KR830002862Y1 - Fire Protection Barrier Assemblies for Electrical Cables - Google Patents

Abstract

No content.

Description

Fire Protection Barrier Assemblies for Electrical Cables

1 is a front view of the fire barrier barrier assembly is removed several end plates according to the present invention.

2 is an exploded view, partly in cross section, with the frame for the fire barrier barrier assembly partially assembled;

3 is a side view of the fire barrier assembly according to the present invention.

4 is a cross-sectional view taken along line 4-4 of FIG.

5A and 5B are cross-sectional views showing two filler plates of different sizes of elastic-expandable material.

5C is a front view of an elastic expandable plate having semi-cylindrical grooves on opposite opposite sides.

5d-5i are front views showing pairs of plates of elastic-expandable material of various sizes in which cylindrical passages of different diameters are made.

The present invention relates to a fire barrier barrier assembly used as a through hole of one or more electrical cables, and more particularly to a novel structure of a frame and sealing element for making the fire barrier described above.

Williams, U.S. Patent No. 1,851,940 discloses a closure, such as a conduit, through which an electrical cable passes, in which case a bulkhead made of one or more elastic materials with a cutout for receiving the cable or The plug is inserted into the conduit to fit snugly around the cable. The pair of end plates are then bolted together and tightened on opposite sides of the bulkhead or plug to tightly bind the elastic material to the conduit wall and the outer surface of the cable.

Bratberg, US Pat. No. 2,732,226, relates to a pressure-resistant packing assembly of conductors that penetrate walls, which consists of short rectangular tubes, some of which are filled with elastic blocks of various sizes. Adjacent blocks are provided with complementary grooves that form cylindrical passages for electrical conductors of a certain size, and some blocks are not provided with holes and merely serve as filler. After all the blocks and cables are assembled in the desired relationship, the final compression seal is achieved by compressing the blocks perpendicularly to the cable with a common plate between the electrical conductors, the elastic blocks and the tubes. Appropriate provisions are then made to fill the remaining gap between the opposite sides of the plate and tube.

U.S. Pat. No. 3,976,825 to Anderberg relates to a through passage of an electrical cable that is fired at a predetermined temperature and sealed against gases and liquids. The cables run through the ceiling, floor or wall openings, and a pair of complementary guide strips, each with semi-cylindrical grooves, surround each cable. In addition, filling members that fit together are provided to completely fill the openings. Since the filling member, the guide strip or the cable is not compressed, each of these members is easily dismantled to change the structure and add or subtract the cable through the opening.

Since the guide strip and the filling member are made of a material having a high volume expansion coefficient, in case of a fire, the guide device and the filling member are expanded and tightly sealed in the frame and against the cable. One end of the assembly may be covered with some material to seal the space between the strip and the cable in a sealed manner against gas and liquid

Bradley, US Pat. No. 4,061,344, relates to a facility that penetrates barriers to provide passageways for pipes, cables, or conduits. According to one example of this patent, a plurality of layers or plates of expandable material are alternating with one or more layers or layers of elastic sealing material. A pair of rigid compression plates are provided on opposite sides of the assembly and are fixedly fixed together by bolts passing through the assembly. One or more openings may be provided through multiple layers or plates for passages, such as cables. The rigid compression plate may be covered with an intumescent material, and when the rigid compression plates are tightened together, the elastic plates expand to tightly tighten the walls of the openings and the cables passing through them. Elastic materials are sealed against gases and liquids at room temperature, and when exposed to elevated temperatures, the expandable materials expand to compensate for breakage or shrinkage of the elastic materials and insulators surrounding the electrical cable, providing a tight seal between the openings and the conductors of the electrical cable. Keep it. In the example according to this patent, a single dissimilar member consisting of a sealing material and an expandable material is arranged between two compression plates.

The present invention is directed to a novel and improved fire barrier barrier assembly for use with electrical cables, etc., penetrating through the opening of a firewall. Multiple plate assemblies of various thicknesses, each configured to be interconnected by an adjustable connecting device, each having a plate of elastic-expandable material and a pair of compression plates arranged at opposite ends thereof, are arranged in a firewall within a straight frame. It is arranged side by side vertically. Each plate is slidably connected to the frame by the connection of the protrusion and the groove. At least one pair of plate members is provided with a semi-cylindrical groove and the at least one pair of plate assemblies placed side by side in the frame allows at least one cylindrical passageway to receive the cables passing therethrough. A plurality of cylindrical passages of the same radius may be provided in the at least one pair of plate-shaped members described above, and another pair of plate-shaped members may be provided with one or more cylindrical passages having different radii. The other plate member is provided with a semi-cylindrical groove on the opposite surface thereof, and the other plate member serving as the filler member has no groove at all.

When the frame enclosed in a straight line is completely filled with a plate-like assembly and one or more cables are placed in each passageway, the connections between the end plates are adjusted to tighten each pair of end plates toward each other so that the elastic-inflatable plate expands to the frame, adjacent It is sealed to a board | plate and the cable which penetrates this. The frame enclosed in a straight line may also be completely filled with one plate assembly or a plurality of plate assemblies which are not provided with grooves for accommodating cables or the like. All end plates disposed on one side of the frame are sized to prevent entry into the frame, while the end plates at the opposite ends of each plate assembly are sized to be screwed into the frame. The outer surfaces of the end plates and frames are covered with an intumescent material and additionally thermally insulated.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

The fire barrier assembly 10 according to the present invention is adapted to be placed in the opening 12 of the firewall 14. Firewalls include ceilings, floors or other structures that act as fire barriers.

The fire barrier assembly 10 consists of a frame 16 enclosed in a straight line that can be fabricated to any suitable size. The frame 16 consists of two end plates 18 and 20 and two elongated side plates 22 and 24 in order to easily produce the frame in various sizes. The end plates 18 and 20 are provided with through holes 26 and 28 of the bolts 30 and 32 which are screwed together with the screw holes 34 and 36 to fix the end plates to the side plates. The end plates 18 and 20 are preferably of one size, while the side plates 22 and 24 are of various sizes so as to be frames surrounded by straight lines of different sizes. The plate assembly made to be inserted into the frame is preferably the same height but varies in thickness as described below. Thus, the side plates 22 and 24 of different lengths can be used to vary the number of plate assemblies that can be accommodated in the frame.

A plurality of openings 38 are provided in the peripheral flanges of the frame 16 for passage of the bolts 40 to secure the frame 16 to the firewall 14.

A plurality of plate assemblies 42 are installed side by side in the openings formed by the frame 16. Each plate assembly 42 can vary in width as well as the number and size of grooves that receive the cable, but the configuration of a representative plate assembly is best seen in FIG. Each plate assembly 42 consists of a plate or blocks 46 of elastic-expandable material, the composition of which will be described in detail later, with plate 46 along the length of the top and bottom surfaces of plate 46. One or more ribs or protrusions 48 are formed. Between the ribs 50 of the side plate members 22 and 24 such that the width of each rib 48 is connected by protrusions and grooves to slidably support each plate-like assembly 42 within the frame 16. Slightly smaller than the distance

As best shown in FIGS. 1 and 5, the plate of elastic-expandable material may vary in width and may or may not be provided with various semi-cylindrical grooves. The plate 46 as shown in Figs. 4 and 5d, 5f, 5g, 5h and 5i is provided with parallel semi-cylindrical grooves 52 extending in the longitudinal direction only on one side of the plate.

When these two plates are placed adjacent to each other in the frame 16, the semi-cylindrical grooves form a plurality of cylindrical passages through the frame completely.

Such a cylindrical passage allows for receiving an electrical cable 54 of a diameter approximately equal to the diameter of the cylindrical passage as shown in FIG. The plate 46 may be adjusted around the cable before insertion into the frame or the cable may be inserted through the cylindrical passage after the plate is installed in the frame 16. The latter method is very difficult due to the frictional force and it is a preferred method to assemble before inserting into the frame.

The number of grooves in each plate and the thickness of the plate will vary depending on the diameter of the grooves formed in the plate. The thicker plates have one or more ribs 48 on the top and bottom, so that all the spaces between the ribs 50 of the frame are filled.

The plate 46 ', as shown in FIG. 5E, has a plurality of smaller diameter grooves 52', and the grooves are thus provided staggered on opposite sides of the plate. In addition, the plate 46 "as shown in FIG. 5C shows a plurality of small diameter grooves 52" provided on the opposite side of the plate, and the grooves are disposed directly opposite each other. This, of course, corresponds only to very small diameter grooves, with sufficient material disposed between the facing grooves. The plate 46 '"as shown in Figs. 5A and 5B is not provided with any grooves at all, and serves as a filling work plate. Therefore, according to the number and size of cables passing through the frame 16, Various combinations of plates can be assembled as shown in Figure 6. Although only six electrical conduits are shown in the cylindrical passageway of FIG. Of course, if two adjacent plates form multiple cylindrical passages and there are not enough cables or conduits to fill all the passages, a cylindrical filler plug of the same material as the plate 46 can be inserted into the passage. .

Once the assembly of elastic-expandable plates, cables and conduits is assembled into the frame and completely fills the frame, the assembly of the assembly is compressed to tightly bind the elastic-expandable material to the frame and to each other and to the cables and conduits through it. It is necessary to apply pressure on both sides of the piece. In order to do this, each plate assembly 42 is provided with a pair of end compression plates 56 and 58 at opposite ends of the plate assembly 42. Each plate of elastic-expandable material is formed with two through holes 53 and 55, whether it is a grooved plate or a filler plate. As best shown in FIG. 4, the pair of bolts 60 and 62 are rotatably secured to the top and bottom ends of the compression plate 58 so that the passages 53 and 55 and the compression plate 56 can be secured. Through the corresponding openings at the ends, the nuts 64 and 66 are screwed into the projecting ends of the bolts 60 and 62. As best shown in Figs. 1 and 4, each compression plate is larger than the vertical size of the opening of the frame 16 so that each compression plate has side members 22 and 24 of the frame 16. Abuts on the outside. On the other hand, since the vertical size of the compression plate 58 is smaller than the distance between the upper ribs 50 and the opposing ribs 50 of the bottom members 22 and 24, the compression plate 58 is the frame 16 I can go inside. End compression plates 56 and 58 are preferably assembled by assembling elastic-expandable plate 46 prior to insertion into frame 16. However, the nuts 64 and 66 are retracted to some extent so that the plate 46 is not compressed at all.

After the linearly enclosed opening of the frame 16 is completely filled with the plate-like assembly 42, the nuts 64 and 66 in each assembly 42 are tightened equally and toward the compression plate 56 toward the compression plate 58. And compresses the elastic-expandable material of the plate 46 to tightly seal the adjacent plate, frame and conduit through it. In fact, each plate assembly 42 can be equally compressed by rotating the nuts 64 and 66 until the bolts 60 and 62 all protrude equally. During construction of a building or the like where the fire barrier assembly 42 is installed, various cables are passed through the open frame until the construction work is almost complete. The cable or conduit or the like can then be assembled in the opening of the frame 16 together with the plate assembly 42. Since the plate is not pressurized until the work is completely finished, it is easy to make the final change by simply pulling out the required plate assembly 42, removing the cable or additionally penetrating the cable and then reassembling the appropriate plate assembly 42. Can be done.

As mentioned above, the various plates 46 are made of an elastic-expandable material. This material is preferably a compound of neoprene rubber and natural refueling (CaCO ₃ ) filler. When neoprene is acidified or burned by heat, it generates hydrogen chloride, which forms hydrochloric acid with water. Natural fighting fillers react with hydrochloric acid to neutralize it to form calcium chloride and carbon dioxide. Calcium chloride is highly deliquescent, and the carbon dioxide formed expands rubber due to heat expansion.

Under ordinary conditions, the elastic-expandable compositions according to the present invention form an airtight barrier when compressed to prevent smoke or other passage. When a fire breaks down and destroys the insulation around the electrical conductors that penetrate the fire barrier, the expansion of neoprene rubber exerts radial pressure on the electrical cables to drive the melted wire insulators out and the conductors into a tightly packed bundle of copper. It prevents the passage of any gas or flame from the tightened fire to the cooling side of the device. In order to further improve the efficiency of the fire barrier assembly, the outer surfaces of the frame and the compression plate may be covered with a layer of intumescent material 70.

As shown in FIG. 4, the material 70 is attached to their outer surface after assembly of the frame 16 and the compression plate 50. However, according to the present invention, it is sufficiently anticipated that a similar coating of expandable material can be provided on the exposed surface of the compression plate 58 and the frame 16 opposite the wall 14 in the same manner as shown. After assembling the plate assembly 42 to the frame 16 and attaching the frame to the wall, the surface of the frame 16 and the surfaces of the compression plates 56 and 58 that are exposed after assembly are prepared before assembly, rather than covering the expandable material. The coating can be removed to remove the coating step from the site. It can also be expected that there is no material 70 at all.

In addition, the illustrated and described structures may be used as a vapor barrier, a waterproof barrier, or a barrier against dirt and dust without any modification. If the possibility of strong heat is not a factor, any suitable elastomer may be used without the intumescent filler.

Claims (1)

A frame 16 having an opening enclosed in a straight line, and a plurality of plate-like assemblies 42 arranged side by side which can be removed within the frame, each plate-assembly comprising an elastic plate 46, each end of the elastic plate. Compression plates 56 and 58 in the chamber, adjustable connectors 60 and 62 for connecting the plates together to move away from each other towards each other, formed along opposite sides of the elastic plate between the compression plates A fire barrier barrier assembly (10) comprising at least a pair of ribs (48) and a plurality of spaced ribs (50) formed on opposite sides of the opening to receive ribs of the plate assembly therebetween.