JPH04138009A - Phase separating bus device - Google Patents

Abstract

PURPOSE:To prevent the pollution of an objective and facilitate the inspection by setting a hollow insulating tube in the holes, which are made at the reciprocally corresponding positions of a housing and a conductor, by means of flanges, and covering the hole of the housing with a box, which has an infrared ray temperature detector within. CONSTITUTION:A conductor 2 for letting a large current flow is arranged coaxially in a housing 1. Openings are provided at the reciprocally corresponding positions of the conductor 2 and the housing 1, and one end of a hollow insulating tube 14, which has a through hole 14a, is fixed to the seat plate 12 welded to the side of the conductor 2, and the flange 15 at the other end of the tube 14 is fixed to the flange 13 welded to the housing 1 with screws. An infrared ray temperature detector 7 is held in the hole 13a provided at the center of the flange by a holder 16, and an objective 9 is made to front on the through hole 14a. The infrared ray detector 7 is covered with a box 17 and is shut off from outside air, and is connected to a signal processor 10 by a lead wire 11. Hereby, the pollution and the damage of the objective are prevented, and maintenance and the inspection can easily be performed. This is suitable for the large current bus of a power station.

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention is useful for connecting generators and main transformers in power plants, etc. The present invention relates to a phase separation TM device that is used as a power distribution line and has an infrared temperature detection device that detects abnormality by detecting the temperature of a conductor.

[Conventional technology]

FIG. 3 is a sectional view showing the structure of a conventional phase separation bus bar of this type, which is disclosed in, for example, Japanese Utility Model Application Publication No. 50-96916.

In the figure, (1) is the outer sheath, (2) is the cylindrical conductor arranged concentrically inside the outer sheath (1), and (3) is the cylindrical conductor placed upright at the bottom of the outer sheath (1). Support insulators that support the conductor (2) and are provided at predetermined intervals in the longitudinal direction of the jacket (1). (4) is a hole drilled in the side of the outer cover (1);
(5) is a flange welded to the side of the jacket (1) to surround this hole (4), (6) is a box attached to this flange ((5), and (7) is this box) (6) Infrared temperature detection unit fixed by the mounting frame (F), (9) is the objective lens provided near the hole (A) facing the conductor (2), Ql is the lead wire (11) This is a signal processing section connected to the infrared temperature detection section (7) via the infrared temperature detection section (7).

Next, the operation will be explained. The infrared temperature detection section (7) constantly detects the temperature of the conductor (2) using infrared rays emitted from the conductor (21). If the temperature of conductor (2) becomes abnormally high, such as by rising to
The temperature detection signal from the infrared temperature detection section (7) is processed by the signal processing section α0), and an alarm is issued to notify of conductor temperature abnormality. In addition, in the case of a ventilation-cooled phase-separated busbar that cools the insulated space surrounded by the conductor (2) and the jacket (1) by blowing cooling air, for example, if the cooling air stops due to a failure of the ventilation blower, When the temperature of the conductor (2) rises abnormally, an alarm is issued in the same manner as above, or the conductor (2)
2) Runback control is performed to quickly reduce the output of the generator passing the load current and reduce the load current.

[Problem to be solved by the invention]

Since the conventional phase separation bus bar is configured as described above,
Although high measurement accuracy is required for temperature detection by the infrared temperature detection section (7), the objective lens (9) is exposed in the space between the outer sheath (1) and the conductor (2). As a result, minute dust particles carried by natural convection of air and cooling drafts in the space adhere, causing a decrease in measurement accuracy. Therefore, it is necessary to frequently clean the objective lens (9) and calibrate the temperature of the infrared temperature detection section (7), and when periodically inspecting the phase separation bus,
Maintenance personnel may crawl into the narrow space inside the outer cover to clean the support insulator (3) or retighten bolts, or they may accidentally damage the objective lens (9). There were many problems in terms of maintenance and inspection work, such as the possibility of accidents.

This invention was made to solve the above-mentioned problems; it eliminates the need for cleaning the objective lens and calibrating the temperature of the infrared temperature detection section, and also eliminates the risk of damaging the objective lens during periodic inspections. The purpose of this invention is to provide a phase-separated bus device with no phase separation.

[Means to solve the problem]

A phase-separated busbar device according to the present invention includes a conductor provided in a jacket and extending concentrically with the jacket, an end side facing a side surface of the conductor, and the other end side of the jacket. an insulating cylinder having through holes each opening to the outside, and having both ends fixed to the outer sheath and the conductor so that the atmospheres inside the through holes and the inside of the outer sheath do not mix; An infrared temperature detection section is provided at the other end side opening of the insulating cylindrical body, facing the side surface of the conductor.

[Effect]

The insulating cylinder in this invention prevents the objective lens from being exposed to the outer atmosphere and attracting dust, and
To prevent workers from touching the objective lens during periodic inspection of the phase separation bus bar.

[Embodiments of the invention]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a sectional view showing the configuration of a phase separation bus device according to an embodiment of the present invention. In FIG. )
, the signal processing section αω, and the lead II (11) are the same as those of the conventional device shown in FIG. 3, and therefore their explanation will be omitted.
<12) is a seat plate fixed to the side of the conductor (2) by welding,
(13) is a flange fixed by welding to a position corresponding to the seat plate (12) on the side of the outer cover (1), and a hole (13) in the center.
3a) are drilled. (+41 is a through hole (14
an insulating cylinder with a flange (I5) fixed to one end by bolts, one end to the flange (13) via the flange (15), and the other end to the seat plate (12) with bolts. It also serves as a support insulator for the conventional device shown in FIG. (16) is a holder that holds the infrared temperature detection part (7) and is fixed to the flange (15) with bolts, and (17) is fixed to the flange (13) with bolts and covers the infrared temperature detection part (7). It is a box body.

In one embodiment constructed as described above, the seat plate (12) welded to the conductor opening has the same temperature as the conductor (2), and the infrared rays emitted from the seat plate (12) are transmitted to the insulating cylinder (
The temperature of the conductor (2) can be detected by passing through the inside of the through hole (14a) of 14) and reaching the infrared temperature detection part ■, and when the temperature of the conductor (2) rises abnormally due to some reason, etc. As in the conventional device, the signal processing section [1
0) and take measures such as issuing an alarm. On the other hand, since the objective lens (9) is sealed within the through hole (14a) of the insulating cylinder (14), dust does not adhere to it, eliminating the need for cleaning and temperature calibration of the infrared temperature detection unit 00). It is not loose and there is no risk of maintenance personnel accidentally touching it during periodic inspections.

FIG. 2 is a sectional view showing the configuration of a phase separation bus device in another embodiment of the present invention. In the figure, the same reference numerals as in Figure 1 indicate the same parts. (18) is fixed by welding to the side of the conductor port, and a gasket groove (18a) is formed on the side facing the outer cover (1). Is the seat plate (19) a gasket? 11 (18a) and glued gas get,
(20) is a branch pipe with a notch formed on the side surface of the outer cover (1) at a position facing the seat plate (18), and a branch pipe protruding from the notch by welding;
(21) is a flange fixed to the tip of this branch pipe (20) by welding, and (22) is an insulating cylinder having a through hole (22a) and a flange (23) fixed to one end by brazing or the like. ,
When the flange (23) is fixed to the flange (21) with bolts, the other end is in a state where the gasket (19) is compressed by an appropriate amount, and the end face is sealed.

It goes without saying that other embodiments configured as described above also have the same effects as the one embodiment shown in FIG. 1, but the insulating cylinder (22) is completely separate from the supporting insulator (3). By doing so, other supporting components of the conductor port (
This is further advantageous from the point of view of coordination and standardization of support components (not shown).

In each of the above embodiments, the cylindrical conductor (2) has been described, but it goes without saying that the same effect can be achieved even if the present invention is applied to a prismatic, U-shaped, or flat plate-shaped conductor.

〔Effect of the invention〕

As described above, according to the present invention, one end side has a through hole that faces the side surface of the conductor and the other end side opens to the outside of the jacket, so that the atmosphere between the through hole and the inside of the jacket is An insulating cylinder whose both ends are fixed to the jacket and the conductor so that they do not intersect; To provide a phase separation bus device which does not require cleaning of an objective lens and temperature calibration of an infrared temperature detection part because it is equipped with a temperature detection part, and also eliminates the risk of damage to the objective lens during periodic inspection. becomes possible.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing the configuration of a phase separation bus device in one embodiment of the present invention, FIG. 2 is a sectional view showing the configuration of a phase separation bus device in another embodiment of the invention, and FIG. FIG. 2 is a cross-sectional view showing the configuration of a conventional phase separation bus device. In the figure, (1) is the outer cover, (2) is the conductor, (7) is the infrared temperature detection section, (9) is the objective lens, (+4) (2
2) is an insulating cylinder, and (14a) and (22a) are through holes. Note that the same reference numerals in each figure indicate the same or corresponding parts.

Claims (1)

[Claims] A conductor provided within the outer sheath and extending concentrically with the outer sheath, and a through hole having one end facing a side surface of the conductor and the other end opening to the outside of the outer sheath. , an insulating cylindrical body having both ends fixed to the outer sheath and the conductor so that atmospheres within the through hole and the inside of the outer sheath do not mix;
A phase separation bus device characterized in that the objective lens includes an infrared temperature detection section provided at the other end side opening of the insulating cylinder and facing a side surface of the conductor.