The claimed invention relates to technical equipment for fire-fighting, namely to an element of gaseous fire extinguishing systems for fire suppression in premises of various purposes. The sprinkler is the device for discharge and distribution of a gaseous fire extinguishing agent in a to-be-protected room space.

An analogue of the claimed invention is the discharge sprinkler head mounted on the distribution pipeline of the automatic fire suppression system, containing the valve and the frangible bulb, characterized in that for putting the sprinkler into operation both as a result of temperature rise or overpressure in the distributive pipeline the hollow sleeve is secured on the discharge end of the sprinkler by means of the brackets, inside which there is the cap with the valve pressed to the sprinkler by the spring, the opposite end of which is supported by the rod with the frangible bulb (USSR Patent of Invention Nº 184625, dated of July 21, 1866).

A disadvantage of the said device is that it is made as an integral part from workpiece, herein a spring wrapped around the rod loses original inflexibility affecting long-term, delayed and incomplete opening of an outlet port for fire agent discharge and reducing fire suppression efficiency.

The prototype of the claimed technical decision is DESIGN OF THE SPRINKLER WITH FIRE EXTINGUISHER FOR FIRE SUPPRESSION. The design of the sprinkler for fast fire distribution disposal due to effective early fire suppression. The sprinkler design consists of: the sprinkler base (10) with the connecting block (11) above which the fire extinguisher (8) is installed, and a spray block (14) is placed in its lower part for dispersion of water or fire extinguishing agent from the pipe (12); and a cover (20) with metal snug which blocks nozzles and a block sheet (22); block heat conductivity (30) which includes radiation of plates (35a, 35b) and auxiliary radiation of a plate to improve heat conductivity (Korea Patent of Invention Nº KR101321825 (B1), publication date October 23, 2013).

A disadvantage of the said device is the large-sized fire extinguisher excluding an opportunity of concealed installation of the device in the premises with false ceilings or technical ceiling voids. The cover makes necessary its removal by the user in case of fire, which is also disadvantage reducing fire suppression efficiency.

Technical result of the claimed invention is the achievement of high fire suppression efficiency due to uniform distribution of the gaseous fire extinguishing agent in the room space under air compressed pressure in the pipeline, and the ready-to-work products discharge gas fire extinguishing agent in a protected area, and also an opportunity of concealed installation of the device in the premises with false ceilings or technical ceiling voids.

The said technical result is achieved due to the concealed extending sprinkler for gaseous fire suppression systems (Variant 1), mounted on the distributive pipe of the gas fire suppression system and consisting of the case with discharge outlets and a cover. Thus the nipple rod is installed in the sprinkler case, a groove in the nozzle case and in the nipple rod case is provided for O-ring sealing, the nipple rod is of variable outer diameter, on the one side a rod is tapered and ended with a connection thread, on the other side it is extended, wherein in its turn the case has the opening of variable diameter providing moving a nipple rod inside the case, the sprinkler case is extended outside, a cover is secured to the sprinkler case, connection tightness between the cover and the sprinkler case is provided by a sealing gasket.

The concealed extending sprinkler for gaseous fire suppression systems (Variant 2), mounted on the distributive pipe of the gas fire suppression system and consisting of the case with discharge nozzles and a cover. Thus the nipple rod is installed in the sprinkler case, a groove in the nozzle case and in the nipple rod case is provided for O-ring sealing, the nipple rod is of variable outer diameter, on the one side a rod is tapered and ended with a connection thread, on the other side it is extended, wherein in its turn the case has the opening of variable diameter for moving a nipple rod inside the case, a cover is secured to the sprinkler case for closing the nipple rod in the sprinkler case, thread in the cover is provided for connection to the distributive pipe of the gaseous fire suppression system, a protective cap is secured to the sprinkler case from opposite side, a sprinkler is secured to the connection thread of a nipple rod.

The invention is explained by drawings.

• Fig.1 - main sectional view of the invention (variant 1) in closed (duty) position.
• Fig.2 - main sectional view of the invention (variant 1) in extended (working) position.
• Fig.3 - main sectional view of the invention (variant 2) in closed (duty) position.
• Fig.4 - main sectional view of the invention (variant 2) in extended (working) position.

The claimed invention (Variant 1, Figs. 1, 2) includes the sprinkler case 2 in which the nipple rod 1 is installed. A groove for sealing O-ring 5 is in the sprinkler case 2 and in the nipple rod case 1. The sealing O-rings provide tightness and joint mobility the rod and the case relative to each other. The nipple rod is of variable outer diameter. On the one side a rod is tapered and ended with a connection thread, on the other side it is extended that allows it to be blocked when moving to limit position. Wherein in its turn the case has the opening of variable diameter providing moving a nipple rod inside the case. The sprinkler case has external case widening with the drilled outlets. A cover 3 is secured to the sprinkler case, connection tightness between the cover and the sprinkler case is provided by a sealing gasket 4.

The device operates as follows.

The sprinkler in closed position is secured to the distributive pipe by means of connection thread on the nipple rod 1. In this position the nipple rod 1 is in end bottom position in the sprinkler case 2 and rests against the cover 3. Wherein the rod is kept in the closed position by means of the two sealing O-rings 6. The nipple in closed (duty) position blocks outlets of the sprinkler, creating hermetically sealed space. When the gaseous fire suppression system starts overpressure is generated in the distributive pipeline volume. Pressure rise inside the sprinkler results to moving the case 2 along the nipple rod 1 in lower limit position. Thus the sprinkler proceeds from closed (duty) position to extended (working) position. The sprinkler is pulled out from ceiling voids into the main room space and sprays gas fire extinguishing agent.

The claimed invention (Variant 2, Figs. 3, 4) includes the sprinkler case 2 in which the nipple rod 1 is installed. A groove for sealing O-ring 6 is in the sprinkler case 2 and in the nipple rod case 1. The sealing O-rings provide tightness and joint mobility the rod and the case relative to each other. The nipple rod is of variable outer diameter. On the one side a rod is tapered and ended with a connection thread, on the other side it is extended that allows it to be blocked when moving to limit position. In its turn the case 2 has the opening of variable diameter for moving a nipple rod inside the case. A cover 3 is secured to the sprinkler case for closing the nipple rod in the sprinkler case. Thread in the cover 3 is provided for connection to the distributive pipe of the gas fire suppression system. A protective case 4 is secured to the sprinkler case from opposite side. A sprinkler tip 5 is secured to the connection thread of the nipple rod 1.

The claimed device operates as follows.

The sprinkler in closed position is secured to the distributive pipe by means of connection thread on the cover 3. In this position the nipple rod 1 is in top limit position in the sprinkler case 2 and rests against the cover 3. Wherein the rod is kept in the closed position by means of the two sealing O-rings 6. The protective cap 4 in closed (duty) position blocks outlets of the sprinkler 5, creating hermetically sealed space. When the gas fire suppression system starts overpressure is generated in the distributive pipeline volume. Pressure rise inside the sprinkler results to moving the nipple rod 1 inside the case to lower limit position. Thus the sprinkler proceeds from closed (duty) position to extended (working) position. The sprinkler is pulled out from ceiling voids into the main room space and sprays gas fire extinguishing agent.

Thus the analysis results and data of the prototype model tests confirm the said technical result of the claimed invention: achievement of high fire suppression efficiency due to uniform distribution of gas fire extinguishing agent in the room space under air compressed pressure in the pipeline, and the ready-to-work products spray gas fire extinguishing agent in a protected area, and also an opportunity of concealed installation of the device in the premises with false ceilings or technical ceiling voids.

Design of the products provides flexible sealed connection for extending the nipple rod from the sprinkler case, wherein the case operates as the guide for extending the nipple and as the retainer in limit working positions of the sprinkler.

The present invention allows to install the fire suppression systems in the museums, picture galleries and other cultural objects with high requirements to the interior of premises. This invention also allows to hide the fact that the premise is protected with the fire suppression system from outsiders and external persons.

The concealed extended sprinklers for the gas fire suppression systems can be applied simultaneously with each other (Variant 1 with Variant 2).

The claimed invention is new as all set of cumulative features is unknown from previous technical level mentioned in corresponding section of the description.

The claimed technical decision is of inventive level as for the person of skill in the art it do not follow from the prior art clearly.

It is industrially applicable in relation to fire-fighting technical equipment, namely to an element of the gas fire extinguishing systems for fire suppression in the miscellaneous premises.