JP2018029051A - Waterproof performance-improved explosion-proof light - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an explosion-proof light with improved waterproof performance.SOLUTION: The explosion-proof light comprises: a body provided with a lamp emitting light; a converter 200 to convert electric power supplied to the body; a junction box electrically connected to the converter through a power line W; a connector 400 mechanistically connecting the converter and the junction box and provided with a hollow part to pass the power line through; and packing 500 which blocks passage of water through between the power line and the converter in a fastening hole of the converter to screw the connector into, and whose edge is compressed by the connector when mounted on a projection of the converter, where the packing is configured to increase the area adhering to an outer peripheral surface of the power line even if the edge is compressed by the connector.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a waterproof performance improved explosion-proof lamp, and more particularly, to a waterproof performance improved explosion-proof lamp that is capable of preventing a failure or an accident due to moisture penetration even in a humid environment exposed to rainwater. .

  In factories that handle explosion accidents, petrochemicals, thermal power generation, pharmaceuticals, etc., switches, lighting facilities, liquid level gauges, etc. that have explosion-proof technology are used. Things are mainly called explosion-proof equipment.

  Explosion-proof technology is applied to explosion-proof lamps, and safety is emphasized like chemical factories, liquefied natural gas (LPG) filling stations, mine tunnels, and nuclear power plants that may explode due to dust, steam and gas. This refers to a panel light that has been made available for use in the area.

  In this connection, Korean Patent No. 1370127 discloses a waterproof device for industrial LED explosion-proof lamps, and Korean Patent No. 1370127 is disclosed from the upper surface of a housing in which an LED is provided. A threaded portion is formed on the inner peripheral surface of the portion protruding to the upper outer side and the lower inner side of the housing, and is coupled to the lower end of the wire guide tube. A connecting tube having an inner diameter larger than the outer diameter of the wire guide tube on the inner peripheral surface of the protruding portion, and a packing mounting groove formed with an inclined surface toward the center at the lower end; It is fitted in a packing mounting groove formed inside the lower part of the connecting pipe, and an inclined surface having the same inclination as the inclined surface formed in the packing mounting groove is formed on the outer side of the lower end portion toward the center side. In Configured to include a waterproof packing a single or a plurality of wire guide hole formed therethrough.

  Korean Registered Patent Publication No. 1370127 has a diameter larger than the outer diameter of the wire guide tube inside the lower part of the connecting tube formed on the upper surface of the housing constituting the explosion-proof lamp, and tilted toward the center at the lower end When an outer wire guide tube is fastened to the connecting tube in a state where a packing mounting groove having an inclined surface is formed and a separate waterproof packing having the same configuration is fitted in the packing mounting groove, the waterproof packing is connected to the wire guide. Since it is tightened to the center side along the inclined surface while being pressed by the fastening force of the tube, no gap is formed between the wire guide tube and the connecting tube and between the wire guide hole and the wire on the waterproof packing, As a result, there is an advantage that the inflow of external rainwater and fine dust is blocked.

  However, in Korean Patent No. 1370127, when the upper end edge of the waterproof packing is pressed by the fastening force of the electric wire guide tube, as shown in FIG. Since the upper portion of the wire guide hole is moved to the edge side while being compressed downward by the tube, a gap is formed between the wire guide hole and the wire.

  As shown in FIG. 1, since moisture easily penetrates through the gap, when the explosion-proof lamp equipped with the waterproof device of Korean Patent No. 1370127 is provided in a humid environment exposed to rainwater, There is a high possibility of breakdown and accidents due to penetration.

Korean Registered Patent Publication No. 1370127 (Registration Date: 2014.02.26)

  An object of the present invention is to provide a waterproof performance-improved explosion-proof lamp capable of preventing a failure or an accident due to moisture penetration even in a humid environment exposed to rainwater.

  An object of the present invention is to provide a body provided with a lamp that emits light according to the present invention; a converter that converts power supplied to the body; a junction box that is electrically connected to the converter by a power line; the converter and the junction A coupling device that mechanically couples the boxes and has a hollow portion through which the power supply line passes; and a through hole between the power supply line and the converter in a fastening hole of the converter into which the coupling device is screwed. The packing includes a packing whose edge is compressed by the connector in a state where the moisture is blocked and attached to the protrusion of the converter, and the packing has an outer periphery of the power line even if the edge is compressed by the connector This is achieved by a waterproof performance-enhanced explosion-proof lamp characterized by an increase in the area closely attached to the surface.

  The packing is attached to the protrusion, and an inner peripheral surface is separated from the power supply line; a process of projecting from the attachment part to the opposite side of the protrusion, and the attachment part being compressed by the connector A raised portion that is pressed by the inner peripheral surface of the connector and pushed toward the power supply line side; and that extends from the mounting portion and is inserted into the power line passage hole in the center of the protrusion, and the inner peripheral surface is the power line An insertion portion that is in close contact with the power supply line, so that even if the attachment portion is compressed by the connector, the raised portion is pushed toward the power supply line so that the inner peripheral surface of the attachment portion is in close contact with the power supply line. Can be made.

  The raised portion is formed in a form in which an arc-shaped cross section protruding from the mounting portion toward the connector is continuous along a circumferential direction around a screwing shaft of the connector, and an end of the connector An inclined surface that slides on the curved surface of the raised portion may be formed between the inner peripheral surface and the inner peripheral surface.

  A protruding portion that is in close contact with the power supply line is formed on the inner peripheral surface of the insertion portion, and the mounting portion that is in close contact with the power supply line due to a step between the inner peripheral surface of the mounting portion and the protruding portion. A water isolation space surrounded by the power supply line and the packing can be formed between the inner peripheral surface of the first and the protruding portions.

  A moisture absorber that absorbs moisture penetrating into the moisture isolation space is attached to the inner circumferential surface of the packing between the inner circumferential surface of the mounting portion and the projecting portion that are in close contact with the power line. Can be made.

  A protrusion that is in close contact with the power supply line is formed on the inner peripheral surface of the insertion portion, and a protrusion that is in close contact with the power supply line is formed on the inner peripheral surface of the mounting portion. A moisture isolating space surrounded by the power line and the packing may be formed between the parts.

  A moisture absorber that absorbs moisture that has penetrated into the moisture isolation space may be attached to the inner peripheral surface of the packing between the protruding portion and the protruding portion.

  The packing includes an engaging portion that extends from the insertion portion and is in close contact with the protruding portion on the opposite side of the mounting portion with respect to the protruding portion, and the packing and the engaging portion are disposed between the mounting portion and the engaging portion. A moisture isolation space surrounded by the protrusion may be formed.

  Between the mounting portion and the engaging portion, a moisture absorber that absorbs moisture penetrating the moisture isolation space may be attached to the outer peripheral surface of the packing.

  In the joint box of the junction box to which the connector is screwed, the passage of moisture between the power line and the junction box is blocked, and the joint box is screwed in a state of being attached to the step portion of the junction box. A seal packing whose edges are compressed by the connector, and the connector and the junction box are bi-directionally connected to the outer peripheral surface of the connector while the connector is screwed into the fastening hole and the coupling hole in both directions. An annular protrusion that is pressed from can be formed.

  According to the present invention, the contact area between the packing and the power line increases in the process of compressing the edge of the packing by the coupling tool, so that even if it is provided in a humid environment exposed to rainwater, It is possible to provide an explosion-proof light with improved waterproof performance that prevents accidents.

It is the fragmentary sectional view which showed the waterproof structure by the packing of the conventional explosion-proof lamp. 1 is a perspective view of a waterproof performance improved explosion-proof lamp according to an embodiment of the present invention. FIG. 2 is an exploded perspective view of the waterproof performance improved explosion-proof lamp of FIG. 1. It is the fragmentary sectional view which showed the coupling tool, packing, and the fastening hole in the waterproofing performance type | mold explosion-proof lamp of FIG. It is the fragmentary sectional view which showed the coupling tool, packing, and the fastening hole in the waterproofing performance type | mold explosion-proof lamp of FIG. FIG. 2 is a partial cross-sectional view illustrating a connector, a sealing packing, and a coupling hole in the waterproof performance improved explosion-proof lamp of FIG. 1. It is the fragmentary sectional view which showed the coupling tool, packing, and the fastening hole in the waterproofing performance improvement type explosion-proof lamp by other embodiment of this invention.

  Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, in describing the present invention, descriptions of already known functions or configurations will be omitted to clarify the gist of the present invention.

  The waterproof performance-enhanced explosion-proof lamp of the present invention can prevent a failure or an accident due to moisture penetration even if it is provided in a humid environment exposed to rainwater.

  FIG. 1 is a partial cross-sectional view showing a waterproof structure by packing of a conventional explosion-proof light, FIG. 2 is a perspective view of a waterproof performance improved explosion-proof light according to an embodiment of the present invention, and FIG. 3 is a waterproof performance improved explosion-proof of FIG. 4 and FIG. 5 are partial cross-sectional views showing a connector, packing and fastening holes in the waterproof performance improved explosion-proof light of FIG. 1, and FIG. 6 is a connection of the waterproof performance improved explosion-proof light of FIG. 7 is a partial cross-sectional view showing a fixture, a sealing packing, and a coupling hole, and FIG. 7 is a partial cross-sectional view showing a connector, packing, and fastening hole in a waterproof performance improved explosion-proof lamp according to another embodiment of the present invention.

  As shown in FIG. 2 and FIG. 3, the waterproof performance improved explosion-proof lamp 10 of the present invention prevents malfunctions and accidents due to moisture penetration even when provided in a humid environment exposed to rainwater. The body 100, the converter 200, the junction box 300, the connector 400, the packing 500, and the sealing packing 600 are configured.

  A body 100 provided with a lamp that emits light, a converter 200 that converts electric power supplied to the body 100, and a junction box 300 that is electrically connected to the converter 200 by a power line W are configured as a general explosion-proof light. Therefore, a detailed description of the detailed configuration of the body 100, the converter 200, and the junction box 300 will be omitted.

  In the conventional explosion-proof lamp, the body 100 and the converter 200 are mainly fastened by bolts, and the converter 200 and the junction box 300 are connected by a nipple or a pipe. In the waterproof performance improved explosion-proof lamp 10 of the present invention, the connector 400 is configured to mechanically connect the converter 200 and the junction box 300 like a conventional nipple or pipe, and there are threads on the outer peripheral surfaces of both ends. The hollow portion 401 is formed inside.

  As shown in FIG. 4, the power line W that electrically connects the junction box 300 and the converter 200 passes through the hollow portion 401. In the following, for easy understanding, the upper and lower parts are described in the illustrated state.

  As shown in FIGS. 3 and 4, the connector 400 is screwed to the upper end of the converter 200 to form a fastening hole 201 through which the power line W passes. A screw thread into which the connector 400 is screwed is formed on the inner peripheral surface of the fastening hole 201, and a protrusion 210 to which the packing 500 is attached is formed inside the fastening hole 201 below the screw thread. The protrusion 210 is formed in a ring shape protruding in the radial direction from the inner peripheral surface of the fastening hole 201. The central portion of the protrusion 210 forms a power line passage hole 211 through which the power line W passes.

  As shown in FIG. 5B, the packing 500 is configured to block the passage of moisture between the power line W and the converter 200 in the fastening hole 201, and includes a mounting portion 510 and a raised portion. 520, the insertion part 530, and the engaging part 540 are comprised.

  As shown in FIGS. 4 and 5, the mounting portion 510 is configured to be mounted on the protrusion 210 and has a ring shape having a flat surface that is in close contact with the upper surface of the protrusion 210 on the bottom surface.

  The inner diameter of the mounting portion 510 is formed to be the same as or slightly larger than the outer diameter of the power line W. FIG. 5 shows that the inner diameter of the mounting portion 510 is formed slightly larger than the outer diameter of the power supply line W. In FIG. 5, it can be confirmed that the inner peripheral surface of the mounting portion 510 is separated from the outer peripheral surface of the power supply line W. Below, the state where the inner diameter of the mounting portion 510 is formed slightly larger than the outer diameter of the power supply line W will be described as a reference.

  The raised portion 520 is a structure for inducing elastic deformation of the mounting portion 510 toward the power line W in the process in which the connector 400 is screwed into the fastening hole 201. Projects to the opposite side. The raised portion 520 is formed in a form in which an arc-shaped cross section protruding from the mounting portion 510 toward the connector 400 is continuous along the circumferential direction around the screwing shaft of the connector 400.

  As shown in FIG. 4, an inclined surface 410 that slides on the curved surface of the raised portion 520 is formed between the end portion of the connector 400 and the inner peripheral surface. When the connector 400 is screwed into the fastening hole 201 from the state of FIG. 4, the inclined surface 410 becomes the arcuate curved surface of the raised portion 520 before the screwing of the connector 400 is completed as shown in FIG. Will be contacted first.

  Thereafter, while the connector 400 is further screwed down, the inclined surface 410 slides down the curved surface of the raised portion 520 and descends to the state shown in FIG. In the state shown in FIG. 5B, that is, in the state where the coupling 400 has been screwed, the inclined surface 410 is located further below the lower end of the original raised portion 520 (see FIG. 5A). The mounting portion 510 is compressed between the lower end of the connector 400 and the protrusion 210.

  In the process in which the inclined surface 410 is lowered from the state of FIG. 5A, the raised portion 520 is pressed by the inclined surface 410 and moves to the power supply line W side, and the inclined surface 410 is originally formed as shown in FIG. The raised portion 520 is pressed by the inner peripheral surface of the connector 400 and is pushed toward the power line W while being positioned below the lower end of the raised portion 520 (see FIG. 5A). Will do.

  As shown in FIG. 5A, the insertion portion 530 has a configuration in which a protruding portion 531 is formed inside the power line passage hole 211 and extends from the mounting portion 510 and is inserted into the power line passage hole 211. Formed in different forms. As shown in FIG. 4, the inner peripheral surfaces of the insertion portion 530 and the mounting portion 510 have inner diameters of the same size. Below, for easy understanding, a hole formed in the inner peripheral surface of the mounting portion 510 and the insertion portion 530 and into which the power supply line W is inserted is referred to as a 'power supply line insertion hole 501'.

  A protruding portion 531 that is in close contact with the power supply line W is formed on the inner peripheral surface of the insertion portion 530. The protruding portion 531 is formed in a form in which an arc-shaped cross section that protrudes from the inner peripheral surface of the insertion portion 530 toward the power supply line W is continuous along the circumferential direction around the screwing shaft of the connector 400. The shortest inner diameter of the protruding portion 531 is formed smaller than the outer diameter of the power line W.

  As shown in FIG. 5A, the protrusion 531 is pressed in the radial direction of the power line W by the outer peripheral surface of the power line W with the power line W inserted into the power line insertion hole 501. Partly elastically compressed. Therefore, the upper side and the lower side of the power supply line insertion hole 501 are sealed from each other with the protrusion 531 as a reference, and the movement of moisture through the power supply line W and the packing 500 is blocked.

  In this state, the insertion portion 530 excluding the protruding portion 531 and the inner peripheral surface of the mounting portion 510 maintain a state of being slightly separated from the outer peripheral surface of the power supply line W. Therefore, the process of inserting the power supply line W into the power supply line insertion hole 501 is facilitated when the converter 200 and the junction box 300 are connected using the connection tool 400.

  As shown in FIG. 5B, when the screwing of the connector 400 is completed, the raised portion 520 is pressed by the inner peripheral surface of the connector 400 and is pressed to the power line W side. The mounting portion 510 formed integrally with the raised portion 520 is also pushed together with the raised portion 520 toward the power line W, so that the inner peripheral surface of the mounted portion 510 is in close contact with the power line W.

  As shown in FIG. 1, the waterproof device for industrial LED explosion-proof lamp disclosed in Korean Patent No. 1370127 has a waterproof packing when its upper edge is pressed by the fastening force of the wire guide tube. While the upper edge of the wire is compressed downward by the wire guide tube, the upper portion of the wire guide hole moves slightly toward the edge, and a gap is formed between the wire guide hole and the wire. It was. Moisture easily penetrates through gaps, so if an explosion-proof light equipped with a waterproof device of Korean Patent No. 1370127 is installed in a humid environment exposed to rainwater, failure or accident due to moisture penetration may occur Is expensive.

  In the waterproof performance improved explosion-proof lamp 10 of the present invention, the raised portion 520 is pressed by the inner peripheral surface of the connector 400 in the process in which the connector 400 is screwed into the fastening hole 201 as described above, so By being pushed, the mounting portion 510 formed integrally with the raised portion 520 is also pushed together with the raised portion 520 to the power supply line W side so that the inner peripheral surface of the mounting portion 510 is in close contact with the power supply line W. Thus, the problem of the prior art in which a gap is formed between the wire guide hole and the wire while the upper end edge of the waterproof packing is compressed downward by the wire guide tube is completely solved.

  The waterproof performance improved explosion-proof lamp 10 of the present invention is one step further in solving the problems of the prior art, and is a part of the mounting portion 510 that is rather separated in the process of compressing the edge of the packing 500 by the connector 400. When the peripheral surface is brought into close contact with the outer peripheral surface of the power line W and the contact area of the packing 500 is increased, the power line W is connected to the packing 500 with the frictional force between the power line W and the packing 500 minimized. The power line W can be easily inserted into the power line insertion hole 501, and the frictional force between the power line W and the packing 500 can be maximized in the process in which the connector 400 is screwed together. It will be possible to completely block the passage of moisture through.

  As shown in FIG. 5B, the inner peripheral surface of the mounting portion 510 and the protruding portion 531 that are in close contact with the power supply line W due to a step between the inner peripheral surface of the mounting portion 510 and the protruding portion 531. A water isolation space 502 surrounded by the power supply line W and the packing 500 is formed between them.

  As shown in FIG. 5A, between the inner peripheral surface of the mounting portion 510 that is in close contact with the power supply line W and the protruding portion 531, the inner peripheral surface of the packing 500 has a moisture isolation space 502. A moisture absorber 550 that absorbs the infiltrated moisture can be attached. Therefore, even if moisture penetrates into the moisture isolation space 502, the moisture absorber 550 immediately absorbs the penetrated moisture, and the moisture is prevented from moving beyond the moisture isolation space 502.

  The moisture absorber 550 can be made of a super absorbent polymer or the like. A superabsorbent resin is a synthetic polymer substance that has a function of absorbing pure water 500 to 1000 times its own weight. After absorbing water, it quickly changes to a gel state and then changes to a gel state. Does not drain much water under pressure. The superabsorbent resin is a known technique, and detailed description thereof will be omitted.

  As shown in FIG. 7, a convex portion 511 that is in close contact with the power supply line W can be formed on the inner peripheral surface of the mounting portion 510. As shown in FIG. 7B, the moisture isolation space 502 is formed between the protruding portion 531 and the protruding portion 511 (by a step between the protruding portion 511 and the inner peripheral surface of the mounting portion 510). 5 (b) is advantageous in that the volume of the moisture absorber 550 attached to the inner peripheral surface of the packing 500 can be increased between the protruding portion 531 and the protruding portion 511. There is.

  As shown in FIGS. 4 and 5, the engaging portion 540 is configured to prevent the packing 500 from moving in the vertical direction (in the screwing axis direction of the connecting device 400) due to the pressing of the connecting device 400, and extends from the insertion portion 530. Thus, the projection 210 is in close contact with the projection 210 on the side opposite to the mounting portion 510 with the projection 210 as a reference.

  A moisture isolation space 503 surrounded by the packing 500 and the protrusion 210 is formed between the mounting portion 510 and the engaging portion 540. Between the mounting portion 510 and the engaging portion 540, a moisture absorber 550 that absorbs moisture penetrating the moisture isolation space 503 can be attached to the outer peripheral surface of the packing 500. Therefore, even if moisture penetrates into the moisture isolation space 503, the moisture absorber 550 immediately absorbs the penetrated moisture, and the moisture is prevented from moving beyond the moisture isolation space 503.

  The connection tool 400 is screwed to the lower end of the junction box 300 to form a coupling hole through which the power line W passes. A screw thread into which the connector 400 is screwed is formed on the inner peripheral surface of the coupling hole, and a step portion to which the sealing packing 600 is attached is formed below the screw thread inside the coupling hole. The step portion is formed in a ring shape protruding in the radial direction from the inner peripheral surface of the coupling hole. A central portion of the step portion forms a power line passage hole through which the power line W passes.

  As shown in FIG. 6, the sealing packing 600 is configured to block the passage of moisture between the power line W and the junction box 300 in the coupling hole, and includes a mounting portion, a raised portion, an insertion portion, and an engagement portion. Part.

  The sealing packing 600 is formed in the same form as the packing 500, and the coupling hole and the stepped portion are formed in the same structure as the fastening hole 201 and the protrusion 210. Therefore, the description regarding the mounting portion, the raised portion, the insertion portion, and the engaging portion of the sealing packing 600 is substantially the same as the description regarding the mounting portion 510, the raised portion 520, the inserting portion 530, and the engaging portion 540 of the packing 500, only by reversing only in the vertical direction. Therefore, the detailed description thereof will be omitted.

  As shown in FIG. 3, on the outer peripheral surface of the connector 400, an annular protrusion is pressed from both directions by the converter 200 and the junction box 300 while the connector 400 is screwed into the fastening hole 201 and the coupling hole in both directions. Part 420 is formed. If the ring-shaped protrusion 420 is pressed in both directions by the converter 200 and the junction box 300 in a state where the connector 400 is screwed into the fastening hole 201 and the coupling hole in both directions, the converter 200 is engaged by the screwing force of the connector 400. In addition, since the outer peripheral surface of the junction box 300 and the ring-shaped protrusion 420 form a close contact surface on both sides, moisture penetration from the outside to the coupling hole and the fastening hole 201 is firmly prevented.

  According to the present invention, the contact area between the packing and the power line increases in the process of compressing the edge of the packing by the coupling tool, so that even if it is provided in a humid environment exposed to rainwater, a malfunction or accident due to moisture penetration. It is possible to provide an explosion-proof light with improved waterproof performance that can prevent the above-described phenomenon.

  While specific embodiments of the invention have been described and illustrated above, the invention is not limited to the described embodiments and various modifications and variations can be made without departing from the spirit and scope of the invention. It is obvious to those skilled in the art that this is possible. Therefore, such modifications or variations should not be understood individually from the technical idea and viewpoint of the present invention, and the modified embodiments should belong to the claims of the present invention.

10: Explosion-proof lamp 100: Body 200: Converter 201: Fastening hole 210: Protrusion 211: Power line passage hole 300: Junction box 400: Connector 401: Hollow portion 410: Inclined surface 420: Ring-shaped protrusion 500: Packing 510: Mounting part 511: Protruding part 520: Raised part 530: Insertion part 531: Projection part 540: Engagement part 501: Power supply line insertion hole 502, 503: Moisture isolation space 550: Moisture absorber 600: Sealing packing W: Power supply line

Claims (10)

A body with a lamp that emits light;
A converter for converting electric power supplied to the body;
A junction box electrically connected to the converter by a power line;
A coupler in which the converter and the junction box are mechanically coupled, and a hollow portion through which the power line passes is formed; and
In the fastening hole of the converter to which the connector is screwed, the passage of moisture through the power line and the converter is blocked, and an edge is attached by the connector in a state of being attached to the protrusion of the converter. Including packing to be compressed,
The waterproof performance improved explosion-proof lamp, wherein an area of the packing that is in close contact with the outer peripheral surface of the power supply line is increased even when an edge is compressed by the connector. The packing is
A mounting portion mounted on the protrusion and having an inner peripheral surface separated from the power line;
A protruding portion that protrudes from the mounting portion to the opposite side of the projecting portion, and is pressed by the inner peripheral surface of the connector in the process of compressing the mounting portion by the connector;
Including an insertion portion extending from the mounting portion and inserted into a power line passage hole in the center of the protrusion, and an inner peripheral surface thereof being in close contact with the power line;
2. The device according to claim 1, wherein even if the mounting portion is compressed by the connector, the raised portion is pushed toward the power supply line, and an inner peripheral surface of the mounting portion is in close contact with the power supply line. Explosion-proof light with improved waterproof performance. The raised portion is formed in a form in which an arc-shaped cross section projecting from the mounting portion toward the connector is continuous along a circumferential direction around a screwing shaft of the connector,
The waterproof performance-enhanced explosion-proof lamp according to claim 2, wherein an inclined surface that slides on a curved surface of the raised portion is formed between an end portion of the connector and an inner peripheral surface. A protrusion that is in close contact with the power supply line is formed on the inner peripheral surface of the insertion portion,
Due to the step between the inner peripheral surface of the mounting portion and the protruding portion, the inner peripheral surface of the mounting portion that is in close contact with the power supply line and the protruding portion are surrounded by the power line and the packing. The waterproof performance improved explosion-proof lamp according to claim 2, wherein a moisture isolation space is formed.   Between the inner peripheral surface of the mounting portion and the projecting portion that are in close contact with the power line, a moisture absorber that absorbs moisture penetrating the moisture isolation space is attached to the inner peripheral surface of the packing. The explosion-proof light with improved waterproof performance according to claim 4. A protrusion that is in close contact with the power supply line is formed on the inner peripheral surface of the insertion portion,
A convex portion that is in close contact with the power supply line is formed on the inner peripheral surface of the mounting portion,
The waterproof performance improved explosion-proof lamp according to claim 2, wherein a moisture isolation space surrounded by the power line and the packing is formed between the protrusion and the protrusion.   The moisture absorber which absorbs the moisture which permeated the moisture isolation space is attached to the inner peripheral surface of the packing between the protruding portion and the protruding portion. Explosion-proof light with improved waterproof performance. The packing includes an engaging portion that extends from the insertion portion and is in close contact with the protrusion on the side opposite to the mounting portion with respect to the protrusion.
The waterproof performance improved explosion-proof lamp according to claim 2, wherein a moisture isolation space surrounded by the packing and the protrusion is formed between the mounting portion and the engaging portion.   The waterproof according to claim 8, wherein a moisture absorber that absorbs moisture penetrating into the moisture isolation space is attached to the outer peripheral surface of the packing between the mounting portion and the engagement portion. An improved explosion-proof light. In the joint box of the junction box to which the connector is screwed, the passage of moisture through the power line and the junction box is blocked and screwed in a state of being attached to the step portion of the junction box. A seal packing whose edges are compressed by the connector
An annular protrusion is formed on the outer peripheral surface of the connector, and the connector is pressed in both directions by the converter and the junction box while being screwed into the fastening hole and the coupling hole in both directions. The explosion-proof light with improved waterproof performance according to claim 1.