JP2017134002A - Disaster prevention system with thermocouple distributed sensor and thermocouple distributed sensor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable assembly of a thermocouple wire in a factory by connecting a thermocouple portion to a connecting wire and making it rollable as a heat sensing wire in which a return wire is assembled in parallel with the thermocouple wire. A thermocouple distributed sensor and a disaster prevention system equipped with a thermocouple distributed sensor that can reduce the burden of work on the construction site and eliminate assembly errors. obtain.
SOLUTION: At least a pair of thermocouples in which two kinds of metal a and metal b are joined to each other are defined as metal b, and at least the pair of thermocouples has a length of a thermocouple unit or less and is a flexible conductor. The thermocouple portion 5 connected at 9 is provided so that the thermocouple portion 5 can be bent at the portion of the conductive wire 9.
[Selection] Figure 1

Description

  The present invention relates to a thermocouple type distributed sensor having a thermocouple unit formed by connecting a plurality of thermocouples joined with two different metals in series, and a disaster prevention system including a thermocouple type distributed sensor.

Conventionally, as a thermocouple-type distributed sensor that detects fires in buildings such as houses and factories, connecting wires are connected to thermocouples that are made by joining two or more different thermocouples in series. There is a thermocouple type distributed sensor comprising a detector connected with a thermocouple wire (see, for example, Patent Document 1). The thermocouple of the thermocouple type distributed sensor is formed by a joint that acts as a low temperature point with a large heat capacity and a joint that acts as a high temperature point with a small heat capacity and is easily heated. It generates a thermoelectromotive force by producing a temperature difference, and senses the occurrence of a fire.
The thermocouple-type distributed sensor described in Patent Document 1 is constructed by connecting a plurality of thermocouple units in series in an area where a fire is desired to be detected. The detector that detects the thermoelectromotive force sends a fire signal to the receiver, and the receiver gives the necessary alarm and display.

Japanese Utility Model Publication No. 54-86083

This type of thermocouple wire described in Patent Document 1 is configured by joining a plurality of thermocouples in series, and generally has about 10 pairs of thermocouples connected in series in order to improve thermal accuracy. The length is 40 cm to 50 cm.
Moreover, the metal constituting the thermocouple is generally made of a hard metal such as iron and constantan. Therefore, the thermocouple portions connected in series are not flexible and have a rod shape that is difficult to bend.

  For this reason, shipment as a parallel line in which the thermocouple part is connected to the connecting wire and the return line is assembled in parallel with the thermocouple line, the parallel line cannot be rolled due to the presence of the bar-shaped thermocouple part that is difficult to bend. Therefore, it cannot be shipped in the state of parallel lines, and the connection wires are assembled to the thermocouple part at the construction site, and the thermocouple lines are assembled into parallel lines. For this reason, there is a problem that not only the work on the construction site is increased and the work becomes complicated, but also the workability is poor.

  Also, since the assembly of thermocouple wires at the construction site is assembled by the operator, there is a variation in the assembly, the resistance value does not become constant due to this variation, and there is a risk of making an assembly error or a problem of assembly error. There was a problem that there was.

  The object of the present invention is to enable assembly of a thermocouple wire in a factory by connecting a thermocouple portion to a connecting wire and enabling roll winding as a parallel wire in which a return wire is assembled in parallel with the thermocouple wire. Disaster prevention equipped with thermocouple distributed sensor and thermocouple distributed sensor that can improve the quality control and stability of the paired wires, reduce the burden of work on the construction site, and eliminate assembly errors To provide a system.

  In order to achieve the above object, the invention according to claim 1 is characterized in that a plurality of thermocouples are formed by using both ends of at least a pair of thermocouples obtained by joining two kinds of metal a and metal b as metal b. It is characterized in that it has a thermocouple portion that is shorter than the thermocouple and connected by a flexible conductive wire.

  According to the first aspect of the present invention, a rod-shaped thermocouple portion formed by connecting a plurality of thermocouples in series can be bent at the portion of the conducting wire, and the thermocouple portion is connected to the connecting wire and assembled with the thermocouple wire. By doing so, the thermocouple wire can be rolled, and further rolled as a parallel line in which a return line is assembled in parallel with the thermocouple wire. Moreover, the performance equivalent to the conventional rod-shaped thermocouple part can be acquired by making the both ends of the said thermocouple into the metal b.

  The invention according to claim 2 is the thermocouple according to claim 1, wherein the metal a is iron, the metal b is constantan, and the conducting wire is a copper wire. It is characterized by.

  According to the second aspect of the present invention, the copper wire is flexible, and the thermocouple portion connecting the plurality of thermocouples in series can be easily bent at the portion of the conducting wire. Further, since the metal a constituting the thermocouple is iron and the metal b is constantan, the thermoelectromotive force can be increased, and since the metal b is constantan, the thermoelectromotive force between the constantan and copper. Therefore, the flexibility of the conductive wire and the thermoelectromotive force of the thermocouple portion, that is, the fire detection capability can be compatible.

  According to a third aspect of the present invention, the thermocouple unit according to any one of the first or second aspects senses heat and generates a thermoelectromotive force, and the thermocouple unit is connected to the connection wire. In the detector that converts the thermoelectromotive force generated by the thermocouple portion into a fire signal and sends a fire signal to the receiver, the thermocouple wire is a wire in which the thermocouple portions are connected in series, and the thermocouple wire is a thermocouple The thermocouple wire and the return wire are connected to the detector, and the thermocouple wire and the return wire are connected at the opposite end of the detector. It is characterized by being.

  According to a third aspect of the present invention, the thermocouple wire is integrally formed in parallel with the return wire not connected to the thermocouple portion, and is connected and looped at the opposite end of the detector. The polarity of the noise generated in the wire and the return wire can be reversed and canceled, the voltage of the thermoelectromotive force generated by the thermocouple of the thermocouple portion can be reliably detected, and the thermocouple wire Since the return line is integrated, workability on site is also good.

  Invention of Claim 4 is a disaster prevention system, Comprising: The said thermocouple type | mold distributed type sensor and the said receiver of any one of the said Claim 1 thru | or 3 are provided, An alarm generating means for receiving a fire signal from the detector and issuing an alarm and an informing means for notifying the outside of the fire are provided.

  According to the fourth aspect of the present invention, it is possible to promptly issue a fire alarm by a fire signal from the thermocouple distributed sensor or transmitter, and to notify the outside, for example, a person concerned or a fire engine. .

According to the thermocouple-type distributed sensor according to the present invention, a thermocouple portion formed by connecting at least one thermocouple can be bent at a portion of a conducting wire, and the thermocouple portion is connected to a connecting wire and assembled. By using a pair of wires, the thermocouple wire can be rolled, enabling assembly of the thermocouple distributed sensor at the factory, and high quality control and stability of the thermocouple distributed sensor. In addition to improving the performance, it is possible to reduce the burden of work on the construction site and eliminate assembly errors.
Furthermore, fires in a wide range of buildings can be monitored by thermocouple-type distributed sensors, and in the event of a fire, notifications can be made promptly to related parties or fire engines.

It is a partially omitted schematic configuration explanatory view showing an example of an embodiment of a thermocouple type distributed sensor according to the present invention. It is an AA line expanded sectional view of FIG. FIG. 2 is a partially omitted enlarged cross-sectional explanatory diagram illustrating an example of a thermocouple portion of the thermocouple distributed sensor shown in FIG. 1. It is a schematic block diagram which shows an example of the disaster prevention system which uses the thermocouple distribution type sensor shown in FIG.

Hereinafter, an example for carrying out the thermocouple distributed sensor according to the present invention will be described in detail with reference to FIGS.
FIG. 1 is a schematic configuration diagram showing an example of an embodiment of a thermocouple type distributed sensor of this example, FIG. 2 is an enlarged cross-sectional view taken along line AA of FIG. 1, and FIG. 3 is a thermocouple type shown in FIG. It is a partially omitted enlarged cross-sectional explanatory view showing an example of a thermocouple portion of the distributed sensor.

The thermocouple distributed sensor 1 of this example includes a thermocouple wire 7 and a detector 13 to which the thermocouple wire 7 is connected.
The thermocouple wire 7 is configured by connecting and assembling a thermocouple portion 5 formed by connecting a plurality of thermocouples obtained by joining two different types of metals a and b to each other in series. In the figure, metal a is represented as 3, and metal b is represented as 2.
Metal a and metal b constituting the thermocouple are connected by a conductive wire 9 which is flexible and has high conductivity.

  More specifically, the two different types of metal a and metal b constituting the thermocouple of this example are formed in a pipe shape in which the opposite end side is a solid part and the other end side is open, and the solid part of the metal a and the metal b The solid parts are joined together to form a thermocouple, the open end of metal a is joined to the open end of metal b in this thermocouple, and the solid part of metal b is joined to the solid part of metal a Then, the following thermocouple is constructed, the open end of the metal a is joined to the open end of the metal b in this thermocouple, and the hollow pipe-like metal b is joined to the solid part of the metal a to connect the wires. 2a, and a hollow pipe-shaped metal b is joined to the opening end of the metal a at the opposite end to form a thermocouple unit 4 as a conductor connection 2b, and the thermocouple unit 4 is connected in series with the conductor 9. 4 are connected to each other to form a thermocouple unit 5, and a connecting wire 6 is connected to both ends of the thermocouple unit to connect the thermocouple unit 5 in series. And the number connected constitute a thermocouple wires 7, constituting the thermocouple distribution type sensor by parallel lines together with thermocouple wire 7 and the return line 8. (See FIG. 1).

In the thermocouple portion 5 configured as described above, the joint portion between the solid portion of the metal a and the solid portion of the metal b becomes the low temperature point X, and the opening end of the metal a and the opening end of the metal b are The joint becomes the high temperature point Y.
In the thermocouple unit 5 of this example, when the metal a is a and the metal b is b, the thermocouple unit 4 is bababab. When the conductive wire 9 is u, when connected in the following order, it becomes bababab-u-bababa-u-bababa-u-bababa and becomes the thermocouple unit 5. A connecting wire 6 is connected to both ends to form a thermocouple wire 7. In this example, bababab is one thermocouple unit 4 constituting the thermocouple portion. Moreover, it is preferable that the metal b used as the connection of the metal b and the conducting wire 9 and the connection between the metal b and the connection wire 6 is a hollow pipe shape and does not have a solid part. By setting it as this structure, the negative thermoelectromotive force between the metal b and the conducting wire 9 and the negative thermoelectromotive force between the metal b and the connecting wire do not affect the positive thermoelectromotive force of the thermocouple unit. Can be made smaller.

  In addition, in the connection between the metal b and the conductive wire 9 and the connection between the metal b and the connection electric wire 6, the length of the insertion portion of the conductive wire 9 or the connection electric wire 6 inserted with respect to the entire length of the metal b is short. The length of the insertion portion is preferably 4/5 or less, and more preferably 2/3 or less with respect to the entire length of the metal b. Thereby, the negative thermoelectromotive force between the metal b and the conducting wire 9 or the connecting wire 6 can be further reduced. The length of the insertion portion is preferably 1/3 or more with respect to the entire length of the metal b. Thereby, the metal b and the conducting wire 9 or the connecting wire 6 can be connected with high reliability.

  In the present example, the plurality of thermocouples constituting the thermocouple unit 5 are connected by the conductive wires 9 and are intermittently arranged continuously. However, the thermocouple unit 4 constituting the thermocouple unit 5 is particularly limited. Instead, for example, not only bababab, but babab, babababa, or babababa may be used. That is, both ends of the thermocouple unit 4 may be connected to the conducting wire 9 or the connecting wire 6 by forming a hollow pipe-like b. As long as the thermocouple units 4 satisfy the characteristics of the thermocouple unit 5 are connected, not only the same thermocouple unit 4 but also different thermocouple units 4 are connected to form the thermocouple unit 5. May be.

  Further, the joining of the metal a and the metal b is performed by welding, and the connection between the conductor 9 and the metal a and the metal b is performed by means such as pressure bonding or welding.

In addition, in the case of two different types of metals a and b constituting the thermocouple, in this example, one metal a is formed of iron and the other metal b is formed of constantan. It is connected.
The conductive wire 9 is not particularly limited as long as it is a flexible and highly conductive metal and has a small thermoelectromotive force with the metal b. In this example, a copper wire is used. Moreover, the length of the conducting wire 9 is such a length that the thermocouple portion 5 can be bent to a curvature that enables roll winding. When a metal having a low thermoelectromotive force with the metal a and being flexible and having high conductivity is used as the conducting wire, both ends of the thermocouple may be connected to the metal a and the conducting wire may be connected to the metal a.

Further, in this example, the thermocouple wire 7 connecting the thermocouple portion 5 is integrally formed in parallel with the return wire 8 not connecting the thermocouple portion 5, and the thermocouple wire 7 and the return wire 8 are connected to the detector 13. The thermocouple wire 7 and the return wire 8 are connected and looped at the opposite end of the detector 13. Further, a tension member 10 is integrally provided along the thermocouple wire 7 and the return wire 8 (see FIGS. 1 and 2).
In this example, the thermocouple wire 7, the return wire 8, and the tension member 10 are integrally covered with a synthetic resin coating 11 to form parallel wires 12.

  According to the thermocouple type distributed sensor 1 of this example configured as described above, one metal b of the metal a and metal b constituting the thermocouple is a flexible and highly conductive wire. 9, the thermocouple portion 5 formed by connecting a plurality of thermocouples in series can be bent at the portion of the conductive wire 9, and the thermocouple portion 5 is connected to the connecting wire 6 and parallel to the assembled thermocouple wire 7. A parallel line with a return line can be rolled.

  In this example, among the plurality of thermocouples constituting the thermocouple unit 5, the thermocouple for connecting one metal b by the conductive wire 9 is disposed intermittently continuously. Can be bent with a small curvature.

In this example, since two different types of metals a and b constituting the thermocouple are iron and constantan, the thermoelectromotive force is large and can be sensed with high accuracy.
Moreover, since the metal b is a constantan and the conducting wire 9 and the connecting wire to be connected are copper wires, the negative thermoelectromotive force between the constantan and copper is small, and the two different types of metals a constituting the thermocouple Since it is small with respect to the positive thermoelectromotive force generated between iron and constantan forming the metal b, the influence on the measurement sensitivity is small.

In this example, since the thermocouple wire 7 and the return wire 8 are integrally formed in parallel, noise generated in the thermocouple wire 7 can be canceled by the return wire 8 and is generated by the thermocouple of the thermocouple portion 5. It is possible to reliably detect the voltage of the thermoelectromotive force.
In addition, since the tension member 10 is integrally provided along the thermocouple wire 7 and the return wire 8, the thermocouple wire 7 is laid on the ceiling or wall without giving the thermocouple wire 7 by the tension member 10. It can be done easily on site.

FIG. 4 is a schematic configuration diagram showing an example of a disaster prevention system using the thermocouple distributed sensor 1 configured as described above.
The disaster prevention system of this example includes a thermocouple distributed sensor 1, alarm generating means 14 for receiving a fire signal from a detector 13 provided in the thermocouple distributed sensor 1, and a fire. It is provided with a receiver 16 having an informing means 15 for informing the outside. The receiver 16 is installed in the disaster prevention center or central management room of the building. Here, the detector 13 may be for P-type or R-type. The receiver 16 may also be a P-type receiver or an R-type receiver.

According to the disaster prevention system configured as described above, in the event of a fire, the thermocouple unit 5 senses the heat of the fire from the difference in heat capacity between the high temperature point and the low temperature point due to the high temperature air flow accompanying the occurrence of the fire and generates the thermoelectromotive force. The thermoelectromotive force generated by the thermocouple unit 5 is sensed by the detector 13 connected to the thermocouple wire 7 and the return wire 8, and the detector 13 converts the thermoelectromotive force into a fire signal and sends it to the receiver 16. Send. The receiver 16 that has received the fire signal issues a warning by the alarm generation means 14 for all sounds and the district display, and notifies the outside of the person concerned or the fire fighting organization by a notification means 15 such as ringing of the district acoustic device.
Thereby, a fire in a wide range of buildings can be monitored by the thermocouple type distributed sensor 1, and when a fire occurs, the receiver 16 can promptly notify relevant persons or fire fighting organizations.

1 Thermocouple type distributed sensor 2 Metal b
2a, 2b metal b
3 Metal a
4 Thermocouple unit 5 Thermocouple unit 6 Connection wire 7 Thermocouple wire 8 Return wire 9 Conductor wire 10 Tension member 11 Cover 12 Parallel wire 13 Detector 14 Alarm generating means 15 Notification means 16 Receiver X High temperature point Y Low temperature point

Claims (4)

  Thermoelectrics in which at least a pair of thermocouples obtained by joining two kinds of metal a and metal b to each other are used as metal b, and a plurality of the thermocouples are connected to each other by a flexible conductor having a length equal to or shorter than the thermocouple. A thermocouple type distributed sensor comprising a pair.   2. The thermocouple distributed sensor according to claim 1, wherein the thermocouple unit is a thermocouple unit in which the metal a is iron, the metal b is constantan, and the conductive wire is a copper wire. .   The thermocouple unit senses heat and generates a thermoelectromotive force, and the thermocouple unit is connected to the connecting wire and converts the thermoelectromotive force generated by the thermocouple unit into a fire signal and sends a fire signal to the receiver. The thermocouple wire is an electric wire in which thermocouple portions are connected in series, and the thermocouple wire is integrally formed in parallel with a return wire that does not connect the thermocouple portion, and the thermocouple wire and the thermocouple wire are connected to the detector. The thermocouple distributed type according to claim 1, wherein a return line is connected, and the thermocouple line and the return line are connected at an opposite end of the detector. sensor.   A disaster prevention system comprising the thermocouple type distributed sensor and the receiver according to any one of claims 1 to 3, wherein the receiver receives a fire signal from the detector. A disaster prevention system comprising: an alarm generating means for issuing an alarm; and an informing means for informing a fire to the outside.

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