WO2022066052A1

WO2022066052A1 - Mounting attachment for a drop-down deluge sprinkler

Info

Publication number: WO2022066052A1
Application number: PCT/RU2021/050288
Authority: WO
Inventors: Антон Валерьевич СЕЛЮТИН
Original assignee: Антон Валерьевич СЕЛЮТИН
Priority date: 2020-09-23
Filing date: 2021-09-04
Publication date: 2022-03-31
Also published as: RU2748089C1

Abstract

The present invention relates to the field of fire extinguishing, and more particularly to devices for spraying a fire extinguishing substance, and can be used in interiors that have high aesthetic requirements (hotel lounges, shopping centres, theatre auditoriums and the like) necessitating the concealment of sprinklers when in standby mode. The technical problem solved by the present invention is that of creating a reliable and simple mounting attachment suitable for deluge-type sprinklers, which allows said sprinklers to drop down in a rapid and timely fashion upon activation at both low and high operating pressures.

Description

Mounting point for a drop-down deluge sprinkler

The present invention relates to the field of fire extinguishing, namely, to devices designed to spray a fire extinguishing agent, and can be used in rooms with high requirements for appearance (hotel lobbies, shopping malls, theater halls, etc.), when it is necessary to hide sprinklers in standby mode.

Known mount hidden (captive) sprinkler sprinkler [JSC "PO Spetsavtomatika", Product Catalog. Electronic resource: https://sa-biysk.ru/catalog/1373/, accessed 27.08.2020, see Appendix 1], including a housing inside which a sprinkler is installed, connected on one side to the water supply pipeline, and on the other hand, it rests on a cover attached to the end of the housing. As the temperature rises in the protected room, the decorative cover that masks the sprinkler is first heated. When a certain temperature level is reached (depending on the sprinkler trigger temperature), the cover is separated from the sprinkler, thereby opening the sprinkler in the ceiling. With a further increase in the temperature in the room, the temperature-sensitive bulb of the sprinkler is triggered and water is supplied to the fire zone, extinguishing occurs.

This mount is only suitable for the installation of low pressure sprinklers, which do not fall out when triggered, but are simply hidden in the recess of the ceiling. The use of special solder to fix the lid leads to a complication in the manufacturing technology of the assembly, because it is necessary to select the solder actuation temperature depending on the sprinkler actuation temperature.

Various drop-down sprinklers are known, which are not nodes for attaching sprinklers, but independent integral structures of sprinklers.

For example, a hidden sprinkler is known (outlet down) [Fairdrop LLC, Product Catalog 2017, pp. 53-54. Electronic resource: http://fire-drop.ru/support/catalog/, date of access 02.09.2020, see Appendix 2], consisting of a housing connected to the water supply pipeline on one side, and closed with a lid on the other side held with solder. A deflector with two thermal sensors is installed inside the case, held with a latch fixed with solder. In the event of a fire, the solder holding the lid and retainer will melt, causing the lid to come off. After two thermal sensors detect a sufficient amount of heat, the deflector is set to its working position (lowering down), and water is evenly distributed throughout the entire irrigation zone.

The use of special solder for attaching the cover and latch also complicates the manufacturing technology of the sprinkler itself, since it is necessary to select the solder actuation temperature depending on the sprinkler actuation temperature. In addition, the design of the latch is made of multi-element, which complicates the technology of assembling such a sprinkler.

Also known sprinkler for living quarters [Survitec Group Limited. Electronic resource: https://survitecgroup.com/systems/nff-xflow-water-mist-solution/, date of access 09/02/2020, Appendix 3], consisting of a housing connected to the water supply pipeline on one side, and the other side is covered with a lid. From the side closed by the lid, a lock washer is screwed into the housing, the inner diameter of which is tapered towards the lid. A spray head is installed in the cavity of the body, having an elongated cylindrical shape, the diameter of which also tapers towards the cover, corresponding to the inner diameter of the lock washer. Stops are installed inside the lock washer, pressed against the inner walls of the washer with the help of a spacer between them, which is used as a thermobulb. The spray head rests on top of the stops. When the room temperature rises to the sprinkler response temperature, the thermoflask is destroyed, the stops fall down under the weight of the spray head, and the head falls out of the housing, lingering in the washer due to the narrowing of its diameter. Irrigation takes place.

The disadvantages of this sprinkler are the low reliability of the design, due to the possible unwinding of the lock washer under the impact of the head when it falls out and vibrations during operation, as well as the limitation associated with installing only the described form of the spray head inside. In addition, the complex design of the stops involves the installation of a thermal bulb in their lower part, which extends beyond the lock washer, which can lead to damage to the thermal bulb during transportation or storage.

Thus, the attachment points of drop-down deluge sprinklers are not known from the prior art. At the same time, the creation of such a unit is an urgent task, since in some fire extinguishing systems the terms of reference for their installation provide not only sprinklers under pressure, but also sprinklers that are not under pressure in the standby mode and are triggered when the control valve is switched.

Technical task

The technical problem solved by the present invention is the creation of a reliable and simple attachment that would be suitable for deluge type sprinklers and would ensure their rapid and timely dropout when triggered in both low and high working pressure conditions.

The solution of the problem

The specified technical result is achieved due to the fact that the attachment point of the drop-down deluge sprinkler includes a hollow body, at one end configured to be connected to the pipeline, and at the other end provided with a support sleeve, inside the casing there is a piston, made with the possibility of screwing the deluge sprinkler into it and moving along with it along the inner walls of the housing until it stops against the support sleeve, and the inner diameter of the support sleeve is larger than the diameter of the spray head of the sprinkler, but less than the outer diameter of the piston, the assembly is also equipped with at least one retainer configured to hold the piston together with the sprinkler in its original position.

The following options for the development of the main technical solution are possible:

- a seal is used as a retainer, installed between the outer wall of the piston and the inner wall of the housing, while the degree of sealing is selected based on the weight of the piston together with the sprinkler installed in it so that in the absence of pressure to keep them in their original position;

- a spring is located between the piston and the support sleeve;

- as a lock, two stops are used, installed in the lower part of the assembly with the ability to maintain the sprinkler screwed into the piston in its original position, in its upper part abutting against each other, having inclined outer edges that rest on the inner surface of the support sleeve, made with a corresponding slope, and a thermoflask is installed between the stops in the lower part;

- as a lock, two stops are used, installed in the lower part of the assembly with the ability to maintain the sprinkler screwed into the piston in its original position, in its upper part resting against each other, having straight outer edges that rest on the inner surface of the support sleeve, and between a thermal bulb is installed with stops in the lower part.

Positive effects of the invention

Thus, a simple and reliable design of the fastening unit is claimed, which is suitable for low and high pressure deluge sprinklers, since the sprinklers are fixed in the piston by means of a standard threaded connection for them, through which they are usually connected to the water supply pipeline, and are held in their original position thanks to the lock , and when falling out, they are fixed in the working position due to the fact that the piston rests against the support sleeve.

Figure.1

the fastening unit with a lock in the form of a seal in the initial position is presented.

Figure.2

the mounting unit with a lock in the form of a seal in the working position is presented.

Figure.3

the fastening unit with a lock in the form of a seal with a spring in the initial position is presented.

Figure.4

the fastening unit with a latch in the form of a seal with a spring in the working position is presented.

Figure.5

the fastening unit with a latch in the form of stops with inclined outer edges in the initial position is presented.

Figure.6

shows the bottom view of the node in Fig. five.

Figure.7

the fastening unit with a latch in the form of stops with inclined outer edges in the working position is presented.

Mounting point for drop-down deluge sprinkler ( , , , , , , ) includes a hollow body 1, at one end made with the possibility of attaching to the pipeline (not shown), for example, using a connecting nut 2 and a cutting ring 3, and at the other end provided with a support sleeve 4.

Inside the housing 1 there is a piston 5, made with the possibility of screwing the deluge sprinkler 6 into it and moving along with it along the inner walls of the housing 1 until it stops against the support sleeve 4. The deluge sprinkler 6 can be screwed in so that its end presses the passage channel 7 in the housing 1 for the passage of water from the pipeline when the sprinkler 6 is triggered. Also, the channel 7 can be closed with a plug 8 with seals 9 ( , ), which flies out when water is supplied to housing 1.

The support sleeve 4 is attached to the body 1, for example, by means of a threaded connection or by a tight fit and fixation with fasteners (not shown in the drawing), while the inner diameter of the support sleeve 4 is larger than the diameter of the spray head of the sprinkler 6, but less, than the outer diameter of the piston 5 to ensure that the piston 5 stops when the fill 6 falls out, but allows the spray head of the fill 5 to be outside the assembly for efficient spraying. To do this, the sleeve 4 has a variable inner diameter so that a bearing surface is formed for contact with the piston 5 to ensure its retention when the sprinkler 6 falls out. The sleeve 4 can also have an L-shaped external profile in order to hide the gaps during installation ( , , , ).

The piston 5 is a sleeve, the outer diameter of which is made such that a gap is formed between the piston 5 and the inner wall of the housing 1, which will allow the piston 5 to move freely along the walls of the housing 1, but without distortion in the housing 1. The outer diameter of the piston can be made the same (not shown in the drawing), and it is also possible to perform piston 5 with a variable outer diameter (annular protrusion on , , , , , ) to save on the material of the sleeve and reduce its weight and dimensions.

The assembly is provided with at least one latch designed to hold the piston 5 together with the sprinkler 6 in the initial position. There are various versions of the latch.

Sealant 10 ( , ) installed between the outer wall of the piston 5 and the inner wall of the housing 1, while the degree of compaction is selected based on the weight of the piston 5 together with the sprinkler 6 installed in it so as to keep them in their original (raised) position in the absence of pressure.

A spring 11 ( , ), which is designed to additionally hold the piston 5 together with the sprinkler 6 in the initial position, for example, in the presence of vibrations in the room, and also to retract the piston 5 together with the sprinkler 6 after actuation back to the original position (when the pressure is released). The degree of elasticity of the spring 11 is selected depending on the technical characteristics of the assembly (weight, degree of vibration, etc.).

In another variant, two stops 12 can be used as a retainer, installed in the lower part of the assembly with the possibility of maintaining the sprinkler 6, screwed into the piston 5, in the initial position, in their upper part abutting against each other, having inclined outer edges ( , , ), which rest on the inner surface of the support sleeve 4, made with a corresponding slope, and between the stops 12 in the lower part there is a thermobulb 13.

It is possible that the stops 12 have straight outer edges (not shown in the drawing), which rest on the inner surface of the support sleeve 4, and between the stops 12 in the lower part there is a thermal bulb 13.

In versions with stops 12, the piston 5 can also be provided with a seal 10, however, the degree of sealing in this case may be the minimum required and does not depend on weight. The spring 11 can also be present in the version with stops 12.

From the end opposite to the connection to the pipeline, the assembly can be additionally equipped with an end washer 14, which has an L-shaped profile and is designed to hide technological gaps when installing the assembly in the ceiling, as well as for additional fixation of the sleeve 4 and stops 12 (if they are availability). The washer 14 can be fixed on the sleeve 4 using a threaded connection or a tight fit and fixation with fasteners (not shown in the drawing). A decorative cover (not shown in the drawing) can be attached to the end of the sleeve 4 or washer 14 (if any), which falls off when the sprinkler 6 falls out.

The node can be equipped with at least one clamping bar 15, designed for more reliable installation of the node on the ceiling (for example, tension) and to reduce vibrations in working condition.

Housing 1 and other elements of the unit can be made of metal or polymer, depending on the specified operating conditions of the fire extinguishing system.

In the absence of stops 12, the sprinkler 6 falls out when pressure (water) is applied to it by opening the control valve of the fire extinguishing system and pushing the piston 5 through the seal 10. Since the sprinklers 6 are not under pressure in the standby mode, therefore, the latch in the form of a seal 10 securely holds the piston 5 together with the sprinkler 6 in the initial position, and when the sprinkler 6 is triggered, the cavity between the piston 5 and the upper wall of the housing 1 is filled with water (or other fire extinguishing agent) and with its pressure squeezes out the piston 5 together with the sprinkler 6 until it stops in the sleeve 4 so that the spray head of the sprinkler 6 is outside the assembly.

In the presence of stops 12, the sprinkler 6 is already under pressure, the cavity between the piston 5 and the upper wall of the housing 1 is filled with water (or other fire extinguishing agent), and the sprinkler 6 is triggered when the thermoflask 13 is destroyed, when the temperature in the room reaches the operating temperature of the thermoflask 13, which leads to to the folding and falling out of the stops 12, and then to the falling out of the sprinkler 6 so that the piston 5 rests against the bushing 4. This imitates the principle of operation of a sprinkler sprinkler using a deluge sprinkler.

In addition, this unit can be installed both vertically downwards and at any angle to the burning surface, including vertically upwards.

Thus, due to the combination of essential features of the claimed invention, it was possible to create a deluge sprinkler attachment point, which, depending on the embodiments, is capable of operating in the mode of both a deluge-type sprinkler and a sprinkler.

The claimed invention meets the criterion of industrial applicability, since it can be manufactured using known technical means.

Claims

The drop-down deluge sprinkler fastening unit includes a hollow body, made with the possibility of attaching to the pipeline at one end, and equipped with a support sleeve at the other end, a piston is located inside the casing, made with the possibility of screwing the deluge sprinkler into it and moving along with it along the inner walls of the casing up to stop in the support sleeve, the inner diameter of the support sleeve being larger than the diameter of the spray head of the sprinkler, but less than the outer diameter of the piston, the assembly is also provided with at least one retainer configured to hold the piston together with the sprinkler in the initial position.
The fastening unit for the drop-down deluge sprinkler according to claim 1, characterized in that a sealant is used as a retainer, installed between the outer wall of the piston and the inner wall of the housing, while the degree of compaction is selected based on the weight of the piston together with the sprinkler installed in it so that in the absence pressure to keep them in their original position.
The fastening unit for the drop-down deluge sprinkler according to claim 1, characterized in that a spring is located between the piston and the support sleeve.
Attachment assembly for a drop-down deluge sprinkler according to claim 1, characterized in that two stops are used as a retainer, installed in the lower part of the assembly with the ability to maintain the sprinkler screwed into the piston in its original position, in its upper part resting against each other, having inclined outer edges, which rest on the inner surface of the support sleeve, made with a corresponding slope, and a thermobulb is installed between the stops in the lower part.
The fastening unit for the drop-down deluge sprinkler according to claim 1, characterized in that two stops are used as a retainer, installed in the lower part of the assembly with the possibility of maintaining the sprinkler screwed into the piston in its original position, in its upper part resting against each other, having straight outer edges, which rest on the inner surface of the support sleeve, and a thermal bulb is installed between the stops in the lower part.