WO2019008416A1

WO2019008416A1 - Device for propelling a material charge using a gas-phase medium under pressure

Info

Publication number: WO2019008416A1
Application number: PCT/IB2017/054063
Authority: WO
Inventors: Istvan Szocs
Original assignee: Swiss Fire Protection Research & Development Ag
Priority date: 2017-07-06
Filing date: 2017-07-06
Publication date: 2019-01-10

Abstract

The invention relates to a device for propelling a material charge using a gas-phase medium under pressure, which comprises a charge chamber (11) for accommodating the material charge (2), an acceleration housing (10) containing an acceleration medium chamber (12) serving for the temporary storage of the acceleration medium (3) suitable for propelling the material charge (2), and a separation part-unit (20) inserted between the charge chamber (11) and the acceleration medium chamber (12). The separation part unit (20) comprises a slidable valve (30) with means for allowing acceleration medium to pass from a recharging passage (25) into the acceleration medium chamber (12), the means effectively functioning as a non-return valve.

Description

Device for propelling a material charge using a gas-phase medium under pressure

The subject of the invention relates to a device for propelling a material charge -using a gas- phase medium under pressure- which comprises a charge chamber for accommodating the material charge, an acceleration housing including an acceleration medium chamber serving for the temporary storage of the acceleration medium suitable for propelling the material charge, and a separation part-unit inserted between the charge chamber and the acceleration medium chamber, where the separation part-unit has a valve housing delimiting the interior space of the separation part-unit and a valve seat cooperating with it, as well as a sealing body positioned in the valve housing in a way so that it may slide, furthermore, at least one of the valve housing and the valve seat is securely fixed to the acceleration housing, the separation part-unit has a charging passage established on the valve housing and connecting the interior space of the separation part-unit with the acceleration medium chamber, while the valve seat of the separation part-unit has a mouth surrounded by a- sealing face, and the interior space of the separation part-unit is connected to the charge chamber via the mouth, with the device in its basic state an equalizer chamber isolated from both the charge chamber and the acceleration medium chamber by the sealing body of the separation part-unit, and the equalizer chamber is connected to an operation unit via a channel serving for taking the acceleration medium to the equalizer chamber.

More specifically, the invention relates to the constructions of the novel separation part-unit and of the operation unit located and built in the unit even independently.

Numerous solutions are known of for propelling materials in various phases into a given space with fine distribution. These include the solution presented in patent specification registration number HU 203.995, the essence of which is that the liquid or powder to be propelled into the environment is discharged and distributed in the environment at a great speed from a device with the assistance of a gaseous medium under high pressure.

For this the liquid or powder to be distributed is placed in a tube which is connected to a valve structure, and the tube containing the propellant medium is connected to this same valve structure, in this way the housing containing the valve structure separates the two tubes from each other. From the point of view of operation, the part of the two tubes before the valve structure, the propellant medium tank, may be filled with propellant .medium with the help of suitable auxiliary valves, while the part of the tube after the valve structure, the outlet tube serves for accommodating the charge, The valve structure has a mouth that is only open for a very short period of time during the operation of the device, and the propellant medium rushes from the propellant medium tank through this mouth, under great pressure and at a high speed into the outlet tube, accelerating and propelling the charge into the environment in such a way that when it comes into contact with and impact the components of the environment it. is finely distributed, vaporised and exerts the desired effect essentially in the form of a homogenous mist.

The given device may be used effectively in numerous areas, including when extinguishing fires, for propelling the extinguishing medium into the endangered space.

However, the disadvantage of the presented device is that the valve structure is complex, contains numerous moving parts that are susceptible to faults, and in this way the operation of the device is unreliable, which is unacceptable, especially in the case of use for extinguishing fires.

A further disadvantage of the blown structure is that its assembly is complicated, and the positioning and adjustment of the individual components in the appropriate position requires suitable specialist knowledge.

Our aim with the arrangement according to the invention was to overcome the deficiencies of the known versions and to create a device that can assembled simply from fewer components, and, due to the small number of moving parts, its operation is simpler and so its operational reliability and lifetime both increase,

The recognition that led to the structure according to this invention was that if the interior space of the housing of the valve located in the tube of the device is set up in a way different to that known of, and a unique sealing body with a novel construction essentially forming a single structural unit is positioned in it, which sealing body is capable of performing several tasks due to its special structure, and if the movement of the sealing body is not determined by an active component but by the pressure on given parts of the valve housing, then it is possible to regulate the filling of the acceleration medium performing the propulsion, e.g. discharge, of the material charge, the closing of the mouth and its opening at a given time with the given sealing body, and in this way the quick and reliable propulsion, discharge of the material charge can be performed in a simpler way with less probability of malfunction, and so the task may be solved.

The idea behind the invention also involves the recognition that if the internal valve located in the tube of the device is connected in an unusual way to an operating valve located outside of the tube in which valve the introduction of the acceleration medium serving for ejecting the material charge, the charging of the acceleration medium chamber and the short-term "release" of the unique sealing body of the internal valve are performed with an appropriately designed, unique valve body with a short operation path, which may he moved simply with manual force and which is located in a novel housing, then with a small, movement, by operating a single structural element the device may be charged and discharged simply, quickly and reliably in a regulated way, and so the task can be solved in an even more preferable way, in accordance with the set aim the device according to the invention for propelling a material charge using a gas-phase medium under pressure, - which comprises a charge chamber for accommodating the material charge, an acceleration housing containing an acceleration medium chamber serving for the temporary storage of the acceleration medium suitable for propelling the material charge, and a separation part-unit inserted between the charge chamber and the acceleration medium chamber, where the separation part-unit has a valve housing delimiting the interior space of the separation part-unit and a valve seat cooperating with it, as well as a sealing body positioned in the valve housing in a way so that it may slide, furthermore, at least one of the valve housing and the valve seat is securely fixed to the acceleration housing, the separation part- unit has a charging passage established in the valve housing and connecting the interior space of the separation part-unit with the acceleration medium chamber, while the valve seat of the separation part-unit has a mouth surrounded by a sealing face, and the interior space of the separation part-unit is connected to the charge chamber via the mouth, with the device in its basic state an equalizer chamber isolated from both the charge chamber and the acceleration medium chamber by the sealing body of the separation part-unit, and the equalizer chamber is connected to an operation unit via a channel serving for taking the acceleration medium to the equalizer chamber, ~ established in such a way that the sealing body has a rigid carrying part and a backflow preventive unit coupled to it, and, on the one part, the equalizer chamber of the valve housing is separated from the interior space by the backflow preventive unit, and, on the other part, the intermediate space part between the equalizer chamber and the charging passage is isolated from the interior space of the separation part-unit by the backflow preventive unit, where the charging passage is in a connection with the intermediate space part that permits the direct flow of medium, and the backflow preventive unit of the sealing body is attached to the carrying member of the sealing body so as to allow unidirectional release of the acceleration medium from the equalizer chamber into die intermediate space part but to prevent backflow of the acceleration medium into the intermediate space part of the equalizer chamber,

A further feature of the device according to the invention may be that the side surface of the carrying part of the sealing body facing the internal wall of the valve housing and the internal wall of the val ve housing delimits the equalizer chamber, which is separated from the intermediate space part by a passage linking them to each other in the materia! of the carrying part of the sealing body.

In the case of a possible embodiment of the device, the backilow preventive unit of the sealing body is formed by a lip seal with an external surface in the shape of a conical boundary, coaxial with the main axis of the sealing body, an internal surface in the shape of a concave conical boundary and a sealing surface, where the conical shaped external surface of the backflow preventive unit delimits the equalizer chamber of the valve housing, while the concave conical shaped internal surface of the backflow preventive unit delimits the intermediate space part of the internal space delimited by the valve housing of the separation part-unit connected to the charging passage, furthermore with the sealing body in its basic state the conical shaped external surface of the backflow preventi ve unit is in contact with the internal wall of the valve housing delimiting the equalizer chamber, and the sealing surface of the backflow preventive unit enclosed by the concave conical shaped internal surface in contact with the sealing face of the valve seat of the separation part-unit surrounding the mouth. The backflow preventive unit is preferably made from a flexible material.

In the case of another different embodiment of the invention the conical shaped external surface of the backflow preventive unit at an acute angle to the main axis of the sealing body and the internal wall of the valve housing also delimiting the equalizer chamber where a free gap formed of decreasing size from the direction of the equalizer chamber towards the direction of the non- constrained end of the backflow preventive unit.

In the case of yet another different embodiment of the device the side surface of the carrying part of the sealing body facing the internal wall of the valve housing that also delimits the equalizer chamber is supplied with a sealing element belonging to the backflow preventive unit, and the equalizer chamber of the internal space of the separation part and the intermediate space part are isolated from each other, furthermore, the carrying part of the sealing body has a transfer passage, in addition to the sealing element the backflow preventive unit is formed by a sealing body, oneway sealing the passage of the carrying part of the sealing body, and an energy storage member working with the sealing body, where the energy storage member is, on the one part, connected to the sealing body, and, on the other part, the sealing body is forced into the passage by pressure in the direction of the equalizer chamber by the energy storage member. in the case of a further embodiment of the invention, the acceleration housing is made from a single piece. Also, optionally, the acceleration housing has a tubular shape supplied with an end plate providing a gas-tight seal for the external end of the acceleration medium chamber. From the point of view of the device it may be preferable if the valve housing of the separation part-unit and the valve seat are fixed together so that they are immobile with respect to each other, and the separation part-unit assembled in this way is fixed to the acceleration housing with a gas- tight seal

In accordance with the set aim the further device according to the invention for propelling a material charge using a gas-phase medium under pressure, - which comprises a charge chamber for accommodating the material charge, an acceleration housing containing an acceleration medium chamber serving for the temporary storage of the acceleration medium suitable for propelling the material charge, and a separation part-unit inserted between the charge chamber and the acceleration medium chamber, where the separation part-unit has a mouth linking the acceleration medium chamber and the charge chamber to each other and which can be sealed by the sealing body, an equalizer chamber and a channel serving for guiding the acceleration medium into the equalizer chamber, and the channel is connected to an operation unit containing a valve housing and a valve body cooperating with it, - established in such a way that the valve housing of the operation unit has a transfer passage that may be linked with a gas-tight seal to the channel of the separation part-unit located in the acceleration housing, and a valve body-accommodation hollow with an axis intersecting the longitudinal axis of the transfer passage, which opens on the external side of the valve housing, the valve body is established as an elongated shaped slider that fits into the valve body-accommodation hollow that may be slid in the direction of the axis of the valve body- accommodation hollow, where the slider has a sliding surface, a push face closing the sliding surface at one end and a rear surface closing the other end of the outer surface, furthermore, at least one medium introduction passage and at least one blow-off passage are formed in the material of the slider and/or in the material of the valve housing, where at least one sealing member is inserted between the medium introduction passage and the blow-off passage separating the medium introduction passage and the blow-off passage from each other with a gas-tight seal and a feed channel suitable for guiding the acceleration medium to the medium introduction passage and, optionally, a discharge channel that may be linked to the blow-off passage are established in the valve housing of the operation unit and/or in the slider,

A further feature of the device according to the invention may be that the distance between the first edge point of the first outlet opening of the medium introduction passage closest to the blow- off passage and the second edge point of the blow-off passage closest to the medium introduction passage is greater than the size of the opening of the transfer passage in the direction of the movement of the slider. in the case of another embodiment of the invention may he that a feed channel suitable for guiding the acceleration medium -which feed channel is arranged in the valve housing opening- out to the body-accommodation hollow of the valve housing, and the inlet main axis of the feed channel and the axis of the valve body-accommodation hollow are at an angle to each other, furthermore the longitudinal axis of the transfer passage and the axis of the valve body-accommodation hollow are also at an angle to each other, the inlet opening of the medium introduction passage created in the material of the slider is arranged on the rear surface and/or sliding surface of the slider, while the first outlet opening of the medium introduction passage is arranged on the sliding surface of the slider, in the vicinity of the first outlet opening of the medium introduction passage, on both sides of the first outlet opening, seats are indented in the sliding surface of the slider and/or running around the boundary surface of the valve body-accommodation hollow of the valve housing serving to receive the sealing members, and the sealing members are fitted into the seats.

In the case of a possible version of the device in the operation unit a feed channel suitable for guiding the acceleration medium is arranged in the continuation of the valve body-accommodation hollow of the valve housing, parallel to the axis of the valve body- accommodation hollow, preferably coaxially with it in the valve housing, opening out to its external side.

In the case of another embodiment of the invention a feed channel suitable for guiding the acceleration medium is established on the rear surface of the slider, and is connected to the first inlet opening of the medium introduction passage created in the material of the slider, furthermore, the inlet main axis of the feed channel and the axis of the valve body-accommodation hollow are coaxial with each other, while the longitudinal axis of the transfer passage and the axis of the valve body-accommodation hollow are at an angle to each other, and the first outlet opening of the medium introduction passage created in the material of the slider is arranged on the sliding surface of the slider, in the vicinity of the first outlet opening of the medium introduction passage, on both sides of the first outlet opening, seats are indented in the sliding surface of the slider and/or running around the boundary surface of the valve body-accommodation hollow of the valve housing serving to receive the sealing members, and the sealing members are fitted into the seats.

In the case of yet another different embodiment of the device in the operation unit the blow-off passage is formed by a recess machined into the sliding surface of the slider, and a groove is recessed in the sliding surface of the side valve and/or in the boundary surface of the valve body- accommodation hollow of the valve housing in the vicinity of the end of the recess closer to the second outlet opening of the medium introduction passage serving for receiving one or more sealing members, and the sealing members are fitted into the groove. ϊη the case of yet another different embodiment of the invention the blow-off passage is a transfer channel machined through the material of the slider and the second inlet opening and second outlet opening of the blow-off passage are arranged on the sliding surface of the slider, and a groove is recessed in the sliding surface of the slider and/or in the boundary surface of the valve body-accommodation hollow of the valve housing in the vicinity of the end of the second inlet opening of the blow-off passage closer to the second outlet opening of the medium introduction passage serving for receiving one or more sealing members, and the sealing members are fitted into the groove.

From the point of view of the device, it may be preferable if the space between the sealing member located. in the vicinity of the first outlet opening of the medium introduction passage and closer to the blow-off passage, and the sealing member located on the side of the blow-off passage towards the second outlet opening of the medium introduction passage is greater than the size of the opening of the transfer passage measured in the direction of movement of the slider.

In the case of another embodiment of the invention the discharge channel is established at the end of the valve body-accommodation hollow opening out in the vicinity of the external side of the valve housing, opposite to the feed channel. Furthermore, a return member is inserted between the valve housing and the slider, and the slider is forced into its basic state in this way, and with the slider in its basic state the first outlet opening of the medium introduction passage opens out into the transfer passage connected with a gas-tight connection to the channel of the separation part-unit located in the acceleration housing of the valve body of the operation unit. Optionally, the return member is a coil spring located in the vicinity of the one end of the sliding surface of the slider towards the push face, between the push face and the valve housing.

In accordance with the set aim the further device according to the invention for propelling a materia! charge using a gas-phase medium under pressure, - which comprises a charge chamber for accommodating the material charge, an acceleration housing containing an acceleration medium chamber serving for the temporary storage of the acceleration medium suitable for propelling the materia! charge, and a separation part-unit inserted between the charge chamber and the acceleration medium chamber, where the separation part-unit has a mouth linking the acceleration medium chamber and the charge chamber to each other and which can be sealed by the sealing body, an equalizer chamber and a channel serving for guiding the acceleration medium into the equalizer chamber, and the channel is connected to an operation unit containing a valve housing and a valve body cooperating with it. - established in such a way that the valve housing of the operation unit has a transfer passage that may be linked with a gas-tight sea! to the channel of the separation part-unit located in the acceleration housing, and a valve body-accommodation hollow with a first axis intersecting the longitudinal axis of the transfer passage, which opens on the external side of the valve housing, the valve body is established as a sealing piece fitted into the valve body- accommodation hollow thai may he rotated around an axis of rotation at an. angle to the fust axis of the valve body-accommodation hollow, where the sealing piece has a connection passage passing through it, the connection passage has a first opening and a second opening out to the surface of the sealing piece, the first axis of the first opening and the second axis of the second opening are at an angle of inclination, to each of 30-150°, the valve body-accommodation hollow is connected to the feed channel on the one side of the sealing piece suitable for guiding the acceleration medium to the connection passage, while the valve body-accommodation hollow is also connected to the discharge channel on the oilier side of the sealing piece that can be made to be connected to the connection passage, and the feed channel and the discharge channel are isolated from each other with a gas- tight seal.

A further feature of the device according to the invention may be that, the feed channel and the discharge channel are isolated from each other with a gas-tight seal with the help of sealing members arranged in the valve body-accommodation hollow of the valve housing and/or in the surface of the sealing piece,

The device according to the invention has numerous advantageous characteristics. The most important of these is that as a consequence of the novel arrangement of the separation part-unit and the operation unit, the device may be assembled from a smaller number of simply shaped structural elements that are easier to manufacture.

As it may be said that there is a single moving part in the separation part-unit, which performs all functions of the valve, piston and non-return valve used in the previous solution, therefore the operation of the new separation part-unit becomes significantly simpler, production costs are reduced, and operation reliability is also greater.

The new operation mechanism replaces the charging valve and discharge valve used in the earlier solution with a single moving part, which makes operation significantly simpler in the case of the new operation mechanism, and it also reduces manufacturing costs and make operation more reliable.

An advantage originating from this is that the smaller number of moving parts and the simpler acceleration housing structure increase the operation reliability and lifetime of the device. A further advantage is that the form of the novel separation part-unit and operation unit is that it results in easier operation, which, especially in the case of extinguishing fires, also makes quicker reaction times and more efficient use possible. Also greater tire extinguishing performance can be achieved by using the separation part-unit and operation unit constructed in a novel way in unison. Also these favourable characteristics have, in actual fact, great significance from the point of view of saving lives and property.

Another feature that must be viewed as an advantage is that due to the unusual arrangement the manufacture of the individual components is simpler, involves lower costs, and the assembly of the part-units requires less labour. When comparing this to the known devices with similar abilities, the cost price of the device according to the invention may be reduced due to this.

Another advantage is that as a result of its structure, the maintenance and inspection demand of the device is lower, which has a beneficial effect on operation expenses.

Still another advantage is that due to its unique structure the area of use of the device according to the invention may be significantly wider. As a version maybe conceived in which the material charge is a shaped solid body, which does not or only partially leaves the charge chamber of the acceleration housing. In such a case the given device may be used as a work tool, e.g. for breaking up concrete, making holes in sheeting, cleaning the walls of silos, or even as a cutting-pressing device. A further area of use may be when the material change is a useful device in itself, e.g. rope ladder, animal capture net, parachute, tranquiliser bullet, some sort of ball, and this device, as a material change, needs to be discharged from the acceleration housing in a short time, accelerated to a high speed in a given direction. The possible areas of use also include when a granular, powder or liquid material as a material charge, e.g. artificial fertiliser, pesticide, paint, extinguishing powder or even seed needs to be even distributed over a given area or surface, or possibly when an additive needs to be evenly distributed in the combustion chamber of a boiler.

All these new areas of use may be possible due to the novel and simpler structure promoting more reliable operation of the separation part-unit and operation unit of the device according to the invention. Also as a result of the number of devices produced, the manufacturing costs may be reduced even further.

The device according to the invention and its novel part-units are now presented in detail in connection with embodiments, on the basis of figures. Wherein

Figure 1 depicts a side view of a version of the device, partially cutaway, Figure 2 depicts a possible version of the separation part-unit of the device according to the invention while in the position fitted in the acceleration housing, in side view, partially cutaway,

Figure 3 depicts a schematic picture of another version of the separation pail-unit according to the invention, partially cutaway,

Figure 4 depicts a schematic picture of yet another different version of the separation part-unit according to the invention, partially cutaway,

Figure 5 depicts a possible embodiment of the operation unit of the device according to the invention while in the position fixed onto the acceleration housing, in side view, partially cutaway.

Figure 6 depicts a possible version of the operation unit according to the invention in longitudinal cross-section,

Figure 7 depicts a schematic picture of another version of the operation unit according to the invention, partially cutaway.

Figure 1 is a partial section view of a version of the device 1 according to the invention used for extinguishing fires. It can be easily seen that the acceleration housing 10 is made from a single piece, the internal surface 10a of which encloses the charge chamber 1 1 and the acceleration medium chamber 12. The separation part-unit 20 is located between the charge chamber 11 and the acceleration medium chamber 12, which, from the point of view of operation, temporarily separates the material charge 2 located in the charge chamber 11 and the acceleration medium 3 in the acceleration medium chamber 12.

The external end 12a of the acceleration medium chamber 12 of the acceleration housing 10 opposite the separation part-unit 20 is closed off by the end plate 13.

It is important that both the acceleration housing 10 and the end plate 13, and the acceleration housing and the separation part-unit 20 are fixed to each other with gas-tight seals. A supporting member 14 is located at the external end 1 la of the charge chamber 11 of the acceleration housing 20 opposite to the separation part-unit 20, the purpose of which is to keep the material charge 2 located in the charge chamber 11 , which may be a liquid, a powder or even a granular material, in the charge chamber 11 until the moment of discharge. As a consequence, the supporting member 14 is not attached to the acceleration housing 10 with a gas-tight connection. Moreover, it is preferable if the placing of the supporting member 14 onto the acceleration housing 10 and, optionally, its removal from there may be performed simply, manually and without any tools.

The acceleration housing 10 also carries the operation unit 40, which is fixed to the external surface 10b of the acceleration housing 10 so that the operation unit 40 and the separation part-unit 20 are in a connection with each other that permits medium flow, but that is realised with a gas-tight seal.

Moving over to figure 2, this shows a possible version of the separation part-unit 20 according to the invention fixed in the acceleration housing 0 of the device 1. It may be observed that the separation part-unit 20 comprises the valve housing 21 and the valve seat 23, which together enclose the internal space 22. The sealing body 30 is moveably located in this internal space 22. The valve housing 21 and the valve seat 23 are preferably made from two pieces, and, in this version, contain a sealing ring 27 that makes it possible for a gas-tight seal to be created between the internal surface 10a of the acceleration housing 10 and the separation part-unit 20 when the separation part-unit 20 is fitted into the acceleration housing 10. So, in this way, the combination of the valve housing 21 and the valve seat 23 of the separation unit 20 itself separates the charge chamber 11 and the acceleration medium chamber 12 from each other.

The internal space 22 enclosed by the internal wall 21 of the valve housing 21 and the valve seat 23 is essentially divided into two parts by the sealing body 30. The one part is the equalizer chamber 22a and the other is the intermediate space part 22b, The equalizer chamber 22a is connected to the channel 26, The task of the channel. 26 is to make it possible to fill up the acceleration medium chamber 12 of the acceleration housing 10 with acceleration medium 3, and also, when the material charge 2 located in the charge chamber 11 is accelerated or discharged to make it possible for the acceleration medium 3 located in the equalizer chamber 22a at a given pressure to leave in the direction of the channel 26,

Figure 2 illustrates well that the sealing body 30 comprises the carrying part 31 and the backflow preventive unit 32, which form a single assembled unit, The carrying part 31 is a disc preferably made out of metal, the side surface 31 a of which is in contact with the internal wall 21 a of the valve housing 21 in the case of the given embodiment of the separation part-unit 20, but in given sections it has passages 31b that open a space "K" between the internal wall 21a of the valve housing 21 and the material of the carrying part 31 , Naturally the passage 31b may be a bore through the material of the carrying part 31 or even a slot created in the side surface 31 a of the carrying part 31. In all cases the task of the passage 31b is to make it possible for the acceleration medium 3 in the equalizer chamber 22a to pass through the carrying part 31 in the direction of the valve seat 23.

In the case of the given embodiment the backflow preventive unit 32 is a lip seal 32a made from a flexible material, such as rubber, which has a truncated cone shaped external surface 32b at an angle of inclination "a" to the main axis 30a of the sealing body 30, an internal surface 32c also in the form of a truncated cone, and a sealing surface 32d in the shape of a circular plate enclosed by the internal surface 32c. The lip seal 32a is established and fixed to the carrying part 31 so that the free gap 21c delimited by the external surface 32b, the carrying part 31 and the internal wail 21a of the valve housing 21. the cross-section of which in the direction of the main axis 30a is in the shape of a ight angled triangle, has a width that decreases from the direction of the carrying part 31 towards the valve seat 23,

It is also important that the non-constrained end 32e of the flexible protrusion delimited by the external surface 32b and internal surface 32c of the lip seal 32a forming the backflow preventive unit 32 is pushed up against, the internal wail 21a of the valve housing 21 , and in this way it separates the equaliser chamber 22a of the internal space 22 and the intermediate space part 22 b from each other. The appropriate shaping of the lip seal 32a makes it possible for the acceleration medium 3 to pass from the equalizer chamber 22a, with the non-constrained end 32e of the lip seal 32a forced to deform, into the intermediate space part 22b and also so thai the pressurised acceleration medium cannot flow back from the intermediate space part 22b in the direction of the equalizer chamber 22a.

With the device 1 in its basic status figure 2 also illustrates well that the sealing surface 32d of the lip seal 32a forming the backflow preventive unit 32 rests on the sealing face 23a of the valve seat 23 and by this seals off the mouth 24, in this way preventing the acceleration medium chamber 12 and the charge chamber 1 1 being connected to each other, so as to enable the flow of medium.

Apart from the channel 26 the valve housing 21 of the separation part-unit 20 also has charging passages 25, which are arranged on the valve housing 21 to connect the internal wall 21a and the external wall 21b of the valve housing 21, and so make it possible for the acceleration medium 3 to flow freely between the intermediate space part 22b comprising a part of the internal space 22 of the valve housing 21 and the acceleration medium chamber 12, it must he noted here that the carrying part. 31 of the sealing body 30 must, depending on the force exerted on it, be set up to be able to slip, without getting stuck, in the equalizer chamber 22a of the internal space 22 of the valve housing 21 in the direction of the main axis 30a of the sealing body 30, both in the directions of the valve seat 23 and the acceleration medium chamber 12,

Now moving over to figure 3, this depicts a schematic view of another embodiment of the separation part-unit 20 of the device 1. The valve housing 21 and the valve seat 23 may also be found here, the combination of which separates the charge chamber 11 and acceleration medium chamber 12 from each other, Here also, the internal wall 21a of the valve housing 21 encloses the internal space 22, which is separated by the sealing body 30 into the equalizer chamber 22a and the intermediate space part 22b. Also, the intermediate space part 22b is linked to the acceleration medium, chamber 12 of the acceleration housing 10 by ihe charging passages 25 established on the valve housing 21. While the channel 26 of the valve housing 21 opens out into the equalizer chamber 22a of the internal space 22.

Here the sealing body 30 has a carrying part 31 and backflow preventive unit 32. The unique feature of the arrangement of the sealing body 30 in the case of this embodiment is that the carrying part 31 made from a rigid material itself rests up against the sealing face 23a of the valve seat 23, and in this way seals the mouth 24 enclosed by the sealing face 23a of the valve seat 23, which, via the valve seat 23, connects the charge chamber 11 of the acceleration housing 10 to the intermediate space part 22b of the internal space 22 of the valve housing 21 of the separation part-unit 20.

The space " " may be found between the side surface 31 of the carrying part. 31 and the internal wall. 21a of the valve housing 21. but here the sealing element 32f belonging to the backflow preventive unit 32 is located between the side wall 31a of the carrying part 31 and the internal wall 21a of the valve housing 21. The task of the sealing element 32f is to separate the equalizer chamber 22a of the internal space 22 and the intermediate space part 22b with a gas-tight seal and to prevent the acceleration medium 3 from flowing in the space "K" established between the carrying part 31 and the valve housing 21 from the equalizer chamber 22a into the intermediate space part 22b and back. Naturally, the carrying part 31 of the sealing body 30 is positioned in the internal space 22 of the valve housing 21 so that it is able to slide without being obstructed or getting stuck in the direction of the main axis 30a of the sealing body 30, both in the directions of the charge chamber 11 and the acceleration medium chamber 12, depending on the pressure conditions in existence in the acceleration housing 10.

In the case of the given version of the separation part-unit 20, apart from the sealing element 32f the backflow preventive unit 32 also has a sealing body 32g and an energy storage member 32h. Here the sealing body 32g is a ball, while the energy storage member is a coil spring, which are fitted into the passage 31b of the carrying part 31 so that the combination of the sealing body 32g and the energy storage member 32h form a non-return valve in the passage 31b of the carrying part 31. The task of the backflow preventive unit 32 set up in this way is for the energy storage member 32h to push the sealing body 32g into the passage 31b of the carrying part 31 so that the acceleration medium 3 is able to pass from the equalizer chamber 22a through the passage 31b to the intermediate space part 22b of the internal space 22, but so that the acceleration medium 3 is unable to flow back from the intermediate space part 22b in the direction of the equalizer chamber Figure 4 also presents a schematic picture of an embodiment of the separation part-unit 20 according to the invention. Also, located here are the housing 21, the valve seat 23 and the internal space 22 delimited by the interna! wall 21 a of the valve housing 21, a part of which is the equalizer chamber 22a. Here also the equalizer chamber 22a is connected to the channel 26, through which the acceleration medium 3 may pass into the equalizer chamber 22a of the internal space 22, Here too the sealing body 30 is located in the internal space 22, which sealing body 30 has a carrying part

31 and a backflow preventive unit 32 built together with it. Here also the backflow preventive unit

32 contains the sealing element 32f, the sealing body 32g and the energy storage member 32h. Apart from this, in the case of this embodiment also the carrying part 31 rests against the valve seat 23 and seals the mouth 24.

In the ease of the given separation part-unit 20, the task of the sealing element 32f, similar to that presented in connection with figure 3, is by being positioned between the side surface 3 la of the carrying part 31 and the internal wall 21a of the valve housing 21 to prevent the acceleration medium 3 there exiting from the equalizer chamber 22a and returning back.

The fundamental structural difference between the separation part-unit 20 presented in figure 3 and the separation part-unit 20 presented in figure 4 is that her the sealing body 32g is a plate thai is laid on the passage 31b established in the carrying part 31 from the direction of the intermediate space part 22b of the internal space 22, while the energy storage member 32b is a flexible protrusion fixed to the plate forming the sealing body 32g that is fixed to the carrying part 31 above the passage 31b. Here the purpose of the sealing body 32g - energy storage member 32h combination is to act as a non-return valve and enable the flow of the acceleration medium 3 from the direction of the equalizer chamber 22a through the passage 31b to the intermediate space par 22b, but to prevent backflow of the acceleration medium 3 from the intermediate space part 2b into the equalizer chamber 22a.

The operation of the device 1 fitted with the separation part-unit 20 according to the invention and presented in figure 2 is the following. The material charge 2 must, be placed in the charge chamber 11 of the acceleration housing 10, in a known way, then the acceleration medium 3 needs to be introduced into the channel 26 of the valve housing 21 of the separation part-unit 20 fixed in the acceleration housing 10 by the the operation unit 40. Passing through the channel 26 and arriving in tiie equalizer chamber 22a of the internal space 22 of the valve housing 21, the acceleration medium 3 hits up against the carrying part 31 of the sealing body 30 and presses it in the direction of the valve seat 23 along the main axis 30a of the sealing body 30, it forces the sealing surface 32d of the backflow preventive unit 32 up against the sealing face 23a of the valve seat 23, by this sealing off the mouth 24 of the valve seat 23, In this way, the acceleration medium 3 is unable to get into charge chamber 11 of the acceleration housing 10 via the transfer passage 24.

The acceleration medium 3 flowing through the channel 26 into the equalizer chamber 22a is unable to move the sealing body 30 forced up against the sealing face 23 a of the valve seat 23 any further, therefore the pressure of the acceleration medium 3 in the equalizer chamber 22a increases. The compressed acceleration medium 3 passing through the transfer passages 31b of the carrying part 31 reaches the free gap 21c forming a part of the internal space 22, and is forced up against the flexible external surface 32b of the lip seal 32a forming the backflow preventive unit 32, and when a given pressure is reached it bends it so that the non-constrained end 32e of the lip seal 32a moves away from the internal wall 21 of the valve housing 21. At this time the acceleration medium 3 is able to flow through the intermediate space part 22b of the internal space 22 and from there, through the charging passages 25, it passes without obstruction into the acceleration medium chamber 12 delimited by the external wall 21b of the valve housing 21 and the internal surface 10a of the acceleration housing 10, and the acceleration medium 3 fills it completely.

When the filling of the acceleration medium chamber 12 is complete, then the flow of the acceleration medium 3 through the channel 26 into the equalizer chamber 22a of the internal space 22 of the valve housing 21 can be stopped using the operation unit 40, then by using the operation unit 40 the pressure of the acceleration medium 3 in the equalizer chamber 22a - which pressure is equal to the pressure of the acceleration medium 3 in the acceleration medium chamber 12 but greater than atmospheric pressure - can be reduced by opening the channel 26.

As the pressure of the acceleration medium 3 drops in the equalizer chamber 22a, the pressure exerted on the carrying part 31 of the sealing body 30 also drops. As a consequence of this the pressure of the compressed acceleration medium 3 in the intermediate space part 22b of the internal space 22 exerted on the internal surface 32c of the Hp seal 32a of the backflow preventive unit 32. on the one part, forces the non-constrained end 32e of the lip seal 32a up against the internal wall 21a of the valve housing 21, and by this prevents the acceleration medium 3 in the intermediate space part 22b leaking into the equalizer chamber 22a. On the other hand, it moves the lip seal 32a and, along with it, the carrying part 31 in the direction of the equalizer chamber 22a of the valve housing 21. Due to the movement of the sealing body 30 the sealing surface 32d of the lip seal 32a moves away from the sealing face 23a of the valve seat 23 of the separation part-unit 20 and the mouth 24 becomes free. The compressed acceleration medium 3 located in the acceleration medium chamber 12 flows almost explosively, at a high speed through the mouth 24 into the charge chamber 11 of the acceleration housing 10, where it pushes the material charge 2 previously placed in the charge chamber 11 , meanwhile the pressure increases in the vicinity of the sealing surface 32d and moves the sealing body 30 exceptionally quickly in the direction of the equalizer chamber 22a,

Using the energy obtained from the acceleration medium 3 flowing in through the mouth 24 the material charge 2 accelerates, and depending on the type and function of the material charge 2 it either purge out of the charge chamber 11 of the acceleration housing 10 through the supporting member 14 into the environment, and on coming into contact with the particles of air in the environment ii forms a finely distributed mist, e.g. for the purpose of extinguishing a fire.

Or just approaches or possibly reaches the external end 1 la of the charge chamber 1 1, and there passes on the kinetic energy obtained from the acceleration medium 3 either to the environment or to the target body, e.g. the wail of a cement silo that the device 1 comes into contact with. Achieving with this, for example, that the cement stuck to the wall of the cement silo is detached from it.

Of the device has the separation part-unit 20 that appears in figures 3 and, then the behaviour of the acceleration medium 3 flowing into the equalizer chamber 22a of the internal space 22 of the valve housing 21 differs from that presented previously in that after forcing the carrying part 31 of the sealing body 30 up against the sealing face 23a of the valve seat 23, the acceleration medium 3 with increasing pressure is unable to flow from the equalizer chamber 22a between the side surface 31a of the carrying part 31 and the internal wall 21a of the valve housing 21 into the intermediate space part 22b due to the sealing element 32f of the baekflow preventive unit 32, therefore the carrying part 31 is forced into the passage 31b, where it moves the sealing body 32g, e.g. bail or plate, sealing off the passage 31b against the energy storage member 32h, e.g. coil or leaf spring, in the direction of the valve seat 23, and in this way it flows through the passage 31b into the intermediate space part 22b, then from there through the charging passage 25 into the acceleration medium chamber 12. When the filling of the acceleration medium chamber 12 is completed, then the pressure of the acceleration medium 3 in the equalizer chamber 22a and in the intermediate space part 22b is equalised, and the sealing body 32g is forced back into its basic status by the energy storage member 32h.

However, in the case of a drop in pressure in the equalizer chamber 22a the baekflow preventive unit 32 does not make possible for the higher eSs re acceleration medium 3 in the intermediate space part 22b to get back into the equalizer chamber 22a through the sealing body 32g forced into the passage 31b of the carrying part 31 by the energy storage member 32h. therefore the medium in the intermediate space pail 22b even now pushes back the carrying part 31 towards the equalizer chamber 22a, by this opening the mouth 24 of the valve seat in the interest of the flowing of the compressed acceleration medium 3.

Figure 5 presents a possible version of the novel operation unit 40 forming a part of the device 1 according to the invention. It can be seen that the external side 41a of the valve housing 41 of the operation unit 40 is partially connected to the external surface 10b of the acceleration housing 10, also that the valve housing 41 has a transfer passage 42, which passes through the acceleration housing 10 of the device 1 and opens out in the channel 26 of the separation part-unit 20 fixed to the internal surface 10a of the acceleration housing 10, indicated here with a thick broken line. In this way the operation unit 40 is able to connect to the separation part-unit 20 in a way allows the flow of medium.

In the case of this embodiment the operation unit 40 itself is fitted into a grip 90 facilitating the operation of the device 1, which, however, only serves aesthetic and comfort functions, but does not influence the operation of the operation unit 40 and the device 1 ,

The valve housing 41 of the operation unit 40 also comprises the valve body-accommodation hollow 43, and in such a way that the longitudinal axis 42a of the transfer passage 42 and the axis 43a of the valve body-accommodation hollow are at an angle to each other, at a right angle in the present case. The boundary surface 43b of the valve body-accommodation hollow 43 is in the shape of a cylinder or rectangular face, and in this the valve body 45 is able to slide back and forth in a regulated way along the axis 43a of the valve body-accommodation hollow 43. in the ease of this embodiment the valve housing 41, the feed channel 60 opens laterally into the valve body- accommodation hollow 43, which is connected to the coupling 44 fixed to the external side 41a of the valve housing 41.

The purpose of the coupling 44 is to be able to connect the vessel - not indicated in the figures - supplying the device 1 with acceleration medium 3 to the operation unit 40 with a gas-tight seal and eventually to the channel 26 of the separation part-unit 20 located in the acceleration housing 10 of the device 1. In the case of the given arrangement the axis 43a of the valve body-accommodation hollow 43 and the inlet main axis 60a of the pari of the feed channel 60 opening into the valve body-accommodation hollow 43 are perpendicular to each other, furthermore the inlet main axis 60a and the longitudinal axis 42a are in a single plane.

Figure 5 also illustrates well that here the valve body 45 is a slider 45a with several functional formations being arranged in the sliding surface 45b of which between the first end 45c and the second end 45d. The rear surface 45f of the second end 45d of the slider 45a is structured so that in the given position it is lodged in the external side 41a of the valve housing 41 of the operation unit 40, limiting by this the movement of the slider 45a in the one direction. A push face 45e is formed at the first end 45c of the slider 45a, which has a trigger 91 facilitating the operation of the slider 45a, i.e. its sliding. A return member 80, in this case a coil spring, is located between this trigger 91 and the valve housing 41 of the operation unit 40, which forces the slider 45a back to its basic position.

The medium introduction passage 46 is constructed in the section of the sliding surface 45b of the slider 45a closer to the rear surface 45f, while a recess 45g forming the blow-off passage 47 is constructed in the section close to the push face 45e. The medium introduction passage 46 and the recess 45g comprise machined around the sliding surface 45b of the slider 45a, The medium introduction passage 46 is arranged on the sliding surface 45b of the slider 45a so that in the basic position of the slider 45a -as can be seen in figure 5- the first inlet opening 46b of the medium introduction passage 46 is positioned precisely at the opening of the feed channel 60 to the valve body-accommodation hollow 43 of the valve housing 41, while the first outlet opening 46e of the medium introduction passage 46 is positioned at the opening of the transfer passage 42 of the valve housing 41 in the valve body-accommodation hollow 43 of the valve housing 41.

The distance "T" between the first edge point 46a of the first outlet opening 46c of the medium introduction passage 46 at the first end 45c of the slider 45a and the second edge point 47a of the recess 45g of the blow-off passage 47 at the second end 45d of the slider 45a is selected to be larger than the greatest opening "D" of the transfer passage 42 located in the axis 43 a of the valve body- accommodation -hollow 43. This requirement is important because while the slider 45a is moving, i.e. during the operation of the device 1, the transfer passage 42 may never directly connect the medium introduction passage 46 and the recess 45g of the blow-off passage 47.

On two sides of the medium introduction passage 46 seats 48 are machined as a circular groove in the sliding surface 45h of the slider 45a, encompassing the first inlet opening 46b and the first outlet opening 46c, and sealing members 50, e.g. O-rings, are positioned in the seats 48. The purpose of the sealing members 50 is to seal the medium introduction passage 46 with a gas-tight seal from the other parts of the valve body-accommodation hollow 43 of the valve housing 41, and in this way ensures that the acceleration medium 3 getting into the feed channel 60 passes through the medium introduction passage 46 and only gets into the transfer passage 42.

The groove 49 is also recessed into the sliding surface 45b of the slider 45a, which, however, is located in the vicinity of the second edge point 47a of the recess 45g of the blow-off passage 47. and in which another, preferably O-ring shaped sealing member 50 is fitted. The purpose of this sealing member 50 is to ensure the seal of the transfer passage 42 while the slider 45a is moving in the transitional position when the slider 45a moves to the left:, with respect to figure 5, and the transfer passage 42 gets between the medium introduction passage 46 and blow-off passage 47 of the slider 45a sliding in the vaive body-accommodation hollow 43, From the point of view of operation reliability it is important that the space "L" between the seat 48 closer to the first edge point 46a of the medium introduction passage 46 and the groove 49 is greater than the opening "D" of the transfer passage 42 in the direction of motion of the slider 45a, i.e. in the axis 43a of the valve body-accommodation hollow 43, in the case of the operation unit 40 according to figure 5, the blow-off passage 47 is located at the end 43c of the valve body-accommodation hollow 43 so that it essentially penetrates into the discharge channel 70 enclosed by the valve housing 41, the grip 90, the trigger 91 and the external surface 10b of the acceleration housing 10. The purpose of the discharge channel 70 is to safely guide the acceleration medium 3 flowing back from the channel 26 of the separation pail-unit 20 into the environment.

Moving over to figure 6» it shows another valve body 45 that may be fitted into valve body- accommodation hollow 43 of the valve housing 41 , This valve body 45 is also established as a slider 45a, however the structure of the medium introduction passage 46 and of the blow-off passage 47 are significantly different to that presented in figure 5, Here both the medium introduction passage 46 and the blow-off passage 47 are formed as bores machined in the material of the slider 45a.

Another difference is that here the feed channel 60 is established in the rear surface 45f of the second end 45d of the slider 45a in such a way that the inlet main axis 60a of the feed channel 60 is coaxial with the axis 43a of the valve body-accommodation hollow 43 and the axis of the slider 45a. The coupling 44 is fitted to the rear surface 45f at the second end 45d of the slider 45a, and connects to the feed channel 60 in this way. The first inlet opening 46b of the medium introduction passage 46 is established as a continuation of the feed channel 60, and the first inlet opening 46b of the medium introduction passage 46 is essentially a bore equal to the size of the opening "D" of the transfer passage 42,

Here also the transfer passage 42 is established in the valve housing 43 of the operation unit 40 so that the longitudinal axis 42a of the transfer passage 42 is at an angle to the axis 43a of the valve body-accommodation hollow 43 of the valve housing 41 , It is preferable if the angle between the longitudinal axis 42a and the axis 43a is a right angle. Here the blow-off passage 47 comprises the second inlet opening 47c, and the second outlet opening 47d located on the sliding surface 45b of the slider 45a and, between these two, the transfer channel 47b passing through the material of the slider 45a. Here also the blow-off passage 47 is formed in the slider 45a near to the push face 45e of the first end 45c of the slider 45a. while the medium introduction passage 46 starts from near the second end 45d of the slider 45a.

The seats 48 in the form of a groove recessed in the sliding surface 45b can also be found here on the side of the first outlet opening 46c of the medium introduction passage 46 towards the first end 45c of the slider 45a and on the side towards the second end 45d of the slider 45a, into which the sealing members 50 are snapped. Furthermore, a groove 49 is located on the side on the second inlet opening 47c of the blow-off passage 47 towards the second end 45d of the slider 45a, in which the sealing member 50 is fitted. Here also the space "L" between the adjacent seats 48 and groove 49 is greater than the opening "D" of the transfer passage 42 in the axis 43a of the valve body- accommodation hollow 43,

The distance "T" between the first edge point 46a of the first outlet opening 46e of the medium introduction passage 46 towards the blow-off passage 47 and the second edge point 47a of the second inlet opening 47c of the blow-off passage 47 towards the medium introduction passage 46 is larger than the size of the opening "D" of the transfer passage 42 in the direction of the axis 43a of the valve body-accommodation hollow 43.

It is obvious that the space "L" between the groove 49 and the neighbouring seat 48 is smaller than the distance "T" between the first edge point 46a of the first outlet opening 46c of the medium introduction passage 46 and the second edge point 47a of the second inlet opening 47c of the blow- off passage 47,

Figure 7 also shows a version of the operation unit 40 according to the invention. Here also the feed channel 60 and the discharge channel 70 may be found in the valve housing 41 of the operation unit 40, also the axis 43a of the valve body-accommodation hollow 43 and the inlet main axis 60a of the feed channel 60 are coaxial, furthermore the axis 43a of the valve body-accommodation hollow 43 and the longitudinal axis 42a of the transfer passage 42 are perpendicular to each other.

In the case of this embodiment the feed channel 60 and the discharge channel 70 are formed substantially as a single tube in the valve housing 41 of the operation unit 40, and the feed channel 60 and the discharge channel. 70 are separated and isolated from each other by the valve bod}' 45. The valve body 45, however, diverging from that presented in connection with figures 5 and 6, is a sealing piece 45h, the axis of rotation 451 of which is at the angle "β"₅ here 90°, to the axis 43a of the valve body- accommodation hollow 43. in the case of the given embodiment the axis of rotation 45i, with respect, to figure 6. points out from the plane of the sheet. The connection passage 45k is established in the sealing piece 45h. The first opening 451 and the second opening 45n of the connection passage 45k are located on the surface 45j of the sealing piece 45h, and in such a way that the first axis 45m of the first opening 451 and the second axis 45o of the second opening 45n are located in the same plane and are at an angle of inclination "γ" to each other of between 30°- 150°, here an angle of inclination "γ" of 90°, It must be noted here that the axis 43a of the valve body-accommodation hollow 43 also in the plane of the first axis 45m and the second axis 45o. it must also be noted here that a version of the operation unit 40 according to figure 7 is also conceivable in which the axis of rotation 451 of the sealing piece 45h is coaxial with the longitudinal axis 42a of the transfer passage 42, for example. In this case the sealing piece 45h turns in a different way and it is achieved in a different way that the situation of the sealing piece 45h connecting the feed channel 60 with the transfer passage 42 changes to the sealing piece 45h connecting the transfer passage 42 with the discharge channel 70.

The use of the operation unit 40 presented in figure 5 is as follows. With the operation unit 40 in its basic status,- which complies with the status according to figure 5, the return member 80 maintains the valve body 45 in such a position in which the rear surface 45f of the slider 45a rests up against the external side 41a of the valve housing 41 of the operation unit 40. In this case the first inlet opening 46b of the medium introduction passage 46 of the slider 45a meets the feed channel 60, while its first outlet opening 46c meets the transfer passage 42,

When the acceleration medium 3 gets into the feed channel 60 via the coupling 44, then it reaches the first outlet opening 46c of the medium introduction passage 46 without obstruction through the first inlet opening 46b of the medium introduction passage 46 and through the medium introduction passage 46 and progresses to the transfer passage 42, from where it gets into the channel 26 of the separation part-unit 20. and, according to that presented in connection with figure 2, the device 1 according to the invention is filled with acceleration medium 3,

In order to shoot the device 1 the user pulls the trigger 91 of the grip 90 with his/her finger, which trigger 91 moves in the direction of the axis 43a of the valve body-accommodation hollow 43 in opposition to the return member 80 from right to left, with respect to figure 5. By pulling the trigger 91 the slider 45a of the valve body 45 starts to slide in the valve body-accommodation hollow 43 of the valve housing 41 of the operation unit 40, While the slider 45a is moving the medium introduction passage 46 located on the sliding surface 45b also moves to the left and the first edge point 46a of the first outlet opening 46c of the medium introduction passage 46 first slides in front of the transfer passage 42, then progressing to the left it leaves the projection of the transfer passage 42. When the slider 45a slides further on the sealing member 50 positioned in the seat 48 on the right side of the medium introduction passage 46 passes in front of the transfer passage 42 and when it reaches it left side first it closes off the path of the acceleration medium 3 flowing into the feed channel 60 towards the transfer passage 42. in this way, therefore, on the one hand the filling of the channel 26 with acceleration medium 3 stops, and, on the other hand, the section of the sliding surface 45b of the slider 45a encompassed by the seat 48 and the groove 49, and the sealing members 50 placed in these slides in front of the transfer passage 42, which due to the sealing members 50 also prevents the acceleration medium 3 already charged into the separation part-unit 20 from flowing back from the transfer passage 42 through the channel 26,

Following this, as the slider 45a continues to move the sealing member 50 located in the groove 49 reaches the transfer passage 42, and when it passes over it, then the recess 45g near to the first end 45c of the slider 45a gets under the transfer passage 42, However, the recess 45g belongs to the ^•unsealed blow-off passage 47, and so a part of the acceleration medium 3 in the channel 26 can now escape from the transfer passage 42, due to which, in the way presented in figure 2. the pressure of the acceleration medium 3 in the equalizer chamber 22a drops and the sealing body 30 rises from the sealing face 23a of the valve seat 23, and so high speed and high pressure acceleration medium 3 flows from the acceleration medium chamber 12 of the device 1 through the mouth 24 into the charge chamber 11 and the device is "discharged".

When the trigger 91 is released the tensioned return member 80 pushes the trigger 91 back into its initial position, which also forces the slider 45a into its basic position. At this time the acceleration medium 3 can once again flow through the transfer passage 42 into the channel 26 and the filling up of the device with acceleration medium 3 can be performed once again.

In the case of the valve body 45 according to figure 6, the operation of the operation unit 40 of the device 1 is the same, as the valve body 45 in the case of this too is a slider 45a. The only difference is that when the second inlet opening 47c of the blow-off passage 47 reaches the transfer passage 42, then the part of the acceleration medium 3 in the transfer passage 42 may leave the operation unit 40 througli a regulated transfer channel 47b, and the discharge of the acceleration medium 3 is realised through the second outlet opening 47d of the transfer channel 47b of the slider 45a,

As opposed to this, in the case of the operation unit 40 according to figure 7, the valve body 45 does not slide in the valve body-accommodation hollow 43, instead it rotates around its axis of rotation 45i. In the given basic position the connection passage 45k of the sealing piece 45h connects the feed channel 60 to the transfer passage 42, while after the sealing piece 45h has rotated around the axis of rotation 451, which, depending on the position of the axis of rotation 45 i, may be. for example, 180° or 270°, the connection passage 45k links the transfer passage 42 to the discharge channel 70.

The device according to the invention may be used to good effect in all cases when a material charge needs to be accelerated to a high speed for the purpose of discharge or for other work under simple and reliable operation conditions. The device according to the invention is especially suitable for finely distributing an extinguishing medium in the vicinity of a fire, and for extinguishing the fire.

List of references device

material charge acceleration medium

acceleration housing 10a internal surface

10b external surface

11 charge chamber

1 la external end

12 acceleration medium chamber 12a external end

3 end plate

14 supporting member separation part-unit 21 valve housing

21a internal wall

21b external wall

21c free gap

22 internal space

22a equalizer chamber

22b intermediate space part

23 valve seat

23a sealing face

24 mouth

25 charging passage

26 channel

27 sealing ring sealing body 30a main axis

31 carrying part

31a side surface

31b passage

32 backflow preventive unit

32a lip seal

32b external surface

32c internal surface

32d sealing surface

32e non-constrained end

32f sealing element.

32g sealing body

32h energy storage member operation unit 41 valve housing

41a external side

42 transfer passage

42a longitudinal axis

43 valve body-accommodation hollow 43a axis

43 b boundary surface 43 e end

44 coupling

45 valve body

45a slider

45b outer surface

45c first end

45d second end

45e push face

45f rear surface

45g recess

45h sealing piece

451 axis of rotation

45j surface

45k connection passage 451 first opening

45m first axis

45n second opening

45o second axis

46 medium introduction passage 46a first edge point

46b first inlet opening

46c first outlet opening

47 blow-off passage

47a second edge point

47b transfer channel

47c second inlet opening 47d second outlet opening

48 seat

49 groove

50 sealing part

60 feed channel · 60a inlet main axis

70 discharge channel

80 return member

90 grip 91 trigger

^S'D" opening

^;K" space !

"L" space2

T" distance

" " angle of inclination β" angle ^;'γ" angle of inclination

Claims

1. Device for propelling a material charge using a gas-phase medium under pressure, which comprises a charge chamber (11) for accommodating the material charge (2), an acceleration housing (10) containing an acceleration medium chamber (12) serving for the ieinporary storage of the acceleration medium (3) suitable for propelling the material charge (2), and a separation part- unit (20) inserted between the charge chamber (1 1) and the acceleration medium chamber (12), where the separation part-unit (20) has a valve housing (21) delimiting the interior space (22) of the separation part-unit (20) and a valve seat (23) cooperating with it, as well as a sealing body (30) positioned in the valve housing (21) in a way so that it may slide, furthermore, at least one of the valve housing (21) and the valve seat (23) is securely fixed to the acceleration housing (10), the separation part-unit (20) has a charging passage (25) established on the valve housing (21) and connecting the interior space (22) of the separation part-unit (20) with the acceleration medium chamber (12), while the valve seat (23) of the separation part-unit (20) has a mouth (24) surrounded by a sealing face (23a), and the interior space (22) of the separation part-unit (20) is connected to the charge chamber (11) via the mouth (24), with the device (1) in its basic state an equalizer chamber (22a) isolated from both the charge chamber (11) and the acceleration medium chamber (12) by the sealing body (30) is separated from the separation part-unit (20), and the equalizer chamber (22a) is connected to an operation unit (40) via a channel (26) serving for taking the acceleration medium (3) to the equalizer chamber (22a), characterised by that the sealing body (30) has a rigid carrying pail (31) and a backflow preventive unit (32) coupled to it, and, on the one part, the equalizer chamber (22a) of the valve housing (21) is separated from the interior space (22) by the backflow preventive unit (32), and, on the other part, the intermediate space part (22b) between the equalizer chamber (22a) and the charging passage (25) is isolated from the interior space (22) of the separation part-unit (20) by the backflow preventive unit (32), where the charging passage (25) is in a connection with the intermediate space part (22b) that, allows direct flow of medium, and the backflow preventive unit (32) of the sealing body (30) is secured to the carrying part (31) of the sealing body (30) so as to allow unidirectional release of the acceleration medium (3) from the equalizer chamber (22a) into the intermediate space pari (22b) but to prevent backflow of the acceleration medium (3) from the Intermediate space part (22b) into the equalizer chamber (22a).

2. The device according to claim 1, characterised by that the side surface (31a) of the carrying part (31) of the sealing body (30) facing the internal wall (21a) of the valve housing (21) that delimits the equalizer chamber (22a) and the internal wail (21a) of the valve housing (21) that also delimits at least a section by a space ( ) connected to the equalizer chamber (22a), and/or the equalizer chamber (22a) and the intermediate space part (22b) are established with a passage (31b) linking them to each other in the material of the carrying part (31) of the sealing body (30).

3. The device according to claim 1 or 2, characterised by that the backflow preventive unit (32) of the sealing body (30) is formed by a lip seal (32a) with an external surface (32b) in the shape of a conical boundary, coaxial with the main axis (30a) of the sealing body (30), an internal surface (32c) in the shape of a concave conical boundary and a sealing surface (32d), where the conical shaped external surface (32b) of the backflow preventive unit (32) delimits the equalizer chamber (22a) of the valve housing (21), while the concave conical internal surface (32c) of the backflow preventive unit (32) delimits the intermediate space part (22b) of the internal space (22) delimited by the valve housing (21 ) of the separation part-unit (20) connected to the charging passage (25), furthermore, the sealing body (30) in its basic state is in contact with the sealing face (23 a) of the valve seat (23) of the separation part-unit (20) surrounding the mouth (24), furthermore the conical shaped external surface (32b) of the backflow preventive unit (32) is in contact with the internal wall (21a) of the valve housing (21) delimiting the equalizer chamber (22a), and the sealing surface (32d) of the backflow preventive unit (32) enclosed by the concave conical shaped internal surface (32c).

4. The device according to claim 3, characterised fey that the backflow preventive unit (32) is made from a flexible material

5. The device according to claim 1 or 2, characterised by that the conical shaped external surface (32b) of the backflow preventive unit (32) at an acute angle to the main axis (30a) of the sealing body (30) and the internal wall (21a) of the valve housing (21) also delimiting the equalizer chamber (22a) where a free gap (21c) formed of decreasing size from the direction of the equalizer chamber (22a) towards the direction of the non-constrained end (32e) of the backflow preventive unit (32).

6. The device according to claim 1 or 2, characterised by that the side surface (31a) of the carrying part (31) of the sealing body (30) facing the internal wall (21a) of the valve housing (21 ) that also delimits the equalizer chamber (22a) is supplied with a sealing element (32f) belonging to the backflow preventive unit (32), and the equalizer chamber (22a) of the internal space (22) of the separation part-unit (20) and the intermediate space pari (22b) are isolated from each other, furthermore, the carrying part (31) of the sealing body (30) has a passage (31b), in addition to the sealing element (32f) the backflow preventive unit (32) is formed by a sealing body (32g), one-way sealing the passage (31b) of the carrying part (31) of the sealing body (30), and an energy storage member (32h) working with the sealing body (32g), where the energy storage member (32h) is, on the one hand, connected to the sealing body (30), and, on the other hand, the sealing body (32g) is forced into the passage (31 b) by pressure in the direction of the equalizer chamber (22a) by the energy storage member (32h).

7. The device according to any of claims 1 to 6, characterised by that the acceleration housing (10) is made from, a single piece.

8. The device according to claim 7, characterised by that the acceleration housing (10) has a tubular shape supplied with an end plate (13) providing a gas-tight seal for the external end (12a) of the acceleration medium chamber (12).

9. The device^' ccording to any of claims 1 to 8, characterised by that the valve housing (21) of the separation part-unit (20) and the valve seat (23) are fixed together so that they are immobile with respect to each other, and the separation part-unit (20) assembled in this way is fixed to the acceleration housing (10) with a gas-tight seal

10. Device for propelling a material charge using a gas-phase medium under pressure, which comprises a charge chamber (11) for accommodating the material charge (2), an acceleration housing ( 0) containing an acceleration medium chamber (12) serving for the temporary storage of the acceleration medium (3) suitable for propelling the material charge (2), and a separation part- unit (20) inserted between the charge chamber (11) and the acceleration medium chamber (12), where the separation part-unit (20) has a mouth (24) linking the acceleration medium chamber (12) and the charge chamber (1 1) to each other and which sealed by the sealing body (30), an equalizer chamber (22a) and a channel (26) guiding the acceleration medium (3) into the equalizer chamber (22a), and the channel (26) is connected to an operation unit (40) containing a valve housing (41) and a valve body (45) cooperating with it, characterised by that the valve housing (41) of the operation unit (40) has a transfer passage (42) that may be linked with a gas-tight seal to the channel (26) of the separation part-unit (20) located in the acceleraiion housing (10), and a valve body- accommodation hollow (43) with an axis (43a) intersecting the longitudinal axis (42a) of the transfer passage (42), which opens on the external side (41a) of the valve housing (41), the valve body (45) is established as an elongated shaped slider (45a) that fits into the valve body- accommodation hollow (43) that may be slide in the direction of the axis (43a) of the valve body- accommodation hollow (43). where the slider (45a) has a sliding surface (45b), a push face (45e) closing the sliding surface (45b) at one end (45c) and a rear surface (451) closing the other end (45d) of the sliding surface (45b)_s furthermore, at least one medium introduction passage (46) and at least one blow-off passage (47) formed in the material of the slider (45a) and/or in the material of the valve housing (41), where at least one sealing member (50) is inserted between the medium introduction passage (46) and the blow-off passage (47) separating the medium introduction passage (46) and the blow-off passage (47) from each other with a gas-tight seal and a feed channel (60) suitable for guiding the acceleration medium (3) to the medium introduction passage (46) and, optionally, a discharge channel (70) that may be linked to the blow-off passage (47) are established in the valve housing (41) of the operation unit (40) and/or in the slider (45a).

11. The device according to claim 10, cha acterised by that, the distance (T) between the first edge point (46a) of the first outlet opening (46c) of the medium introduction passage (46) closest to the blow-off passage (47) and the second edge point (47a) of the blow-off passage (47) closest to the medium introduction passage (46) is greater than the size of the opening (D) of the transfer passage (42) in the direction of the movement of the slider (45a).

12. The device according to claim 10 or 11, characterised by that a feed channel (60) suitable for guiding the acceleration medium (3) is arranged in the valve housing (41) opening out to the valve, body-accommodation hollow (43) of the valve housing (41), and the inlet main axis (60a) of the feed channel (60) and the axis (43a) of the valve body-accommodation hollow (43) are at an angle to each other, furthermore the longitudinal axis (42a) of the transfer passage (42) and the axis (43a) of the valve body-accommodation hollow (43) are also at an angle to each other, the first inlet opening (46b) of the medium introduction passage (46) created in the material of the slider (45a) is arranged on the fear surface and/or sliding surface of the slider (45a)₅ while the first outlet opening (46c) of the medium introduction passage (46) is arranged on the sliding surface (45 b) of the slider (45 a), in the vicinity of the first outlet opening (46c) of the medium introduction passage (46), on both sides of the first outlet opening (46c), seats (48) are indented in the sliding surface (45b) of the slider (45a) and/or running around the boundary surface (43b) of the valve body-accommodation hollow (43) of the valve housing (41) serving to receive the sealing members (50), and the sealing members (50) are fitted into the seats (48).

13. The device according to claim 12, characterised by that a feed channel (60) suitable for guiding the acceleration medium (3) is arranged in the continuation of the valve body- accommodation hollow (43) of the valve housing (41), parallel to the axis (43a) of the valve body- accommodation hollow (43), preferably coaxially with it in the valve housing (41), opening out to its external side (41a).

14. The device according to claim 10 or 1 1, characterised by that a feed channel (60) suitable for guiding the acceleration medium (3) is established on the rear surface (45f) of the slider (45a), and is connected to the first inlet opening (46b) of the medium introduction passage (46) created in the material of the slider (45a), furthermore, the inlet main axis (60a) of the feed channel (60) and the axis (43a) of the valve body-accommodation hollow (43) are coaxial with each other, while the longitudinal axis (42a) of the transfer passage (42) and the axis (43a) of the valve body- accommodation hollow (43) are at an angle to each other, and the first outlet opening (46c) of the medium introduction passage (46) created in the material of the slider (45a) is arranged on the sliding surface (45b) of the slider (45a), in the vicinity of the first outlet opening (46c) of the medium introduction passage (46), on both sides of the first outlet opening (46c), seats (48) are indented in the sliding surface (45b) of the slider (45a) and/or running around the boundary surface (43b) of the valve body-accommodation hollow (43) of the valve housing (41) serving to receive the sealing members (50), and the sealing members (50) re fitted into the seats (48),

15. The device according to any of claims 10 to 14, characterised by that the blow-off passage (47) is formed by a recess (45g) machined into the sliding surface (45b) of die slider (45a), and a groove (49) is recessed in the sliding surface (45b) of the slider (45a) and/or in the boundary surface (43b) of the valve body-accommodation hollow (43) of the valve housing (41) in the vicinity of the end of the recess (45g) closer to the first outlet opening (46c) of the medium introduction passage

(46) serving for receiving one or more sealing members (50), and the sealing members (50) are fitted into the groove (49).

16. The device according to any of claims 10 to 14, characterised by that the blow-off passage

(47) is a transfer channel (47b) made in and passing through the material of the slider (45a) and the second inlet opening (47c) and second outlet opening (47d) of the blow-off passage (47) are arranged on the sliding surface (45b) of the slider (45a), and a groove (49) is recessed in the sliding surface (45b) of the slider (45a) and/or in the boundary surface (43b) of the valve body- accommodation hollow (43) of the valve housing (41) in the vicinity of the end of the second inlet opening (47c) of the blow-off passage (47) closer to the first outlet opening (46c) of the medium introduction passage (46) serving for receiving one or more sealing members (50), and the sealing members (50) are fitted into the groove (49).

17. The device according to claim 15 or 16, characterised by that the space (L) between the sealing member (50) located in the vicinity of the first outlet opening (46c) of the medium introduction passage (46) and closer to the blow-off passage (47), and the sealing member (50) located on the side of the biow-off passage (47) towards the first outlet opening (46c) of the medium introduction passage (46) is greater than the size (D) of the opening of the transfer passage (42) measured in the direction of movement of the slider (45a),

18. The device according to any of claims 10 to 17, characterised by that the discharge channel (70) is established at the end (43c) of the valve body-accommodation hollow (43) opening out on the external side (41a) of the valve housing (41) in the vicinity of the external side (41a) of the valve housing (41), opposite to the feed channel (60).

19. The device according to any of claims 10 to 18, characterised by that a return member (80) is inserted between the valve housing (41) and the slider (45a), and the slider (45a) is forced into its basic state in this way, and with the slider (45a) in its basic state the first outlet opening (46c) of the medium introduction passage (46) opens out into the transfer passage (42) connected with a gas- tight connection, to the channel (26) of the separation part-unit (20) located in the acceleration housing (10) of the valve body (45) of the operation unit (40).

20. The device according to claim 19, characterised by thai the return member (80) is a coil spring located in the vicinity of the one end (45c) of the sliding surface (45b) of the slider (45a) towards the push face (45e), between the push face (45e) and the valve housing (41).

21. Device for propelling a material charge using a gas-phase medium under pressure, which comprises a charge chamber (11) for accommodating the material charge (2), an acceleration housing (10) containing an acceleration medium chamber (12) serving for the temporary storage of the acceleration medium (3) suitable for propelling the material charge (2), and a separation part- unit (20) inserted between the charge chamber (11) and the acceleration medium chamber (12), where the separation part-unit (20) has a mouth (24) linking the acceleration medium chamber (12) and the charge chamber (11) to each other and which can be sealed by the sealing body (30), an equalizer chamber (22a) and a channel (26) serving for guiding the acceleration medium (3) into the equalizer chamber (22a), and the channel (26) is connected to an operation unit (40) containing a valve housing (41) and a valve body (45) cooperating with it, characterised by that the valve housing (41) of the operation unit (40) has a transfer passage (42) that may be linked with a gas- tight seal to the channel (26) of the separation part-unit (20) located in the acceleration housing (10), and a valve body-accommodation hollow (43) with an axis (43a) intersecting the longitudinal axis (42a) of the transfer passage (42), which opens on the external side (41a) of the valve housing (41), the valve body (45) is established as a sealing piece (45h) fitted into the valve body- accommodation hollow (43) that may be rotated around an axis of rotation (451) at an angle (β) to the axis (43a) of the valve body-accommodation hollow (43), where the sealing piece (45h) has a connection passage (45k) passing through it, the connection passage (45k) has a first opening (451) and a second opening (45n) opening out to the surface (45j) of the sealing piece (45h), the first axis (45m) of the first opening (451) and the second axis (45o) of the second opening (45n) are at an angle of inclination (γ) to each of 30-150°, the val ve body-accommodation hollow (43) is connected to the feed channel (60) on the one side of the sealing piece (45h) suitable for guiding the acceleration medium (3) to the connection passage (451c), while the valve body-accommodation hollow (43) is also connected to the discharge channel (70) on the other side of the sealing piece (45h) that can be made to be connected to the connection passage (45k), and the feed channel (60) and the discharge channel (70) are isolated from each other with a gas-tight seal.

22, Device according to claim 21, characterised by that the feed channel (60) and the discharge channel (70) are isolated from each with a gas-tight seal by sealing members (50) arranged in the valve body-accommodation hollow (43) of the valve housing (41) and/or in the surface (45j) of the sealing piece (45h),