JP5121328B2 - Abnormal overheat indicator - Google Patents

Description

  The present invention relates to an abnormal overheat display device arranged at a connection portion connecting two overhead electric wires.

  Conventionally, as means for monitoring abnormal overheating in a compression connecting pipe as a connecting portion for connecting two overhead electric wires, there have been periodic temperature measurement with an infrared radiation thermometer, utilization of a temperature indicating tape, and the like.

  However, when abnormal overheating of the crimping connection tube is monitored by periodic temperature measurement with an infrared radiation thermometer, the measurement work is not easy because the overhead wire is at a high place, which may burden the operator. . Moreover, when measuring the temperature in a plurality of compression connecting pipes, it is necessary to carry an infrared radiation thermometer, and this may cause a burden on the operator.

  Also, when monitoring abnormal overheating of crimped connection pipes with a temperature indicating tape, the temperature indicating tape deteriorates relatively quickly, so it needs to be replaced (replaced) regularly, which may impose a burden on maintenance. there were.

On the other hand, a method for monitoring abnormal overheating of the compression connecting pipe by arranging a shape memory alloy around the outer circumference of the compression connecting pipe has been proposed (see, for example, Patent Document 1). In other words, when the compression connecting pipe is abnormally overheated, the shape memory alloy wound around the outer periphery of the compression connecting pipe is deformed so as to shrink, so that the abnormal overheating of the compression connecting pipe can be visually observed without directly measuring the temperature. It can be easily monitored.
JP 2001-167860 A

  However, in the invention disclosed in Patent Document 1, the shape change of the shape memory alloy may be difficult to recognize from the outside. In particular, since the compression connecting pipe is arranged at a high position from the ground, the shape change of the shape memory alloy may not be confirmed without using binoculars, a telescope, or the like or ascending to a steel tower or the like.

  The present invention provides an abnormal overheat display device having a light emitting unit, wherein the light emitting unit continuously emits light from the time when abnormal overheating occurs at a connection portion connecting two overhead wires. Objective.

  (1) An abnormal overheat display device disposed at a connection portion connecting two overhead wires, and an annular magnetic core formed in an annular shape integrally or by combining a plurality of members, and an annular direction in the annular magnetic core A winding wound spirally around all or a part of the outer surface, a power supply unit electrically connected to the winding, and light emitted by the power from the power supply unit and exposed to the outside And a switch that can be switched between a state in which power from the power supply unit is output to the light emitting unit and a state in which the power is not output. The switch has a temperature of the connection unit that is equal to or higher than a predetermined temperature. In this case, the power from the power supply unit is switched from a state in which the power is not output to the light emitting unit to a state in which the power is output, and the temperature of the connection unit is decreased from a temperature equal to or higher than the predetermined temperature to a temperature lower than the predetermined temperature. Abnormal overheating display device to maintain a state for the output in case.

  Here, the term “exposed outside” means that the light emitting part is not necessarily disposed on the outermost surface as long as the light emitting part is disposed so as to be visible from the outside. For example, a light-transmissive cover member, a plate member having a plurality of openings, or a net-like member may be disposed on the outer space side of the light emitting unit.

  (2) The switch has two contact points that are separated from each other and are not electrically connected to each other, and are in contact with each other and are electrically connected. When the temperature is equal to or higher than the predetermined temperature, they are brought into contact with each other and are electrically connected, and the temperature of the connecting portion is decreased from the temperature equal to or higher than the predetermined temperature to a temperature lower than the predetermined temperature. The abnormal overheat display device according to (1), in which the state of being in contact with each other is maintained and the state of being electrically connected is maintained.

  (3) At least a part of the switch is made of a shape memory alloy that deforms according to temperature, and the two contact points correspond to each other when the switch is deformed when the connection portion becomes the predetermined temperature or higher. The switch is kept in contact with each other by maintaining the deformed state even when the temperature of the connecting portion decreases from a temperature equal to or higher than the predetermined temperature to a temperature lower than the predetermined temperature. The abnormal overheat display device according to (2).

  (4) A housing that is externally fitted to the two overhead electric wires, and the housing includes a first housing and a second housing that is disposed to face the first housing with the connection portion interposed therebetween. The annular magnetic core is disposed in the first housing, and the winding is spirally wound around the outer surface; the annular core is disposed in the second housing; and the winding is disposed on the outer surface. The abnormal overheat display device according to any one of (1) to (3), including a second semi-annular magnetic core in which the wire is not spirally wound.

  (5) Further comprising another annular magnetic core, the annular magnetic core is disposed at one end in the longitudinal direction of the housing, and is disposed at an outer periphery of one of the two overhead electric wires, The other annular magnetic core is disposed at the other end in the longitudinal direction of the housing and is disposed at the outer periphery of the other overhead electric wire, and is disposed within the second housing, and the winding is spirally formed on the outer surface. The abnormal overheat display device according to (4), which is configured by a wound third semi-annular magnetic core and a fourth semi-annular magnetic core that is disposed in the first housing and does not spirally wind around the outer surface. .

  (6) The abnormal overheat display device according to any one of (1) to (5), wherein the light emitting unit is an LED light emitting unit.

  According to the present invention, there is provided an abnormal overheat display device having a light emitting unit, wherein the abnormal light emitting unit continuously emits light from the time when abnormal overheating occurs at a connection portion connecting two overhead wires. can do.

The best mode for carrying out the present invention will be described below with reference to the drawings.
The abnormal overheat display device 1 in this embodiment will be described with reference to FIGS. FIG. 1 is a perspective view of the abnormal overheat display device 1 attached to the compression connecting pipe 100. FIG. 2 shows a cross-sectional view of the abnormal overheat display device 1 attached to the compression connecting pipe 100. FIG. 3 is a perspective view of the compression connecting pipe 100 that connects the first electric wire 910 and the second electric wire 920. FIG. 4 is a diagram illustrating the internal structure when the abnormal overheat display device 1 is arranged in the compression connecting pipe 100. FIG. 5 is a block diagram illustrating the internal structure of the abnormal overheat display device 1.

  As shown in FIGS. 1 to 3, the abnormal overheat display device 1 is disposed so as to cover a compression connecting pipe 100 as a connecting portion that connects the first electric wire 910 and the second electric wire 920. As shown in FIG. 1, in the abnormal overheat display device 1 arranged so as to cover the compression connecting pipe 100, the light emitting part 5A and the light emitting part 5B are exposed to the outside.

  As shown in FIGS. 1 to 5, the abnormal overheat display device 1 includes an annular magnetic core 3, 4, windings 6, 7 spirally wound around the outer surfaces of the annular magnetic cores 3, 4, and a winding 6. , 7 are electrically connected to each of the power supply units 8, 9; the light emitting units 5A, 5B are disposed by being exposed to the power and exposed to the outside; and the power supply unit 8, 9 includes switches 10 and 11 that can be switched between a state in which power from each of the light-emitting units 5A and 5B is output / a state in which the light-emitting units 5A and 5B are not output. The annular magnetic cores 3 and 4, the windings 6 and 7, the power supply units 8 and 9, and the switches 10 and 11 are accommodated in the housing 50, and the light emitting units 5 </ b> A and 5 </ b> B are along the outer peripheral surface of the housing 50. Are arranged as follows.

  As shown in FIGS. 1 and 2, the outer shape of the abnormal overheat display device 1 is formed by a housing 50 that is externally fitted to the first electric wire 910 and the second electric wire 920. The housing 50 is a cylindrical member having a hollow portion 950. The housing 50 includes a first housing 51 and a second housing 52. Specifically, the housing 50 includes a first housing 51 and a second housing 52 disposed so as to face the first housing 51 with the compression connecting pipe 100 interposed therebetween.

  The first housing 51 and the second housing 52 have substantially the same shape. Specifically, the first housing 51 and the second housing 52 have a semi-cylindrical shape that divides the housing 50 into halves of a circle in the cylinder. The first housing 51 and the second housing 52 arranged so as to face each other are positioned by a bolt 65 and a predetermined nut 66 inserted through a hole portion 70 formed in the flange portions 63 and 64 extending from the first housing 51 and the second housing 52, respectively. Fixed.

  Here, in the first housing 51 and the second housing 52, the same components and the like are arranged, respectively. Specifically, the first housing 51 includes a semicircular magnetic core 3 </ b> A (described later) constituting the annular magnetic core 3, a semicircular magnetic core 4 </ b> B (described later) configuring the annular magnetic core 4, a winding 6, a power supply unit 8, The switch 10 is housed and disposed. In addition, the light emitting portion 5 </ b> A is disposed on the outer surface of the first housing 51 so as to be exposed to the outside. Similarly, in the second housing 52, a semi-annular magnetic core 3 </ b> B described later constituting the annular magnetic core 3, a semi-annular magnetic core 4 </ b> A described later constituting the annular magnetic core 4, the winding 7, the power supply unit 9, and the switch 11. And are disposed. Further, the light emitting portion 5B is disposed on the outer surface of the second housing 52 so as to be exposed to the outside.

  As shown in FIGS. 2 and 4, the housing 50 is disposed such that the inner surface of the housing 50 abuts against the compression connecting pipe 100. That is, the inner diameter of the hollow portion 950 formed in the housing 50 is formed so as to be approximately the same as the outer diameter of the compression connecting pipe 100 in a state where the abnormal overheat display device 1 is mounted. Specifically, the elastic members 51B and 52B are disposed between the hollow portion 950 and the case portions 51A and 52A constituting the outer shell of the housing 50, and the inner diameter of the hollow portion 950 is made larger than the outer diameter of the compression connecting pipe 100. Is also formed to be smaller. With this configuration, the elastic members 51B and 52B can be deformed in a state where they have elasticity in the radial direction in the cross section of the housing 50, so that the whole or a part of the inner surface of the hollow portion 950 is compressed connection pipe 950. Abuts against the outer surface of

  As shown in FIGS. 1 and 5, the abnormal overheat display device 1 houses a first annular magnetic core 3 and a second annular magnetic core 4 at both ends in the longitudinal direction X, respectively. Each of the first annular magnetic core 3 and the second annular magnetic core 4 is formed in an annular shape and is disposed around the first electric wire 910 and the second electric wire 920. Specifically, as shown in FIG. 3, the abnormal overheat display device 1 is in a state where the first electric wire 910 and the second electric wire 920 are inserted into the hollow portions of the first annular magnetic core 3 and the second annular magnetic core 4, respectively. Be placed.

  As shown in FIGS. 3 and 5, the first annular magnetic core 3 is composed of a semi-annular magnetic core 3A and a semi-annular magnetic core 3B. The semi-annular magnetic core 3A is provided with a first winding 6 formed by winding a conducting wire around the outer surface of the semi-annular magnetic core 3A. The semi-annular magnetic core 3 </ b> A is disposed in the first housing 51, and the semi-annular magnetic core 3 </ b> B is disposed in the second housing 52.

  Similarly, the second annular magnetic core 4 includes a semi-annular magnetic core 4A and a semi-annular magnetic core 4B. The semi-annular magnetic core 4A is provided with a second winding 7 formed by winding a conducting wire around the outer surface of the semi-annular magnetic core 4B. The semi-annular magnetic core 4 </ b> A is disposed in the second housing 52, contrary to the case of the first annular magnetic core 3, and the semi-annular magnetic core 4 </ b> B is disposed in the first housing 51.

  As shown in FIG. 5, the abnormal overheat display device 1 includes a power supply unit electrically connected via a wiring 16 and a first winding 6 disposed so as to be wound around the outer surface of the first annular magnetic core 3. 8 is provided. Further, the abnormal overheat display device 1 includes a power supply unit 9 electrically connected via a wiring 17 and a second winding 7 arranged so as to be wound around the outer surface of the second annular magnetic core 4.

  Each of the power supply unit 8 and the power supply unit 9 includes a rectifier circuit and a constant voltage circuit (not shown). Each of the power supply unit 8 and the power supply unit 9 can obtain predetermined power from currents generated in the winding 6 and the winding 7, respectively. The power output from each of the power supply unit 8 and the power supply unit 9 causes the LED light emitting units 5a and 5b constituting the light emitting unit 5A and the light emitting unit 5B to emit light.

  As shown in FIG. 1, the light emitting part 5 </ b> A and the light emitting part 5 </ b> B are disposed on the outer surface of the housing 50. Specifically, the light emitting part 5 </ b> A and the light emitting part 5 </ b> B are formed over substantially the entire outer peripheral surface at the central part in the longitudinal direction X of the housing 50.

  Each of the light emitting unit 5A and the light emitting unit B includes a plurality of LED light emitting units 5a and LED light emitting units 5b. Each of the plurality of LED light emitting units 5 a and LED light emitting units 5 b emits light by power from the power supply unit 8 and the power supply unit 9. In other words, when power is output from each of the power supply unit 8 and the power supply unit 9, each of the plurality of LED light emitting units 5a and LED light emitting units 5b emits light.

  As shown in FIG. 5, a switch 10 and a switch 11 are disposed between the power supply unit 8 and the power supply unit 9 and the light emitting unit 5A and the light emitting unit 5B, respectively. The resistor R1 is disposed in parallel with the switch 10 and the light emitting unit 5A, and the resistor R2 is disposed in parallel with the switch 11 and the light emitting unit 5B. Specifically, the resistor R1 is disposed between a branch point 20a located between the power supply unit 8 and the switch 10 and a branch point 20b located between the light emitting unit 5A and the first winding 6. The The resistor R2 is disposed between a branch point 21a located between the power supply unit 9 and the switch 11 and a branch point 21b located between the light emitting unit 6A and the second winding 7. The reason why the resistors R1 and R2 are arranged in this manner is to suppress the occurrence of problems such as abnormal voltage generation when the switches 10 and 11 described later are in an open state.

  Each of the switch 10 and the switch 11 can be switched between a state where the power from the power supply unit 8 and the power supply unit 9 is output to the light emitting units 5A and 5B and a state where the power is not output. Here, the structures of the switch 10 and the switch 11 are the same. The structure of the switch 10 (switch 11) will be described below.

  The switch 10 has a first contact 10a and a second contact 10b. The first contact 10a and the second contact 10b can be switched between a state where they are separated from each other and are not electrically connected, and a state where they are in contact with each other and are electrically connected.

  Here, as shown in FIG. 2, the switch 10 is arranged in contact with the outer surface of the compression connecting pipe 100. When the compression connecting pipe 100 generates heat, the switch 10 raises the temperature so that it follows the temperature of the compression connecting pipe 100 at the same time or slightly delayed.

  At least a part of the switch 10 is made of a shape memory alloy that deforms with temperature. Specifically, the first contact 10a in the switch 10 is made of a shape memory alloy that is deformed into a specific shape when a predetermined temperature or higher is reached.

  The first contact 10a made of the shape memory alloy is disposed so as to contact the second contact 10b, and then deformed so as to be separated from the second contact 10b. That is, at normal temperature, the first contact 10a is kept away from the second contact 10b. Then, when the temperature of the first contact 10a reaches a predetermined temperature or higher, the deformation is released so as to return to the original shape and contact the second contact 10b.

  The first contact 10a deformed so as to be in contact with the second contact 10b at a predetermined temperature or higher is increased even when the temperature of the first contact 10a is decreased from a temperature higher than the predetermined temperature to a temperature lower than the predetermined temperature. Maintains a deformed shape due to temperature. That is, when the first contact point 10a reaches a predetermined temperature or more, the first contact point 10a is deformed so as to contact the second contact point 10b and is electrically connected, and the temperature of the first contact point 10a is increased. Even when the temperature is lowered from a temperature equal to or higher than a predetermined temperature to a temperature lower than the predetermined temperature, the state of being in contact with each other is maintained and the state of being electrically connected is maintained. In other words, after the first contact point 10a reaches a temperature equal to or higher than a predetermined temperature, the first contact point 10a remains in contact with the second contact point 10b unless the first contact point 10a is deformed and separated from the second contact point 10b. .

  When the temperature of the first contact 10a reaches a predetermined temperature or higher, power is continuously output from the power supply unit 8 to the light emitting unit 5A. That is, the light emitting unit 5A continuously emits light after the temperature of the first contact 10a reaches a predetermined temperature or higher.

  Here, the shape memory alloy which comprises the 1st contact 10a can be suitably selected according to the temperature considered to be abnormal overheating. The shape memory alloy is preferably deformed at a temperature slightly lower than the abnormal superheating temperature.

  Further, a reset operation member arranged to be exposed to the outside of the housing 50 may be provided in order to stop the light emission in the light emitting unit 5A. Specifically, a reset operation member configured to be able to deform the first contact 10 a so as to be separated from the second contact 10 b may be disposed on the outer surface of the housing 50.

  Here, as described above, the switch 11 is configured similarly to the switch 10 described above.

Next, the operation of the abnormal overheat display device 1 will be described. Here, since the operation of each component on the first housing 51 side and the operation of each component on the second housing 52 side are the same, only the operation on the first housing 51 side will be described below.
The dielectric magnetic field due to the current flowing through the first electric wire 910 and the second electric wire 920 causes the winding 6 to generate electric power. This power is adjusted to a constant voltage by a rectifier circuit and a constant voltage circuit (not shown) arranged in the power supply unit 8. And the electric power of the power supply part 8 is output to the some LED light emission part 5a which comprises 5 A of light emission parts via the switch 10. FIG. The LED light emitting unit 5 a emits light by power from the power supply unit 8.

  First, as shown in FIG. 5A, the switch 10 is in a state in which the first contact 10a and the second contact 10b constituting the switch 10 are separated from each other and are not electrically connected at room temperature. is there. In this case, the power from the power supply unit 8 is not output to the LED light emitting unit 5a. That is, the LED light emitting unit 5a does not emit light.

  Next, when the compression connecting pipe 100 is abnormally overheated and the temperature of the compression connecting pipe 100 becomes equal to or higher than a predetermined temperature, the first contact 10a made of the shape memory alloy is deformed. And as shown in FIG.5 (b), it will be in the state which the 1st contact 10a and the 2nd contact 10b contact | abutted and were electrically connected. Thereby, since the electric power from the power supply part 8 is output to the LED light emission part 5a, the LED light emission part 5a light-emits.

  Subsequently, when the temperature of the compression connecting pipe 100 is lowered and the temperature of the compression connecting pipe 100 is lowered to a temperature lower than a predetermined temperature, the first contact 10a formed of the shape memory alloy maintains a deformed state. . That is, the first contact 10a, which is disposed so as to be in contact with the second contact 10b at a normal temperature and is deformed so as to be separated from the second contact 10a, is heated to a predetermined temperature or higher to have an original shape. To return to. And even if abnormal overheating temporarily stops for some reason and falls again to a temperature lower than the predetermined temperature, the first contact 10a maintains its original shape, so that the first contact 10a is separated from the second contact 10b. There is no deformation to separate.

  Here, as described above, the operation of the second contact 10b is the same as the operation of the first contact 10a.

  According to the present embodiment, since a special instrument is not required to monitor abnormal overheating in the compression connecting pipe 100 as a connecting portion that connects two overhead electric wires, monitoring work is easy.

  Further, according to the present embodiment, when the light is abnormally overheated, the light emitting units 5A and 5B emit light, which makes it easy to monitor from a distance. For example, monitoring in the patrol from the sky by a helicopter becomes easy.

  In addition, according to the present embodiment, the compression connecting pipe 100 that has a high possibility of having an abnormal part can be reliably identified even after the abnormal overheating has subsided.

  Moreover, according to this embodiment, since the 1st housing 51 and the 2nd housing 52 are electrically isolate | separated, a sealing process can be performed for every housing. Thereby, deterioration of the abnormal overheat display device 1 by rainwater can be suppressed. Moreover, since this sealing process can be performed at a factory before the attachment, the burden of the attachment work can be reduced.

  As mentioned above, although preferred embodiment of this form was described, this invention can be implemented with a various form, without being limited to embodiment mentioned above. For example, in the present embodiment, the annular magnetic core is constituted by two semi-annular magnetic cores, but is not limited thereto, and may be integrally constituted by one member.

  Further, in the present embodiment, the winding is disposed so as to be wound around the outer surface in a part of the annular direction in the annular magnetic core, but is not limited thereto, and is wound around the outer surface in the entire annular direction of the annular magnetic core. It may be arranged so that.

  Moreover, in this embodiment, although the housing 50 is comprised by two members, the 1st housing 51 and the 2nd housing 52, it is not limited to this, You may be comprised by many members.

The perspective view of the abnormal overheat display apparatus 1 with which the compression connection pipe | tube 100 was mounted | worn is shown. 2 is a cross-sectional view of the abnormal overheat display device 1 attached to the compression connecting pipe 100. FIG. The perspective view of the compression connecting pipe 100 which connects the 1st electric wire 910 and the 2nd electric wire 920 is shown. The figure explaining an internal structure at the time of arrange | positioning the abnormal overheat display apparatus 1 to the compression connection pipe | tube 100 is shown. The block diagram explaining the internal structure of the abnormal overheat display apparatus 1 is shown.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Abnormal overheat display device 3 1st annular magnetic core 4 2nd annular magnetic core 5 Light emission part 5A 1st light emission part 5B 2nd light emission part 6 1st winding 7 2nd winding 8 Power supply part 9 Power supply part 10 Switch 11 Switch 100 Compression Connecting pipe 910 First electric wire 920 Second electric wire

Claims (6)

An abnormal overheat display device arranged at a connection part connecting two overhead wires,
An annular magnetic core formed in an annular shape by combining one or a plurality of members;
A winding wound spirally around the outer surface of all or part of the ring direction in the annular magnetic core;
A power supply unit electrically connected to the winding;
A light emitting part that is emitted by the electric power from the power supply part and is exposed to the outside;
A switch that can be switched between a state in which power from the power source unit is output to the light emitting unit / a state in which the light emitting unit is not output, and
The switch switches from a state in which the power from the power supply unit is not output to the light emitting unit to a state in which the light is output when the temperature of the connection unit exceeds a predetermined temperature, and the temperature of the connection unit is the predetermined temperature. An abnormal overheat display device that maintains the output state even when the temperature drops from a temperature equal to or higher than a temperature to a temperature lower than the predetermined temperature. The switch has two contact points that are separated from each other and not electrically connected, and are in contact with each other and electrically connected,
The two contacts are
When the connection portion becomes equal to or higher than the predetermined temperature, the connection portion comes into contact with each other and is electrically connected, and the temperature of the connection portion is lower than the predetermined temperature from the temperature equal to or higher than the predetermined temperature. 2. The abnormal overheat display device according to claim 1, wherein even when the temperature is lowered, the abnormal overheat display device maintains an electrically connected state while maintaining a contact state with each other. At least a part of the switch is made of a shape memory alloy that is deformed by temperature,
The two contacts are
When the connection portion becomes equal to or higher than the predetermined temperature, the switches are brought into contact with each other by deformation, and the temperature of the connection portion is lower than the predetermined temperature from the temperature equal to or higher than the predetermined temperature. 3. The abnormal overheat display device according to claim 2, wherein the switch maintains a deformed state to maintain a contact state with each other even when the switch is lowered. A housing that is fitted over the two overhead electric wires;
The housing includes a first housing and a second housing disposed so as to face the first housing with the connection portion interposed therebetween.
The annular magnetic core is
A first semi-annular magnetic core disposed within the first housing and having the winding wound spirally around an outer surface;
4. The abnormal overheat display device according to claim 1, wherein the abnormal overheat display device is configured by a second semi-annular magnetic core that is disposed in the second housing and on which the winding is not spirally wound. 5. Further comprising another annular magnetic core,
The annular magnetic core is disposed at one end in the longitudinal direction of the housing and disposed on the outer periphery of one of the two overhead wires.
The other annular magnetic core is disposed at the other end in the longitudinal direction of the housing and disposed at the outer periphery of the other overhead electric wire, and is disposed within the second housing, and the winding is spirally formed on the outer surface. 5. The abnormal overheat display according to claim 4, comprising: a third semi-annular magnetic core wound around the first housing; and a fourth semi-annular magnetic core disposed in the first housing and having the winding not spirally wound around an outer surface. apparatus.   The abnormal overheat display device according to claim 1, wherein the light emitting unit is an LED light emitting unit.

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