EP1112110A1 - Dispositif d'ouverture automatique d'un organe de securite, en response a une elevation de temperature - Google Patents
Dispositif d'ouverture automatique d'un organe de securite, en response a une elevation de temperatureInfo
- Publication number
- EP1112110A1 EP1112110A1 EP00951606A EP00951606A EP1112110A1 EP 1112110 A1 EP1112110 A1 EP 1112110A1 EP 00951606 A EP00951606 A EP 00951606A EP 00951606 A EP00951606 A EP 00951606A EP 1112110 A1 EP1112110 A1 EP 1112110A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- spacer
- stop
- temperature
- plug
- safety member
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000004044 response Effects 0.000 title claims abstract description 7
- 125000006850 spacer group Chemical group 0.000 claims abstract description 40
- 229910001285 shape-memory alloy Inorganic materials 0.000 claims abstract description 12
- 230000007704 transition Effects 0.000 claims abstract description 10
- 230000000717 retained effect Effects 0.000 claims description 5
- 238000006073 displacement reaction Methods 0.000 claims description 2
- 210000000056 organ Anatomy 0.000 claims 1
- 230000000903 blocking effect Effects 0.000 description 5
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 239000012530 fluid Substances 0.000 description 2
- 238000012800 visualization Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000003446 memory effect Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 230000031070 response to heat Effects 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 229910002058 ternary alloy Inorganic materials 0.000 description 1
- 230000002747 voluntary effect Effects 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C37/00—Control of fire-fighting equipment
- A62C37/08—Control of fire-fighting equipment comprising an outlet device containing a sensor, or itself being the sensor, i.e. self-contained sprinklers
- A62C37/10—Releasing means, e.g. electrically released
- A62C37/11—Releasing means, e.g. electrically released heat-sensitive
- A62C37/16—Releasing means, e.g. electrically released heat-sensitive with thermally-expansible links
Definitions
- the invention relates to a device for automatically opening a safety device, in response to a rise in temperature.
- This device can be used to trigger the opening of an automatic fire extinguishing nozzle, a fire door, a fire damper, a smoke vent or a radome, for example.
- an automatic triggering device In some automatic fire extinguishing systems, it is common to use as an automatic triggering device an assembly comprising an often ternary alloy fuse changing state at a well-defined temperature. It is also frequent to use an electronic device comprising an element sensitive to the rise in temperature, and to carry out an electronic treatment of it so as to control the opening of a valve, or of a lock.
- the fuse pad is not reliable.
- the alloys age over time, their melting temperature is modified and their mechanical characteristics are such that the operations can be accidental or on the contrary not take place.
- the object of the invention is to eliminate the aforementioned drawbacks, and to present all of the following qualities:
- the invention uses at least one metal part made of a shape memory alloy, used after a thermal and mechanical treatment, and in a temperature range giving it a quality known as a simple shape memory effect.
- the alloy part is produced and heat treated to memorize its initial shape. Then it is deformed to change to its temporary, or active, form. This mechanical deformation induces a movement potential, which is released when the part reaches the so-called transition temperature at which the part returns to its initial shape by plastic deformation.
- the plastic deformation and the transition temperature depend on the alloy chosen to make the part.
- the subject of the invention is a device for automatic opening of a safety member, in response to a rise in temperature, the safety member moving axially in a passage and being subjected to a permanent stress upon opening, characterized in that the safety member is held in the closed position, directly or indirectly, by means of at least one stop and a spacer made of memory alloy shape, so that when the temperature reaches the transition temperature of the shape memory alloy, the spacer returns to its initial shape and moves the stop, thus ensuring the release of the safety member.
- the spacer is a rod of rectangular section, twisted to change to its active form, the displacement of the stop being made by rotation;
- the spacer is arranged between the safety member and the stop;
- the safety member is retained indirectly by the stop constituted by a washer, by means of balls cooperating with an annular groove of the safety member.
- FIG. la is a schematic view in partial axial section of a first embodiment of the invention in an application to an automatic opening valve
- FIG. 1b is a partial top view of the valve of FIG. la
- FIG. 2 is a schematic view in axial partial section of the first embodiment of the invention applied to a lock with automatic opening;
- FIG. 3a is a schematic view in axial partial section of a second embodiment of the invention in an application to a plug with automatic opening;
- FIG. 3b is a top view of FIG. 3a
- - Figure 4 is a schematic view in partial axial section of a third embodiment of the invention in an application to a plug with automatic opening held in the closed position by balls;
- FIG. 5 is a schematic view in partial axial section of a fourth embodiment of the invention applied to the automatic opening of a ball valve.
- a valve with automatic opening in response to a rise in temperature is arranged at the end of a pipe, not shown, situated under the valve 4, in the axis of the passage 7 closed by the plug 8.
- the seal between the plug 8 and the passage 7 is ensured by O-rings 6.
- the body of the valve 4 is provided cylindrical, for example, with a lateral opening 9 for the escape of the incoming pressurized fluid. by the pipe not shown and the passage 7.
- the body of the valve 4 is closed by a cap 1 screwed for example, and having a central opening 10, rectangular for example, whose major axis is perpendicular to the plane of Figure 1 a .
- This central opening 10 is provided to allow a stop 2 of corresponding shape to pass.
- the stop 2 is placed under the cap 1 with its major axis in the plane of Figure 1.
- a spacer 3 in shape memory alloy.
- the spacer is preferably in the form of a rod of square or rectangular section, the cross section of which is calculated to present the compressive strength necessary to maintain the plug 8 in the passage 7.
- the section of the spacer 3 is 8x4mm.
- the initial shape of the spacer 3 is straight.
- the spacer 3 is twisted a quarter turn to change to its active form.
- the spacer is then put in place and secured on the one hand to the plug 8, on the other hand to the stop 2 which is in the position shown in Figures la and lb.
- the cap 1 is then immobilized and preferably sealed to avoid any disturbance.
- the plug 8 is advantageously locked in rotation relative to the body of the valve 4 by a lug 5, or by the shape, square or hexagonal for example, of its upper part.
- the spacer When the temperature rises and reaches the transition temperature of the shape memory alloy constituting the spacer 3, the spacer returns to its initial rectilinear shape. As the plug 8 is blocked in rotation, it is the stop 2 which performs a rotation of a quarter turn. It is then in front of the central opening 10 and it stops playing
- the lock body 4 carries a cap 1 provided with a central opening 10.
- the stop 2 is integral with the spacer 3 made of shape memory alloy.
- a bolt 11 projecting from the lock body 4 is urged upwards by springs 12.
- the spacer 3, of initial rectilinear shape is twisted by a quarter turn in its active form.
- the spacer returns to its initial shape, causing the rotation of the stop 2 which passes through the central opening 10 under the action of the springs 12, the bolt 11 s 'then erasing in the lock body 4 and releasing, for example, a fire door.
- the spacer 3 works in compression to block the movement of the bolt.
- the spacers 3 work in traction to block the movement of the plug 8 (or the bolt 1 1).
- the valve body 4 has a plug 8 intended to be released to ensure the opening of the valve.
- At least one spacer 3 is fixed at its lower end to the valve body 4, possibly by a fixing piece 13. At its upper end, it is fixed to a stopper 14 for retaining the plug 8.
- the spacer 3, straight in its initial shape is twisted by a quarter turn in its active shape, so that the retaining stop 14 is arranged radially relative to the valve body 4 and ensures the blocking of the plug 8 in traction.
- the spacer 3 returns to its initial shape.
- the retaining stop 14 is then disposed tangentially to the valve body 4 and the plug 8 is released, ensuring the opening of the valve.
- the plug is not held directly by the spacer 3 which has practically no effort to undergo permanently in the longitudinal direction.
- the valve body 4 has a central passage for a plug 8 comprising an annular groove 15 capable of receiving blocking balls 16. These balls 16 are held in the groove 15 by a washer 17 urged upwards by springs 18. The washer 17 is held in the blocking position of the balls by spacers 3 fixed to the cap 1 which is screwed onto the valve body 4.
- the spacers 3 are not fixed to the washer 17. They only hold it by support. In their initial form, the spacers are twisted or arched. In their active form, they are rectilinear. When the transition temperature is reached, the spacers return to their original shape, which is longitudinally shorter than their active shape. They then allow the uplift of the washer 17 under the action of the springs 18, which allows the withdrawal of the balls 16 and the release of the plug 8. In this embodiment, the central opening 10 of the cap 1 is sufficient to allow drop the plug 8.
- a pipe 20 is controlled by a ball valve 21, the rotation of which is controlled by a square 22.
- the spacer 3 is twisted and fixed on the one hand to the square 22 for controlling the bushel 21, on the other hand to a body 23 fixed relative to the valve.
- the spacer returns to its initial position and it rotates the plug 21 by a quarter turn, thus opening the valve.
- the device is used to block the movement of a plug blocking the passage of a product. fire extinguisher for example, or the bolt of a lock.
- This blocking is ensured, directly or indirectly, by a spacer made of shape memory alloy. The return of the spacer to its initial shape results in the release of the plug or the bolt.
- the choice of the single-acting mode of action for the spacer ensures a single irreversible operation, and prohibits reuse, which ensures the visualization of the operation.
Landscapes
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Temperature-Responsive Valves (AREA)
- Safety Valves (AREA)
- Control Of Combustion (AREA)
- Buildings Adapted To Withstand Abnormal External Influences (AREA)
Description
Claims
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9907679 | 1999-06-17 | ||
| FR9907679A FR2794984B1 (fr) | 1999-06-17 | 1999-06-17 | Dispositif d'ouverture automatique d'un organe de securite, en reponse a une elevation de temperature |
| PCT/FR2000/001684 WO2000078401A1 (fr) | 1999-06-17 | 2000-06-19 | Dispositif d'ouverture automatique d'un organe de securite, en response a une elevation de temperature |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1112110A1 true EP1112110A1 (fr) | 2001-07-04 |
| EP1112110B1 EP1112110B1 (fr) | 2005-08-31 |
Family
ID=9546922
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP00951606A Expired - Lifetime EP1112110B1 (fr) | 1999-06-17 | 2000-06-19 | Dispositif d'ouverture automatique d'un organe de securite, en response a une elevation de temperature |
Country Status (7)
| Country | Link |
|---|---|
| EP (1) | EP1112110B1 (fr) |
| AT (1) | ATE303182T1 (fr) |
| DE (1) | DE60022301T2 (fr) |
| DK (1) | DK1112110T3 (fr) |
| ES (1) | ES2245943T3 (fr) |
| FR (1) | FR2794984B1 (fr) |
| WO (1) | WO2000078401A1 (fr) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2000718A1 (fr) * | 2007-06-04 | 2008-12-10 | Luxembourg Patent Company S.A. | Dispositif de décharge de pression à activation thermique doté d'un matériau à effet à mémoire de forme |
| RU2420337C1 (ru) * | 2010-03-09 | 2011-06-10 | Государственное образовательное учреждение высшего профессионального образования Московский авиационный институт (государственный технический университет), (МАИ) | Спринклер |
| US9381389B2 (en) | 2014-04-24 | 2016-07-05 | Kidde Technologies, Inc. | Fire suppression system actuation apparatus and system |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2250435A (en) * | 1990-12-07 | 1992-06-10 | Graviner Ltd Kidde | Nozzle for discharging liquid fire extinguishant |
| JPH08173570A (ja) * | 1994-12-21 | 1996-07-09 | Senju Sprinkler Kk | スプリンクラーヘッド |
| JPH08289940A (ja) * | 1995-04-24 | 1996-11-05 | Senju Sprinkler Kk | スプリンクラーヘッド |
-
1999
- 1999-06-17 FR FR9907679A patent/FR2794984B1/fr not_active Expired - Fee Related
-
2000
- 2000-06-19 EP EP00951606A patent/EP1112110B1/fr not_active Expired - Lifetime
- 2000-06-19 DK DK00951606T patent/DK1112110T3/da active
- 2000-06-19 DE DE60022301T patent/DE60022301T2/de not_active Expired - Fee Related
- 2000-06-19 AT AT00951606T patent/ATE303182T1/de not_active IP Right Cessation
- 2000-06-19 WO PCT/FR2000/001684 patent/WO2000078401A1/fr not_active Ceased
- 2000-06-19 ES ES00951606T patent/ES2245943T3/es not_active Expired - Lifetime
Non-Patent Citations (1)
| Title |
|---|
| See references of WO0078401A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| ES2245943T3 (es) | 2006-02-01 |
| DE60022301D1 (de) | 2005-10-06 |
| ATE303182T1 (de) | 2005-09-15 |
| DE60022301T2 (de) | 2006-06-08 |
| FR2794984B1 (fr) | 2001-12-07 |
| DK1112110T3 (da) | 2006-01-09 |
| WO2000078401A1 (fr) | 2000-12-28 |
| EP1112110B1 (fr) | 2005-08-31 |
| FR2794984A1 (fr) | 2000-12-22 |
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