JPH0735781Y2 - Temperature detection device for feeders on train lines - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention relates to a temperature detecting device for a feeder fitting for connecting trolley wires to each other or for connecting feeder wires and overhead wires in electric power lines. It is a thing.

[Conventional technology]

The electric power of the electric vehicle is supplied to the trolley wire from the substation through feeder lines and feeder branch lines. For example, FIG. 5 shows an example of an overhead line structure. In the figure, the electric power of the electric car is fed through a feeder line 1 transmitted from a substation, a suspension line 2 (messenger line) stretched above the rail, and a feeder branch line 3. Trolley line 4 from overhead line 2
The power is supplied through the branch line 5.

In such a feeder structure, various feeder fittings are used. For example, a sleeve 6 for connecting feeders, a T-type connector 7 for feeder branching for connecting feeders and feeder branches, a connector 9 for feeder branching, a suspension wire 3 and a trolley wire 4
Connectors 8 and 10 used for connection with.

[Problems to be solved by the device]

In the above feeder structure, the connector and sleeve that are feeder fittings are connected at the site by crimping, bolting, etc., and the old wire and the new wire may be connected. As a result, the electrical connection may be incomplete. If the electrical connection is not complete, the current may generate heat and the wire may melt in some cases. In addition, most of the feeders such as connectors are tightened by bolts, but the whole overhead wire is shaken by the passage of a pantograph that slides on a trolley wire, so that the bolts are loosened and the contact pressure is reduced. Even in such a case, electrical connection becomes incomplete, heat is generated by the load current, the electric wire is melted, and an overhead wire accident occurs.

In order to prevent such an accident, a means for attaching a temperature label that changes color due to a change in temperature when the temperature of the feeder is abnormally increased due to heat generation is adopted. This method is a method in which an inspector visually checks whether or not the temperature label is discolored to check for the presence of heat. However, the temperature sensor using the temperature label has a problem that it is difficult to identify whether or not the color has changed when dust or dust is attached.

An object of the present invention is to provide a temperature detecting device for a feeder fitting on an electric power line that allows an inspector to easily and reliably identify that the feeder fitting has reached a predetermined temperature or higher. Means for Solving the Problem] In order to achieve the above object, the present invention provides a temperature detecting device for a feeder fitting that connects each feeder or a feeder and an overhead wire in a train line. The base end of the spring material is fixed to the metal fitting, the tip of the spring material is locked to a temperature sensor made of a low melting point metal fixed to the electrical fitting so as to be able to conduct heat, and a sign is fixed to the spring material. That is the summary.

[Action]

When the feeder metal reaches a certain temperature or higher, the temperature sensor melts due to heat conduction, and the spring body that was locked to the temperature sensor is restored and deformed, and the indicator fixed to the spring material is displayed at the predetermined position. It enables an inspector to easily identify that the electrical fitting has reached a predetermined temperature or higher.

〔Example〕

 The present invention will be described below based on the illustrated embodiment.

In the first embodiment shown in FIGS. 1 and 2, the sleeve 6 used for linearly connecting the feeders is equipped with the temperature detecting device of the present invention.

A sleeve 6 is fitted between the feeder wires 1 and 1 that are butted against each other, and the sleeve 6 is connected by crimping. The support 11 is arranged along a part of the outer surface of the sleeve 6, and the support 11
Is fixed to the outer circumference of the sleeve 6 with bands 12 and 12. This band 12 may be one, but in the embodiment, it is a support
Two are used to fix 11 more securely. With this band 12, the outer surface of the sleeve 6 and the support 11 are brought into close contact with each other,
The heat conduction from the sleeve 6 to the support 11 is made good.

One end of a spring material 13 such as a piano wire or a strip-shaped plate spring is fixed to the support body 11. The spring member 13 is fixed to the support body 11 by fitting, welding or the like to the support body so that the spring material 13 is not pulled out accidentally. The developed length of the spring member 13 surrounds the outer circumference of the sleeve 6, and the other end is bent into a U-shape to form a locking piece 13a. The locking piece 13a is fixed to the support body 11 in a rod shape. The temperature sensor 14 is hooked and locked. The temperature sensor 14 is made of a low melting point metal that melts at a predetermined temperature and is fixed to the support 11. A mark 15 is fixed near the locking piece 13a of the spring material 13.

The operation of the temperature detecting device in this embodiment will be described below.

As shown in FIG. 1, when the spring material 13 surrounds the outer circumference of the sleeve 6 and is hooked and locked by the temperature sensor 14 of the support 11, when the sleeve 6 reaches a set temperature or higher, the temperature sensor 14 After the fusing, the locking pieces of the spring material 13 are naturally released, and the restoring force of the spring material 13 causes the spring material 13 to return to a linear shape as shown by a chain line. Based on the shape of the spring material 13 and the position of the standard 15 fixed to the spring material 13, the inspector visually identifies that the feeding metal has reached a predetermined temperature or higher.

The embodiment shown in FIGS. 3 and 4 is one in which the temperature sensor 14 is directly embedded in the clamp 20 composed of two ear pieces that sandwich the two parallel electric power lines 21 and 22 together.

The two ear pieces 20A, 20B of the clamp 20 are fixed by bolts 23. A groove 20m is formed in a part of the outer surface of the one ear piece 20A on one end side, and the spring member 13 is formed in the groove 20m. The locking piece 13a of 1 can be inserted. The locking piece 13a has a U-shaped bent shape, and is hooked and locked by the rod-shaped temperature sensor 14 embedded and fixed in the ear piece 20A. The base end side of the spring material 13 is fixed to the outer portion of the ear piece 20A on the other end side. Therefore, as shown in FIG. 3, the spring member 13 is arranged along the longitudinal direction of the outer surface of the ear piece 20A, and is bent to lock the locking piece 13a to the temperature sensor 14. This temperature sensor 1
4 is made of a low melting point metal that melts at a predetermined temperature. A mark 15 is provided near the locking piece 13a of the spring member 13.
To fix.

The operation of the temperature detecting device in this embodiment will be described below.

When the fastening force of the bolts 23 of the ear pieces 20A, 20B decreases due to the loosening of the bolts 23 and the contact pressure between the ear pieces 20A, 20B and the train lines 21, 22 decreases, the ear pieces 20A, 20B generate heat due to the current. . When the temperature of the ear piece 20A rises above the set temperature, the temperature sensor 14 melts down, the locking piece of the spring material 13 naturally disengages, and the spring material 13 has a linear shape as shown by the chain line due to the restoring force of the spring material 13. Return to. Based on the shape of the spring material 13 and the position of the marker 15 fixed to the spring material 13, the inspector visually identifies that the feeding metal has reached a predetermined temperature or higher.

[Effect of device]

According to the present invention, the feeding metal fittings generate heat due to abnormal current or the like,
When the temperature reaches the set temperature, the temperature sensor that locks the spring material melts down, and the restoring force of the spring material changes the shape of the spring material greatly, which facilitates visual identification.

In addition, the temperature sensor is fixed to the feeder fitting so that heat can be conducted,
Since the heat conduction from the feeder fitting is kept good until the temperature sensor is melted, it has certainty.

Further, even if dust or the like adheres to the spring material or the like, there is an advantage that the operation is reliable and the identification is not impossible.

[Brief description of drawings]

FIGS. 1 and 2 show the first embodiment, FIG. 1 is a longitudinal side view, FIG. 2 is a front view, FIGS. 3 and 4 show a second embodiment, and FIG. 3 is a front view. FIG. 4 and FIG. 4 are plan views, and FIG. 5 is an explanatory view showing a usage state of a feeder fitting on a train line. 1 feeder cable, 6 clamp, 11 support, 13 spring material,
13a is a locking piece, 14 is a temperature sensor, 15 is a sign, 20 is a clamp, and 20A and 20B are ear pieces.

Claims (1)

[Scope of utility model registration request] 1. A temperature detecting device for a feeder fitting for connecting each feeder wire or a feeder wire and an overhead wire in an electric power line, wherein a base end of a spring material is fixed to a feeder fitting such as a sleeve or a clamp, and the spring is fixed. A temperature detecting device for a feeder in a train line, wherein a tip of a member is locked to a temperature sensor made of a low melting point metal fixed to a feeder so as to be able to conduct heat, and a mark is fixed to the spring material.