WO2023191662A1

WO2023191662A1 - Concealed fire extinguishing sprinkler

Info

Publication number: WO2023191662A1
Application number: PCT/RU2023/050059
Authority: WO
Inventors: Андрей Александрович КУПФЕР; Норайр Сергеевич МАРТИРОСЯН
Original assignee: Общество С Ограниченной Ответственностью "Фогстрим"
Priority date: 2022-03-26
Filing date: 2023-03-24
Publication date: 2023-10-05

Abstract

The invention relates generally to fire-fighting equipment for use in automatic high-pressure fire extinguishing systems, and more particularly to a sprinkler for supplying a fire extinguishing fluid (in particular water) in the form of a finely dispersed flow, said sprinkler being designed for concealed installation in interiors, for example behind the surface of a decorative ceiling or wall. An extendable device consists of a telescopic fitting connected to a high-pressure fire extinguishing system, and a sprinkler mounted to said telescopic fitting by means of a nipple. To allow automatic activation when a threshold temperature is reached, the sprinkler is provided with an automatic thermal lock. The claimed technical solution allows reliable automatic activation of the sprinkler, and specifically allows more reliable extension of the sprinkler.

Description

SPRINKLER FOR HIDDEN MOUNTING FIRE FIGHTING SYSTEMS

Field of technology

The claimed technical solution generally relates to fire-fighting equipment used as part of automatic high-pressure fire extinguishing systems and, in particular, to a sprinkler for supplying fire extinguishing liquid (in particular water) in the form of a finely sprayed stream, designed for hidden installation in premises, for example, behind the plane of the decorative ceiling of the room, or behind the plane of the decorative wall of the room.

State of the art

There are many hidden sprinklers known from the prior art, which are automatic sprinklers with a heat-sensitive destructible bulb (low-fusible insert) for quick response and hidden installation. The famous sprinklers are recessed into the ceiling and hidden by a flat cover. The cover is attached to the sprinkler body using solder with a melting point of 57, 74 or 100 °C. During a fire, as the temperature in the ceiling area rises, the solder holding the lid in place melts. The lid is released, the temperature causes the liquid in the glass flask to expand (the fusible insert melts), as a result of which the flask (the fusible insert) collapses and releases the locking device spring. Water flows from the hole to the sprinkler outlet, which sprays water, localizing or eliminating the fire.

A hidden sprinkler is also known from the prior art. (US 9931528B2, publ. 04/03/2018). Concealed side wall sprinkler in unactivated and activated states. The concealed sprinkler includes a body having a proximal portion and a distal portion. The distal part includes an annular wall forming a chamber and an opening communicating with the chamber. The deflector assembly is located inside the chamber. A trigger assembly having a lever assembly interacting with an inner surface of the annular wall supports the deflector assembly in a first position, the trigger assembly includes a thermally resistant plate assembly having a protruding portion substantially delimiting and covering the opening and chamber.

A hidden horizontal sprinkler is also known from the prior art. (US 10940347 B2, publ. 03/09/2021). A flush-mounted sprinkler includes a sprinkler body having a through channel with an inlet end and an outlet end; a shut-off device attached to the outlet end of the flow channel using a trigger mechanism that responds to heat; a deflector assembly including a deflector plate and a button attached to the upstream side of the deflector plate, wherein said deflector assembly is movably supported on the sprinkler body by at least one arm, wherein said button defines an opening that extends unobstructed through the button from the upstream side to downstream side, said button including a flange portion that is secured to an opening in the baffle plate, and the opening extends through the flange portion.

Also known from the prior art is a retractable telescopic fire sprinkler (US6808128, published 10/26/2004). Famous retractable telescopic automatic fire sprinkler. In a dry system, the sprinkler is pulled into position by system pressure in response to a pre-action signal. When the system pressure is released, for example after completing a test, the sprinkler automatically returns to its original position.

The essence of the invention

The problem solved by the stated group of inventions is the creation of a sprinkler intended for hidden installation in premises, namely the creation of a reliable mechanism that ensures smooth extension of the sprinkler.

The technical result of the claimed group of inventions is to increase the reliability of automatic operation of the sprinkler, in particular, to increase the reliability of operation and extension of the sprinkler. The technical result is achieved due to the fact that the telescopic device for sprinklers of a fire extinguishing system contains a cylindrical hollow body, on one side to which a nipple is attached, and on the other side, a hollow fitting and a piston are inserted into the body, while the cylindrical hollow body is made with the possibility of axial movement on the said hollow fitting, and the piston is connected to the hollow fitting, and the said piston is made with through holes made in the side wall around the circumference of the piston, while a toroidal groove is made on the inner surface of the cylindrical body, and in the mentioned through holes of the piston and partially in the toroidal Locking balls are installed in the bore of the body, while a plunger is installed inside the piston, configured to press said locking balls through the through holes of the piston to the toroidal bore of the body, while the plunger is pressed inside the piston by a spring installed between said plunger and said nipple, in the nipple, plunger and The fitting has through axial holes forming a channel for the fire extinguishing liquid, while the through axial hole made in the nipple is hermetically sealed with a rod.

In a particular case of implementation of the claimed technical solution, the said rod is pressed into the nipple hole by means of an automatic thermal lock installed in the sprinkler.

In a particular case of implementation of the claimed technical solution, the device is connected to a sprinkler via a nipple.

In a particular case of implementation of the claimed technical solution, the hollow fitting is rigidly connected to the pipes of the high-pressure fire extinguishing system.

In a particular case of implementation of the claimed technical solution, the fire extinguishing system is a high-pressure fire extinguishing system.

In a particular case of implementation of the claimed technical solution, the device is made with the ability to extend by 25 - 30 mm when triggered.

The technical result is also achieved due to the fact that the sprinkler of the fire extinguishing system includes a telescopic device containing a cylindrical hollow body, on one side to which a nipple is attached, and on the other side, a hollow fitting and a piston are inserted into the body, while the cylindrical hollow body is configured to axial movement on said hollow fitting, and the piston is connected to a hollow fitting, and the said piston is made with through holes made in the side wall along the circumference of the piston, while a toroidal groove is made on the inner surface of the cylindrical body, and in the mentioned through holes of the piston and partially in the toroidal groove of the body, locking balls are installed, with In this case, a plunger is installed inside the piston, made with the ability to press the mentioned locking balls through the through holes of the piston to the toroidal bore of the body, while the plunger is pressed inside the piston by a spring installed between the said plunger and the mentioned nipple, wherein the nipple, plunger and fitting have through axial holes forming a fire extinguishing fluid channel, wherein the through axial hole made in the nipple is hermetically sealed with a rod; and a sprinkler mounted on said telescopic device, wherein the sprinkler is equipped with an automatic thermal lock.

In a particular case of implementing the claimed technical solution, the sprinkler contains a hollow cylindrical body made with an internal working chamber, and with nozzles made in the form of through channels and connected to the internal working chamber,

In a particular case of implementing the claimed technical solution, the sprinkler is made with at least two rows of nozzles, designed to form an external and internal finely atomized dynamic flow of fire extinguishing liquid.

In a particular case of implementation of the claimed technical solution, the mentioned nozzles are made in the form of an outlet truncated cone.

In a particular case of implementing the claimed technical solution, the automatic thermal lock is made in the form of a glass heat-sensitive flask.

Brief description of drawings

Details, features, and advantages of the present invention follow from the following description of embodiments of the claimed technical solution using the drawings, which show:

Figure 1 is a sketch view of a retractable device for sprinklers of a concealed fire extinguishing system with separated components (explosion diagram); Figure 2 is a general view of a retractable device for sprinklers of a concealed fire extinguishing system;

Figure 3 shows an example of installing a sprinkler behind the plane of a decorative ceiling on a retractable device for sprinklers of a fire extinguishing system: a) in standby condition; b) in activated/working condition;

Figure 4 shows a sprinkler;

Figure 5 is a general cross-sectional view of a sprinkler installed on a retractable device. Standby condition;

Figure 6 is a general cross-sectional view of a sprinkler installed on a retractable device. Status in work;

Figure 7 is a general cross-sectional view of a sprinkler installed on a retractable device. Status in work;

Figure 8 is a general cross-sectional view of a sprinkler installed on a retractable device, showing the passage of fire extinguishing liquid in operating mode.

In the figures, the following structural elements are indicated by numbers:

1 - hollow fitting; 2 - fitting body; 3 - piston; 4 - plunger; 5 - locking balls; 6 - spring; 7 - sealing ring; 8 - nipple; 9 - sprinkler body; 10 - sprinkler rod; 11 - heat-sensitive flask; 12 - decorative element; 13 - plane of the wall or ceiling; 14 - telescopic fitting; 15 - sprinkler; 16 - through holes of the piston; 17 - toroidal groove; 18 - channel for fire extinguishing liquid; 19 - through hole of the nipple; 20 - bracket; 21 - arched racks; 22 - working chamber of the sprinkler; 23 - sprinkler nozzles; 24 - through hole in the end part of the sprinkler body; 25 - above-piston space; 26 - under-piston space; 27 - sealing ring; 28 - sealing ring; 29 - sealing rings;

Disclosure of the Invention

The technical solution relates to retractable devices for sprinklers of concealed fire extinguishing systems, such as spray nozzles for high pressure fire extinguishing systems, designed for concealed installation in rooms, for example, behind the plane (13) of the decorative ceiling of the room, or behind the plane of the decorative wall of the room or other finishing elements. In this case, the spray nozzle of this type is hidden from the view of the average person by means of a decorative element (12). The decorative element (12) must be perforated for better heat exchange with the indoor air. An example of such an installation is shown in Fig.3.

The claimed device is made with the ability to extend the sprinkler beyond the plane of the decorative wall of the room or other finishing elements to the required length, approximately 25 - 30 mm of the sprinkler when it is activated. At the same time, the sprinkler is designed to automatically operate when the temperature inside the room increases and ensure the spraying of an extremely stable finely atomized stream with an even distribution over the entire protected irrigation area.

The high-pressure telescopic sprinkler consists of a telescopic fitting (14) connected to the high-pressure fire extinguishing system and a sprinkler (15) installed by means of a nipple (8) on said telescopic fitting (14). To ensure automatic operation when the maximum temperature is reached, the sprinkler (15) is equipped with a thermal lock for automatic operation.

The telescopic fitting (14) consists of a cylindrical hollow body (2), while, on the one hand, a nipple (8) is attached to the said fitting body (2), to which a sprinkler (15) is in turn attached.

In an embodiment of the claimed technical solution, the sprinkler (15) is connected to the nipple (8), and in turn, the nipple (8) is connected to the cylindrical hollow body (2) of the telescopic fitting (14) via a threaded connection. In this case, on the other hand, a hollow fitting (1) is inserted into the housing. In this case, the cylindrical hollow body (2) of the fitting is made with the possibility of axial movement on the said hollow fitting (1).

The hollow fitting (1), on one side, is made with a threaded connection, by means of which it is rigidly connected to a threaded connection made on the pipes of the high-pressure fire extinguishing system, thus the said telescopic fitting (14) is rigidly connected to the pipes of the fire extinguishing system high pressure. On the other hand, the hollow fitting (1) is connected to the piston (3), also installed in the fitting body (2).

Said piston is made with through holes (16), wherein said through holes (16) are made in the side wall along the circumference of the piston. In this case, on the inner surface of the cylindrical body (2) of the fitting, a toroidal groove (17) is made for the locking balls (5). Locking balls (5) are located in the mentioned through holes of the piston (16) and are partially inserted into the toroidal groove (17) of the fitting body (2), thereby stopping the axial movement of the piston (3) relative to the body (2).

Also installed inside the piston is a plunger (4) that presses said locking balls (5) through said through holes (16) of the piston (3) to the toroidal groove (17) of the fitting body (2). The plunger (4) as well as the fitting (1) are made hollow to form, together with the cavity of the fitting (1), a channel (18) for the passage of fire extinguishing liquid. The plunger (4) is pressed inside the piston (3) by a spring (6) installed between the said plunger (4) and the nipple (8). The nipple (8) in turn is connected to the body (2) of the telescopic fitting (14). In this case, the sprinkler (15) is connected to the other side of the nipple (8). The nipple (8) has a through cylindrical hole (19), which is a continuation of the channel (18) for the fire extinguishing liquid, formed by the cavities of the plunger (4) and fitting (1).

In the standby position, this mentioned channel (18), formed by the cavities of the plunger (4) of the fitting (1) and the through hole (19) of the nipple (8), is closed for the passage of the fire extinguishing liquid by the rod (10), hermetically installed in the mentioned through hole (19) , made in the nipple. In this case, the said rod (10) is pressed into the through hole (19) of the nipple (8) by means of an automatic thermal lock installed in the sprinkler.

In an embodiment of the technical solution, the automatic thermal lock is made in the form of a glass thermosensitive flask (1 1 ), designed to be destroyed when the ambient temperature rises due to the boiling of the liquid located inside the said flask (1 1 ). In an embodiment of the technical solution, a bracket (20) is made on the end surface of the body (9) of the sprinkler sprinkler, consisting of three arc-shaped posts (21) mated at the bottom point, made as one piece. The joint between the posts is intended for installation of the lower supporting surface of the glass thermosensitive flask (1 1).

The sprinkler (15) of the fire extinguishing system in the embodiment of the claimed technical solution consists of a cylindrical body (9) with an internal working chamber (22). The internal working chamber (22) is connected to the fire extinguishing fluid supply channel (18) of the fire extinguishing system, formed by the cavities of the plunger (4) of the fitting (1) and the through hole (19) of the nipple (8).

The body (9) of the sprinkler contains nozzles (23). Each nozzle (23) is made in the form of a through channel from the outer surface of the housing (9) to the inner working chamber (22). In an embodiment of the claimed technical solution, the mentioned nozzles (23) are made in the form of an outlet truncated cone, expanding towards the outer surface of the housing (9). The shape of the nozzles (23) in the form of a truncated cone provides a structure for the distribution of a finely atomized flow with guaranteed overlap of the irrigation area with neighboring flows, eliminating the effect of “dry” zones. Making a through channel along the path of the fire extinguishing liquid released under high pressure into a conical expanding neck makes it possible to give the finely atomized flow a shape and profile that provides a uniform, evenly distributed irrigation pattern.

The heat-sensitive flask (1 1 ) communicates with the rod (10) through a hole (24) made in the end part of the body (9) of the sprinkler (15). In the standby position, the rod (10) is installed in the hole of the nipple (8) in such a way that it closes the passage from the channel (18) of the fire extinguishing liquid to the internal working chamber (22) of the sprinkler (15), and, consequently, to the nozzles (23).

To ensure the tightness of the device in the standby position, when the device is under pressure from the fire extinguishing liquid, the device contains sealing rings (7, 27). Also, by changing the area of the sealing rings (7, 27), depending on the pressure in the system, you can change the force of extension of the fitting (14). O-rings (7) are installed between the housing (2) fitting (14) and hollow fitting (1), and O-rings (27) are also between the body (2) of the fitting (14) and the nipple (8).

In addition, the device additionally contains an o-ring (28) also installed between the nipple (8) and the sprinkler body (9).

The device also additionally contains sealing rings (29) installed on the rod (10), while one ring (29) is installed on the rod (10) and seals the through hole (19) of the nipple (8) in the standby position of the device, and the second sealing ring ( 29) is installed on the opposite side of the rod (10) and seals the hole (24) in the end part of the sprinkler body at the moment the device is activated.

In the standby position, the claimed device is under pressure from the fire extinguishing liquid, while there is no flow of fire extinguishing liquid, and the sprinkler (15) is in the closed position. The plunger (4) is pressed by a spring (6) and locks the locking balls (5) in the toroidal groove (17) of the body (2) of the fitting (14).

In the event of a fire, the glass thermosensitive flask (1 1) heats up and, due to the boiling of the liquid placed in it, breaks, and the rod (10) is released, which moves forward and opens the channel (18), namely the rod comes out of the through hole (19), made in the nipple (8), and thereby opens the passage of the fire extinguishing liquid to the internal working chamber (22) and, accordingly, to the nozzles (23), while through the mentioned channel (18), formed in the nipple, plunger and fitting, a stream of fire extinguishing liquid is formed. In this case, the rod (10) hermetically closes the through hole (24) in the end part of the body (9) of the sprinkler (15). To improve the tightness of closing the hole (24) with the said rod (10), a sealing ring (7) is additionally installed on the rod.

The hydrodynamic resistance of the cavity of the plunger (4) causes a pressure difference above the plunger (4) and below it, thereby moving it down, overcoming the resistance of the spring (6).

The locking balls (5) are released from the groove (17) and move inside the piston, giving freedom of movement of the body (2) relative to the piston (3).

The presence of pressure inside the fitting (14) forces it to work like a hydraulic cylinder, moving the fitting body (2) until it stops against the piston (3). A small gap about 0.2 mm. between the body (2) and the piston (3) it works as a hydraulic shock absorber throttle, bypassing the fire extinguishing liquid from the above-piston space (25) into the under-piston space (26), thus preventing shock extension of the fitting (14).

The extension force of the fitting (14) is determined by the pressure in the system and the seal area (7). At a system pressure of up to 100 bar, a force of up to 1.5 kilonewtons develops, which makes it possible to confidently destroy any decorative element (12) covering the sprinkler (15).

Claims

Claim

1 . A retractable device for sprinklers of a hidden-mount fire extinguishing system, containing a cylindrical hollow body, on one side to which a nipple is attached, and on the other side a hollow fitting and a piston are inserted into the body, while the cylindrical hollow body is made capable of axial movement on said hollow fitting, and the piston is connected to a hollow fitting, and the said piston is made with through holes made in the side wall along the circumference of the piston, while a toroidal groove is made on the inner surface of the cylindrical body, and in the mentioned through holes of the piston and partially in the toroidal groove of the body, locking balls are installed, with In this case, a plunger is installed inside the piston, configured to press said locking balls through the through holes of the piston to the toroidal bore of the body, while the plunger is pressed inside the piston by a spring installed between said plunger and said nipple, and through axial holes are made in the nipple, plunger and fitting, forming a channel of fire extinguishing liquid, while the through axial hole made in the nipple is hermetically sealed with a rod.

2. The device according to claim 1, characterized in that the hollow fitting is designed to be rigidly connected to the pipes of the fire extinguishing system.

3. The device according to claim 1, characterized in that it is designed to extend by 25-30 mm when triggered.

4. A fire extinguishing system sprinkler, including a retractable device for fire extinguishing system sprinklers, made according to claim 1, and a sprinkler installed on said retractable device, wherein the sprinkler is equipped with an automatic thermal lock.

5. The sprinkler according to claim 4, characterized in that the said rod is pressed into the nipple hole by means of an automatic thermal lock installed in the sprinkler sprinkler.

6. Sprinkler according to claim 4, characterized in that said retractable device is connected to the sprinkler sprinkler via a nipple.

7. The sprinkler according to claim 4, characterized in that the sprinkler contains a hollow cylindrical body made with an internal working chamber and nozzles made in the form of through channels and connected to the internal working chamber.

8. The sprinkler according to claim 4, characterized in that the sprinkler is made with at least two rows of nozzles configured to form an external and internal finely atomized dynamic flow of fire extinguishing liquid.

9. Sprinkler according to any one of claims 7, 8, characterized in that said nozzles are made in the form of an outlet truncated cone.

10. Sprinkler according to claim 4, characterized in that the automatic thermal lock is made in the form of a glass heat-sensitive flask.