JPH0572080A - Temperature monitor device of bus duct - Google Patents

Abstract

PURPOSE:To obtain the title device having simple and inexpensive constitution and easy in maintenance. CONSTITUTION:An abnormal temp. detection part 1 having a temp. sensor 2 and equipped with an alarm lamp 7 allowed to light when the temp. sensor detects an abnormal temp. rise is provided in the, vicinity of each conductor connection part. The detection output of the abnormal temp. detection part 1 is guided to an alarm device 8 equipped with the alarm lamp 12 and an alarm buzzer 13 provided in a neutral control room by a common signal wire 9.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a temperature monitoring device for a bus duct.

[0002]

2. Description of the Related Art A bus duct line is constructed by mounting a large number of flat conductors insulated from each other in a bus duct casing. Thus, the connection between the flat conductors is made by bolting.

In some cases, the bolted connection may be insufficiently tightened from the beginning, or the bolt may be loosened for a long time after the bus duct is laid.

Although the inspection of the tightened state of the bolts is mainly performed by visual inspection by an operator, in order to avoid uncertainties and complications, a temperature sensor is attached to the conductor connecting portion to cause an abnormal temperature rise in the connecting portion. The method of centralized monitoring has been adopted. In this system, a temperature detection sensor such as a thermostat or shape memory alloy is provided on the surface of the bus duct casing near the conductor connection to be monitored.
Lead wires are individually drawn from these temperature detection sensors to the central control room, and the temperature of each connection part is monitored by the monitoring means in the central control room. I can know.

[0005]

However, in the above-mentioned conventional temperature monitoring device, the number of quadrature wires of the temperature detecting sensor is required, which complicates the wiring structure and increases the cost of the bus duct line. Also, there is a problem that it is difficult to attach it to the existing bus duct line.

The present invention has been made based on the above circumstances, and provides a bus duct temperature monitoring device capable of centrally monitoring the temperature of a conductor connecting portion with a simple structure.

[0007]

According to another aspect of the present invention, there is provided a temperature monitoring device for a bus duct, wherein a temperature sensor is provided at a position near a conductor connecting portion of a bus duct casing, a reference value setting unit for setting a reference temperature at the position, and the temperature. A comparison circuit for comparing the output of the sensor and the set value of the reference value setting unit, and an abnormal temperature detection unit equipped with a light emitting means driven by the output of this comparison circuit, respectively installed, the abnormal temperature detection unit The detection output is connected to the alarm device of the centralized monitoring section through a common signal line.

[0008]

In the bus duct temperature monitoring device of the present invention having the above-described structure, when an abnormal temperature rise is detected by any of the abnormal temperature detection units, an alarm lamp of the abnormal temperature detection unit is turned on, and an alarm device in the central control room. The warning lamp is lit up and the alarm buzzer sounds, and the occurrence of abnormal temperature rise is announced. Therefore, by patrol along the bus duct line and discovering the abnormal temperature detection part where the alarm lamp is lit,
It is possible to identify a connection portion having an abnormal temperature rise.

[0009]

Embodiments Embodiments will be described below with reference to the drawings. Figure 1
Is a circuit diagram of one embodiment of the present invention, FIG. 2A is a cross-sectional view of a bus duct showing a temperature sensor installation state, and FIG. 2B is a side view of the bus duct showing a temperature sensor installation state.

In FIG. 1, an abnormal temperature detecting section 1 attached to a portion of a bus duct casing facing each connecting portion of a conductor includes a temperature sensor 2 and a reference setting section 3 for setting a reference temperature of a temperature sensor installation portion. , Power supply unit 4 such as dry batteries
A comparator circuit 5; a lamp driving circuit 6 which receives the output of the comparing circuit 5 as an input; and an alarm lamp 7 which is lit by the lamp driving circuit. The output of the comparing circuit 5 is in a central control room. It is connected to a common signal line 9 connected to the alarm device 8. Although only two temperature detectors are shown in FIG. 1, actually, the abnormal temperature detectors 1 are provided by the number of conductor connecting portions.

The alarm device 8 in the centralized control room has a lamp drive circuit 10 and a buzzer drive circuit 11 which operate by receiving a signal from the common signal line 9, an alarm lamp 12 driven by the lamp drive circuit, and the buzzer. Drive circuit 11
And an alarm buzzer 13 driven by.

In the embodiment having the above structure, the looseness of the connecting bolt of the conductor connecting portion is detected as follows. If the connection bolt is loosened at any of the conductor connection portions and the resistance at the connection portion is increased, the temperature is increased at that portion. This temperature rise is detected by the temperature sensor 2, and the detection output and the set value in the reference setting unit 3 are input to the comparison circuit 5 and compared there.
When the temperature rise becomes larger than the reference value set in the reference setting section 3, the comparator circuit 5 produces an output and the lamp drive circuit 6
The alarm lamp 7 is turned on via.

At the same time, the output of the comparison circuit 5 is sent to the common signal line 9 to activate the alarm device 8 in the central control room. That is, the lamp drive circuit 1 of the alarm device 8
0, the buzzer drive circuit 11 thereby causes the alarm lamp 12,
Energize the alarm buzzers 13 and activate them.

The maintenance staff stationed in the centralized control room knows that an abnormal temperature rise has occurred at any of the conductor connection parts by the visual and audible alarm notifying the abnormal temperature rise. The maintenance staff or other appropriate monitoring staff patrols along the bus duct line to check whether or not the alarm lamp 7 of the abnormal temperature detecting portion 1 provided corresponding to each conductor connecting portion is turned on. Since the alarm lamp 7 is turned on only at the conductor connection portion where the abnormal temperature rise is observed, the location where the abnormal temperature rise occurs can be detected by the above inspection.

2A and 2B, the specific structure of the abnormal temperature detector 1 is shown. The temperature sensor 2, the reference setting unit 3, the power supply unit 4, the comparison circuit 5, the lamp drive circuit 6, and the alarm lamp 7 which compose the abnormal temperature detection unit 1 described in FIG. 1 are collectively housed in the housing 1a. , The casing 1a is a bus duct casing 1 in the vicinity of the conductor connecting portion.
It is attached to the side plate 14a of No. 4 by the fixing bolt 15. The abnormal temperature rise in the conductor connecting portion is caused by the side plate 14a.
The temperature sensor 2 housed in the housing 1a detects this and activates the alarm lamp 7 and activates the alarm device 8 in the central control room in accordance with the above description.

In the temperature detecting device for the bus duct of the present invention having the above-mentioned structure, the abnormal temperature detecting parts 1 are installed corresponding to the conductor connecting parts, and the detection outputs of them are provided by the common signal line 9 in the central control room. Since it can be configured by connecting to 8, the structure can be relatively simple and maintenance is easy. As described above, in the device of the present invention, it is only possible to detect the occurrence of abnormal temperature rise in the central control room, and it is not possible to specify the location where the abnormal temperature rise occurs. It can be said that there is no practical problem if patrol is performed.

Further, in the temperature detecting device for the bus duct of the present invention, a plurality of abnormal temperature detecting portions 1 are attached to the outer surface of the side plate 14a of the bus duct casing 14 facing the conductor connecting portion, and the detection output of each temperature detecting portion 1 is shared. Since it can be configured only by guiding it to the temperature detecting device 8 in the central control room by the communication line 9, it can be installed extremely easily even on an existing bus duct line. Further, the abnormal temperature detection unit 1 can use the same structure for all the conductor connection portions, and can be standardized, so that the cost can be reduced.

[0018]

As is apparent from the above, in the temperature detecting device for the bus duct of the present invention, the occurrence of an abnormal temperature rise at the connecting portion can be detected in the central control room, and after detection, patrol along the bus duct line. However, since it is possible to identify the conductor connection part in which the abnormal temperature rise has occurred due to the lighting or non-lighting of the alarm lamp of the abnormal temperature detection part, maintenance and management of the bus duct line can be satisfactorily performed by a device with a relatively low cost be able to.

[Brief description of drawings]

FIG. 1 is a circuit diagram of an embodiment of the present invention.

FIG. 2A is a cross-sectional view of the bus duct showing a temperature sensor installation state, and B is a side view of the bus duct showing a temperature sensor installation state.

[Explanation of symbols]

 1 ...... Abnormal temperature detection unit 1a ... Case 2 ......... Temperature sensor 3 ...... Standard setting unit 4 ...... Power supply unit 5 ... Comparison circuit 6 ... Lamp drive circuit 7, 12 ... Alarm Lamp 8 ………… Alarm device in the central control room 9 ………… Common signal line 10 ………… Lamp drive circuit 11 ………… Buzzer drive circuit 13 ………… Alarm buzzer 14 ………… Bus duct casing 14a …… Side plate

Claims (1)

[Claims] 1. A temperature sensor, a reference value setting unit for setting a reference temperature at the position, an output of the temperature sensor and a set value of the reference value setting unit at a position near a conductor connecting portion of a bus duct casing. An abnormal temperature detecting section comprising a comparing circuit for comparison and a light emitting means driven by the output of this comparing circuit is installed respectively, and the detection output of these abnormal temperature detecting sections is provided to the alarm device of the centralized monitoring section through a common signal line. A temperature monitoring device for a bus duct characterized by being connected.