CA2133068C - Spray head provided with a pressure sensitive valve - Google Patents
Spray head provided with a pressure sensitive valve Download PDFInfo
- Publication number
- CA2133068C CA2133068C CA002133068A CA2133068A CA2133068C CA 2133068 C CA2133068 C CA 2133068C CA 002133068 A CA002133068 A CA 002133068A CA 2133068 A CA2133068 A CA 2133068A CA 2133068 C CA2133068 C CA 2133068C
- Authority
- CA
- Canada
- Prior art keywords
- housing
- spindle element
- spring
- spindle
- inlet
- 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.)
- Expired - Fee Related
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Classifications
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C31/00—Delivery of fire-extinguishing material
- A62C31/02—Nozzles specially adapted for fire-extinguishing
Landscapes
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
Abstract
The object of the invention is to provide a new spray head for group release in a fire fighting installation with a high operating pressure. The spray head comprises a spindle element pressed into the inlet of the spray head with such a spring force that the spindle element keeps the inlet closed against the rest pressure of the installation but yields to the operating pressure of the installation.
Description
SPRAY HEAD PROVIDED WITH A PRESURE SENSITIVE VALVE
The present invention relates to a spray head for a fire fighting installation, in particular for such a fire fighting installation that is capable of operating with a high drive pressure for the extinguishing liquid. By a high pressure is in this context meant a pressure within the range about 30 bar to about 300 bar, while conventional low pressure installations have an operating pressure of about 5-10 bar. As source for the extinguishing liquid can preferably be utilized at least one hydraulic accumulator to the out-going line of which a number of automatically releasable spray heads are connected.
It is in many cases desirable to, starting from one spray head released directly by a fire broken out, release a whole group of usually nearby spray heads.
The invention relates to a spray head for this purpose. In one embodiment there is provided a spray head comprising a housing, an inlet in the housing, nozzles on the housing, a release ampoule in the housing, a spring in the housing, and a spindle element pressed against the inlet of the housing by the spring; the spring having such a spring force that the spindle element keeps the inlet closed against a stand-by pressure but yields to high pressure extinguishing liquid for delivering the liquid to the nozzles of the housing while the release ampoule remains intact even when the force of the spring acts on the release ampoule.
The present invention relates to a spray head for a fire fighting installation, in particular for such a fire fighting installation that is capable of operating with a high drive pressure for the extinguishing liquid. By a high pressure is in this context meant a pressure within the range about 30 bar to about 300 bar, while conventional low pressure installations have an operating pressure of about 5-10 bar. As source for the extinguishing liquid can preferably be utilized at least one hydraulic accumulator to the out-going line of which a number of automatically releasable spray heads are connected.
It is in many cases desirable to, starting from one spray head released directly by a fire broken out, release a whole group of usually nearby spray heads.
The invention relates to a spray head for this purpose. In one embodiment there is provided a spray head comprising a housing, an inlet in the housing, nozzles on the housing, a release ampoule in the housing, a spring in the housing, and a spindle element pressed against the inlet of the housing by the spring; the spring having such a spring force that the spindle element keeps the inlet closed against a stand-by pressure but yields to high pressure extinguishing liquid for delivering the liquid to the nozzles of the housing while the release ampoule remains intact even when the force of the spring acts on the release ampoule.
The invention shall in the following be described with reference to exemplifying preferred embodiments shown in the attached drawings.
Figure 1 shows a valve in a stand-by state.
Figure 2 shows the valve in activated state.
Figure 3 shows a coupling diagram of a fire fighting installation in stand-by state.
Figures 4-6 show a first preferred embodiment of spray heads included in the installation, in stand-by state, in individually released state and in group released state, respectively.
Figures 7-9 show a second preferred embodiment of spray heads, in the same way as Figures 4-6.
A hydraulic accumulator with a high charge pressure (e. g., 200 bar) is indicated by the reference numeral 1. The accumulator 1, which in the following also is called primary accumulator, comprises an outlet tube 2, which preferably is provided with a number of apertures in its wall in order to, according to what is described in Canadian patent application 2,123,706, deliver liquid and a mixture of the liquid and the drive gas-of the accumulator, respectively. An outlet valve connected to the tube 2 is generally indicated by 3, the inlet of the valve by 4 and its outlet by 5. The outlet 5 is via an out-going line 25 in connection with a number of automatically releasable spray heads 26-29 as shown in Figure 3.
In the stand-by position of the valve 3, according to Figure l, the connection between the inlet 4 of the valve and the outlet 5 closed by a valve spindle 6.
Figure 1 shows a valve in a stand-by state.
Figure 2 shows the valve in activated state.
Figure 3 shows a coupling diagram of a fire fighting installation in stand-by state.
Figures 4-6 show a first preferred embodiment of spray heads included in the installation, in stand-by state, in individually released state and in group released state, respectively.
Figures 7-9 show a second preferred embodiment of spray heads, in the same way as Figures 4-6.
A hydraulic accumulator with a high charge pressure (e. g., 200 bar) is indicated by the reference numeral 1. The accumulator 1, which in the following also is called primary accumulator, comprises an outlet tube 2, which preferably is provided with a number of apertures in its wall in order to, according to what is described in Canadian patent application 2,123,706, deliver liquid and a mixture of the liquid and the drive gas-of the accumulator, respectively. An outlet valve connected to the tube 2 is generally indicated by 3, the inlet of the valve by 4 and its outlet by 5. The outlet 5 is via an out-going line 25 in connection with a number of automatically releasable spray heads 26-29 as shown in Figure 3.
In the stand-by position of the valve 3, according to Figure l, the connection between the inlet 4 of the valve and the outlet 5 closed by a valve spindle 6.
The valve spindle 6 has an axial through channel 7 which connects the outlet 5 to a liquid space 8 which, in turn, is in connection to a small (e. g., about 0.3 liter) hydraulic accumulator 9 with a low charge pressure (e. g., 6-10 bar), in the following also called -secondary accumulator.
The valve spindle 6 has a head 10 which like a piston is movable in the liquid space 8 between the position of Figure 1, in which the head 10 presses against the valve housing surrounding the spindle 6 and the connection from the inlet 4 to the outlet 5 is closed, and the position of Figure 2, in which the head 10 presses against shoulder 11 and the connection from the inlet 4 to the outlet 5 is open.
In Figure l, the spindle 6 is kept in place by the liquid space 8 pressure, which acts on the spindle head 10, and by a spring 12 pressing on the spindle head 10. The pressure in the inlet 5 on the spindle end therein and the pressure of the primary accumulator on a ring shoulder 13 formed in the spindle 6 act in the opposite direction.
When a spray head being in connection to the outlet 5 is released, the secondary accumulator 9 starts delivering liquid to the spray head in question.
Hereby the pressure in the liquid space 8 falls quickly whereat the pressure action of the primary accumulator 1 on the shoulder 13 wins and the spindle starts moving to the right in Figure 1 and as that end of the spindle 6 which is towards the outlet 5 reaches the inlet 4 the end comes under the influence of the pressure of the primary accumulator and the spindle is driven to the end position of Figure 2, against the stop 11. The force of the spring 12 is preferably adapted in such a way that it after the primary accumulator having been discharged is capable of driving the spindle 6 back from the position of Figure 2 to the position of Figure 1.
A nonreturn valve 14 positioned in the channel 7 of the valve spindle 6 prevents the pressure of the primary accumulator in the position of Figure 2 from entering the liquid space 8. A manometer is indicated by 15 and a manually operable reserve release means, which in Figures 1 and 2 is turned out and does not effect the function, is indicated by 16.
It is often of advantage to, when a fire has broken out, activate a group of such spray heads too which still have their release ampoules intact. The spray heads 26-29 in Figure 3 can be supposed to be such a group, and one preferable embodiment of spray heads for this purpose is shown in Figures 4-6.
The spray head has a conventional release ampoule 30 engaged by a first spindle element 31, pressed upon by a spring 32 which by its other end presses a second spindle element 33 against the inlet opening of the spray head. The force of the spring 32 is adapted in such a way that it without crushing the ampoule 30 is capable of keeping the second spindle element 33 in the inlet of the spray head, according to Figure 4, against the full pressure of the secondary accumulator 9, i.e. when the valve 3 mounted on the primary accumulator 1 is in the state according to Figure 1. Hereby the spindle element 33 keeps the connection to the nozzles 34 of the spray head closed.
In Figure 5, the ampoule 30 of the spray head 26 5 has been crushed or is molten under the influence of a fire broken out nearby. The spring 32 has hit down the spindle element 31 and the spindle element 33 has, under the influence of the pressure of the secondary accumulator 9, been able to follow to hit a stop 35 fixed to the housing of the spray head. The connection from the inlet of the spray head 26 to its nozzles 34 is open.
By this, as earlier has been described, the valve 3 on the primary hydraulic accumulator 1 will take the state according to Figure 2, and the pressure of the primary accumulator will act in the inlets to the spray heads 27, 28, and 29 as well. As is seen in Figure 6, e.g. the spindle element 33 of the spray head 29 will be hit into abutment against the stop 35 and the connection from the inlet of the spray head to the nozzles 34 is open. The force of the spring 32 is preferably adapted in such a way that it neither in fully compressed state, according to Figure 6, crushes the release ampoule 30; the pressure for opening can be set to e.g. 15 bar in the line 35.
Figures 7-9 show an alternative embodiment which can be mounted on a wall and which works according to the same principle as in the foregoing has been described with reference to Figures 4-6. The spray heads according to Figures 4-9 can of course be used independently of valves according to Figures 1 and 2, which valves on their part do not presuppose spray heads according to Figures 4-9.
For larger installations the invention can of course be applied on an arbitrary number of hydraulic accumulators and/or high pressure pumps. With respect to spray heads, nozzles, group release and other arrangements, in each case can at will be applied what has been described in Canadian Patent Nos. 2,104,302;
2,103,069; 2,103,070; 2,111,232; 2,111,233; 2,123,707;
2,123,706; and 2,123,705.
The valve spindle 6 has a head 10 which like a piston is movable in the liquid space 8 between the position of Figure 1, in which the head 10 presses against the valve housing surrounding the spindle 6 and the connection from the inlet 4 to the outlet 5 is closed, and the position of Figure 2, in which the head 10 presses against shoulder 11 and the connection from the inlet 4 to the outlet 5 is open.
In Figure l, the spindle 6 is kept in place by the liquid space 8 pressure, which acts on the spindle head 10, and by a spring 12 pressing on the spindle head 10. The pressure in the inlet 5 on the spindle end therein and the pressure of the primary accumulator on a ring shoulder 13 formed in the spindle 6 act in the opposite direction.
When a spray head being in connection to the outlet 5 is released, the secondary accumulator 9 starts delivering liquid to the spray head in question.
Hereby the pressure in the liquid space 8 falls quickly whereat the pressure action of the primary accumulator 1 on the shoulder 13 wins and the spindle starts moving to the right in Figure 1 and as that end of the spindle 6 which is towards the outlet 5 reaches the inlet 4 the end comes under the influence of the pressure of the primary accumulator and the spindle is driven to the end position of Figure 2, against the stop 11. The force of the spring 12 is preferably adapted in such a way that it after the primary accumulator having been discharged is capable of driving the spindle 6 back from the position of Figure 2 to the position of Figure 1.
A nonreturn valve 14 positioned in the channel 7 of the valve spindle 6 prevents the pressure of the primary accumulator in the position of Figure 2 from entering the liquid space 8. A manometer is indicated by 15 and a manually operable reserve release means, which in Figures 1 and 2 is turned out and does not effect the function, is indicated by 16.
It is often of advantage to, when a fire has broken out, activate a group of such spray heads too which still have their release ampoules intact. The spray heads 26-29 in Figure 3 can be supposed to be such a group, and one preferable embodiment of spray heads for this purpose is shown in Figures 4-6.
The spray head has a conventional release ampoule 30 engaged by a first spindle element 31, pressed upon by a spring 32 which by its other end presses a second spindle element 33 against the inlet opening of the spray head. The force of the spring 32 is adapted in such a way that it without crushing the ampoule 30 is capable of keeping the second spindle element 33 in the inlet of the spray head, according to Figure 4, against the full pressure of the secondary accumulator 9, i.e. when the valve 3 mounted on the primary accumulator 1 is in the state according to Figure 1. Hereby the spindle element 33 keeps the connection to the nozzles 34 of the spray head closed.
In Figure 5, the ampoule 30 of the spray head 26 5 has been crushed or is molten under the influence of a fire broken out nearby. The spring 32 has hit down the spindle element 31 and the spindle element 33 has, under the influence of the pressure of the secondary accumulator 9, been able to follow to hit a stop 35 fixed to the housing of the spray head. The connection from the inlet of the spray head 26 to its nozzles 34 is open.
By this, as earlier has been described, the valve 3 on the primary hydraulic accumulator 1 will take the state according to Figure 2, and the pressure of the primary accumulator will act in the inlets to the spray heads 27, 28, and 29 as well. As is seen in Figure 6, e.g. the spindle element 33 of the spray head 29 will be hit into abutment against the stop 35 and the connection from the inlet of the spray head to the nozzles 34 is open. The force of the spring 32 is preferably adapted in such a way that it neither in fully compressed state, according to Figure 6, crushes the release ampoule 30; the pressure for opening can be set to e.g. 15 bar in the line 35.
Figures 7-9 show an alternative embodiment which can be mounted on a wall and which works according to the same principle as in the foregoing has been described with reference to Figures 4-6. The spray heads according to Figures 4-9 can of course be used independently of valves according to Figures 1 and 2, which valves on their part do not presuppose spray heads according to Figures 4-9.
For larger installations the invention can of course be applied on an arbitrary number of hydraulic accumulators and/or high pressure pumps. With respect to spray heads, nozzles, group release and other arrangements, in each case can at will be applied what has been described in Canadian Patent Nos. 2,104,302;
2,103,069; 2,103,070; 2,111,232; 2,111,233; 2,123,707;
2,123,706; and 2,123,705.
Claims (5)
1. A spray head comprising a housing, an inlet in the housing, nozzles on the housing, a release ampoule in the housing, a spring in the housing, and a spindle element pressed against the inlet of the housing by the spring; the spring having such a spring force that the spindle element keeps the inlet closed against a stand-by pressure but yields to high pressure extinguishing liquid for delivering the liquid to the nozzles of the housing while the release ampoule remains intact even when the force of the spring acts on the release ampoule.
2. A spray head comprising a housing, an inlet in the housing, nozzles on the housing, a release ampoule in the housing, a spring in the housing, and a spindle structure pressed against the inlet of the housing by the spring; the spring having such a force that the spindle structure keeps the inlet closed against a stand-by pressure but yields to high pressure extinguishing liquid of a high pressure source for delivering the liquid to the nozzles of the housing while the release ampoule remains intact even when the force of the spring acts on the release ampoule, the spindle structure comprising a first spindle element and a second spindle element, the release ampoule being engaged by the first spindle element which is pressed upon by a first end of the spring, a second end of the spring pressing the second spindle element against the inlet of the housing, the second spindle element being movable inwardly by a pressure larger than the stand-by pressure, inward movement of the second spindle element being limited by hitting a fixed stop in the housing.
3. The spray head according to claim 2, wherein the force of the spring is such that the release ampoule is not crushed when the second spindle element hits the stop.
4. A spray head comprising:
a housing;
an inlet opening into the housing for receiving first and second liquids at least one nozzle connected to the inlet opening for spraying the liquids from the housing when the inlet opening is open;
one spindle element in the housing having one end in the inlet opening for being acted on by first and second pressures of the first and second liquids received therein and being movable in the housing from a first position in which the one end of the one spindle element closes the inlet opening to a second position in which the one end of the one spindle element opens the inlet opening, the pressures acting on the one end of the one spindle element to urge the one spindle element toward the second position;
a spring in the housing and having one end acting on the one spindle element and urging the one spindle element into the first position for keeping the inlet opening closed under the second pressure but open under the first pressure;
release means in the housing for responding to a fire with movement of the one spindle element from the first position to the second position;
an ampoule in the release means for being crushed or melted by the fire; and another spindle element movably mounted in the housing and having one end engaging the ampoule and an opposite end engaging an opposite end of the spring.
a housing;
an inlet opening into the housing for receiving first and second liquids at least one nozzle connected to the inlet opening for spraying the liquids from the housing when the inlet opening is open;
one spindle element in the housing having one end in the inlet opening for being acted on by first and second pressures of the first and second liquids received therein and being movable in the housing from a first position in which the one end of the one spindle element closes the inlet opening to a second position in which the one end of the one spindle element opens the inlet opening, the pressures acting on the one end of the one spindle element to urge the one spindle element toward the second position;
a spring in the housing and having one end acting on the one spindle element and urging the one spindle element into the first position for keeping the inlet opening closed under the second pressure but open under the first pressure;
release means in the housing for responding to a fire with movement of the one spindle element from the first position to the second position;
an ampoule in the release means for being crushed or melted by the fire; and another spindle element movably mounted in the housing and having one end engaging the ampoule and an opposite end engaging an opposite end of the spring.
5. The spray head according to claim 4, and further comprising a stop for limiting the second position of the one spindle element, and wherein the ampoule has a strength such that it is not crushed by the spring and the other spindle element when the one spindle element is in the second position.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FI930417A FI91038C (en) | 1993-01-29 | 1993-01-29 | The nozzle head |
| FI930417 | 1993-01-29 | ||
| PCT/FI1994/000046 WO1994016771A1 (en) | 1993-01-29 | 1994-01-31 | Spray head provided with a pressure sensitive valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2133068A1 CA2133068A1 (en) | 1994-08-04 |
| CA2133068C true CA2133068C (en) | 2007-01-23 |
Family
ID=37684121
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002133068A Expired - Fee Related CA2133068C (en) | 1993-01-29 | 1994-01-31 | Spray head provided with a pressure sensitive valve |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2133068C (en) |
-
1994
- 1994-01-31 CA CA002133068A patent/CA2133068C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CA2133068A1 (en) | 1994-08-04 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |