KR102095766B1 - Tilting type explosion-proof electric pipe - Google Patents

Abstract

The present invention relates to a tilting type explosion-proof electric pipe, which can apply a tilting method to an industrial plant and the like in an explosion hazard area requiring a high-place work, thereby allowing work to be safely performed on the ground. To this end, the tilting type explosion-proof electric pipe of the present invention comprises: a first support pipe (10) which is fixedly installed on the ground; a second support pipe (20) on which an electric product (30) is mounted at the upper end; and a tilting unit (100) which can rotatably connect the first support pipe (10) to the second support pipe (20). Therefore, the first support pipe (10) and the second support pipe (20) are stood in a straight line to support the electric product mounted on the upper end in an installation state, whereas the second support pipe (20) is downwardly tilted to repair the electric product (30) on the ground during maintenance and repair. The tilting unit (100) may comprise: a tilting lower unit (100a) which is fixated at the inclination of 30-60° at the upper end of the first support pipe; a tilting upper unit (100b) which is fixated at the inclination of 30-60° at the lower end of the second support pipe; and a fastening means (100c) which is configured to fasten the tilting lower unit (100a) to the tilting upper unit (100b).

Description

Tilting type explosion-proof electric pipe

The present invention relates to explosion-proof electric piping that can be used in explosion-hazardous areas, and more specifically, by applying a tilting method in industrial plants, etc., in explosion-hazardous areas where aerial work is required, a tilting method to safely work on the ground. Explosion-proof type electric piping.

In general, explosion-proof (explosion-proof, anti-explosion) of electrical equipment (equipment) is caused by electrical products used in hazardous areas such as oil refineries, petrochemical plants, and gas manufacturing plants. It is to prevent explosion accidents caused by ignition or ignition of steam or dust. Explosion-proof structures of electrical equipment used in hazardous areas include pressure-resistant explosion-proof structures, intrinsically safe explosion-proof structures, and pressure explosion-proof structures. Flame-proof (d) explosion-proof structure (d) prevents the container from withstanding the pressure when an explosive gas or steam explodes inside the container, and also prevents the electric equipment from being ignited by external explosive gas through joints, openings, etc. It is protected by putting it in a special container with a completely enclosed structure, so that the ignition source generated inside the container does not ignite the dangerous source outside the container, and in the event of an explosion, it can withstand the explosion pressure generated at this time. The intrinsic safety type (i) is a structure that prevents or blocks accidents by limiting electrical energy generated by sparks, short circuits, etc. by electricity (such as electrical equipment and windings) in explosion-proof areas.

On the other hand, electric piping used in industrial sites handling dangerous substances with explosive risks such as petroleum or chemicals uses explosion-proof electric piping in accordance with various explosion-proof standards (IEC 60079, etc.) to prevent various explosion accidents. . For example, in an industrial plant, to install lights, cameras, speakers, etc., at heights of 20 to 30 m or more from the ground, column-type electric piping is used. Conventional electric piping is structured in a structure that cannot be tilted in order to meet explosion-proof standards. There is a risk of falling, etc., and there is a problem in that maintenance work on the site is difficult because it is also prohibited to sue using a ladder.

KR 10-1608174 B1

The present invention has been proposed to solve the conventional problems as described above, and the subject of the present invention is a tilting method capable of safely working on the ground by applying a tilting method in an industrial plant or the like in an explosion-hazardous area where aerial work is required. To provide explosion-proof electrical piping.

This embodiment discloses an explosion-proof electrical piping of a tilting method, which enables a safe operation on the ground by applying a tilting method.

Explosion-proof electric piping of the disclosed tilting method is a tilting connecting the first support pipe fixed to the ground, the second support pipe equipped with electrical products on the top, and the first support pipe and the second support pipe to be rotatable In the installation state including the part, the first support tube and the second support tube are erected in a straight line to support an electric product mounted on the top, and during maintenance, the second support tube is tilted downward to make the electricity on the ground. The product can be repaired.

The tilting unit fastens a lowering portion fixed at a predetermined angle of inclination to the upper end of the first support tube, a tilting upper portion fixed to a lower angle of the second support tube at a predetermined angle, and a lowering portion of the tilting portion and the upper portion of the tilting portion. It can be configured as a fastening means for.

In addition, the tilting portion is a first disc-shaped plate fixed to the upper end of the first support tube at a predetermined angle of inclination, and a second disc-shaped plate fixed to the lower end of the second support tube at a predetermined angle of inclination, A clamp for fastening the first disc-shaped plate and the second disc-shaped plate, and a first locking plate fixedly installed at a predetermined angle to the first support tube at a predetermined distance from the first disc-shaped plate and , It is composed of a second locking plate formed with a through hole for passing the second support tube, the first disc-shaped plate and the second disc-shaped plate are unevenly coupled, so that the second disc-shaped plate is the second support pipe. Provides a flame passage for explosion-proof while being rotatable, and the first locking plate and the second locking plate are fastened and tilting function It will cost to lock.

The clamp is composed of a pair of semi-circular rings having an inclined groove for fitting the first disk-shaped plate and the second disk-shaped plate at an inner center, and the pair of semi-circular rings have one end combined with a white paper, and the other end It is fastened by a bolt method or a clip method so that the first disc-shaped plate and the second disc-shaped plate can be press-closed by the inclined groove when fastening.

The tilting portion may further include a stopper for limiting the rotation angle of the second disc-shaped plate to 180 °.

Explosion-proof electric piping according to an embodiment of the present invention is a tilting method so that after installation and maintenance, it can be tilted to the ground to work even at a low position, so it is possible to prevent human accidents caused by aerial work and meet various explosion-proof standards. B. There is an effect that can be safely used even in industrial sites that handle hazardous materials such as chemicals and explosion hazards.

In addition, the explosion-proof electric piping of this embodiment has a double fastening structure, which has the advantage of being able to satisfy both characteristics of a trade off relationship such as robustness and tilting convenience.

1 is an installation state diagram of an electric pipe according to an embodiment of the present invention,
2 is a tilting state diagram of an electric pipe according to an embodiment of the present invention,
Figure 3 is an exploded perspective view of the electric pipe tilting unit according to an embodiment of the present invention,
Figure 4 is a combined perspective view of the electric pipe tilting unit according to an embodiment of the present invention,
5 is a cross-sectional view of an electric pipe tilting unit according to an embodiment of the present invention,
6 is an example of a clamp of an electric pipe tilting part according to an embodiment of the present invention,
7 is a horizontal view for explaining the explosion-proof structure in the electric pipe tilting unit according to an embodiment of the present invention,
8 is a vertical view for explaining the explosion-proof structure of the electric pipe tilting unit according to an embodiment of the present invention.

The present invention and the technical problems achieved by the practice of the present invention will be more apparent by the preferred embodiments of the present invention described below. The following examples are merely illustrated to illustrate the present invention, and are not intended to limit the scope of the present invention.

First, the tilting type explosion-proof electric piping according to an embodiment of the present invention is installed at an industrial plant site so that a power line and a signal line for supplying electricity to electrical products such as a lighting lamp, surveillance camera, speaker, etc., can be wired. It basically has explosion-proof properties for use in hazardous areas. In this embodiment, the electric piping equipped with a lighting lamp will be mainly described, focusing mainly on the tilting structure and the explosion-proof structure of the tilting part.

1 is an installation state diagram of an electric pipe according to an embodiment of the present invention, and FIG. 2 is a tilting state diagram of an electric pipe according to an embodiment of the present invention.

Tilting type explosion-proof electric piping (1) for supplying electricity to the lighting according to an embodiment of the present invention, as shown in Figures 1 and 2, the lighting fixture 30 and the first support tube fixedly installed on the ground (10), the second support tube 20, the lighting fixture 30 is mounted on the top, the first support tube 10 and the tilting unit 100 for connecting the second support tube 20 to be rotatable It consists of. And in the installation state, the lamp 32 installed on the top as shown in FIG. 1 provides the lighting function in the aerial area, and during maintenance, as shown in FIG. 2, approximately 90 ° downwards. It is tilted so that the worker can repair the lamp 32 on the ground.

1 and 2, the first support pipe 10 is mechanically fixedly installed on a structure such as a floor at an industrial plant site, and a hole for wiring an electric line or a signal line is formed therein. The first support tube 10 may have a base portion formed so that the lower end is easily supported by the structure, and may have a single-layer structure differently from the lower tube diameter and the upper tube diameter. At the top of the first support tube 10, the tilting lower portion 100a is fixed at an inclination of approximately 30 to 60 °.

The second support tube 20 has a lighting fixture 30 attached to the top, and a hole for wiring an electric wire or a signal wire is formed therein. The hole of the second support tube 20 communicates with the hole of the first support tube 10 through the tilting part 100 to connect a power line or the like to the lighting fixture 30. In addition to the lighting luminaire, other electrical appliances, such as a camera or speaker, may be attached to the upper end of the second support tube 20 depending on the site conditions, and preferably, electrical appliances having explosion-proof characteristics are used. The tilting upper part 100b is fixed to the lower end of the second support tube 20 at an inclination of approximately 45 °.

The tilting unit 100 includes a tilting lower portion 100a fixed to the upper end of the first support pipe 10, a tilting upper portion 100b fixed to the lower end of the second supporting pipe 20, and a tilting lower portion 100a. It consists of a fastening means (100c) for fastening the tilting top (100b) and in the installation state, the fastening means (100c) securely fixes the tilting bottom (100a) and the tilting top (100b), and then tilts for maintenance. In the case of loosening the fastening means 100c, the tilting lower part 100a is rotated 180 ° to rotate the tilting upper part 100b 180 ° so that the second support tube 20 is inclined 90 ° downward as shown in FIG. 2.

The configurations of the electric piping 1 are preferably made of a solid metal material such as aluminum or stainless steel in order to meet the explosion-proof characteristics required by the explosion-proof standard.

3 is an exploded perspective view of an electric pipe tilting part according to an embodiment of the present invention, FIG. 4 is a combined perspective view of an electric pipe tilting part according to an embodiment of the present invention, and FIG. 5 is an electric pipe tilting part according to an embodiment of the present invention 6 is an exemplary view showing a clamp of an electric pipe tilting unit according to an embodiment of the present invention.

Tilting unit 100 according to an embodiment of the present invention, as shown in Figures 3 and 4, the first disc-shaped plate is fixed to the top of the first support tube 10 at an inclination of 30 ~ 60 ° angle (110), a second disc-shaped plate 120, a ring-shaped clamp 130, a first locking plate 140, and a second fixed plate 20 fixed at an angle of 30 to 60 ° at the bottom of the second support tube 20 It consists of two locking plates (150). In FIG. 3, the first disc-shaped plate 110 constitutes the tilting lower portion 100a, the second disc-shaped plate 120 constitutes the tilting upper portion 100b, and the ring-shaped clamp 130 and the first locking plate ( 140), and the second locking plate 150 constitutes the fastening means 100c.

When the electric pipe is installed, the tilting unit 100 secures the first support pipe 10 to the structure at the floor of the site, and then rings the ring with the first disc-shaped plate 110 and the second disc-shaped plate 120 unevenly coupled. First fastening the first disc-shaped plate 110 and the second disc-shaped plate 120 with 130, the second support tube 20 passes through the through hole 152 of the second locking plate 150 After being possible, the second locking plate 150 is fastened to the first locking plate 140, the bolt 162, and the nut 164 on the second disc-shaped plate 120, and the second locking is performed as shown in FIG. do.

Therefore, the explosion-proof electric piping 1 according to the embodiment of the present invention has a double clamping structure of the ring-shaped clamp 130 and the locking plates 140 and 150, thus satisfying both characteristics of a trade off relationship such as robustness and tilting convenience. I can do it.

3 and 4, the first disc-shaped plate 110 is a circular plate fixed with an inclination of 30 to 60 ° at the top of the first support tube 10, as shown in FIGS. 7 and 8 As shown in the center, a hole of the same diameter as the hole 12 of the first support tube 10 is formed, and three concentric hemispherical grooves 111, 112, 113 are formed sequentially from the inside, and three annular projections 114, 116, 118 ) And the two grooves 115 and 117 form the uneven coupling portion 174.

The second disc-shaped plate 120 is a circular plate fixed with a slope of 30 to 60 ° at the bottom of the second support pipe 20, and as shown in FIGS. 7 and 8, the second support pipe in the center ( A hole of the same diameter as the hole 22 of 20) is formed, and three concentric hemispherical grooves 121, 122, and 123 are sequentially formed from the inside, and two annular protrusions 125, 127 and three grooves 124, 126, 128 are formed. An uneven coupling portion 174 is formed.

The first disk-shaped plate 110 and the second disk-shaped plate 120 are unevenly coupled to each other during installation, as shown in FIGS. 7 and 8, the first o-ring 171 and the second o-ring (172), a metal gasket ring (173), a surface joining area (a), a multi-step joining area (b), and a cylindrical path (c) comprising a flame path (Flame path) consisting of a first disc-shaped plate Based on the (110), the second disc-shaped plate 120 is rotatable.

7 is a horizontal view for explaining the explosion-proof structure in the electric pipe tilting unit according to an embodiment of the present invention, Figure 8 is a vertical view.

7 and 8, the first disc-shaped plate 110 is formed with a concentric first lower hemisphere groove 111 from a central hole, and is spaced apart from the first lower hemisphere groove 111. 2 The lower hemisphere groove 112 is formed, and the third lower hemisphere groove 113 is sequentially formed at a distance from the second lower hemisphere groove 112. The radius of the first lower hemisphere groove 111 and the second lower hemisphere groove 112 is the same, and the radius 113 of the third lower hemisphere groove is larger than the radius of the first and second lower hemisphere grooves 111 and 112 have. Between the third lower hemisphere groove 113 and the first annular protrusion 114, a faceted joint region (a) having a gap of i1 is formed, and then the uneven coupling portion 174 composed of a plurality of protrusions and grooves A multi-step joint (b) having a gap i2 in the horizontal direction is formed, and a cylindrical joint area (c) is formed in the vertical direction.

The second disc-shaped plate 120 is formed with a concentric first upper hemispherical groove 121 from a central hole corresponding to the first disc-shaped plate 110, and spaced apart from the first upper hemispherical groove 121. The second upper hemisphere groove 122 is formed, and the third upper hemisphere groove 123 is sequentially formed at a distance from the second upper hemisphere groove 122. In addition, the radius of the first upper hemisphere groove 121 and the second upper hemisphere groove 122 is the same, and the radius of the third upper hemisphere groove 123 is larger than the radius of the first and second upper hemisphere grooves 121 and 122 It is done. Between the third upper hemispherical groove 123 and the first groove 124, a surface abutment region a having a gap i1 is formed, and then a plurality of protrusions and grooves form a multistep joint region b in the horizontal direction. The cylinder-shaped joint region c is formed in the vertical direction.

Therefore, the first lower hemisphere groove 111 and the first upper hemisphere groove 121 are combined, and the first O-ring 171 for smooth rotation of the first disc plate 110 and the second disc plate 120 ), The second lower hemisphere groove 112 and the second upper hemisphere groove 122 are combined, and the second error for smooth rotation of the first disc-shaped plate 110 and the second disc-shaped plate 120. -A metal gasket ring for forming a ring 172 and adjusting a gap of a flame passage with a ring-shaped metal gasket 176 by combining a third lower hemisphere groove 113 and a third upper hemisphere groove 123 (173).

In addition, in the embodiment, in order to configure the explosion-proof enclosure, the first support side and the second support side are divided into a cemented joint 175 which is a sealed joint in a portion communicating with the cable.

Flame path is a core concept of explosion-proof, and prevents secondary explosions caused by chain reaction with high-pressure, high-temperature gas generated when an explosion occurs inside the explosion-proof enclosure. It is a fine leak passage made to the enclosure joining surface to the extent possible (for example, the joining surface of the first disc-shaped plate and the second disc-shaped plate). At this time, the expansion speed of the explosive gas should be designed to cool down while passing through the flame passage. Usually, the flame passage is made in the gap between the body of the explosion-proof explosion-proof enclosure and the closed cover, or the threaded portion of the joint. The length (L) of the flame path can be different for each measurement point within the same enclosure, so it is measured with the shortest distance between the inside of the enclosure and the outside of the enclosure, and the gap (gap; i) of the flame path is the main body. It refers to the distance (spacing) of the finely-opened part of the part that abuts between and the cover. The length of the flame passage is designed to be a sufficient distance to cool the heat of the explosive gas inside the enclosure, and the gap of the flame passage is designed to trap the explosive gas and gradually escape.

In addition, the length and gap of the flame path have no choice but to be related, and this correlation is measured for each gas class and is defined as Maximum Experimental Safe Gaps (MESG). In other words, MESG fixed the flame path length (L) to 25 mm and tested 10 times according to the conditions specified in IEC 60079-1A to determine the proper flame path gap for each gas class. It is the maximum gap where the flame does not spread. For example, IIC grade is 0.5mm or less, IIB grade is 0.5 ~ 0.9mm, and IIA grade is 0.9mm or more. The larger the enclosure capacity, the more dangerous the MESG value, and the longer the flame path, the lower the risk, the larger the MESG value.

In addition, the flame path includes the most common flanged joints, spigot joints, and threaded joints. The flame path of the flanged joint is a straight line, the Spigot Joint is a right angle, and the Threaded Joint creates a circular flame path along the thread. In the threaded joint method, since the thread acts as a flame path, the pitch of the thread becomes a gap in the flame path, and how many threads are combined (at least 5 times) of the flame path. Determine the length.

In the embodiment of the present invention, the flame passage is a multi-step joint formed in the horizontal direction of the flanged joint region (a) from the metal gasket ring 173 to the uneven coupling portion 174, and the uneven coupling portion 174. (Multi-step Joint) area (b), and the cylindrical joint (Cylindrical Joint) area (c) formed in the vertical direction of the concave-convex portion 174 is composed of a combination, the length of the entire flame passage is face contact (Flanged Joint) area (a), multi-step joint area (b), and the area of the cylindrical logical joint (c). Preferably, when the radius of the first disc-shaped plate 110 and the second disc-shaped plate 120 is R1, the length of the flame passage in the flanged joint region (a) is 1/5 R1 to 1 / 4 R1, and the multi-step joint region b is composed of three or more stages.

Referring back to FIGS. 3 and 4, the clamp 130 has an inclined groove 132a for fitting the first disk-shaped plate 110 and the second disk-shaped plate 120 in the inner center. ) Is formed of a pair of semi-circular rings (132-1,132-2), a pair of semi-circular rings (132-1,132-2), one end of which is combined with white paper (134), and the other end (136-1,136-2) is It is fastened by a bolt method or a clip method so that the first disc-shaped plate 110 and the second disc-shaped plate 120 can be pressed in close contact by an inclined groove 132a. In FIG. 6, (a) is a drawing in which the clamp is released, (b) is a drawing in the engaged state, and (c) is a diagram showing the inclined groove 132a when being fastened.

The first locking plate 140 has a slope of 30 to 60 ° to the first support tube 10 at a predetermined distance downward from the first disc-shaped plate 110 and is parallel to the first disc-shaped plate 110. As a plate-shaped plate to be fixed, a plurality of bolt holes 144 for fastening bolts are formed. The first locking plate 140 has a larger diameter than the first disc-shaped plate 110. In addition, in the embodiment of the present invention, the first locking plate 140 has a disc shape, but other shapes such as a square plate are also possible.

The second locking plate 150 is an independent disc-shaped plate having a through hole 152 for penetrating the second support tube 20 therein, and is formed in the same size and shape as the first locking plate 140. The first locking plate 140 and the bolt 162 can be fastened. The diameter of the through hole 152 of the second locking plate 150 is larger than the diameter of the first support tube and smaller than the diameter of the second disc-shaped plate 150, and when engaged with the first locking plate 140, the second disc-shaped The plate 120 is pressed and fixed in close contact with the first disk-shaped plate 110 so that tilting is impossible.

If you want to tilt for maintenance after installation, first loosen the bolts that fasten both locking plates 140 and 150, and secondly loosen the bolts of the ring-shaped clamp 130 and 180 ° of the second support rod disc 120 By rotating the second support rod 20 to be inclined to the ground at approximately 90 °, it is possible to repair the electrical appliance attached to the upper side of the second support rod 20. After the repair is completed, after the second supporting rod 20 is erected as opposed to when tilting, after the first disc-shaped plate 110 and the second disc-shaped plate 120 are fastened with the ring-shaped clamp 130, the second locking plate Fasten the 150 and the first locking plate 140 with a bolt.

In the above, the present invention has been described with reference to one embodiment shown in the drawings, but those skilled in the art will understand that various modifications and other equivalent embodiments are possible therefrom.

10: first support tube 20: second support tube
30: lighting fixture 100: tilting unit
110: first disc-shaped plate 120: second disc-shaped plate
130: clamp 140: first locking plate
150: second locking plate 162: bolt
171,172: O-ring 173: Metal gasket ring
174: uneven joint 175: cemented joint
176: metal gasket a: face contact area
b: Multi-step joint area c: Cylindrical joint area

Claims (5)

delete delete In the installation state, the first support pipe fixedly installed on the ground, a second support pipe equipped with electrical appliances at the top, and a tilting portion for rotatably connecting the first support pipe and the second support pipe are installed in the installation state. 1 Support pipe and the second support pipe are erected in a straight line to support the electrical appliances mounted on the top, and during maintenance, the second support pipe is tilted downward to allow the electrical appliances to be repaired on the ground. In the explosion-proof electric piping system,
The tilting part
A first disc-shaped plate fixed at a predetermined angle to the top of the first support tube,
A second disc-shaped plate fixed to a lower end of the second support tube at a predetermined angle;
A clamp for fastening the first disc-shaped plate and the second disc-shaped plate,
A first locking plate fixed to the first support tube at a predetermined angle at a predetermined distance from the first disk-shaped plate;
Consists of a second locking plate having a through hole for passing the second support tube
The first disc-shaped plate and the second disc-shaped plate are unevenly coupled so that the second disc-shaped plate is rotatable together with the second support tube while providing a flame passage for explosion protection, and the first locking plate and the Explosion-proof electric piping of a tilting method, characterized in that the second locking plate is fastened to lock the tilting function. The method of claim 3, wherein the clamp
A pair of semi-circular rings having an inclined groove for fitting the first disc-shaped plate and the second disc-shaped plate at the center of the inner side is formed, and the pair of the semi-circular rings has one end coupled with white paper, and the other end is bolted. Tilt-type explosion-proof electrical piping, characterized in that the first disc-shaped plate and the second disc-shaped plate can be press-closed by the inclined groove when fastened by a clip method. The method of claim 3, wherein the tilting portion
Tilting type explosion-proof electrical piping, characterized in that it further comprises a stopper for limiting the rotation angle of the second disk-shaped plate to 180 °.

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