SE1451473A1

SE1451473A1 - Fire stop

Info

Publication number: SE1451473A1
Application number: SE1451473A
Authority: SE
Inventors: Pär Hammarström
Original assignee: Roxtec Ab
Priority date: 2014-12-03
Filing date: 2014-12-03
Publication date: 2016-05-17
Also published as: SE538333C2; WO2016089290A1

Description

10 15 20 25 30 35 in said hole into which it is to be installed. This is a clear advantage if the product is inserted into a hole Where you may need to change hand grip from partly inserted to fully inserted. An outer body having two folding lines allows itself to open more to re- ceive the cable etc. compared to an outer body having a single folding line.

The fire stop of the present invention comprises blocks of intumescent mate- rial. To produce the material in form of blocks can be done relatively easy and at low cost, compared to solutions where the intumescent material is formed into parts con- nected to each other along a folding line or the like. The blocks of intumescent material are to be placed inside the outer body of the fire stop. The intumescent material of the blocks is soft, to yield and be formed around a cable, wire or pipe received inside the fire stop. The arrangement of two blocks of intumescent material also facilitates inser- tion of a cable etc., in that the blocks move apart from each other in an arc when open- ing the outer body due to the two folding lines. Thus, the fire stop of the present inven- tion opens in a far more convenient way to receive a cable, wire, tube or pipe.

Further objects and advantages of the present invention will be obvious to a person skilled in the art when reading the detailed description below.

Brief Description of the Drawings The invention will be explained further below by way of examples and with reference to the enclosed drawings. In the drawings: Fig. l is a perspective view of a fire stop according to the present invention, Fig. 2 is a side view of the fire stop of Fig. l, Fig. 3 is an end view of the fire stop of Figs. 1 and 2, Fig. 4 is an end view of the fire stop corresponding with Fig. 3 but without blocks of intumescent material, Fig. 5 is a side view of the fire stop receiving a cable and in the position as in- stalled in an opening, and Fig. 6 is a sectional view taken along the line A-A in Fig. 5.

Detailed Description As used in this description the expressions "axial", "radial" and similar expres- sions are in view of a cable received inside the fire stop of the present invention. The example shown in the Figs. and as described below refer mainly to transit of a cable, for ease of description. However, a person skilled in the art realizes that the cable could be replaced by a wire, tube or pipe. 10 15 20 25 30 35 ln Fig. 1 one example of a fire stop 1 according to the present invention is shown. The fire stop 1 has two blocks 2 of intumescent material placed inside an outer body. The outer body is formed of a first portion 3, a second portion 4 and a third por- tion 5. Said three portions 3, 4, 5 together form two separate inner spaces 6 for receiving the blocks 2 of intumescent material. One separate block 2 of intumescent material is received in each of the inner spaces 6. The outer body of the fire stop 1 is made of a rubber material. The intumescent material used is relatively soft to yield around a cable etc. received inside the fire stop 1.

The three portions 3, 4, 5 forming the outer body of the fire stop 1, are inte- grated and are connected to each other by means of two hinge parts 7, 8. By means of the hinge parts 7, 8 folding lines are formed between the portions 3, 4, 5 of the outer body. The hinge parts 7, 8 are preloaded in such a way that the portions 3, 4, 5 are urged away from each other. The hinge parts 7, 8 have a spring action and due to said spring action, the three portions 3, 4, 5 of the fire stop 1 are in the positions as shown in the Figs. 1-4 if not affected by any outer forces. As shown in the Figs. a slit is formed be- tween adjacent portions 3, 4, 5 of the outer body of the fire stop 1, by means of the spring action of the hinge parts 7, 8.

At one end of the fire stop 1 each of the three portions 3, 4, 5 of the outer body of the fire stop 1 has a projecting part 15, 16, 17 projecting radially inwards. Walls of the inner spaces are fonned of said projecting parts 15, 16, 17 of the portions 3, 4, 5, which inner spaces 6 receive the blocks 2 of intumescent material. The projecting parts 15, 16, 17 form stops for the blocks 2, in one aXial direction. The projections 15, 16, 17 have a thickness in axial direction. The radially inner side 9, 10, ll of each projection 15, 16, 17 has a rounded form, as seen in cross section. The rounded inner sides 9, 10, 11 of the projections 15, 16, 17 will form a through opening when the fire stop 1 is pushed together, whereby the three portions 3, 4, 5 abut each other. The curvatures of the rounded inner sides 9, 10, 11 are such that the through opening formed will be cy- lindrical having an inner diameter adapted to the outer diameter of the cable to be re- ceived inside the fire stop 1.

The first and third portions 3, 5 of the fire stop 1 are placed at opposite sides of the second portion 4 of the fire stop 1. The first portion 3 has a radial surface 18 ex- tending along the entire axial length of the first portion 3. Also the third portion 5 has a radial surface 19 extending along the entire length of the third portion 5. The radial sur- faces 18, 19 of the first portion 3 and the third portion 5, respectively, are to abut each other when the fire stop 1 is pressed together. When pressed together the fire stop 1 will 10 15 20 25 30 have a cylindrical outer form, by means of the three portions 3, 4, 5. In the open condi- tion of the fire stop 1 there is a gap between the radial surfaces 18, 19 between the first and third portions 3, 5 of the outer body of the fire stop 1. By means of the gap a cable, wire or pipe may be inserted in radial direction into the inside of the fire stop 1.

A number of ?anges 12 are arranged on the radially outer surfaces of the three portions 3, 4, 5 of the fire stop 1. The flanges 12 are arranged at an equal axial distance from each other. The ?anges 12 are arranged in corresponding positions on the three portions 3, 4, 5 of the fire stop 1, whereby the ?anges 12 Will form outer rings when the fire stop 1 is pressed together. The outer diameter of the rings formed by the ?anges 12 is somewhat larger than the inner diameter of an opening to receive the fire stop 1. The ?anges 12 are mainly intended to give a retaining force when the fire stop 1 is placed in an opening. Said retaining force is especially important for vertically placed fire stops 1.

The inner spaces 6 for receiving the blocks 2 of intumescent material are open at one axial end 26. At the other aXial end the inner spaces 6 are restricted by the pro- truding parts 15, 16, 17 of the three portions 3, 4, 5 of the outer body of the fire stop 1.

The inner spaces 6 are defined by the protrusions 15, 16, 17 and the inner surfaces of the three portions 3, 4, 5 of the fire stop 1. The outlines of the inner surfaces of the three portions 3, 4, 5 are adapted to the shape of the blocks 2 of intumescent material. In the shown embodiment each of said blocks 2 of intumescent material have the shape of a rectangular parallelepiped. The first portion 3 of the outer body of the fire stop 1 has two inner walls 21, 22 extending in axial direction from the open axial end 26 of the inner space 6 to the projecting part 15. The inner walls 21, 22 are perpendicular to each other. The second portion 4 has one inner wall 23 extending in axial direction from the open axial end 26 of the inner spaces 6 to the projecting part 16. The third portion 5 has two inner walls 24, 25 extending in axial direction from the open axial end 26 of the inner space 6 to the projecting part 17. The inner walls 24, 25 of the third portion 5 are perpendicular to each other. One edge of the inner wall 23 of the second portion 4 of the outer body of the fire stop 1 is placed adjacent one edge of one of the inner walls 22 of the first portion 3. The opposite edge of the inner wall 23 of the second portion 4 is placed adj acent one edge of one of the inner walls 24 of the third portion 5. When the fire stop 1 is pressed together one of the inner walls 21 of the first portion will coincide with one of the inner walls 25 of the third portion 5. The inner spaces 6 will thereby be formed to receive the two blocks 2 of intumescent material having the shape of a rec- tangular parallelepiped. 10 15 20 25 At the open axial end 26 of the inner space 6 of the fire stop 1, the portions 3, 4, 5 forming the outer body are chamfered. Each chamfer 13 has a straight ring part 14 at the outer end. The ring parts 14 of the portions 3, 4, 5 will form a ring when the fire stop 1 is pressed together. Thus, the end is made with a smaller diameter, followed by a chamfer 13 to the outer full diameter of the outer body of the fire stop. This will sim- plify installation in places e. g. where light is bad or you cannot see the hole into which the product is inserted. It is a tactile function where you can actually feel your way to the insertion point more easily.

In use a cable 20 is to be received inside the fire stop 1, whereby the cable 20 is placed between the blocks 2 of intumescent material. The blocks 2 are placed in the in- ner spaces 6 of the outer body. The fire stop 1 is pre-tensioned to a slightly open posi- tion, Whereby a gap is formed between the radial surfaces 18, 19 of the first and third portions 3, 5 of the outer body of the fire stop 1. The cable 20 is inserted through said gap formed between the radial surfaces 18, 19. As the blocks 2 are of a soft material, cables 20 of a range of different outer diameters may be received. The fire stop 1 is then pressed together and pushed into an opening of a wall etc., with the cable 20 in the cen- tre. The fire stop 1 is pushed into the opening with the axial open end 26 of the inner space 6 first. Said insertion is facilitated by the chamfers 13 at the axial open end 26 of the inner spaces 6. The outer diameter of the fire stop 1, when pressed together is somewhat larger than the inner diameter of the opening receiving the fire stop 1.

Thereby, the blocks 2 of intumescent material will be pressed inwards towards the cable 20 when the fire stop 1 is placed in the opening. At the same time the outer surface, in- cluding the ?ange 12 will be pressed against the inner surface of the opening. The com- pression force in enhanced by the cable and the amount of enhancement depends on the outer diameter of the cable 20. No tool is needed for the mounting of the fire stop 1, with cable 20 received, inside an opening of a wall or the like.

Claims

1 PATENTKRAV

1. Brandstopp (1) for att bilda en genomgang for en kabel, en trad eller ett ror genom en oppning i en vagg, ett tak eller ett golv, vilket brandstopp (1) innefattar en yttre kropp och ett svallande ("intumescent") material som tas emot inuti den yttre kroppen, vilket svallande material skall omge en kabel, en trad, eller ett ror placerad inuti brandstoppet (1), kannetecknad av att den yttre kroppen innefattar en forsta del (3), en andra del (4) och en tredje del (5) vilka är forbundna med varandra langs tvà viklinjer i form av gangjarnsdelar (7, 8) och att de forsta och tredje delarna (3, 5) är forbundna med den andra delen (4) vid motsatta andar hos den andra delen (4).

2. Brandstopp (1) enligt krav 1, dar brandstoppet (1) är forspand till ett Oppet lage med hjalp av gangjamsdelarna (7, 8), i vilket en spalt bildas mellan radiella ytor (18,19) hos den forsta delen (3) respektive den tredje delen (5).

3. Brandstopp (1) enligt krav 1 eller 2, dar the svallande materialet har formen av block (2) och dar det svallande materialet är tillverkat av ett material som är tillrackligt mjukt for att ge efter nar en kabel, en trad eller ett ror placeras inuti brandstoppet.

4. Brandstopp (1) enligt krav 3, dar varje block (2) av svallande material har formen av en ratvinklig parallellepiped.

5. Brandstopp (1) enligt krav 4, dar blocken (2) av svallande material tas emot i 20 inre utrymmen (6) hos brandstoppets (1) yttre kropp, anpassade till formen hos blocken (2) av svallande material och dar de inre utrymmena (6) är oppna vid en axiell ande (26) hos brandstoppet (1).

6. Brandstopp (1) enligt krav 5, dar varje del (3, 4, 5) hos den yttre kroppen har en utskjutande del (15, 16, 17) vid den axiella anden motsatt de inre utrymmenas (6) Oppna axiella ande (26), vilka utskjutande delar (15,16,17) skjuter ut radiellt mat mot mitten av brandstoppet (1) och vilka utskjutande delar kommer att sammanfalla nar brandstoppet (1) trycks samman.

7. Brandstopp (1) enligt krav 6, dar de inre utrymmena (6) bildas mellan de utskjutande delarna (15, 16, 17) och den oppna axiella anden (26) genom tva vinkelrata inre vaggar (21, 22) hos den yttre kroppens forsta del (3), en inre vagg (23) hos den yttre kroppens andra del (4) och tva vinkelrata inre vaggar (24, 25) hos den yttre kroppens tredje del (5), varvid en kant hos en inre vagg (22, 24) hos de forsta respektive tredje delarna (3, 5) sammanfaller med motsatta kanter hos den andra delens (4) inre vagg (23). 2

8. Brandstopp (1) enligt krav 6 eller 7, dar de utskjutande delama (15, 16, 17) hos den yttre kroppens forsta, andra och tredje delar (3, 4, 5) har rundade inre ytor (9, 10, 11), vilka rundade inre ytor (9, 10, 11) är riktade mot mitten av brandstoppet (1).

9. Brandstopp (1) enligt nagot av tidigare krav, dar den yttre kroppens forsta, andra och tredje delar (3, 4, 5) har flansar (12) pa en yttre yta hos varje del, vilka bildar runtomgdende flansar hos brandstoppet (1) nar brandstoppet (1) trycks samman.

10. Brandstopp (1) enligt nagot av kraven 5-8, dar den yttre kroppens forsta, andra och tredje delar (3, 4, 5) vardera har en yttre avfasning (13) vid det inre utrymmets (6) oppna axiella ande (26), vilka avfasningar (13) slutar i en yttre ringdel (14) hos varje del (3, 4, 5).

11. Anvandning av ett brandstopp (1) enligt nAgot av foregaende krav, kannetecknad av att en kabel, en tad eller ett ror airs in via en spalt langs en sida hos brandstoppet forspant till ett oppet lage, att kabeln är placerad mellan block av svallande material inuti brandstoppet, att brandstoppet trycks samman, vilket stanger spalten, och att brandstoppet fors in for hand, med kabeln, in i en Oppning hos en vagg, ett tak eller ett golv. 8 3