JPS585500B2 - Mercury filling device for tubes - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for manufacturing a fluorescent lamp, and more particularly to a mercury filling apparatus for filling a fixed amount of mercury into a fluorescent lamp tube during an evacuation process.

Conventionally, in the exhaust process, devices for sealing mercury into fluorescent lamps have consisted of a mouth rubber that engages with the exhaust capillary of the fluorescent lamp, a pinch cock, and a container for storing the mercury to be sealed. There is a device shown in No. 8873, which does not provide a mercury reservoir for each exhaust head and supplies one dose of mercury to each exhaust head from one mercury reservoir, but all of them are similar to a source lamp. When trying to enclose mercury particles in a tube having a narrow exhaust pipe, there is a problem in that the dropped mercury tends to adhere to the inner wall surface of the exhaust pipe, and the amount of discharged mercury tends to fluctuate.

In order to prevent this, a possible method is to subject the inner surface of the exhaust capillary to a surface corrosion treatment using hydrofluoric acid to reduce the contact angle with mercury that tends to adhere to the inner surface, thereby preventing it from adhering to the inner wall of the exhaust capillary. However, it is necessary to subject all of the exhaust capillaries of each lamp tube to surface corrosion treatment with hydrochloric acid, and furthermore, when this surface corrosion treatment is performed, another problem arises in that the cost of waste liquid treatment increases.

The present invention has been made in view of the above-mentioned drawbacks, and it is an object of the present invention to provide a device which eliminates these various problems and seals a prescribed amount of mercury into each plan tube.

An embodiment of the present invention will be described below based on the drawings.

In the figure, reference numeral 1 denotes a mercury particle coating device body, and a funnel-shaped portion 3 having a mercury particle guide hole 2 is rotatably housed in the fin of the main body 1.

4 is a bearing that holds the funnel-shaped part 3; 5 is a rotation transmission gear connected to the drive motor 6; It has become.

This powder supply container 7 is attached to a vibrating arm 9 directly connected to a vibrator 8.

Furthermore, the powder supply container 7 is formed with a lid 10 and a fill 11.

12 is a chemically stable powder such as one or more powders of zirconium oxide, aluminum oxide, titanium oxide, hafnium oxide, yttrium oxide, and magnesium oxide powder, which is stored in the powder supply container 7.

On the other hand, the mercury grain coating device 24 further constituted by the mercury grain coating device main body 1 and the powder supply container 7 has a mercury grain coating device 24 that faces the inner edge 3a of the funnel-shaped portion 3 and is spaced apart from the powder supply container 7. A mercury measuring device 14 is provided at the position, and a mercury particle guide portion 17 of a coating mercury dripping device (exhaust head) 17 is provided at the bottom 2a of the mercury particle guide hole 2 provided in the mercury particle coating device main body 1.
It faces a.

Next, the operation of the above embodiment will be explained.

The slope of the funnel-shaped part 3 of the mercury particle coater main body 1 is rotated at an extremely low speed by the rotation transmission gear 5, and the powder 12 in the powder container T, which is being vibrated by the vibrating arm 9, is transferred to the filter 1.
1 and is supplied from the powder supply port 7a, forming an appropriate amount of powder layer 16.

When the mercury particle guide portion 17a of the exhaust head 17 installed in the exhaust device is indexed to a position opposite to the mercury guide hole bottom 2a provided in the mercury coating main body 1, mercury particles appear on the powder layer 16. The measuring device 14 drips only the required amount of mercury particles 15 at one time.

The mercury particles 15 are sufficiently coated with powder while rolling down on the powder layer 16 formed on the slope of the funnel-shaped portion.

The coated mercury particles 15 pass through the mercury particle guide hole 2 communicating with the fin of the leak-shaped part 3, and are dropped into the mercury particle guide part 17a of the exhaust head 17 facing the bottom 2a of the mercury particle guide hole 2, and are dropped into the upper rotary operating valve 18. It is stored in the clasp 18a.

Next, the upper rotary valve 18 rotates, and the mercury particles 15 are stored in the catch 19a of the lower rotary operating valve 19.

Then, when the exhaust head 17 finishes degassing the source material and electrode material of the source lamp in the exhaust process and is indexed to a predetermined mercury filling position, the lower rotary operating valve 1
9 rotates, and the mercury particles 15 stored in the clasp 19a are discharged into the exhaust space 21, which is exhausted by the vacuum suction piping 20.
After passing through the exhaust capillary tube 22 of the source lamp 23, it is sealed inside the source lamp tube 23.

Thereafter, the exhaust capillary tube 22 is sealed and the desired mercury particles are secured within the lamp.

In the series of mercury enclosing devices described above, the structure of the exhaust head 17 is not limited to that shown in this embodiment; for example, the exhaust head shown in Japanese Patent Publication No. 50-8873 may be used. It is possible.

As explained above, the present invention applies a chemically stable powder to the slope of the funnel-shaped part provided on the mercury grain coater body, and by rolling a specified amount of mercury grains on this surface, the surface of the mercury grains is coated. A sufficient powder film can be formed, and the mercury grains are protected by the powder layer, preventing them from adhering to the inner wall of the exhaust capillary, ensuring that the specified amount of mercury measured by the mercury meter remains inside the lamp tube. This has the effect of being stored in

Furthermore, since a single mercury coating device can supply coated mercury particles to each exhaust head without providing a mercury coating device for each exhaust head, variations in the amount of mercury sealed in each lamp tube can be minimized. It is something.

In addition, since the funnel-shaped part is rotatably provided in the mercury particle coater body, if the mercury particles are dropped onto the slope of the funnel-shaped part while rotating the funnel-shaped part, the mercury particles will be dropped onto the slope of the funnel-shaped part. The powder falls onto different locations on the slope and also rolls down the slope of the funnel in a spiral manner, ensuring that the surface of the mercury grains is sufficiently and reliably coated with powder.

Therefore, if this device is used, a specified amount of mercury measured by a measuring device can be sealed in the lamp tube, and there is no variation in the amount of mercury in each lamp tube, which is very excellent in practice.

[Brief explanation of the drawing]

The figure is a schematic sectional view showing one embodiment of the present invention. 1 is a mercury particle coating device body, 2 is a mercury guide (hole), 3 is a funnel-shaped portion, 7 is a powder feeder, 14 is a mercury meter, and 17 is a mercury dropping device (exhaust head).

Claims (1)

[Claims] 1. A funnel-shaped part that is rotatably provided on the mercury grain coater body that has a mercury guiding part, and a slope of which is coated with chemically stable powder, and a mercury-shaped part that is provided opposite to the inner edge of this funnel-shaped part. A mercury filling device for a tube comprising a measuring device and a mercury dripping device installed opposite to the mercury guide section.