RU2789329C1 - Retractable device for irrigators of the flush-mounted fire extinguishing system and irrigator of the fire extinguishing system - Google Patents

Abstract

FIELD: fire-fighting equipment.

SUBSTANCE: invention generally relates to fire-fighting equipment used as part of automatic high-pressure fire extinguishing systems and, in particular, to a irrigator for supplying extinguishing liquid (in particular water) in the form of a thinly sprayed stream, made with the possibility of concealed installation in rooms, for example, behind the plane of the decorative ceiling of the room, or behind the plane of the decorative wall of the room. The retractable device consists of a telescopic fitting connected to a high-pressure fire extinguishing system and a sprinkler irrigator installed by means of a nipple on the mentioned telescopic fitting. The irrigator is equipped with a thermal lock to ensure automatic operation when the limit temperature is reached.

EFFECT: invention ensure the reliability of the automatic operation of the sprinkler, namely, it allows to increase the reliability of the movement of the irrigator.

10 cl, 8 dwg

Description

Technical field

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 mist stream, made with the possibility of hidden installation in rooms, 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

The prior art knows a lot of hidden sprinklers, which are automatic sprinklers with a temperature-sensitive destructible flask (fusible insert) of quick response and hidden installation. Known sprinklers are recessed into the ceiling and hidden by a flat cover. The cover is attached to the body of the sprinkler using solder with a melting point of 57, 74 or 100°C. In a fire, as the temperature rises in the ceiling area, the solder holding the cover melts. The lid is released, the temperature causes the liquid in the glass bulb to expand (fusible insert melts), causing the bulb (fusible insert) to collapse and release the locking spring. Water flows from the hole to the sprinkler outlet, which sprays water, localizing or eliminating the fire.

The prior art also known hidden sprinkler. (US 9931528 B2, published 04/03/2018). Concealed sprinkler in the side wall, in the non-activated and activated state. The hidden sprinkler includes a body having a proximal part and a distal part. 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. The trigger assembly, having a lever assembly interacting with the inner surface of the annular wall, maintains the deflector assembly in the first position, the trigger assembly includes a heat resistant plate assembly having a protruding portion substantially limiting and closing the opening and chamber.

The prior art also known hidden horizontal sprinkler. (US 10940347 B2, published 03/09/2021). Flush-mounted sprinkler includes a sprinkler body having a through channel with an inlet end and an outlet end;

a locking device secured to the outlet end of the flow channel by a heat trigger; a deflector assembly including a deflector plate and a button attached to the inlet side of the deflector plate, said deflector assembly being movably supported on the sprinkler body by at least one arm, said button forming an opening that passes through the button unhindered from the upstream side to the downstream side, said button including a flange part which is fixed in a hole in the deflector plate, and the hole extends through the flange part.

Also known from the prior art is a retractable telescopic fire extinguishing sprinkler (US6808128, publ. 26.10.2004). Famous retractable telescopic automatic fire extinguishing sprinkler. In a dry system, the sprinkler is extended to the operating position by system pressure, which is applied in response to a pre-action signal. When the pressure in the system is released, for example after a test is completed, the sprinkler automatically returns to its original position.

The essence of the invention

The task solved by the claimed group of inventions is the creation of a sprinkler designed for hidden installation in rooms, namely the creation of a reliable mechanism that ensures the smooth extension of the sprinkler.

The technical result of the claimed group of inventions is to increase the reliability of the 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 the fire extinguishing system contains a cylindrical hollow body, on the one hand, to which a nipple is attached, and on the other hand, 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 mentioned 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 along the circumference of the piston, while on the inner surface of the cylindrical body a toroidal groove is made, moreover, in the said through holes of the piston and partially in the toroidal locking balls are installed in the housing groove, while a plunger is installed inside the piston, configured to press the said locking balls through the through holes of the piston to the toroidal groove of the housing, while the plunger is pressed inside the piston by a spring installed between the mentioned plunger and said nipple, wherein through axial holes are made in the nipple, plunger and fitting, forming a channel of the fire extinguishing liquid, while the through axial hole made in the nipple is hermetically closed by the stem.

In a particular case of the implementation of the claimed technical solution, 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 the sprinkler by means of 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 of 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 possibility of extension 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 the one hand, to which a nipple is attached, and on the other hand, a hollow fitting and a piston are inserted into the body, while the cylindrical hollow body is configured to 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 along the circumference of the piston, while on the inner surface of the cylindrical body a toroidal groove is made, moreover, in the said through holes of the piston and partially in locking balls are installed in the toroidal groove of the housing, while a plunger is installed inside the piston, configured to press the said locking balls through the through holes of the piston to the toroidal groove of the housing, while the plunger is pressed inside the piston by a spring installed between the mentioned the plunger and said nipple, wherein in the nipple, plunger and fitting, through axial holes are made, forming a channel of the fire extinguishing liquid, while the through axial hole made in the nipple is hermetically closed by the rod; and a sprinkler mounted on said telescopic device, wherein the sprinkler is provided with an automatic thermal lock.

In a particular case of the implementation of 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 implementation of the claimed technical solution, 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.

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

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

Brief description of the drawings

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

On FIG. 1 - sketch view of a retractable device for sprinklers of a flush-mounted fire extinguishing system with separated components (explosion diagram);

On FIG. 2 is a general view of a retractable device for sprinklers of a flush-mounted fire extinguishing system;

On FIG. 3 - an example of installing a sprinkler beyond the plane of the decorative ceiling on a retractable device for sprinklers of the fire extinguishing system:

a) in a state of emergency;

b) in the activated/working condition;

On FIG. 4 - sprinkler sprinkler;

On FIG. 5 is a general view of a sprinkler installed on a retractable device, in section. Standby state;

On FIG. 6 is a general view of a sprinkler mounted on a retractable device, in section. Status in work;

On FIG. 7 is a general view of a sprinkler mounted on a retractable device, in section. Status in work;

On FIG. 8 is a general view of a sprinkler installed on a retractable device, in section, showing the passage of fire extinguishing liquid in the operating mode.

The figures indicate the following structural elements:

1 - hollow fitting; 2 - fitting body; 3 - piston; 4 - plunger; 5 - locking balls; 6 - spring; 7 - sealing ring; 8 - nipple; 9 - body of the sprinkler sprinkler; 10 - sprinkler rod; 11 - thermosensitive flask; 12 - decorative element; 13 - the plane of the wall or ceiling; 14 - telescopic fitting; 15 - sprinkler 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 - over-piston space; 26 - piston space; 27 - sealing ring; 28 - sealing ring; 29 - O-rings .

Disclosure of invention

The technical solution relates to retractable devices for sprinklers of a concealed fire extinguishing system, such as spray nozzles for high pressure fire extinguishing systems, intended 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 elements finishes. In this case, this type of spray nozzle is closed from the view of the layman by means of a decorative element (12). The decorative element (12) must be perforated for better heat exchange with indoor air. An example of such a setup is shown in Fig. 3.

The claimed device is made with the possibility of extending 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 triggered. At the same time, the sprinkler is designed to automatically operate when the temperature inside the room rises and provide spraying of an extremely stable finely atomized flow with uniform distribution over the entire protected area of irrigation.

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

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

In an embodiment of the claimed technical solution, the sprinkler (15) is attached to the nipple (8), and, in turn, the nipple (8) is connected to the cylindrical hollow body (2) of the telescopic fitting (14) by means of a threaded connection. In this case, on the other hand, a hollow fitting (1) is inserted into the housing. At the same time, 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 the one hand, is made with a threaded connection, through 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 high-pressure fire extinguishing system. On the other hand, the hollow fitting (1) is connected to the piston (3) also installed in the body (2) of the fitting.

Said piston is made with through holes (16), while said through holes (16) are made in the side wall around the circumference of the piston. At the same time, a toroidal groove (17) for locking balls (5) is made on the inner surface of the cylindrical body (2) of the fitting. The locking balls (5) are located in the said through holes of the piston (16) and are partially inserted into the toroidal groove (17) of the body (2) of the fitting, thereby locking the axial movement of the piston (3) relative to the body (2).

Also, a plunger (4) is installed inside the piston, which presses the mentioned locking balls (5) through the mentioned through holes (16) of the piston (3) to the toroidal groove (17) of the body (2) of the fitting. The plunger (4) as well as the fitting (1) are made hollow to form a channel (18) together with the cavity of the fitting (1) for the passage of fire extinguishing liquid. The plunger (4) is pressed inside the piston (3) by a spring (6) installed between said plunger (4) and nipple (8). The nipple (8) is in turn connected to the body (2) of the telescopic fitting (14). In this case, the sprinkler (15) is attached to the other side of the nipple (8). In the nipple (8) there is 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 fire extinguishing liquid by the rod (10), hermetically installed in the mentioned through hole (19) made in the nipple. At the same time, said rod (10) is pressed in the through hole (19) of the nipple (8) by means of an automatic thermal lock installed in the sprinkler.

In the embodiment of the technical solution, the thermal lock of automatic operation is made in the form of a glass thermosensitive flask (11), made with the possibility of destruction when the ambient temperature rises due to the boiling of the liquid inside the said flask (11).

In the embodiment of the technical solution, on the end surface of the housing (9) of the sprinkler sprinkler, a bracket (20) is made, consisting of three arcuate racks (21) conjugated at the lower point, made at the same time. The junction of the racks is designed to install the lower supporting surface of the glass thermosensitive bulb (11).

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 inner working chamber (22) is connected to the fire extinguishing liquid 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).

Nozzles (23) are made in the body (9) of the sprinkler. 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, said 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 atomized flow with a guaranteed overlap of the irrigation area by neighboring flows, excluding the effect of "dry" zones. The execution on the way of the fire extinguishing liquid, released under high pressure, passing into the conical expanding neck of the through channel, allows you to give the finely sprayed flow a shape and profile that provides a uniform uniformly distributed pattern of irrigation.

The temperature-sensitive flask (11) communicates with the rod (10) through the 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 of 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, it is possible to change the pull-out force of the fitting (14). The sealing rings (7) are installed between the body (2) of the fitting (14) and the hollow fitting (1), and the sealing rings (27) are also installed between the body (2) of the fitting (14) and the nipple (8).

In addition, the device additionally contains a sealing ring (28) also installed between the nipple (8) and the body (9) of the sprinkler.

Also, the device additionally contains sealing rings (29) installed on the stem (10), while one ring (29) is installed on the stem (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 stem (10) and seals the hole (24) in the end part of the sprinkler body at the moment the device is triggered.

In the standby position, the claimed device is under the pressure of the fire extinguishing liquid, while there is no flow of the fire extinguishing liquid, and the sprinkler (15) is in the closed position. The plunger (4) is pressed by the spring (6) and blocks 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 temperature-sensitive bulb (11) heats up and, due to the boiling of the liquid placed in it, breaks, while the rod (10) is released, which performs translational movement 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 said channel (18) formed in the nipple, plunger and fitting, a fire extinguishing fluid flow. In this case, the rod (10) hermetically closes the through hole (24) in the end part of the housing (9) of the sprinkler (15). To improve the tightness of closing the hole (24) by 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 shifting it down, overcoming the resistance of the spring (6).

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

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

The pull-out force of the fitting (14) is determined by the system pressure and the sealing 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 (10)

1. A retractable device for sprinklers of a flush-mounted fire extinguishing system, containing a cylindrical hollow body, on the one hand, to which a nipple is attached, and on the other hand, 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 mentioned 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 on the inner surface of the cylindrical body a toroidal groove is made, and locking balls are installed in the said through holes of the piston and partially in the toroidal groove 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 groove of the body, while the plunger is pressed inside the piston by a spring installed between said plunger and said nipple, and in the nipple e, the plunger and the fitting are made through axial holes forming a channel of the fire extinguishing liquid, while the through axial hole made in the nipple is hermetically closed by the stem. 2. The device according to claim 1, characterized in that the hollow fitting is made with the possibility of a rigid connection with the pipes of the fire extinguishing system. 3. The device according to claim 1, characterized in that it is made with the possibility of extension by 25-30 mm when triggered. 4. The sprinkler of the fire extinguishing system, including a retractable device for sprinklers of the fire extinguishing system, made according to claim 1, and a sprinkler sprinkler installed on the said retractable device, while the sprinkler sprinkler is equipped with an automatic thermal lock. 5. Sprinkler according to claim 4, characterized in that 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 by means of a nipple. 7. Sprinkler according to claim 4, characterized in that the sprinkler 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. 8. Sprinkler according to claim 4, characterized in that the sprinkler 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 temperature-sensitive flask.

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