JP2005150003A - Explosion-proof lighting apparatus and explosion-proof lighting system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an explosion-proof lighting apparatus and an explosion-proof lighting system wherein generation of ignition source for igniting the inflammable gas flowed into the explosion-proof lighting apparatus is prevented, and the structure of at least the portion where the lighting device is installed is constituted of a safety-increased explosion-proof structure, and simplicity and low cost is realized. <P>SOLUTION: In the explosion-proof lighting apparatus 10, when a prescribed DC voltage is supplied from a power supply part through an electric cable 203, electric power is supplied to a lighting part 300 adopting a lamp structure through the electric cable 103. When power is supplied to the lighting part 300, an LED lamp 311 emits light. And the light emitted from the LED lamp 311 is diffused by an optical diffusing plate 314 and passes through a light transmission part 104 and is irradiated outside. Since the lighting part 300 having the LED lamp 311 is made a structure electrically insulated from the outside, the structure is simplified. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to, for example, an explosion-proof luminaire installed in a passage or the like where a pipe for pumping a combustible gas or a liquid that becomes a combustible gas when vaporized is installed, and in particular, includes an LED (light emitting diode) as a light source. The present invention relates to an explosion-proof lighting apparatus and an explosion-proof lighting system.

  In recent years, technologies of various lighting devices using LEDs (light emitting diodes) as light sources have been disclosed (for example, see Patent Document 1). For example, there is a case where a conventional lighting device using an LED as a light source is used for an explosion-proof lighting fixture installed in a passage or the like where a pipe for pumping a combustible gas or a liquid that becomes a combustible gas when vaporized is installed. In this case, the combustible gas that has flowed into the explosion-proof lighting fixture ignites due to, for example, the surface temperature of semiconductors, relays, resistors, etc., or the short circuit pattern of the circuit board on which the LEDs are installed. Because of the possibility of explosion, the explosion-proof lighting fixture had to adopt a flameproof structure.

In this explosion-proof structure, even if an explosion occurs in the explosion-proof lighting fixture, in order to suppress a rapid increase in internal pressure in the explosion-proof lighting fixture, for example, between the body of the explosion-proof lighting fixture and the lid The pressure release portion (ski) formed by the surface roughness of each contact surface was formed. Furthermore, in the explosion-proof construction, in order to lower the temperature of the combustion gas that is expelled to the outside from the explosion-proof lighting fixture due to the explosion, the creepage distance of the pressure relief part is reduced. It was necessary to increase the size of the proofing lamp so that heat was sufficiently transferred to the explosion-proof lighting fixture.
JP 2001-147657 A

  In the above-described conventional explosion-proof lighting fixture that employs the explosion-proof construction, the wall portion of the explosion-proof lighting fixture is thick, increases in weight, and increases production costs. In addition, in a conventional lighting device using an LED as a light source, for example, a surface temperature of a semiconductor, a relay, a resistor, or the like, a short circuit pattern of a circuit board on which the LED is installed, etc. There was a problem that the combustible gas that flowed in ignited and exploded.

  Here, in the lighting device using an LED as a light source, if the generation of an ignition source that is ignited by the combustible gas that has flowed into the explosion-proof lighting fixture can be prevented, at least the structure of the portion where the lighting device is installed has a pressure resistance. Instead of the explosion-proof structure, a safety-explosion-proof structure that is simpler than the explosion-proof structure and can reduce production costs can be employed. This safety explosion-proof structure is applied only to electrical equipment that does not act as an ignition source during normal operation, and is a structure that enhances safety against danger due to temperature rise and external damage, The structure is simpler than the flameproof structure.

  Therefore, in the present invention, in order to solve the above-described problems, it is possible to prevent the generation of an ignition source that ignites the combustible gas flowing into the explosion-proof lighting fixture, and at least the lighting device is installed. To provide an explosion-proof lighting device and an explosion-proof lighting system that can constitute an explosion-proof lighting device with a safety-explosion-proof structure of the part, can consume less power, and can be reduced in size, simplified, and reduced in cost. Objective.

  An explosion-proof lighting fixture according to claim 1 is a sealed fixture housing having a light transmission window on at least one surface; and is disposed in the fixture housing so as to face the light transmission window, and at least an LED is disposed as a light source. An illuminating device hermetically sealed so as to cover a base material to be provided with an electrical insulating member; a power supply connecting portion having one end connected to the base material and protruding from the illuminating device through the electrical insulating member; An electric cable branch case for introducing power, which is a projecting and sealed casing on one surface; a main electric cable disposed in an airtight manner through the electric cable branch case; A branch electric cable that branches off from the main electric cable in a cable branch case and that hermetically penetrates the appliance case and is connected to the lighting device.

  According to the explosion-proof lighting fixture of the first aspect, the lighting device is covered and sealed with the electrical insulating member, can adopt a so-called lamp structure, and can be electrically insulated from the outside. Thus, for example, even if a short circuit or the like occurs in the base material on which the LED as the light source is disposed, it does not affect the outside. For example, an explosion of combustible gas in the explosion-proof lighting fixture Etc. can be prevented. In addition, the fixture housing in which the lighting device is installed can be configured with a safety explosion-proof structure, and the explosion-proof lighting fixture can be reduced in weight, size, and cost.

  Further, in the lighting device, power can be supplied to the lighting device by fitting a power connection portion such as a power supply pin into an electric socket or the like. By adopting such a so-called lamp structure, it is possible to easily install or replace the lighting device. Furthermore, by using the LED as the light source, the power consumed by the explosion-proof lighting apparatus can be greatly reduced.

  Moreover, the instrument housing | casing and electric cable branch housing | casing which comprise an explosion-proof lighting fixture are comprised, for example by aluminum, copper, etc. which do not produce a spark etc. by contact, for example. Further, at least one LED is disposed as a light source of the illumination device, and this light source is disposed on, for example, a printed board. Moreover, you may make it the structure which integrated several LED. Further, for example, a reflector or an optical lens may be provided in the lighting device so that the light from the LED is directed to the light transmission window. Further, the light transmission window transmits light emitted from the LED and irradiates the light to the outside, and is made of, for example, tempered glass. The light transmission window is preferably made of a material having a high transmittance with respect to light having a wavelength emitted from the LED.

  The explosion-proof lighting fixture according to claim 2 is the explosion-proof lighting fixture according to claim 1, wherein the explosion-proof lighting fixture is installed facing the light emission side surface or the light transmission window of the light source, and diffuses the light emitted from the light source. Further comprising a plate.

  According to the explosion-proof lighting fixture of the second aspect, by providing the light diffusing plate, the light irradiated to the outside is diffused, so that the irradiation area can be expanded. This light diffusion plate diffuses the light emitted from the LED provided in the illumination device and irradiates light over a wider area, and is composed of, for example, a prism, a concave lens, a material with high diffusivity, etc. Is done. Moreover, it is preferable that a light diffusing plate is comprised with the material with a high transmittance | permeability with respect to the light of the wavelength radiate | emitted from LED. Further, when the light diffusing plate is installed facing the light emitting side surface, the influence of the surface temperature of the light source is not given to the outside, and safety can be enhanced.

  The explosion-proof lighting system according to claim 3 is a sealed appliance housing having a light transmission window on at least one surface; and disposed in the appliance housing opposite to the light transmission window, and at least an LED is disposed as a light source. An illuminating device hermetically sealed so as to cover a base material to be provided with an electrical insulating member; a power supply connecting portion having one end connected to the base material and protruding from the illuminating device through the electrical insulating member; An electric cable branch case for introducing power, which is a projecting and sealed casing on one surface; a main electric cable disposed in an airtight manner through the electric cable branch case; A plurality of explosion-proof luminaires branching from the main electrical cable in a cable branch housing and penetrating the fixture housing in an airtight manner and connected to the lighting device. A group of connected explosion-proof luminaires; provided in a flameproof enclosure, rectifies an AC voltage supplied from a supply power source into a DC voltage, and supplies a plurality of voltages of a predetermined value via the main electric cable. And a power supply unit for supplying to the explosion-proof lighting apparatus.

  According to the explosion-proof lighting system of the third aspect, the lighting device is covered and sealed with an electrical insulating member, can adopt a so-called lamp structure, and can be electrically insulated from the outside. Thus, for example, even if a short circuit or the like occurs in the base material on which the LED as the light source is disposed, it does not affect the outside. For example, an explosion of combustible gas in the explosion-proof lighting fixture Etc. can be prevented. In addition, the fixture housing in which the lighting device is installed can be configured with a safety explosion-proof structure, and the explosion-proof lighting fixture can be reduced in weight, size, and cost.

  Moreover, by using the LED as the light source, the power consumed by the explosion-proof lighting apparatus can be greatly reduced. In addition, since the power consumption of each explosion-proof lighting fixture is small, the voltage drop in the main electric cable is very small, and it is suitable for installation as an explosion-proof lighting fixture in a tunnel or tunnel, for example, using a relatively long main electric cable. .

  Furthermore, as a power supply unit, for example, even if the supplied AC voltage fluctuates in the range of 100 to 240V, the output is rectified and adjusted, and for example, a constant output of DC voltage 100V is supplied to the main electrical cable. A power supply device that can be used is used.

  According to the explosion-proof lighting fixture of the first aspect, the lighting device is covered and sealed with the electrical insulating member, can adopt a so-called lamp structure, and can be electrically insulated from the outside. Thus, for example, even if a short circuit or the like occurs in the base material on which the LED as the light source is disposed, it does not affect the outside. For example, an explosion of combustible gas in the explosion-proof lighting fixture Etc. can be prevented. In addition, the fixture housing in which the lighting device is installed can be configured with a safety explosion-proof structure, and the explosion-proof lighting fixture can be reduced in weight, size, and cost.

  According to the explosion-proof lighting fixture of the second aspect, by providing the light diffusing plate, the light irradiated to the outside is diffused, so that the irradiation area can be expanded. Further, when the light diffusing plate is installed facing the light emitting side surface, the influence of the surface temperature of the light source is not given to the outside, and safety can be enhanced.

  According to the explosion-proof lighting system of the third aspect, the lighting device is covered and sealed with an electrical insulating member, can adopt a so-called lamp structure, and can be electrically insulated from the outside. Thus, for example, even if a short circuit or the like occurs in the base material on which the LED as the light source is disposed, it does not affect the outside. For example, an explosion of combustible gas in the explosion-proof lighting fixture Etc. can be prevented. In addition, the fixture housing in which the lighting device is installed can be configured with a safety explosion-proof structure, and the explosion-proof lighting fixture can be reduced in weight, size, and cost. Moreover, by using the LED as the light source, the power consumed by the explosion-proof lighting apparatus can be greatly reduced. In addition, since the power consumption of each explosion-proof lighting fixture is small, the voltage drop in the main electric cable is very small, and it is suitable for installation as an explosion-proof lighting fixture in a tunnel or tunnel, for example, using a relatively long main electric cable. .

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 is a plan view showing the front of an explosion-proof lighting apparatus 10 according to an embodiment of the present invention. FIG. 2 is a diagram showing a part of the AA cross section of FIG. FIG. 3 is a view showing a BB cross section of FIG.

  The explosion-proof lighting device 10 is installed and used on a wall surface such as a sinus where a pipe for pumping a combustible gas or a liquid that becomes a combustible gas when vaporized is installed, for example.

  As shown in FIGS. 1 to 3, an explosion-proof lighting device 10 includes a device body 100 that functions as a device housing, a cable branch body 200 that is connected to the device body 100 and functions as an electrical cable branch housing, and a lighting device. It is mainly comprised by the illumination part 300 which functions as.

First, the configuration of the instrument body 100 will be described.
The instrument main body 100 in which the illumination unit 300 is installed has a safety explosion-proof structure.
The instrument body 100 is a member having a predetermined thickness, one of which is circular and the other of which is rectangular. The instrument body recess 101 is formed with a cylindrical recess having a bottom in one circular portion, and the other rectangle. It is comprised with the penetration part 102 opened so that it might communicate with this instrument main body recessed part 101 from the side.

  The through-hole 102 is formed by through-holes 102a and 102b having two opening diameters, and the diameter of the through-hole 102a communicating with the instrument body recess 101 is smaller than the diameter of the through-hole 102b. . Furthermore, the instrument main body 100 is configured by an instrument main body lid portion 106 for hermetically sealing the instrument main body recess 101 by screwing or the like.

  The explosion-proof lighting device 10 is installed on a wall surface such as a cave where a pipe for pumping a combustible gas or a liquid that becomes a combustible gas when vaporized is installed. The member of the cable branch body 200 is made of, for example, aluminum, copper, or the like that does not generate a spark or the like by contact.

  In the fixture body recess 101, an illumination unit 300 including an LED lamp as a light source, which will be described in detail later, is fixed to an illumination unit fixing plate 350 via a fixing unit 315 provided in the illumination unit 300. This fixing is performed using, for example, a screw. In addition, the lighting unit fixing plate 350 is provided with an electrical socket 360 that fits with a power supply pin 313 that functions as a power supply connection unit of the lighting unit 300. By fitting the power supply pin 313 of the illumination unit 300 into the electrical socket 360, power can be supplied to the illumination unit 300. The installation position of the electric socket 360 can be set as appropriate in accordance with the position of the power supply pin 313 of the illumination unit 300. Moreover, the form of the illumination part 300 shown here is an example, and it is needless to say that the illumination part 300 of another form can be installed.

  Here, it is preferable that the illumination unit fixing plate 350 is formed of an electrically insulating member. The illumination unit fixing plate 350 is fixed to a predetermined position via the inner wall of the instrument body recess 101 and, for example, a support member (not shown).

  The electric cable 103 is electrically connected to the electric socket 360. The other end of the electric cable 103 electrically connected to the electric socket 360 is connected to the instrument main body 100 through the through-hole 102 opened to communicate with the instrument main body recess 101. To be introduced. At this time, a packing 105 is provided in the through hole 102 b having a large diameter of the through part 102, and the electric cable 103 inserted into the through hole 102 b is in contact with the wall part of the through hole 102 b through the packing 105. . Here, the diameter of the through hole 102 a is formed to be slightly larger than the outer diameter of the electric cable 103.

  Moreover, the instrument main body cover part 106 which seals the instrument main body recessed part 101 airtightly by screwing etc. has the rectangular opening part 106a in the center, and also the instrument main body recessed part 101 side of the instrument main body cover part 106 has a recessed part. 106b is formed. The concave portion 106b is fitted with a light transmitting portion 104 made of, for example, tempered glass that transmits light from the LED lamp 311 provided in the instrument main body concave portion 101. The light transmission part 104 is airtightly sandwiched between the instrument main body cover part 106 and the instrument main body recess 101 through packing or the like. In addition, it is preferable that the tempered glass used here is comprised with the material with the high transmittance | permeability with respect to the light of the wavelength radiate | emitted from the LED lamp 311. FIG.

Next, the configuration of the cable branch body 200 will be described.
The cable branch main body 200 is a cable branch main body recess having a bottom portion that accommodates the other end side of the electric cable 103 electrically connected to the electric socket 360 disposed on the lighting unit fixing plate 350 installed in the instrument main body 100. 201 is formed on the surface of the upper surface of the cable branch body 200 that contacts the instrument main body 100. The joint convex part 202 has an outer diameter slightly smaller than the diameter of the through hole 102b of the instrument main body 100. A through-hole 202a communicating with the cable branch main body recess 201 is opened in the joint protrusion 202, and the diameter of the through-hole 202a is slightly larger than the outer diameter of the electric cable 103 inserted into the through-hole 202a. Has been.

  Further, when the upper surface of the joint convex portion 202 is inserted into the through hole 102 b of the instrument main body 100, the packing 105 provided between the inner wall of the through hole 102 b and the side surface of the electric cable 103 is pressed. When the cable branch body 200 is connected to the instrument body 100 by, for example, screwing or the like, the pressing force increases, and the step surface formed at the boundary between the through hole 102b and the through hole 102a The packing 105 sandwiched between the upper surface of the joint projection 202 is deformed. Due to the deformation of the packing 105, the side surface of the electric cable 103 inserted into the through hole 102b and the contact portion with the packing 105 on the inner wall of the through hole 102b are pressed, and the side surface of the electric cable 103 inserted into the through hole 102b and the through hole are penetrated. The space between the inner wall of the hole 102b is sealed, and the inside of the instrument body 100 is sealed.

  In addition, a cable penetrating portion 204 for penetrating the electric cable 203 is provided in a direction perpendicular to the direction in which the electric cable 103 is introduced, on the opposite side of the cable branching body 200 to the joint body 100. ing. Then, the electric cable 203 and the electric cable 103 penetrating the cable penetration part 204 are electrically connected to supply power to the illumination part 300.

  The cable penetration portion 204 is formed by through holes 204 a and 204 b having two opening diameters, similar to the penetration portion 102 provided in the instrument main body 100, and the cable penetration portion 204 communicates with the cable branching body concave portion 201. The diameter is smaller than the diameter of the through hole 204b.

  When the electric cable 203 is introduced into the cable penetrating part 204, a packing 205 is provided in the through hole 204b having a large diameter of the cable penetrating part 204, and the electric cable 203 inserted into the through hole 204b passes through the packing 205. In contact with the wall of the through hole 204b. Here, the diameter of the through hole 204 a is formed to be slightly larger than the outer diameter of the electric cable 203.

  Further, the cable lid portion 206 is formed with a joint convex portion 207 having an outer diameter slightly smaller than the diameter of the through hole 204b on one surface. A penetration portion 207a communicating with the cable branch main body depression 201 is opened in the joint projection 207, and the diameter of the penetration portion 207a is slightly larger than the outer diameter of the electric cable 203 inserted into the penetration portion 207a. Has been.

  When the upper surface of the joint projection 207 is inserted into the through hole 204 b, it presses the packing 205 provided between the inner wall of the through hole 204 b and the side surface of the electric cable 203. When the cable lid portion 206 is connected to the cable branch body 200 by, for example, screwing or the like, the pressing force increases, and the surface of the step portion formed at the boundary between the through hole 204b and the through hole 204a. And the packing 205 sandwiched between the upper surface of the bonding projection 207 is deformed. Due to the deformation of the packing 205, the side surface of the electric cable 203 inserted into the through hole 204b and the contact portion of the inner wall of the through hole 204b with the packing 205 are pressed, and the side surface of the electric cable 203 inserted into the through hole 204b is penetrated. The space between the inner wall of the hole 204b is sealed.

  In addition, the electric cable 203 is connected to the electric cable 103 in the cable branch main body recess 201 by, for example, crimp connection or terminal block connection, and supplies power to the illumination unit 300 via the electric cable 103. Further, when the electric cables 203 are connected to each other, the connecting portion is connected so as to be located in the cable branching body recess 201. After the connection between the electric cable 103 and the electric cable 203, the connection portion is covered with, for example, an electric insulating member. The cable branch main body cover 208 is connected to the cable branch main body recess 201 via a packing or the like, for example, by screwing or the like, and the inside of the cable branch main body 200 is sealed.

  The explosion-proof lighting device 10 is fixed to a wall surface of a cave using a through hole of a connection portion 100a provided on a side surface of the device main body 100.

Next, the illumination unit 300 will be described with reference to FIGS.
First, an exemplary embodiment of the illumination unit 300 will be described with reference to FIGS. Here, FIG. 4 is a perspective view illustrating an appearance of the illumination unit 300, and FIG. 5 is a cross-sectional view of the illumination unit 300.

  4 and 5 includes a printed circuit board 310, an LED lamp 311 electrically connected to the printed circuit board 310 on the printed circuit board 310, the surface of the printed circuit board 310, and the printed circuit board. One end is connected to a part of the circuit of the printed circuit board 310 and the other end protrudes to the outside through the mold part 312. The mold part 312 functions as an electrical insulating member that covers the connection part between the circuit 310 and the LED lamp 311. The two power pins 313 are mainly composed of a light diffusion plate 314 connected to the mold portion 312 so as to cover the LED lamp 311 disposed on the printed circuit board 310. The light diffusing plate 314 can be deleted as necessary.

  In addition, a fixing portion 315 for fixing the lighting unit 300 to the lighting unit fixing plate 350 is provided on the side wall of the lighting unit 300, and a through-hole for penetrating a screw or the like is provided in the fixing unit, for example. Is provided. Here, it is preferable that this fixing | fixed part 315 is comprised with an electrical insulation member.

  The emitted light of the LED lamp 311 electrically connected to the circuit of the printed circuit board 310 on the printed circuit board 310 is preferably white, but is not limited to this emission color, and is appropriately emitted according to the application. Color can be selected. Moreover, it is preferable that the arrangement | sequence of the LED lamp 311 is suitably determined by the installation state in which the explosion-proof lighting fixture 10 is installed, for example, the explosion-proof lighting fixture 10 is in the path of a sinus | pathway in the state shown in FIG. In the case where the LED lamps 311 are installed along the path, the LED lamps 311 are preferably arranged in a direction along the path of the sinus, that is, an arrangement long in the lateral direction as shown in FIG.

  The mold part 312 that functions as an electrically insulating member that covers the surface of the printed circuit board 310 and the connection part between the circuit of the printed circuit board 310 and the LED lamp 311 can be made of, for example, an electrically insulating resin. Since the mold part 312 is sufficiently electrically insulated from the outside, the mold part 312 needs to be molded uniformly with a predetermined thickness or more without any spots.

  The power supply pin 313 whose one end is connected to the circuit of the printed circuit board 310 is made of a conductor, and the penetration portion of the mold portion 312 is hermetically sealed. The power pin 313 is fitted into the electric socket 360 fixed to the illumination unit fixing plate 350, so that power can be supplied to the LED lamp 311 via the printed board 310. The power supply pin 313 fitted in the electric socket 360 is configured such that there is no exposed portion of the power supply pin 313 outside.

  Here, instead of the pin structure like the power supply pin 313, the connection part (base part) may be a screw structure like a general light bulb, for example. In this case, the structure of the electric socket 360 is also a structure corresponding thereto.

  The light diffusing plate 314 provided to cover the light emitting side of the LED lamp 311 diffuses the light emitted from the LED lamp 311 and irradiates the light over a wider area. Consists of prisms, concave lenses, and materials with high diffusivity. The light diffusing plate 314 has a shape in which a concave portion is formed so as to cover the protruding portion of the LED lamp 311 corresponding to the protruding portion of the LED lamp 311, but it may be formed of a flat plate.

  The light diffusing plate 314 is bonded to the mold portion 312 that covers the surface of the printed board 310 and the connection portion between the circuit of the printed board 310 and the LED lamp 311 by, for example, ultrasonic bonding. The space between the portion 312 is sealed.

  The light diffusing plate 314 is not limited to a configuration provided so as to cover the side of the LED lamp 311 that emits light, and for example, the LED lamp 311 side of the light transmitting portion 104 that functions as a light transmitting window or its It may be arranged facing the opposite side. Further, the light transmission part 104 itself may be constituted by the light diffusion plate 314. Moreover, it is preferable that the light diffusing plate 314 used here is made of a material having a high transmittance with respect to light having a wavelength emitted from the LED lamp 311. Further, when the directivity of the light emitted from the LED lamp 311 is utilized and the light intensity is transmitted far away without being greatly attenuated, the illumination unit 300 is configured without providing the LED light diffusion plate 314. May be.

  In the illumination unit 300, the surface of the printed circuit board 310 and the connection part between the circuit of the printed circuit board 310 and the LED lamp 311 are electrically insulated from the outside by the mold unit 312. If it occurs, it will not affect the outside. Thereby, even if the inside of the instrument main body recess 101 in which the illumination unit 300 is installed is filled with the combustible gas in the combustible range, the combustible gas can be prevented from igniting and exploding.

  Further, when the light diffusion plate 314 is provided, the light from the LED lamp 311 can be diffused and irradiated over a wide range. Further, by providing the light diffusion plate 314, the influence of the surface temperature of the LED lamp 311 is not given to the outside.

  Next, another embodiment of the illumination unit 300 will be described with reference to FIGS. Here, FIG. 6 is a perspective view showing an appearance of the illumination unit 300, and FIG. 7 is a cross-sectional view of the illumination unit 300. In addition, the same code | symbol is attached | subjected to the same part as the structure of the illumination part 300 demonstrated in FIG. 1 and 2, and the overlapping description is abbreviate | omitted.

  6 and 7 includes a printed circuit board 310, an LED lamp 311 disposed on the printed circuit board 310 and electrically connected to the circuit of the printed circuit board 310, and the printed circuit board 310. A light diffusing plate 314 connected to the printed circuit board 310 so as to cover the LED lamp 311, two power supply pins 313 having one end connected to a part of the circuit of the printed circuit board 310 and the other end protruding outside, A printed circuit board 310 having an LED lamp 311 and a light diffusing plate 314 is housed inside, and is mainly composed of a sealed container 317 in which power pins 313 protrude outside through a sealed portion 316. The light diffusing plate 314 can be deleted as necessary.

In the illumination unit 300 in this form, the printed circuit board 310 and the LED lamp 311 provided on the printed circuit board 310 are sealed in the sealed container 317, so that it is not necessary to cover the printed circuit board 310 with the mold unit.
Further, the light diffusing plate 314 is bonded to the surface of the printed circuit board 310. In this case, the joint surface between the printed circuit board 310 and the light diffusing plate 314 need not be sealed.

  The hermetic container 317 functions as an electrical insulating member, and is composed of, for example, a transparent glass tube. In addition, the sealed container 317 can be formed of, for example, a transparent resin formed of an electrical insulating material.

  One end of the sealed container 317 is closed, and a sealed portion 316 is provided at the other end. A printed circuit board 310 having an LED lamp 311, a light diffusion plate 314, and the like is inserted and installed from the sealed portion, and then the other end of the power supply pin 313 is projected to the outside through the sealed portion 316. Then, the sealed container 317 is sealed by heating and softening and pressing the sealed portion 316. In this case, the power supply pin 313 is made of a material that can withstand this heating temperature. Further, this sealing process is performed with sufficient electrical insulation between the power pins 313. Further, the sealing method of the sealing portion 316 is not limited to this method, and any method that can seal the sealing portion 316 may be used. For example, electrical insulation between the power pins 313 may be performed with an electrically insulating ceramic adhesive or the like. The sealing portion 316 may be sealed sufficiently.

  Further, although not shown, the printed circuit board 310 in the sealed container 317 is preferably fixed by a predetermined fixing means provided in the sealed container 317. In addition, here, the cross section perpendicular to the longitudinal direction of the sealed container 317 is configured by a cylindrical body having a flat portion and a circular portion, but the cross sectional shape is not limited to this shape. A shape such as a polygon can also be used. Also in this case, it is preferable to provide a predetermined fixing means in the sealed container 317 to fix the printed circuit board 310.

  In the illumination unit 300, the printed circuit board 310 including the LED lamp 311 and the light diffusing plate 314 is sealed in the sealed container 317 and is electrically insulated from the outside. If it occurs, it will not affect the outside. Further, the influence of the surface temperature of the LED lamp 311 is not given to the outside. Thereby, even if the inside of the instrument main body recess 101 in which the illumination unit 300 is installed is filled with the combustible gas in the combustible range, the combustible gas can be prevented from igniting and exploding.

  Further, when the light diffusing plate 314 is provided, it is not necessary to be adhered to the printed circuit board 310 so that the light diffusing plate 314 can be easily adhered to the printed circuit board 310.

  Next, another form of the illumination unit 300 will be described with reference to FIGS. Here, FIG. 8 is a perspective view showing an appearance of the illumination unit 300, and FIG. 9 is a cross-sectional view of the illumination unit 300. In addition, the same code | symbol is attached | subjected to the same part as the structure of the illumination part 300 demonstrated in FIG. 1 and 2, and the overlapping description is abbreviate | omitted.

  8 and 9 includes a printed circuit board 310, an LED lamp 311 disposed on the printed circuit board 310 and electrically connected to the circuit of the printed circuit board 310, and a recessed portion. A printed circuit board 310 on which the LED lamp 311 is disposed is fitted and installed, a printed circuit board 310 having a printed circuit board cover 319 formed corresponding to the printed circuit board 310, One end is connected to a part of the circuit, and the other end is mainly composed of two power supply pins 313 protruding outside from the board installation housing 318.

  The board installation housing 318 functions as a part of an electrical insulating member, and is formed of, for example, a resin formed of an electrical insulating material. The substrate installation housing 318 is formed with a recess corresponding to the size of the printed circuit board 310 on which the LED lamp 311 is disposed. Further, a groove portion for projecting the power supply pin 313 to the outside of the board installation housing 318 is formed on one side wall of the board installation housing 318, and the printed board 310 is fitted into the board installation housing 318. At this time, the power supply pin 313 is fitted along the groove. If a gap is formed between the groove and the power pin 313 after the power pin 313 is fitted in the groove, the gap is filled with, for example, resin.

A substrate installation housing lid 319 formed corresponding to the substrate installation housing 318 functions as a part of an electrical insulating member, and is formed of, for example, a transparent resin or transparent glass formed of an electrical insulating material. Is done. Further, the substrate installation housing lid 319 may have a function as a light diffusion plate. In this case, the substrate installation housing lid 319 diffuses the light emitted from the LED lamp 311. Irradiate light over a wider area, for example, a prism, a concave lens, or a material having a high diffusivity. Although this board | substrate installation housing | casing cover part 319 is a shape where the recessed part was formed so that the protrusion part of the LED lamp 311 might be covered corresponding to protrusion of the LED lamp 311, it may be comprised with a flat plate. .
Further, the substrate installation housing lid 319 is bonded to the substrate installation housing 318 by, for example, ultrasonic bonding, and the space between the substrate installation housing 318 and the substrate installation housing lid 319 is sealed.

  In the illumination unit 300, the printed circuit board 310 including the LED lamp 311 and the like is sealed in the substrate installation housing 318 and the substrate installation housing lid 319, and is electrically insulated from the outside. Even if a short circuit or the like occurs in the substrate 310, it does not affect the outside. Further, the influence of the surface temperature of the LED lamp 311 is not given to the outside. Thereby, even if the inside of the instrument main body recess 101 in which the illumination unit 300 is installed is filled with the combustible gas in the combustible range, the combustible gas can be prevented from igniting and exploding.

Next, operation | movement of the explosion-proof lighting fixture 10 is demonstrated.
In the explosion-proof lighting device 10, for example, when a predetermined DC voltage (for example, 100 V) is supplied from the power supply unit (not shown) via the electric cable 203, the LED lamp 311 is disposed via the electric cable 103. Electric power is supplied to the printed circuit board 310. At this time, since the voltage required for the LED lamp 311 is 9 to 12 V, the supplied voltage is set to 9 to 12 V by a voltage regulator (not shown) provided in the explosion-proof lighting fixture 10. Power is supplied to the printed circuit board 310. When power is supplied to the LED lamp 311, the LED lamp 311 emits light. The light emitted from the LED lamp 311 is diffused by the light diffusion plate 314, passes through the light transmission unit 104, and is irradiated to the outside.

  The number of LED lamps 311 provided in the explosion-proof lighting apparatus 10 can be increased or decreased as necessary, and the arrangement is appropriately set to any arrangement such as rectangular, circular, polygonal, and linear. You may change to Further, a unit composed of a plurality of LED lamps 311 may be formed, and an assembly of the plurality of LED lamps 311 that are unitized may be arranged.

  Here, a configuration is shown in which a DC voltage is supplied at 100 V from a power supply unit (not shown). For example, a necessary DC voltage of 9 to 12 V is supplied to the LED lamp 311 from the power supply unit (not shown). In this case, it is not necessary to provide a voltage regulator or the like in the explosion-proof lighting apparatus 10.

  Next, an explosion-proof lighting system 400 in which 30 explosion-proof lighting fixtures 10 are connected will be described with reference to FIG.

  Here, FIG. 10 is a diagram showing an example of an outline of an explosion-proof lighting system 400 in which 30 explosion-proof lighting fixtures 10 are connected. In addition, the same code | symbol is attached | subjected to the same component as the explosion-proof lighting fixture 10 of one embodiment mentioned above, and the overlapping description is abbreviate | omitted.

  The explosion-proof lighting system 400 shown in FIG. 10 is composed of 30 explosion-proof lighting fixtures 10 each connected electrically in parallel via a power supply unit 401 and an electric cable 203. Here, each explosion-proof lighting fixture 10 is installed at intervals of 3 m. The installation interval of each explosion-proof lighting fixture 10 is not limited to this interval, and can be set as appropriate as long as the function as a lighting fixture is satisfied.

  The power supply unit 401 is supplied to the power supply unit 401, for example, rectifies and adjusts even if the supplied AC voltage fluctuates in the range of 100 to 240V, and supplies, for example, a constant output of the DC voltage 100V to the electric cable 203. It is a power supply that can do.

  In addition, since the power supply unit 401 is installed in the cave, the structure of the power supply unit 401 adopts a pressure-proof explosion-proof structure, and the explosion-proof lighting apparatus 10 is made of, for example, flammable gas or liquid that becomes flammable gas when vaporized. Since it is installed on a wall surface such as a cave where the piping to be pumped is installed, the member constituting the power supply unit 401 is made of, for example, aluminum, copper, or the like that does not generate a spark or the like by contact.

  In each explosion-proof lighting device 10 to which a DC voltage of 100 V is supplied from the power supply unit 401, light is emitted from each explosion-proof lighting device 10 into the sinus by the same operation as the operation of the explosion-proof lighting device 10 described above.

  Furthermore, the explosion-proof lighting system 400 further includes detection means for detecting gas leaks in the sinus, and for example, when detecting gas leaks, the color of light emitted by the LED lamp is a normal color. It may be emitted in a different manner to visually notify the operator of the danger. In this case, each explosion-proof lighting fixture 10 constituting the explosion-proof lighting system 400 or a predetermined explosion-proof lighting fixture 10 is provided with an LED lamp having a different emission color from the LED lamp that normally emits light, or one LED A type of LED lamp that can emit light of a plurality of colors is used.

  Also, in the explosion-proof lighting system 400, the configuration in which the DC voltage 100V is supplied from the power supply unit 401 is shown. For example, the DC voltage 9-12V necessary for the LED lamp 311 can be supplied from the power supply unit 401. In this case, it is not necessary to provide a voltage regulator or the like in the explosion-proof lighting fixture 10.

  According to the explosion-proof lighting apparatus 10 and the explosion-proof lighting system 400 of the above-described embodiment of the present invention, a structure in which the surface of the printed circuit board 310 and a connection part between the circuit of the printed circuit board 310 and the LED lamp 311 are covered with the mold unit 312; A structure in which the printed circuit board 310 including the LED lamp 311 and the light diffusion plate 314 is sealed in the sealed container 317, and the printed circuit board 310 including the LED lamp 311 and the like in the substrate installation housing 318 and the substrate installation housing lid 319. By providing a structure for hermetically sealing, a so-called lamp structure can be adopted, which can be electrically insulated from the outside. Thereby, for example, even if a short circuit or the like occurs in the printed circuit board 310, it does not affect the outside. Therefore, the instrument body 100 on which the illumination unit 300 is installed can be configured with a safety explosion-proof structure. The instrument body 100 can be reduced in weight, size, cost, and the like.

Furthermore, since the instrument main body 100 can be comprised with a safety explosion-proof structure, it can be set as a sealed structure and the moisture-proof effect can also be acquired.
Further, when the light diffusion plate 314 is provided, the light from the LED lamp 311 can be diffused and irradiated over a wide range.

  Further, the illumination unit 300 is provided with a power supply pin 313, and the power supply pin 313 is fitted into the electric socket 360, whereby electric power can be supplied to the illumination unit 300. By adopting such a so-called lamp structure, the lighting unit 300 can be easily installed or replaced.

  Further, by using the LED lamp 311 as the light source, the power consumed by the explosion-proof lighting apparatus 10 can be greatly reduced.

  Furthermore, even when the explosion-proof lighting system 400 is used, the power supplied can be greatly reduced by using the LED lamp 311 as the light source, so that the voltage drop in the electric cable 203 is very small and a relatively long electric cable. For example, it is suitable as the explosion-proof lighting device 10 installed in the tunnel or tunnel.

The top view which shows the front of the explosion-proof lighting fixture in one Embodiment of this invention. The figure which shows a part of AA cross section of FIG. The figure which shows the BB cross section of FIG. The perspective view which shows the external appearance of an example of embodiment in an illumination part. Sectional drawing of an example of embodiment in an illumination part. The perspective view which shows the external appearance of another example of embodiment in an illumination part. Sectional drawing of other examples of embodiment in an illumination part. The perspective view which shows the external appearance of another example of embodiment in an illumination part. Sectional drawing of other examples of embodiment in an illumination part. The figure which shows an example of the outline | summary of the explosion-proof lighting system which connected 30 explosion-proof lighting fixtures.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Explosion-proof lighting apparatus, 100 ... Instrument main body, 101 ... Instrument main body recessed part, 102 ... Through part, 102a, 102b ... Through-hole, 104 ... Light transmission part, 103, 203 ... Electric cable, 105 ... Packing, 106 ... Instrument main body Cover part 106a ... Opening part 106b ... Recessed part 200 ... Cable branching body part 201 ... Cable branching body concave part 202 ... Junction convex part 202a ... Penetration part 204 ... Cable penetration part 204a, 204b ... Through hole 205 DESCRIPTION OF SYMBOLS ... Packing, 206 ... Cable cover part, 207 ... Joint convex part, 207a ... Through part, 208 ... Cable branch main body cover part, 300 ... Illumination part, 350 ... Illumination part fixing plate, 360 ... Electric socket.

Claims (3)

A sealed instrument housing having a light transmissive window on at least one surface;
An illuminating device which is disposed in the appliance housing so as to face the light transmission window and which is sealed so as to cover at least a base material on which an LED is disposed as a light source with an electrically insulating member;
One end connected to the base material, and a power supply connecting part protruding from the lighting device via the electrical insulating member;
An electric cable branching case for power supply introduction, which is formed on one surface of the appliance housing and is hermetically sealed;
A main electric cable disposed airtightly through the electric cable branch housing;
A branched electrical cable that branches off from the main electrical cable in the electrical cable branch housing and that hermetically penetrates the appliance housing and is connected to the lighting device;
Explosion-proof lighting equipment characterized by comprising.   The explosion-proof lighting apparatus according to claim 1, further comprising a light diffusion plate that is installed facing a light emission side surface of the light source or the light transmission window and diffuses light emitted from the light source. A sealed instrument housing having a light transmissive window on at least one surface;
An illuminating device which is disposed in the appliance housing so as to face the light transmission window and which is sealed so as to cover at least a base material on which an LED is disposed as a light source with an electrically insulating member;
One end connected to the base material, and a power supply connecting part protruding from the lighting device via the electrical insulating member;
An electric cable branching case for power supply introduction, which is formed on one surface of the appliance housing and is hermetically sealed;
A main electric cable disposed airtightly through the electric cable branch housing;
A branched electrical cable that branches off from the main electrical cable in the electrical cable branch housing and that hermetically penetrates the appliance housing and is connected to the lighting device;
A group of explosion-proof luminaires, wherein a plurality of explosion-proof luminaires are electrically connected by the main electric cable;
A power supply unit provided in a flameproof enclosure for rectifying an AC voltage supplied from a supply power source into a DC voltage and supplying a predetermined voltage to the plurality of explosion-proof lighting fixtures via the main electric cable When;
An explosion-proof lighting system comprising:

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