JP4431261B2 - Illumination lamp for use in illuminator for observation in cryogenic bath - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an illumination lamp of an illuminating device for observation in a low-temperature tank that is used by being inserted into the tank when observing the internal state of a low-temperature tank such as an LNG tank.
[0002]
[Prior art]
Large-scale facilities built on the basis of expensive capital investment, such as underground storage tanks that store LNG, need to be properly managed to extend their life. For this purpose, it is necessary to evaluate not only the exterior of the storage tank but also the internal state of the storage tank to evaluate the soundness of the equipment.
[0003]
Conventionally, this type of observation device is generally composed of a photographing device equipped with a TV camera or the like, an illumination device, and a housing that accommodates these, and this housing has a cylindrical opening provided at the ceiling of the cryostat. For the convenience of insertion into the tank through the nozzle part having a, it has a configuration having a cylindrical outer shape.
[0004]
In such an observation device in the cryostat, the observation device and the illumination device for observation are integrally configured, and illumination switching means for adjusting the irradiation angle of the illumination device and the like inside the observation device Etc. are housed, the entire observation apparatus becomes large and heavy, and there is a problem that handling properties are lacking.
[0005]
Conventionally, in order to solve this problem, the illuminating device is separated from the observation device to improve the handling property as a separate body, and this is inserted separately from the insertion port different from the observation device, and the side wall in the tank and A cylindrical illumination device as shown in FIG. 8 that illuminates the bottom surface has been proposed.
[0006]
FIG. 8 is a conceptual diagram showing the structure of this cylindrical illumination device. Here, the cylindrical illumination device 1 includes a linear rod-shaped lamp 3 on a cylindrical axis in a cylindrical housing 2 indicated by a broken line. Are arranged in parallel. Here, 3a is a filament in the rod-shaped lamp 3, 4 is a socket to which a terminal 3b of the rod-shaped lamp is connected, and 5 is a wiring of each lamp.
[0007]
Moreover, as a light source of the above illuminating device 1, the halogen lamp as described in Unexamined-Japanese-Patent No. 11-126512 is used, for example.
FIG. 9 shows an example of this type of halogen lamp. Generally, in the halogen lamp, when the surface temperature is lowered, the activity of the halogen cycle is lowered and the luminance is lowered. Therefore, in order to maintain the surface temperature, a plurality of halogen lamps 6 are stored in a common container 7; A low temperature resistant hose 8 is connected to the container to supply nitrogen gas continuously.
[0008]
[Problems to be solved by the invention]
By the way, in the cylindrical lighting device 1 shown in FIG. 8, the rod-shaped lamps 3 are arranged in parallel on the cylindrical shaft at predetermined intervals. An interval e for removing the lamp is provided between the tip of the lamp 3 and the back surface of the adjacent socket 4 (or socket support member), and this interval e needs to be set larger than the connection length of the terminal 3b of the rod-shaped lamp 3. There is.
For this reason, when arranging a plurality of rod-shaped lamps 3 in a straight line, if the interval e is increased, the overall length L of the lighting device increases as the number of the rod-shaped lamps 3 arranged increases, and the size of the device increases. There is a problem of increasing the weight.
[0009]
On the other hand, in the case of the prior art using the halogen lamp shown in FIG. 9 as the light source, since the plurality of halogen lamps 6 are installed in the common container 7, the arrangement of the plurality of halogen lamps is restricted and the illumination range is limited. There is a problem of end.
In addition, it is necessary to draw the low temperature resistant hose 8 for supplying nitrogen gas from the outside of the tank to the lighting device, which causes a problem in terms of space.
[0010]
In order to solve such a problem, an illuminating device as described in Japanese Patent Laid-Open No. 11-126512 has been proposed. This is because an individual halogen lamp 6 is housed in an airtight container and this airtight container is used. The inside is filled with an inert gas such as nitrogen gas.
According to this, although there is an advantage by providing the containers individually, in the lighting device having a plurality of halogen lamps, the number of containers increases, the space and weight occupied by the containers increase, and the size of the apparatus increases. However, there is a problem that the handling property becomes worse due to the increase in weight.
[0011]
The present invention has been proposed in order to cope with the above-described problems, and in consideration of handling properties, the photographing device and the lighting device are separated into two bodies, and the lighting device is configured to be inserted into the tank alone. However, it is a first object of the present invention to provide an illumination lamp for use in an illuminating device for observation in a low-temperature chamber that can achieve a reduction in size and weight.
[0012]
A second object of the present invention is to provide an illumination lamp used in a low-temperature observing illumination device having a novel configuration that can withstand use in a low-temperature atmosphere as a halogen lamp.
[0013]
[Means for Solving the Problems]
In order to achieve the first and second objects described above, the present invention is characterized in that it is constituted by the inventions described in claims 1 and 2 below.
[0014]
The first invention described in claim 1 is an illuminating device that is inserted into a tank through a nozzle portion provided in a ceiling portion of the low-temperature tank in order to observe the inside of the low-temperature tank. A plurality of linear frames arranged in the cylindrical axis direction along the outer peripheral edge to form a cylindrical housing, and a plurality of linear frames supported by the linear frame and arranged at predetermined intervals in the cylindrical axis direction Socket support portion and a rod-shaped lamp provided in parallel on the cylindrical axis between the socket support portions. This rod-shaped lamp is connected to the socket provided in the socket support portion and is built in the glass tube. The filament is made up of a plurality of filaments connected in a straight line.
[0015]
According to the above feature, since the illumination device is in an independent form with respect to the observation device, it is possible to reduce the size and weight of the device and improve the handleability. Since it has a configuration including a plurality of filaments linearly connected to the inside thereof, it is possible to reduce the number of rod-shaped lamps arranged to obtain the same level of brightness, and accordingly, the length of the socket and There is an advantage that the entire length L of the lighting device can be shortened by the length of the lamp removal interval e.
[0016]
According to a second aspect of the present invention, the rod-shaped lamp is a halogen lamp, the structure of which is the first glass in which a linear filament is incorporated and a halogen substance is enclosed with an inert gas. It is characterized by comprising a tube and a second glass tube surrounding the first glass tube so as to form a heat insulation space on the outer periphery of the first glass tube.
[0017]
According to the above feature, the glass tube of the halogen lamp is a double tube, the halogen cycle is performed in the first glass tube, and the heat insulation space is formed on the outer periphery by the second glass tube. The lamp can be lit in a healthy state with no decrease in the halogen cycle even underneath.
[0018]
In addition, the heat insulation space surrounded by the first glass tube and the second glass tube is filled with a gas having a vacuum or appropriate pressure according to the use environment, and the lamp needs to be covered with a special airtight container. Therefore, an illumination lamp for observation in a low-temperature chamber that can be inserted into a nozzle portion having a small diameter is obtained.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is an explanatory diagram showing the overall configuration of a cryogenic chamber observation illumination apparatus according to an embodiment of the present invention.
The illuminating device indicated by reference numeral 10 has a substantially cylindrical housing shape as indicated by a broken line, and has a cylindrical opening provided in a ceiling portion of an LNG tank (low temperature tank) shown in FIG. It is inserted from the part 51 and is suspended by the cable 20 extending upward to illuminate the side and the lower side in the tank.
[0020]
In the illuminating device 10 shown in FIG. 1, the members constituting the cylindrical housing include a conical upper housing 11 and a plurality of small diameters arranged in the cylindrical axis direction along the cylindrical outer peripheral edge. And a plurality of socket support portions 13 and 13 ′ that are supported by the linear frame 12 and arranged at predetermined intervals in the cylindrical axis direction. It is. A socket 14 is supported on each of the socket support portions 13, and a side lamp 15 as a rod-shaped lamp referred to in this specification is connected to the socket 14, and the socket support portion 13 ′ at the lowermost end is connected to the socket support portion 13. A downward lamp 16 is connected to the supported socket 14 '.
[0021]
FIG. 2 is an explanatory view showing an enlarged portion of the side lamp 15 as a rod-shaped lamp. The side lamp 15 connects a terminal 17 provided at a base end portion thereof to the socket 14. In use, they are arranged in parallel on the cylindrical shaft.
[0022]
This side lamp 15 uses a halogen lamp, and a plurality of filaments 15a (two in FIG. 2) are arranged inside a cylindrical glass tube, and are arranged linearly along the axial direction of the glass tube. is doing.
The filament 15 a is a linear body made of a material such as tungsten, and is formed in a coil shape. The filament 15 a is connected in parallel by a linear wiring and connected to the terminal 17.
[0023]
At this time, the distance e between the tip of the side lamp 15 and the back surface of the adjacent socket support portion 13 needs to be secured in order to attach and detach the side lamp 15, but as shown in FIG. By making the direction lamp 15 into a long rod-shaped lamp provided with a plurality (two) of filaments 15a, the number of side lamps 15 required to obtain a desired brightness can be reduced. Accordingly, it is possible to avoid the lengthening of the entire length of the illumination device (see reference symbol L in FIG. 7) by providing the interval e as much as possible.
[0024]
However, when such a lamp is used, there is a concern about disconnection due to thermal expansion in the wiring around the immediate disconnection fuse due to an increase in the amount of heat generated per lamp. Take. Moreover, the measure of avoiding simultaneous non-lighting of a plurality of filaments is taken by connecting the wires of the filaments 15a in parallel.
[0025]
FIG. 3 is a cross-sectional view taken along the line AA in FIG. 2 and shows a state in which the wiring 18 of the side lamp 15 and the lower lamp 16 is provided inside the linear frame 12.
The wiring 18 is overheat-protected with a heat-resistant electric wire or a heat-resistant tube or the like as a countermeasure against heating and burnout due to heat generated by the lamp, thereby reducing the distance e ′ between the wiring 18 and the lamp 15 as much as possible. Yes. Therefore, according to this, the inside of the linear frame 12 can be designed with high density, and the outer diameter of the apparatus can be reduced.
[0026]
FIG. 4 is an explanatory view showing a cylindrical halogen lamp as a second embodiment of the side lamp 15 (or the lower lamp 16) in the lighting device 10 described above.
[0027]
The lamp 15 is a cylindrical halogen lamp having a connection terminal 17 on the base end side, and includes a first quartz glass tube 15a, a second quartz glass tube 15b, a filament 15c, and a support portion 15d. It is configured.
[0028]
A linear filament 15c is built in the first quartz glass tube 15a along the cylindrical axis direction, and a halogen substance is sealed together with an inert gas therein.
A second quartz glass tube 15b that covers the first quartz glass tube 15a is provided on the outer periphery of the first quartz glass tube 15a to form a heat insulating space.
At this time, the space between the first quartz glass tube 15a and the second quartz glass tube 15b may be in a vacuum state or filled with a gas having an appropriate pressure depending on the use environment. Also good. According to the experiment by the inventors, it has been confirmed that the halogen lamp functions normally when nitrogen gas (N2) is filled at a pressure of about 700 mmHg in the environment of LNG and LNG.
[0029]
FIG. 5 shows another embodiment of the cylindrical halogen lamp shown in FIG. 4. In this embodiment, two linear filaments 15c are provided in the first quartz glass tube 15a in the axial direction of the glass tube. The first quartz glass tube 15a is enclosed in a straight line, the inside of the first quartz glass tube 15a is filled with a halogen substance together with an inert gas, and a heat insulating space is formed on the outer periphery of the first quartz glass tube 15a. The second quartz glass tube 15b is preferably provided in the same manner as the previous example.
[0030]
Next, the usage form of the illuminating device for observation in a low-temperature tank to which the present invention is applied will be described with reference to FIGS.
FIG. 6 is an explanatory view showing an outline of an observation device used together with the illumination device 10 of the present invention, and the observation device 30 has a cylindrical housing shape like the illumination device 10, and will be described later. 7 is inserted from a nozzle part 52 having a cylindrical opening provided in the ceiling part of the LNG tank (low temperature tank) shown in Fig. 7 and suspended by a cable 40 extending upward to observe the side and the lower side in the tank. It is.
[0031]
This observation apparatus 30 includes a vacuum heat insulating container 30a whose inside is kept at room temperature even in a low-temperature bath and an exposed part 30b which is always exposed to a low temperature during use. The inside of the vacuum heat insulating container 30a is always kept at 0 to 40 ° C. by temperature control by a heat insulating layer and a sheet heater, and a high-sensitivity CCD camera 31 and a small and high magnification optical zoom lens 32 are lighted therein. It is deployed with its axis aligned with the cylindrical axis. Further, the mechanism unit, the motor, and the like are provided in the exposure unit 30b, and these are individually manufactured to a low temperature specification.
[0032]
A side-view head 34 equipped with a side-view mirror 34a is detachably provided in front of the distal end window 33 in the vacuum heat insulating container 30a. Thus, when observing the side wall in the cryostat, the side-viewing head 34 is attached, and the tilting operation of the side-viewing head 34 can observe a range from 10 degrees above to 30 degrees below the horizontal direction. In addition, the entire circumference of the side wall can be observed by rotating the side-viewing head 34 by 360 degrees or more.
Further, the side view head 34 is removed and inserted into a low temperature tank so that the bottom surface of the tank can be directly observed.
[0033]
FIG. 7 shows a situation in which the inside of the LNG underground storage tank 50 is observed. In the storage tank 50 which is a low temperature tank, the nozzle portions 51 and 52 are provided on the ceiling portion as described above. The observation device 30 and the illumination device 10 are inserted, and the inside is observed while being suspended by the cables 40 and 30.
The observation device 30 and the illumination device 10 are adjusted in height while the cables 40 and 20 are pulled manually, and the cables 40 and 20 are wound around the cable storage base 54 from the nozzle portions 52 and 51 via the cable fixing device 53. Is taken and connected to the control device 55. In the control device 55, operation and state monitoring of each function of the illumination device 10 and the observation device 30 are performed.
[0034]
According to the embodiment having the above-described configuration, since the illumination device 10 and the observation device 30 are formed separately, the handling property is improved by reducing the size and weight of each.
And the structure of the illuminating device 10 is only a simple skeleton member such as the upper housing 11, the linear frame 12, and the socket support portion 13, and does not include a complicated mechanism, so that the structure can be sufficiently reduced in size and weight. Become.
[0035]
【The invention's effect】
According to the invention described in claim 1, the side lamp 15 and the lower lamp 16 as rod-shaped lamps in the lighting device 10 are provided with a plurality of filaments connected linearly therein. Compared to the case where a plurality of rod-shaped lamps each having one socket are arranged for one filament, the overall length of the lighting device can be shortened, and further, the number of wirings can be reduced by reducing the number of sockets. The inside of the apparatus can be formed with high density, and the outer diameter of the apparatus can be reduced.
[0036]
According to the second aspect of the present invention, the side lamp 15 and the lower lamp 16 as rod-shaped lamps in the lighting device 10 are provided with the second quartz glass tube 15b covering the first quartz glass tube 15a. Since the first quartz glass tube 15a in which the halogen cycle is performed is thermally insulated by the double tube structure, the halogen cycle does not deteriorate even in a low temperature environment, and the use is sound in an exposed state. This makes it possible to reduce the diameter of the device and reduce the size and weight.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram showing the overall configuration of a lighting apparatus for observation in a cryogenic bath that is one embodiment of the present invention.
FIG. 2 is an explanatory diagram showing a first example of a side lamp used in the lighting device of the embodiment.
3 is a cross-sectional view taken along line AA in FIG.
4 is an explanatory view showing a second example of a side lamp used in the lighting device of the embodiment of FIG. 1; FIG.
5 is an explanatory view showing another embodiment of the side lamp shown in FIG. 4. FIG.
FIG. 6 is an explanatory diagram showing an outline of an observation apparatus used together with the illumination apparatus of the present invention.
FIG. 7 is an explanatory diagram showing a use state of the present invention.
FIG. 8 is an explanatory view showing an example of a conventional lighting device (bar lamp).
FIG. 9 is an explanatory view showing an example of a conventional lighting device (halogen lamp).
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Illuminating device 11 Upper housing | casing 12 Linear frame 13, 13 'Socket support part 14, 14' Socket 15 Side lamp 15a Filament 15b First quartz glass tube 15c Second quartz glass tube 15d Linear filament 16 Below Lamp 17 Terminal 18 Wiring 20 Cable 30 Observation device 30a Vacuum heat insulating container 30b Exposed part 31 CCD camera 32 Zoom lens 33 Front window 34 Side view head 34a Side view mirror 40 Cable 50 LNG underground storage tank 51, 52 Nozzle part 53 Cable Fixing device 54 Cable storage base 55 Control device

Claims (2)

An illuminating device that is inserted into a tank through a nozzle provided in a ceiling of the low-temperature tank to observe the inside of the low-temperature tank,
The lighting device includes a plurality of linear frames arranged in a cylindrical axis direction along an outer peripheral edge to form a cylindrical casing, and is supported by the linear frame at predetermined intervals in the cylindrical axis direction. A plurality of socket support portions disposed, and a rod-shaped lamp provided in parallel on a cylindrical axis between the socket support portions;
The rod-shaped lamp is an illuminating device for observation in a cryogenic bath, wherein a filament connected to a socket provided in the socket support portion and built in a glass tube is composed of a plurality of filaments connected in a straight line. Lighting lamp used. An illuminating device that is inserted into a tank through a nozzle provided in a ceiling of the low-temperature tank to observe the inside of the low-temperature tank,
The lighting device includes a plurality of linear frames arranged in a cylindrical axis direction along an outer peripheral edge to form a cylindrical casing, and is supported by the linear frame at predetermined intervals in the cylindrical axis direction. A plurality of socket support portions disposed, and a rod-shaped lamp provided in parallel on a cylindrical axis between the socket support portions;
The rod-shaped lamp includes a first glass tube in which a linear filament is incorporated and a halogen substance is enclosed together with an inert gas, and a first heat insulating space is formed on the outer periphery of the first glass tube. An illumination lamp for use in an illuminating device for observation in a low-temperature chamber, wherein a halogen lamp is composed of a second glass tube surrounding an outer periphery of the glass tube.

Images