JPS6340055Y2 - - Google Patents

Description

[Detailed description of the invention] Technical field of the invention This invention relates to a dew condensation prevention device in the electrical equipment room of a small industrial electric locomotive used mainly at mines, tunnel construction sites, etc.

Technical background of the invention Generally, as shown in Fig. 1, the above-mentioned small industrial electric locomotive has a pantograph 2 for power supply etc. on the car body 1, and wheels 3 and a main electric motor 4 for driving the wheels at the bottom of the car body 1. In addition, there is a driver's cab 5 on one end of the vehicle body 1, a main resistor 6 for controlling the current of the main motor 4 near the other end, and an electrical device for switching the main resistor adjacent to the other end. There is an electrical equipment room 7 that stores the following items.
Furthermore, a coupler 8 is provided at both ends of the vehicle body 1.

Here, as shown in FIGS. 2 and 3, the electrical equipment room 7 includes side frames 1a and 1b of the vehicle body 1.
The end frame 1c and the partition plate 1d are welded together, and the upper and lower and side frames 1
Covers 9a, 9b, 10a, and 10b for assembling and maintaining and inspecting internal equipment are attached to portions a and 1b by bolts 11 through dustproof and waterproof gaskets 10, respectively, to form a sealed structure. In addition, in the electrical equipment room 7, an equipment mounting frame 12 is fixed by welding or the like in a horizontal manner between the end frame 1c and the partition plate 1d, and the main circuit electrical components for switching the main resistor are mounted on this mounting frame 12. 13a, an auxiliary circuit electrical component 13b, etc. are attached. In addition, if necessary, a terminal block 14 for relaying electric wires can be installed on the end frame 1c.
Attached to the inside surface.

Problems with the Background Art The structure of the electrical equipment room 7 as described above has the following problems.

(1) Mine shafts and tunnel construction sites where this type of electric locomotive is used have high humidity, often exceeding 90%. On the other hand, the space inside the car body 1 is very narrow, which limits the placement of the main equipment, and the main resistor 6 has to be placed close to the electrical equipment room 7. 6
The electrical equipment room 7 is heated due to the temperature rise, and the electrical equipment in the electrical equipment room 7 generates heat, so that the indoor temperature rises. In other words, the inside of the electrical equipment room 7 becomes humid and high temperature during running. When the locomotive stops running, the indoor temperature drops below the steam saturation temperature. On the other hand, since the electrical equipment room 7 has a dust-proof and waterproof sealed structure, excess water vapor has no place to escape and condenses on the interior surfaces of the room and the electrical equipment inside.

(2) The temperature inside the electrical equipment room 7 rises while the locomotive is running, but the side frames 1a, 1b and inspection lids 9a, 9b, 10a, 10b are cooled by the running wind, so these frames The air on the inner surface of the lid is cooled and excess water vapor cannot be released in time, causing dew condensation on the frame and the inner surface of the lid.

(3) If the water droplets that have condensed due to (1) and (2) above are left as they are, rust will occur on the inner surface of the electrical equipment room 7, the mounting frame 12, the internal electrical components 13a and 13b, and the electrical contacts. Insulating materials that were not water resistant deteriorated and could no longer maintain sufficient insulation distance, causing short circuits, which posed the trouble of having to constantly wipe off water droplets before moving the locomotive.

Purpose of the invention This invention was created in view of the above circumstances. It effectively prevents dew condensation while the locomotive is running and when it is at rest. It also eliminates the need for troublesome work such as wiping off water droplets, making the initial inspection much easier. It is an object of the present invention to provide a dew condensation prevention device which is extremely simple in practical use and can reduce the occurrence of rust and deterioration of insulation inside an electrical equipment room, thereby extending the life of each equipment.

Summary of the idea This idea was developed by attaching a water-absorbing heat insulating board to the inner surfaces of the frame and lid of the electrical equipment room, which has an insulating effect that increases the temperature inside the electrical equipment room while the locomotive is running. Preventing the temperature drop caused by the cooling of the surrounding running air, reducing dew condensation around the room, and absorbing the condensed water droplets with the board, and installing a space heater in the lower part of the electrical equipment room to cool the engine. By connecting the space heater to an external power source via a lead wire when the vehicle is not in operation, the heat generated by the space heater evaporates the moisture absorbed by the board and keeps the interior of the electrical equipment above the steam saturation temperature to prevent condensation. The present invention is characterized by a device for preventing condensation in an electrical equipment room of an electric locomotive.

Embodiment of the invention An embodiment of the invention will be described below with reference to FIGS. 4 to 6. In the drawings, parts having the same configuration as those in FIGS. 2 and 3 are given the same reference numerals to simplify the explanation.

First, as shown in FIGS. 4 and 5, the frames 1a to 1d and the lid 9a that constitute the electrical equipment room 7 are assembled.
All of the dustproof and waterproof gaskets 10 and bolts 11 from 9d to 9d are the same as conventional ones, and have a sealed structure. Also, the mounting frame 12 and electrical components 13 in the chamber 7
a, 13b and the terminal block 14 are similarly provided. Space heaters (convection-type electric heaters) 20, 20 are attached to the lower part of the electrical equipment room 7 having such a configuration, that is, to the lower end portions of the inner surfaces of the end frame 1c and the partition plate 1d, respectively. Further, a water-absorbing heat insulating board is attached to the inner peripheral surface of the electrical equipment room 7. In other words, the top lid 9a, the inner surfaces of the left and right lids 9c and 9d, and the side frame 1
Insulating boards 21a, 21b, 21c and 2 that have water absorption properties on the upper part of each inner surface of the end frame 1c and the partition plate 1d except for a part of the lower end part.
1d, 21e, 21f, and 21g are attached to each other by adhesive or other means. The water-absorbing heat insulating boards 21a to 21g are, for example, asbestos cloth or the like with a thickness of about 2 to 3 mm, and are designed to protect the chamber 7 from wind from outside while the locomotive is running.
This reduces the temperature drop around the inside and absorbs condensed water droplets. The space heaters 20 have a capacity that can keep the chamber 7 above the steam saturation temperature when the locomotive is stopped, and usually the first space heater 20 is used to prevent dangers such as runaway when the locomotive is stopped.
Connect the pantograph 2 shown in the figure to the power line (not shown)
Since all power sources are turned off at a distance from the locomotive, power is supplied to the space heaters 20 independently from the locomotive's external power source. In other words, as shown in FIG. 6, each space heater 2 in the electrical equipment room 7
A lead wire 23 connected to 0... and with a plug 22 attached to the tip is stored in an appropriate location on the car body 1 of the locomotive, and when the locomotive is stopped, the lead wire 23 is pulled out and installed in a mine shaft or tunnel. A plug 22 is inserted into a power outlet 25 provided on a wall 24 for connection.

To explain the operation of the above-mentioned configuration, when the locomotive is running in a humid site such as a mine shaft or a tunnel, heat from the adjacent main resistor 6 and electrical components 13a in the electrical equipment room 7 are generated. , 13b causes the temperature inside the chamber 7 to rise. On the other hand, the side frames 1a, 1b and the lids 9a, 9c, 9d are cooled by the running wind. This will cool the surrounding air in the room 7, but the insulation boards 21a to 21g
The cooling effect is alleviated due to the insulation effect of the chamber 7.
There will be less condensation around the inside. Despite this, the condensed water droplets are absorbed by the insulation boards 21a to 21g and drip onto the internal electrical components 13a and 1.
No more sticking to 3b etc.

The next time the locomotive stops, all power is cut off to the locomotive and the temperature, including the inside of the electrical equipment room 7, falls. During this stop, the lead wire 23 is pulled out and plugged in. 22 is connected to the external power outlet 25, the space heater 20 at the bottom of the electrical equipment room 7 is operated, and the temperature inside the room 7 is raised by convection caused by this heat generation, and the insulation boards 21a to 21g are In addition to vaporizing the absorbed moisture, the interior of the chamber 7 is maintained at a temperature equal to or higher than the steam saturation temperature to prevent condensation.

Effects of the invention This invention has been made as described in detail above, so the cooling of the area around the interior of the electrical equipment room by the running wind while the locomotive is running is slowed down by the heat insulating board.
In addition to minimizing condensation on the surrounding surfaces of the interior, condensed water droplets can be absorbed by the insulation board and prevented from dripping, and the space heater at the bottom of the electrical equipment interior can be connected to an external power source when the locomotive is not in operation. In this way, the moisture absorbed by the insulation board is vaporized, and the inside of the electrical equipment room is maintained at a temperature higher than the steam saturation temperature, thereby preventing dew condensation. Therefore, since there is no condensation inside the electrical equipment room, there is no need to wipe off water droplets, making inspections at the start of work extremely easy, and reducing rust and insulation deterioration of indoor electrical equipment, etc., thereby extending the life of the equipment. This is extremely simple and effective in practice.

[Brief explanation of the drawing]

Fig. 1 is a side view showing the schematic configuration of a general small electric locomotive, Fig. 2 is a sectional view of a conventional electrical equipment room taken along the - line in Fig. 1, and Fig. 3 is a - diagram in Fig. 2.
4 to 6 show an embodiment of this invention, and FIG. 4 is a sectional view of a portion corresponding to FIG. 2, and FIG. 5 is a sectional view taken along the - line of FIG. 6 is a wiring diagram for connecting an external power source to the space heater. DESCRIPTION OF SYMBOLS 1...Vehicle body, 2...Pantograph, 3...Wheels, 4...Main motor, 5...Driver's cab, 6...Main resistor, 7...Electrical equipment room, 8...Coupler, 1a,
1b... Side frame, 1c... End frame, 1d... Partition plate, 9a to 9d... Lid, 10
...Packskin, 11...Bolt, 12...Mounting frame, 13a...Main circuit electrical components, 13b...Auxiliary circuit electrical components, 14...Terminal block, 20...Space heater, 21a to 21g...Water absorption insulation board.

Claims (1)

[Scope of utility model registration request] An electrical appliance characterized by having a water-absorbing heat insulating board attached to the inner peripheral surface of an electrical equipment room with a sealed structure in which electrical equipment is installed and stored, and a space heater that can be connected to an external power source at the bottom of the electrical equipment room. Condensation prevention device for locomotive electrical equipment room.