 when extended. At this time, the portion installed in an annular shape can be fixed to the pipe 102 using the fixing strap 160, and the portion installed in a straight shape can be fixed in close contact through spot welding.

12 is a view schematically showing an embodiment in which an integrated composite liquid metal leak detector according to an embodiment is fixed to a liquid metal transfer pipe.

The integrated composite liquid metal leak detector 100 may be installed in a spiral. At this time, the leak detector 100 may be fixed to the pipe 102 by a plurality of fixing straps 160.

In addition, the integrated composite liquid metal leak detector 100 can be easily installed according to various designs regardless of the diameter of the pipe 102. In addition, the installation efficiency can be greatly improved because it can be freely installed in a single construction where leakage of the liquid metal 101 is expected. In addition, since the metal wires 142 and the optical fibers 144 that detect leakage on different principles can be integrally installed, detection performance may be improved, and detection stability and reliability may be greatly improved.

In summary, the liquid metal 101 leaked through the second liquid metal collection induction port 130 can be easily introduced into the leak detector 100. A small amount of leakage can also be quickly detected by using the capillary phenomenon of the fine gap 115, and the metallic wire 142 and the optical fiber 144 are buried in the body portion 110 made of ceramic material to provide a metallic foreign substance or a fixing strap 160 ) To minimize the possibility of malfunction.

In addition, by using the energized metal wire 142 and the optical fiber 144 sensor that detects temperature changes, it is possible to improve the reliability of the leak detection signal through mutual complementary sensing by detecting whether the liquid metal 101 is leaked in double. In addition, when one of the metal wire 142 and the optical fiber 144 becomes a function error or malfunction, the other can continuously perform the leak detection function, thereby improving the stability and reliability of the leak detector 100.

Although the preferred embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements of those skilled in the art using the basic concept of the present invention defined in the following claims are also provided. It belongs to the scope of rights.

100: all-in-one composite liquid metal leak detector
DU: leak detection unit 101: liquid metal
102: liquid metal transfer pipe 104: light generating device
110: body 115: fine gap
120: contact portion 125: first liquid metal collection guide
130: second liquid metal collection induction port 140: leak detection unit
142: metal wire 144: optical fiber
160: fixing strap 172: weld
174: stress concentration

Claims (12)

A first leakage detection unit and a second leakage detection unit that are adjacent to each other in a first direction among a first direction, a second direction, and a third direction perpendicular to each other,
Each of the first leakage detection unit and the second leakage detection unit,
A body portion having a polygonal shape in cross section parallel to a plane perpendicular to the third direction,
A leak detector that is embedded in the body and detects leaked liquid metal, and
A pair of contact portions located on both sides of the body portion, spaced apart in the second direction, and extended in the third direction to contact the liquid metal transfer pipe
Including,
A first liquid metal collection guide is located between the pair of contacts,
A second liquid metal collection induction port is located between the contact portion of the first leak detection unit and the contact portion of the second leak detection unit in the first direction.
Integral composite liquid metal leak detector.
In claim 1,
Each of the first leakage detection unit and the second leakage detection unit is an integrated composite liquid metal leak detector having a concave cross section parallel to a plane perpendicular to the first direction.
In claim 1,
Fine between the side facing the body portion of the second leak detection unit in the body portion of the first leak detection unit and the side facing the body portion of the first leak detection unit in the body portion of the second leakage detection unit Integral composite liquid metal leak detector with gap.
In claim 1,
The leak detector is an integrated composite liquid metal leak detector including a pair of metal wires spaced apart from each other and an optical fiber positioned between the pair of metal wires.
In claim 4,
All-in-one composite liquid in which the metal wire of the first leakage detection unit and the metal wire of the second leakage detection unit are connected to each other, and the optical fiber of the first leakage detection unit and the optical fiber of the second leakage detection unit are connected to each other. Metal leak detector.
In claim 4,
An integrated composite liquid metal leak detector that generates a short circuit signal when the metal wire contacts the leaked liquid metal.
In claim 4,
The optical fiber is an integrated complex liquid metal leak detector, which is a Raman Distributed Temperature Sensor.
In claim 4,
An integrated composite liquid metal leak detector further comprising a metal coating layer located on the surface of the optical fiber.
In claim 1,
An integrated composite liquid metal leak detector having an octagonal shape in cross section parallel to a plane perpendicular to the third direction in the body portion.
In claim 1,
Each of the body portion and the contact portion is an integrated composite liquid metal leak detector comprising a ceramic (ceramic) material.
Liquid metal conveying piping, including liquid metal
An integrated composite liquid metal leak detector fixed to a part of the outer surface of the liquid metal transfer pipe, and
Fixing strap securing the integral composite liquid metal leak detector to the liquid metal transfer pipe
Including,
The integrated composite liquid metal leak detector,
A first leakage detection unit and a second leakage detection unit that are adjacent to each other in a first direction among a first direction, a second direction, and a third direction perpendicular to each other,
Each of the first leak detection unit and the second leak detection unit,
A body portion having a polygonal shape in cross section parallel to a plane perpendicular to the third direction,
A leak detector that is embedded in the body and detects leaked liquid metal, and
A pair of contact portions located on both sides of the body portion, spaced apart in the second direction, and extended in the third direction to contact the liquid metal transfer pipe
Including,
A first liquid metal collection guide is located between the pair of contacts,
A second liquid metal collection induction port is located between the contact portion of the first leak detection unit and the contact portion of the second leak detection unit in the first direction.
Liquid metal leak detection system.
In claim 11,
A liquid metal leak detection system in which the fixing strap surrounds the outer surface of the body portion and the leak detection portion is isolated from the outside.

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