JPH0546050B2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to an ultra-high pressure mercury lamp.

[Summary of the invention]

The present invention relates to an ultra-high-pressure mercury lamp, in which a cylindrical holder is fluid-tightly fitted to one end of an ultra-high-pressure mercury lamp body approximately concentrically with the ultra-high-pressure mercury lamp body, and this cylindrical holder has a ring-shaped recess on its outer periphery. and a liquid-tight seal ring having elasticity is fitted in the ring-shaped recess, and a tightening means is fitted to hold the seal ring in the ring-shaped recess. The tightening means is provided with a reference surface that is substantially perpendicular to the axis of the cylindrical holder, and furthermore, the tightening means is held liquid-tightly with respect to the cylindrical holder by the liquid-tight seal ring and has a microscopic It is a swinging device, and by doing so, it is possible to correct the eccentricity between the ultra-high pressure mercury lamp body and the holder part when installing this ultra-high pressure mercury lamp in a lamp house, etc.
This is intended to avoid accidents such as damage due to distortion of the mercury lamp body due to eccentricity.

[Conventional technology]

The structure of a conventional ultra-high pressure mercury lamp and the manner in which it is attached to a water-cooled lamp house will be explained with reference to FIG.

41 indicates an ultra-high pressure mercury lamp as a whole. In the ultra-high pressure mercury lamp 41, electrodes 42 and 43 are disposed at both ends of the glass tube, facing each other along the tube axis direction, and terminal portions 44 and 45 are electrically led out from these electrodes 42 and 43 to the outside. Become. A cylindrical holder 47 is liquid-tightly fitted and bonded to one end of the ultra-high pressure mercury lamp body 46.

The holder 47 is made of a ceramic cylindrical body or a metal cylindrical body with a ceramic interposed therebetween, and is electrically insulated from the terminal portion of the mercury lamp body 46, and has a flange 48 formed integrally with the mercury lamp body 46 on its outer periphery. A reference surface 49 is formed on this flange 48 and is perpendicular to the axis of the holder 47 .

On the other hand, the ultra-high pressure mercury lamp 41 is equipped with a water-cooled lamp house 5, for example, which is equipped with a cooling means to prevent damage caused by heat generated during operation.
Placed within 0. A receiving part 51 is provided at one end of the lamp house 50 to electrically and mechanically receive the terminal part 45 of the mercury lamp 46 on the opposite side to the side on which the holder 47 is disposed, and the other end is provided with a receiving part 51 that electrically and mechanically receives the terminal part 45 of the mercury lamp 46 on the opposite side to the side where the holder 47 is disposed. A holding part 52 for holding 46 holders 47 is provided.

A spring 53 is disposed in the receiving part 51 to elastically hold the mercury lamp 46 in the tube axis direction in cooperation with the holding part 52 to hold the mercury lamp 46 on the axis of the lamp house 50. Ru.

The flange 48 of the holder 47 is attached to the holding part 52.
A reference surface 55 that abuts against the reference surface 49 of the lamp via an O-ring 54, for example, is provided so as to be orthogonal to the axis of the lamp house 50. In this way, by holding the reference plane 49 of the flange 48 in a plane perpendicular to the axis of the lamp house 50, the mercury lamp body 46 can be placed on a predetermined line inside the lamp house 50. There is.

However, normally the holder 47 is attached to the mercury lamp body 46.
Since the holder 47 and the mercury lamp body 46 are fixed to each other by adhesive resin, the axis of the holder 47 and the axis of the mercury lamp body 46 do not necessarily align due to contraction of the adhesive when it hardens and expansion and contraction due to temperature changes. Eccentricity may occur. Therefore, as mentioned above, the mercury lamp 4
6 in the lamp house 50, if its position is set by the reference plane 49 of the flange 48, the axis of the mercury lamp body 46 is aligned with the lamp house 5.
A deviation from the zero axis may occur. If you try to forcibly set the mercury lamp 46 in a predetermined position in the lamp house 50 in this state, the glass tube of the mercury lamp 46 or the terminal lead-out portions at both ends of the glass tube will be distorted, and the lamp house 50 of the mercury lamp 46 will be distorted. Damage may occur due to repeated heating and cooling when the mercury lamp 46 is installed inside or when the mercury lamp 46 is blinking.

Furthermore, in practice, even if the flange 48 is integrally formed with the holder 47, the orthogonality between the reference plane 49 and the axis of the holder 47 cannot be highly accurately obtained. A process of polishing and correcting the reference surface 49 is required, resulting in poor productivity.

[Problem to be solved by the invention]

The main purpose of the present invention is to improve the above-mentioned accidents caused by eccentricity between the mercury lamp body and the holder and the deterioration of productivity due to polishing in ultra-high pressure mercury lamps.

[Means to solve the problem]

In the present invention, for example, as shown in a cross-sectional view of the essential parts in FIG. do. This cylindrical holder 2 has
A ring-shaped recess 3 is provided on its outer periphery. With the liquid-tight seal ring 4 having elasticity fitted into the ring-shaped recess 3, a tightening means 56 tightens the seal ring 4 so as to hold the seal ring 4 inside the ring-shaped recess 3. is fitted around the outer periphery of the The tightening means 56 is provided with a reference surface 7 that is substantially perpendicular to the axis of the cylindrical holder 2 . The tightening means 56 is held in a fluid-tight manner by the seal ring 4 with respect to the cylindrical holder 2, and is allowed to swing slightly.

[Effect]

According to the ultra-high pressure mercury lamp according to the present invention described above,
Cylindrical holder 2 provided at one end of the mercury lamp body 1
Since the reference surface 7 can be slightly oscillated, the reference surface 7 can be used as a reference to compensate for eccentricity between the mercury lamp body 1 and the holder 2, and set the lamp at a predetermined position. This makes it possible to avoid the inconvenience of applying unnecessary force to the mercury lamp body, which may lead to damage. Further, since the reference surface 7 does not require very high precision orthogonality with respect to the axis of the cylindrical holder 2, high precision polishing is not required, and productivity can be improved.

〔Example〕

EMBODIMENT OF THE INVENTION Hereinafter, one embodiment of the ultra-high pressure mercury lamp according to the present invention will be described with reference to FIGS. 1 to 3.

In the present invention, a cylindrical holder 2 made of ceramic, for example, is attached to one end of the mercury lamp body 1 by ceramic bond or silicon bond.
It adheres almost concentrically and liquid-tightly. This cylindrical holder 2 is provided with a ring-shaped recess 3 on its outer periphery. This ring-shaped recess 3 has elasticity.
For example, a tightening means 56 is provided for fitting the liquid-tight seal ring 4 made of an O-ring with a circular cross section and tightening it so as to hold it in the ring-shaped recess 3. The tightening means 56 comprises, for example, a flange 5 and a nut 6, each made of metal.
The flange portion 5 passes through the cylindrical holder 2 and has a center hole 8 having an inner diameter slightly larger than the outer diameter of the cylindrical holder 2.
It consists of a cylindrical body having a perforated end plate 9, and a threaded groove is provided on the inner peripheral surface of the cylindrical body. The nut 6 passes through the cylindrical holder 2 and
It has a center hole 8 with an inner diameter slightly larger than the outer diameter of the flange portion 5, and a thread groove is provided on the outer periphery to be screwed into a thread groove on the inner periphery of the flange portion 5. A tapered surface 30 is provided at the inner peripheral shoulder of the center hole 8 inside the end plate 9 of the flange portion 5 and at the inner peripheral shoulder at the tip of the nut 6, so that a seal can be created by tightening the flange 5 and the nut 6. The ring 4 is pressed into the ring-shaped recess 3 to form a liquid-tight seal between the holder 2 and the tightening means 56, and with the elasticity of the seal ring 4,
The axis of the tightening means 56 is maintained so as to be able to swing slightly relative to the axis of the holder 2. Flange 5
The end plate 9 has an angle θ which is perpendicular to the axis of the tightening means 56 and therefore forms an angle θ with the axis of the holder 2.
A reference plane 7 having an angle of 90° is formed in advance.

The ring-shaped recess 3 provided on the outer periphery of the cylindrical holder 2 may have a semicircular cross section as shown in FIG. 2A, or may have a V-shaped cross section, for example, as shown in FIG. 2B. can.

FIG. 3 shows a cross-sectional view of the ultra-high pressure mercury lamp 1 according to the present invention placed inside the water-cooled lamp house 10. In the example shown in FIG. 3, the lamp house 10 is a double structure water-cooled lamp house in which a light-transmitting tube body, for example, a central glass tube body 11 is provided in the center. Tube 1
A mercury lamp 1 is disposed inside the lamp house 1 , and cooling water is fed from a water inlet 13 between, for example, a central glass tube 11 and an outer tube 12 of the lamp house 10 . Cooling water flows along the outer circumferential surface from one end to the other end, and further this cooling water enters the glass tube 11 from the other end side of the central glass tube body 11 and flows toward the one end side. Water is drained from the drain port 14, and the mercury lamp 1 is effectively cooled while eliminating air bubbles from adhering to the glass tube body 11 and the wall surface of the mercury lamp 1. ing.

Also in this example, the lamp house 10
One end of the inner end is provided with a receiving part 16 that electrically and mechanically receives the terminal part 15 on the side opposite to the side on which the holder 2 of the mercury lamp 1 is disposed, and the other end is provided with a receiving part 16 for electrically and mechanically receiving the terminal part 15 of the mercury lamp 1. A holding part 17 is provided to hold it.

A spring 18 is disposed in the receiving part 16 to elastically hold the mercury lamp 1 on the axis of the lamp house 10 in cooperation with the holding part 17 in the direction of the tube axis. .

The holding part 17 includes a cylindrical screw 20 that is liquid-tightly attached to one end of the lamp house 10 through a seal body 19, and a tightening nut 21 that is screwed into the cylindrical screw 20. It consists of The cylindrical screw 20 and the tightening nut 21 each have center holes 22 and 23 with an inner diameter slightly larger than the outer diameter of the holder 2, and the inner end of the center hole 22 of the cylindrical screw 20 is aligned with the reference surface of the flange 5. 7 through the seal body 19, and the inner end surface of the tightening nut 21 abuts against the surface of the flange 5 opposite to the reference surface 7, so that the cylindrical screw 20 is tightened. The flange 5, that is, the holder 2 is held by screwing the nut 21. In this way, the mercury lamp 1 is held on the axis within the central glass tube of the lamp house 10 by the cooperation of the receiving part 16 and the holding part 17. In this case, the axis of the mercury body and
Even if there is some eccentricity in the axis with respect to the holder 2, the flange 5 is in a state where it can slightly swing relative to the holder 2, so unnecessary force is not applied to the mercury lamp 1 body. Ru.

Note that in the above example, the lamp house 10
Although the case has been described in which the lamp house has a double-layer water-cooled structure, it can be used in various ways, such as being applicable to a single-layer water-cooled lamp house as shown in FIG.

〔Effect of the invention〕

As described above, according to the ultra-high pressure mercury lamp according to the present invention, the cylindrical holder 2 provided at one end of the mercury lamp body 1 can be slightly oscillated, so that, for example, the mercury lamp can be moved using this reference plane 7 as a reference. 1
It is possible to compensate for the eccentricity between the holder 2 and the holder 2, and to set it at a predetermined position. As a result, it is possible to avoid the inconvenience of applying unnecessary force to the mercury lamp body, which may lead to breakage accidents. Since high-precision polishing is not required, productivity can be improved.

[Brief explanation of the drawing]

Figure 1 is a sectional view showing the main parts of an ultra-high pressure mercury lamp.
Figures 2A and B are side views of the ring-shaped recess;
The figure is a cross-sectional view showing how an ultra-high pressure mercury lamp is attached to a lamp house, and FIG. 4 is a cross-sectional view showing a conventional ultra-high pressure mercury lamp. 1 is an ultra-high pressure mercury lamp, 2 is a cylindrical holder, 3 is a ring-shaped recess, 4 is a liquid-tight seal ring, 56 is a tightening means, 5 is a flange, 6 is a nut, 7 is a reference surface, 8 is a center hole, and 9 is a End plate, 30 is a tapered surface,
10 is a lamp house, 11 is a central glass tube body, 1
2 is an outer glass tube body, 13 is a water inlet, 14 is a drain port, 15 is a terminal part, 16 is a receiving part, 17 is a holding part, 18 is a spring, 19 is a sealing body, 20 is a cylindrical screw, 21 is a tightening part Nut, 22 and 23 are center holes, 41 is the entire ultra-high pressure mercury lamp, 42 and 43 are electrodes, 44 and 45 are terminal parts, 46 is the ultra-high pressure mercury lamp body, 47 is a holder, 48 is a flange, 49 is a reference surface, 50 is the lamp house, 51 is the receiving part, 5
2 is a holding part, 53 is a spring, 54 is an O-ring, 55
is the reference plane.

Claims (1)

[Claims] 1. A cylindrical holder is fluid-tightly fitted to one end of the ultra-high pressure mercury lamp body approximately concentrically with the ultra-high pressure mercury lamp body, and the cylindrical holder has a ring-shaped recess on its outer periphery. is provided on the outer periphery of the cylindrical holder, and tightening means is provided on the outer periphery of the cylindrical holder to hold the seal ring in the ring-shaped recess while the elastic liquid-tight seal ring is fitted into the ring-shaped recess. The tightening means is provided with a reference surface substantially perpendicular to the axis of the cylindrical holder, and the tightening means is held liquid-tight with respect to the cylindrical holder by the liquid-tight seal ring. An ultra-high-pressure mercury lamp that is characterized by being made to slightly oscillate as it moves.