KR20020008929A - An illuminator having a explosion and flame proof - Google Patents

Abstract

PURPOSE: An explosion-proof lamp mechanism is provided to allow a lamp to be easy exchanged, and allow a power supply to be cut off at the same time a glove is detached to exchange the lamp without cutting off an external power supply. CONSTITUTION: An explosion-proof lamp mechanism includes a case to which a lamp(5) and a glove(20) are attached, wherein the glove(20) accommodates therein the lamp(5) to prevent the lamp(5) from being damaged. The explosion-proof lamp mechanism includes a multiplicity of wings(21a,21b) which is formed on the circumference edge of the glove(20) in a facing relationship with each other. A multiplicity of guide grooves(30b) is formed on the case(10) so that the multiplicity of wings(21a,21b) is inserted and moved into the multiplicity of guide grooves(30b) according to the rotation of the glove(20). A switching member is operated in response to a contact condition of the member with the multiplicity of wings(21a,21b) inserted and moved into the multiplicity of guide grooves(30b), to thereby turn on and off the power supply to be applied to the lamp(5). The switching member includes a through hole which is drilled to bottom surface of the multiplicity of guide grooves(30b), a cap which is mounted within the through hole and is protruded from the bottom surface by a predetermined height, and is contacted with bottom surface of the wings(21a,21b).

Description

Explosion proof lighting fixtures {An illuminator having a explosion and flame proof}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an explosion-proof luminaire, and more particularly, to an explosion-proof luminaire in which the mounting of the glass globe and the lamp is made simple, and the power applied to the lamp is turned on / off simultaneously with the detachment of the glass globe.

There is always a risk of explosions and fires in oil refineries, gas refineries and plants handling flammable materials.

Therefore, these hazardous areas are classified according to their risk status in international conventions such as the National Electric Code (NEC) or the International Electro-technical Committee (IEC).

As a representative example of this classification, the dangerous place is divided into three places.The place where the dangerous atmosphere is continuously generated or is likely to occur in the normal state is identified as the 0 species and the place where the dangerous atmosphere may occur in the normal place. There are two kinds of places, one place and a place where dangerous atmosphere can exist for a short time under abnormal conditions.

There are always risks of explosions and fires in the 0 and 1 of these hazardous areas, so the electrical equipment (power cables, switches and switch boxes, connectors, luminaires, etc.) used in these areas may be sparked or unsafe. If a connection is made, this will cause an explosion and fire, and electric appliances require a means to prevent exposure to an explosion and fire.

Therefore, electrical appliances used in hazardous areas are usually defined to have an explosion-proof structure.

1 is a partially exploded perspective view for explaining the explosion-proof luminaire installed for lighting in such a dangerous area, as shown in the explosion-proof luminaire is a cover (1) in which an external power cable (not shown) is inserted to one side And a housing 3 which is coupled to the cover and has a case 2 to which the lamp 5 is attached to the upper surface, and a glass globe 4 covering the lamp is disposed on the upper surface of the case to improve the damage and roughness of the lamp 5. The protection net 6 is attached to the case 2 outside the glass glove 4.

The glass glove 4 and the case 2 are coupled to each other by forming a male screw thread 7 at the lower end of the glass glove and a female screw thread 8 on the inner circumferential wall of the case 2.

In addition, the conventional explosion-proof luminaire should have an explosion-proof structure, so that the coupling surface of the case 2 and the cover 1, the coupling surface of the glove 4 and the case 2, the coupling surface of the lamp 5 and the case 2 It is sealed to prevent the inflow of outside air.

However, such a conventional explosion-proof luminaire is inconvenient to replace the lamp.

That is, in order to replace the lamp, the glove has to be removed from the case, but since the glove and the case are combined with each other by a threaded coupling method, there is an inconvenience of having to remove the glove by rotating the glove several times.

In addition, in order to replace the lamp, it is inconvenient to cut off the power applied to the power cable from the external power switch, and when replacing the globe and the lamp without turning off the power switch due to an operator's mistake. In addition, there is a risk of explosion due to sparking, a problem of being burned by lamp heat, and a safety accident such as an electric shock.

Accordingly, an object of the present invention is to provide an explosion-proof luminaire that easily replaces a lamp and detaches a globe to replace a lamp even when the external power switch is not blocked.

Accordingly, the explosion-proof luminaire according to the present invention is an explosion-proof luminaire with a glove for accommodating the lamp therein in order to prevent damage to the lamp and the lamp in the explosion-proof case for achieving the above object, the lower outer peripheral edge of the glove A plurality of protrusion pieces formed to face each other, a plurality of guide grooves formed in the case so that the protrusion pieces are inserted and moved according to the rotation of the glove, and whether the protrusion pieces are installed and moved in the guide groove. And switching means for being operated to turn on / off the power applied to the lamp.

The switching means may include a through hole drilled in the bottom surface of the guide groove, a cap installed inside the through hole and coming out to the bottom surface of the guide groove to be in contact with the bottom surface of the protrusion piece, and one end at the bottom of the cap. And a contact rod attached to a plate inside the explosion-proof case so that the power applied to the lamp is turned on and off while the contacts are shorted in accordance with the vertical movement of the driving rod. It is made, the guide groove is provided with a separation preventing means for preventing the separation of the inserted glove.

The separation preventing means includes a first through hole drilled in the upper surface of the guide groove, a second through hole drilled in the bottom surface of the guide groove, the first and second fixing grooves formed on the inner wall surface, and the first and second holes. A driving rod inserted into the through hole, a rotary knob attached to one end of the driving rod and positioned outside the first through hole, and attached to the other end of the driving rod and positioned inside the second through hole, A fixed cam having a projection inserted into a second fixing groove, and a coil spring whose both ends are supported on the cover piece inserted into the rear end of the fixing cam and the lower opening of the second through hole, and the protrusion of the fixing cam When the fixing cam is located in the first fixing groove, the fixing cam is positioned inside the second through hole, and when the protrusion of the fixing cam is located in the second fixing groove, the fixing cam protrudes higher than the bottom surface of the guide groove. .

1 is a partially exploded perspective view for explaining a conventional explosion-proof luminaire.

2 is a partially exploded perspective view for explaining the explosion-proof luminaire according to the present invention.

3 is a front view of the explosion-proof luminaire according to the present invention.

4, 5 is a plan view of the explosion-proof luminaire according to the present invention.

FIG. 6 is a sectional view taken along the line VI-VI ′ of FIG. 4.

FIG. 7 is a sectional view taken along line VII-VII 'in FIG. 5; FIG.

FIG. 8 is a sectional view taken along line VII-VII 'in FIG. 7; FIG.

9 is a perspective view of the locking member of the explosion-proof luminaire according to the present invention.

※ Explanation of code about main part of drawing ※

1: cover 2,10: case

4,20: Globe 5: Lamp

6: protection net 30: guide home

40: switching means 50: separation prevention means

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the explosion-proof luminaire according to the present invention.

2 is a partially exploded perspective view of the explosion-proof luminaire according to the present invention, Figure 3 is a front view of the explosion-proof luminaire according to the present invention.

4 and 5 are plan views of explosion-proof luminaires according to the present invention.

As shown, the explosion-proof luminaire of the present invention is coupled to the case 10 and the case is attached to the lamp 5 on the upper surface and the cover is inserted into the power cable (not shown) for applying power to the lamp 5 to the lower side A housing 9 made of (1), a glass glove 20 attached to an upper surface of the case 10 to accommodate the lamp 5 therein, and preventing damage to the lamp and improving illuminance, and an upper surface of the case 10. It consists of an attached protective net (6).

In addition, the upper surface of the case 10 is formed stepped in the form of a concave, the inner peripheral wall surface 11 of the upper surface of the concave case open in the direction of the center of the case, one end is opened in the clockwise direction and the other end is blocked; The second guide grooves 30a and 30b are formed to face each other.

The glass globe 20 has wings 21a and 21b respectively inserted into the first and second guide grooves 30a and 30b as the globe rotates at the lower end thereof.

And, the explosion-proof luminaire according to the present invention should have an explosion-proof structure, the coupling surface of the case 10 and the cover 1, the coupling surface of the glove 20 and the case 10, the coupling surface of the lamp 5 and the case 10 Of course, it is sealed to prevent the inflow of outside air.

4 is a plan view before the glove 20 is coupled to the case 10 in the explosion-proof luminaire according to the present invention, Figure 5 is a plan view after the glove 20 is coupled to the case 10 in the explosion-proof luminaire according to the present invention to be.

As shown, the coupling of the glove 20 first seats the glove on the upper surface of the case 10, and rotates the glove 20 by 90 ° clockwise in this state so that the wings 21a and 21b of the glove 20 It is inserted into and fixed to the open ends of the first and second guide grooves (shown by dashed lines) 30a and 30b.

On the contrary, disassembly of the glove 20 rotates the glove by 90 ° in the opposite direction of the engagement (counterclockwise) so that the vanes 21a and 21b of the glove are detached from the guide grooves 30a and 30b.

Therefore, the explosion-proof luminaire according to the present invention is easy to replace the lamp because the combination of the glove 20 and the case 10 is made only by 90 ° rotation of the glove.

The explosion-proof luminaire according to the present invention is provided with a switching means 40 for disconnecting and supplying power applied to the lamp 5 at the same time with the detachment of the glove 20.

Referring to Figure 6, the switching means is installed on the bottom surface of any one of the first and second guide grooves (30a, 30b).

Here, it will be described on the basis that the switching means is installed on the bottom surface 31 of the first guide groove (30a).

In more detail, the switching means 40 is installed in the through hole 41 drilled in the bottom surface 31 of the first guide groove, and is installed inside the through hole to be projected a predetermined height to the bottom surface 31 of the guide groove. Cap 42, a driving rod 43, one end is attached to the lower end of the cap to move vertically in conjunction with the appearance of the cap, and the external power cable (not shown) while the contacts are shorted according to the vertical reciprocating motion of the driving rod It consists of a contact terminal 44 fixed to the diaphragm 12 inside the case 10 so that the power applied to the lamp 5 is applied on / off.

In addition, the cap 42 of the switching means is formed in a hemispherical shape in the cross section of the end.

In the switching means 40 of the explosion-proof luminaire according to the present invention having such a configuration, when the blade 21b of the globe is inserted into the first guide groove 30a and rotated 90 ° clockwise, the globe 20 is fixed. The lower surface 22 of the wing presses the cap 42 protruding onto the bottom surface 31 of the guide groove to move downward, and the drive rod 43 vertically moves downward in contact with the contact terminal. (44) The power is turned on by contacting the contact formed therein.

On the contrary, when the globe 20 rotates 90 ° counterclockwise and the wing 21b of the globe is separated from the guide groove 30a, when the globe 20 rotates, the pressure of the cap 42 is released and the cap is guided. Protruding from the bottom surface 31 of the groove, in conjunction with this drive rod 43 is vertically moved upwards, the contact of the contact terminal 44 is short-circuited, the power is turned off.

As described above, the explosion-proof luminaire according to the present invention has various safety accidents such as an electric shock occurring when the globe is replaced by turning on / off the power by the switching means 40 at the same time as the detachment of the glove 20. It can be prevented.

The explosion-proof luminaire according to the present invention is provided with a gripping prevention means 50 of the glove 20 to prevent the glove 20 coupled to the case 10 from being separated from the first and second guide grooves 30a and 30b.

Referring to FIG. 7, the gripping prevention means 50 of the glove is for preventing the glove 20 installed and installed in one of the guide grooves in the guide grooves 30a and 30b of the case from being separated from the guide groove. It will be described on the basis of what is installed in the first guide groove (30a).

As shown, the globe detachment preventing means 50 of the explosion-proof luminaire according to the present invention passes through the guide grooves 30a from the outer periphery of the case 10 to the inside of the case 10, respectively. Locking member inserted into the ball (51, 52), the first and second through-holes and in contact with the wing (21b) of the globe while being driven to a predetermined height into the guide groove (30a) to prevent the rotation of the globe 20 It consists of 60.

More specifically, as illustrated in FIGS. 7 and 9, the locking member 60 is attached to one end of the driving rod 61 and the driving rod 61 inserted into the first and second through holes 51 and 52. A knob 62 positioned outside the first through hole 51, a fixed cam 63 attached to the other end of the driving rod, and positioned inside the second through hole 52, and a rear end of the fixed cam 63; The cover 65 inserted into the lower opening of the second through hole 52 has a coil spring 66 whose both ends are supported.

Here, the projections 64a and 64b are formed at positions opposite to each other on the outer circumference of the fixed cam 63. Referring to FIG. 8, the projections of the fixed cam in the horizontal direction are formed on one inner wall surface 53 of the second through hole. Moving grooves 54 are formed to be horizontally movable 64a and 64b, and are formed at different heights perpendicular to the moving grooves 54 so that the projections 64a and 64b of the fixed cam are moved and positioned. 2 fixing grooves 55 and 56 are formed.

In addition, the same moving groove and the fixing groove are formed on the other inner wall surface of the second through hole.

When the projection 64a of the fixing cam is positioned at the end of the fixing groove 55, the vertical length of the first fixing groove 55 guides the fixing cam 63 of the locking member by the elastic force of the coil spring 66. It is formed to be positioned inside the second through hole 52 without protruding higher than 30a.

When the projection 64a of the fixing cam is positioned at the end of the fixing groove 56, the vertical length of the second fixing groove 56 guides the fixing cam 63 of the locking member by the elastic force of the coil spring 66. It is formed to protrude higher than 30a.

The separation prevention means 60 of the explosion-proof luminaire according to the present invention having such a configuration has a fixed cam 63 when the projections 64a and 64b of the fixed cam are positioned in the first fixing groove 55. Since the glove 20 is not protruded higher than 30a, the glove 20 can be rotated 90 ° clockwise, so that the wing 21b of the glove can be inserted into the guide groove 30a.

In this state, when the knob 62 of the release preventing means is pressed, the driving rod 61 and the fixed cam 63 press the coil spring 66 while the protrusions 64a and 64b of the fixed cam are first fixed groove 55. Departed from is located in the moving groove (54).

In this state, the knob 62 of the release preventing means is rotated so that the projections 64a and 64b of the fixed cam move horizontally in the moving groove 54 to be positioned below the second fixing groove 56. When the pressing force applied to 62 is released, the projections 64a and 64b of the fixed cam are pushed into the second fixing groove 56 by the elastic force of the coil spring 66.

Therefore, the fixing cam 63 located in the second through hole 52 protrudes higher than the bottom surface 31 of the guide groove so that the wing 21b of the glove is fixed so as not to escape from the guide groove 30a. Desorption of (20) is prevented.

In addition, in order to attach and detach the glove 20, the projections 64a and 64b of the fixed cam may be positioned in the first fixing groove 51 in the second fixing groove 56.

As described above, the explosion-proof luminaire according to the present invention can be easily attached and detached from the globe, and has a structure in which power is cut off at the same time as the detachment of the globe, thereby preventing an electric shock occurring during the replacement of the globe. You can do it.

In addition, the explosion-proof luminaire according to the present invention is provided with a separate glove separation prevention means to prevent the safety accident and the damage of the glove due to the drop of the glove generated by the glove is separated from the case.

Claims (5)

An explosion-proof luminaire having an explosion-proof case and a glove for accommodating the lamp therein for preventing damage to the lamp and the lamp, A plurality of wings formed to face the lower outer periphery of the glove; A plurality of guide grooves formed in the case such that the blade is inserted and moved according to the rotation of the glove; Explosion-proof luminaires provided with switching means for switching on and off the power applied to the lamp is operated according to the contact with the wing moving in the guide groove. The method according to claim 1, The switching means includes a through hole drilled in the bottom surface of the guide groove; A cap installed inside the through hole and in contact with a bottom surface of the wing while releasing a predetermined height toward the bottom surface of the guide groove; One end is attached to the lower end of the cap and the driving rod for vertical movement in conjunction with the appearance of the cap; An explosion-proof luminaire comprising a contact terminal fixed to a diaphragm inside the explosion-proof case so that the power applied to the lamp is turned on / off while the contacts are shorted according to the vertical movement of the driving rod. The method according to claim 1 or 2, The guide groove is explosion-proof luminaires, characterized in that the departure prevention means for preventing the separation of the inserted glove. The method according to claim 3, The separation preventing means includes a first through hole drilled in the upper surface of the guide groove; A second through hole formed in the bottom surface of the guide groove and having first and second fixing grooves formed on an inner wall thereof; A driving rod inserted into the first and second through holes; A rotary knob attached to one end of the driving rod and positioned outside the first through hole; A fixed cam attached to the other end of the driving rod and having a protrusion positioned inside the second through hole and inserted into the first and second fixing grooves; Explosion-proof luminaires, characterized in that the end of the fixed cam and the cover inserted in the lower opening of the second through hole, both ends are respectively coiled coil springs. The method according to claim 4, When the protrusion of the fixed cam is located in the first fixing groove, the fixed cam is located inside the second through hole, Explosion-proof luminaires, characterized in that when the projection of the fixing cam is located in the second fixing groove the fixed cam protrudes higher than the bottom surface of the guide groove.