RU2747042C1 - Attachment unit for drop-down sprinkler irrigator - Google Patents

Abstract

FIELD: fire extinguishing.SUBSTANCE: present invention relates to the field of fire extinguishing, namely to devices designed for spraying a fire-extinguishing agent, it can be used when it is necessary to hide irrigators that are in standby mode. The attachment unit of the drop-down sprinkler irrigator includes a hollow case, at one end made with the possibility of joining to the pipeline, and at the other end equipped with a support sleeve. Inside the case there is a piston made with the possibility of screwing the sprinkler irrigator into it and moving it along the inner walls of the case until it stops in the support sleeve. The inner diameter of the support sleeve is made larger than the diameter of the spray head of the irrigator, but less than the outer diameter of the piston. The unit is also equipped with at least one lock, made with the possibility of holding the piston together with the irrigator in the initial position.EFFECT: creation of a reliable and simple attachment unit that would be suitable for sprinkler irrigators and would ensure their rapid and timely fall when activated in conditions of both low and high operating pressure.4 cl, 5 dwg

Description

The present invention relates to the field of fire extinguishing, in particular to devices designed for spraying a fire extinguishing agent, and can be used in premises with high demands on appearance (hotel halls, shopping centers, theater halls, etc.), when it is necessary to hide sprinklers in standby mode.

Known attachment point for a hidden (captive) sprinkler sprinkler [JSC "PO Spetsavtomatika", Product Catalog. Electronic resource: https://sa-biysk.ru/catalog/1373/, date of treatment 08/27/2020, see Appendix 1], including a housing inside which a sprinkler sprinkler is installed, on one side connected to the water supply pipeline, and on the other hand resting on a cover attached to the end of the body. As the temperature rises in the protected room, the decorative cover that masks the sprinkler first heats up. When a certain temperature level is reached (depending on the response temperature of the sprinkler), 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 thermosensitive bulb of the sprinkler is triggered and water is supplied to the ignition zone, extinguishing occurs.

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

Various drop-down sprinkler sprinklers are known, which are not units for fastening sprinklers, but independent one-piece sprinkler structures.

For example, a hidden sprinkler (outlet down) is known [Fairdrop LLC, Product Catalog 2017, pp. 53-54. Electronic resource: http://fire-drop.ru/support/catalog/, date of circulation 09/02/2020, see Appendix 2], consisting of a body, on one side connected to the water supply pipeline, and on the other side closed a lid held by solder. A deflector with two heat sensors is installed inside the case, held by a latch fixed with solder. In the event of a fire, the solder holding the lid and retainer melts, causing the lid to drop. After two heat sensors register a sufficient amount of heat, the deflector is set to the operating position (lowering down), and the water is evenly distributed over the entire irrigation zone.

The use of special solder for attaching the lid and the retainer also complicates the manufacturing technology of the sprinkler itself, because it is necessary to select the response temperature of the solder depending on the response temperature of the sprinkler. In addition, the design of the retainer is made of multi-element, which complicates the assembly technology of such a sprinkler.

The sprinkler for residential premises is also known [Survitec Group Limited. Electronic resource: https://survitecgroup.com/systems/nff-xflow-water-mist-solution/, date of treatment 09/02/2020, Appendix 3], consisting of a body, on one side connected to the water supply pipeline, and on the other side, closed with a lid. From the side closed by the lid, a lock washer is screwed into the body, the inner diameter of which is made with a narrowing towards the lid. An elongated cylindrical spray head is installed in the body cavity, the diameter of which also narrows towards the cover, corresponding to the internal diameter of the lock washer. Inside the lock washer, stops are installed, pressed against the inner walls of the washer with the help of a spacer between them, which is used as a thermal bulb. The spray head rests on top of the stops. When the temperature in the room rises to the temperature at which the sprinkler is triggered, the thermo-bulb collapses, the stops under the action of the weight of the spray head fall down, and the head falls out of the body, lingering in the washer, due to the narrowing of its diameter. Irrigation is in progress.

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 the spray head inside the only described form. In addition, the complex design of the stops involves the installation of thermowells in their lower part, extending beyond the lock washer, which can lead to damage to the thermowells during transportation or storage.

Thus, the prior art does not know the attachment points for drop-down sprinkler sprinklers. At the same time, the creation of such a unit is an urgent task, since in some fire extinguishing systems, the technical specifications for their installation provide for the use of sprinkler sprinklers from various manufacturers.

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

The specified technical result is achieved due to the fact that the attachment point of the drop-down sprinkler sprinkler includes

a hollow body, at one end made with the possibility of connection to the pipeline, and at the other end provided with a support sleeve,

inside the body there is a piston made with the possibility of screwing in a sprinkler sprinkler and moving with it along the inner walls of the body until it stops in the support sleeve,

moreover, the inner diameter of the support sleeve is made 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 made with the possibility of holding the piston together with the sprinkler in the initial position.

There are various options for implementing the main technical solution:

- a spring is used as a retainer, a spring is located between the piston and the support sleeve, while the compression ratio of the spring is selected based on the weight of the piston together with the sprinkler installed in it and the standby pressure of the sprinkler;

- two stops installed in the lower part of the unit with the possibility of supporting through the support ring and the posts of the sprinkler screwed into the piston in the initial position, in its upper part abutting against each other, having inclined outer edges that rest on the inner surface a support sleeve made with a corresponding slope, and a thermal bulb is installed between the stops in the lower part;

- as a retainer, two stops are used, installed in the lower part of the unit with the possibility of supporting through the support ring of the sprinkler screwed into the piston in the initial position, in its upper part abutting against each other, having straight outer edges that rest on the inner surface of the support sleeve , and a thermal bulb is installed between the stops in the lower part.

Thus, a simple and reliable design of the attachment unit is declared, which is suitable for sprinkler sprinklers of low and high pressure, since 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 pipe, and are held in their original position by the lock , and in case of falling out, they are fixed in the working position due to the fact that the piston abuts against the support sleeve.

FIG. 1 shows a fastening assembly with a spring-like retainer in the initial position.

FIG. 2 shows a fastening assembly with a spring-like retainer in the working position.

FIG. 3 shows a fastening assembly with a lock in the form of stops with inclined outer edges in the initial position.

FIG. 4 is a bottom view of the assembly of FIG. 3.

FIG. 5 shows a fastening unit with a lock in the form of stops with inclined outer edges in the working position.

The attachment point for the drop-down sprinkler sprinkler (Figs. 1-5) includes a hollow body 1, at one end made with the possibility of being connected to a pipeline (not shown in the drawing), for example, using a connecting nut 2 and a cutting ring 3, and at the other end equipped with support sleeve 4.

Inside the body 1 there is a piston 5, made with the possibility of screwing into it the sprinkler sprinkler 6 and moving with it along the inner walls of the body 1 until it stops in the support sleeve 4. The sprinkler sprinkler 6 can be screwed in so that its end can press the passage channel 7 in the body 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 (Fig. 3, 4), which flies out when water is supplied to the housing 1.

The support sleeve 4 is connected to the body 1, for example, by means of a threaded connection or by means of a tight fit and fixation with fasteners (not shown in the drawing), while the inner diameter of the support sleeve 4 is made 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 sprinkler 6 falls out, but allows the sprinkler head of the sprinkler 5 to be outside the unit for efficient spraying. For this, the sleeve 4 has a variable inner diameter so that a supporting 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 outer profile in order to hide the gaps during installation (Fig. . 1-4).

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 skewing in the housing 1. The outer diameter of the piston can be made the same (not shown in the drawing), and a variant of the piston 5 with a variable outer diameter (annular protrusion in Figs. 1-6) is also possible to save on the bushing material and reduce its weight and dimensions.

The assembly is equipped with at least one lock made with the possibility of holding the piston 5 together with the sprinkler 6 in the initial position. Various versions of the retainer are possible.

At least one seal 10 is installed between the outer wall of the piston 5 and the inner wall of the housing 1.

A spring 11 (Figs. 1, 2) can be used as a retainer, which is designed to hold the piston 5 together with the sprinkler 6 in the initial position, and also to retract the piston 5 together with the sprinkler 6 after triggering back to the initial position (when relieving pressure). The degree of elasticity of the spring 11 is selected depending on the standby pressure of the sprinkler 6 so that the spring 11 can hold the sprinkler 6 in the raised (initial) position.

Sprinkler sprinkler 6 is constantly under pilot pressure, and when triggered, under working pressure.

In another version, two stops 12 installed in the lower part of the unit with the possibility of supporting the sprinkler 6, screwed into the piston 5, in the initial position, in its upper part abutting against each other, having inclined outer edges (Fig. 3 -5), 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 thermal bulb 13. In this case, the sprinkler 6 rests on the stops 12 with the help of a support ring 14 located horizontally on the stops 12 and a cylindrical stand 15 so that there is no pressure on that part of the body of the sprinkler 6, in which the thermal bulb 16 of the sprinkler 6 is installed. In another embodiment, the support ring 14 and the cylindrical stand 15 can be made in the form of a single piece.

In this embodiment, a double degree of operation of the sprinkler 6 is ensured. Since when the temperature in the room rises, the thermal bulb 13 is first triggered, the sprinkler 6 falls out, and if the temperature continues to increase, the thermal bulb 16 is triggered and the extinguishing process begins. This makes it possible to prevent flooding of the premises when there is no need for extinguishing, i.e. in the absence of an actual fire source. For example, in the case of pampering and deliberate activation of the first thermo-bulb 13 or in the case when the fire was quickly extinguished by other means.

In this case, the spring 11 can also be present in the version with stops 12, however, it can only act as a retraction element.

A variant is possible when the stops 12 have straight outer edges (not shown in the drawing), which rest on the inner surface of the support sleeve 4, and a thermo bulb 13 is installed between the stops 12 in the lower part.

From the end opposite to the connection to the pipeline, the unit can be additionally equipped with an end washer 17 having an L-shaped profile and designed to hide the technological gaps when installing the unit in the ceiling, as well as for additional fixation of the sleeve 4 and stops 12 (when availability). Washer 14 can be secured to the sleeve 4 by means of a threaded connection or a tight fit and fixing with fasteners (not shown in the drawing). A decorative cover (not shown in the drawing) can be attached to the end face of the sleeve 4 or washer 17 (if any), which falls off when the sprinkler 6 falls off.

The unit can be equipped with at least one clamping bar 18, designed for more reliable installation of the unit on the ceiling (for example, tension) and to reduce vibrations in working condition.

The body 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 the operating pressure (water) is supplied exceeding the duty pressure and, accordingly, the degree of elasticity of the spring 11. The cavity between the piston 5 and the upper wall of the housing 1 is filled with water (or other extinguishing agent) and its pressure stretches the spring 11 and presses the piston 5 together with the sprinkler 6 until it stops against the bushing 4 so that the spray head of the sprinkler 6 is outside the unit and the process of extinguishing the fire begins.

In the presence of stops 12, the sprinkler 6 is triggered when the thermo-bulb 13 breaks down, when the room temperature reaches the operating temperature of the thermo-bulb 13. The stops 12, the ring 14, the rack 15 fall out, the spray head and thermo-bulb 16 of the sprinkler 6 are outside the unit. With a further increase in temperature, the thermal bulb 16 is destroyed and the process of extinguishing the fire begins.

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

Thus, due to the combination of essential features of the claimed invention, it was possible to create a simple and reliable attachment point for a sprinkler sprinkler.

Claims (8)

1. The attachment point for the drop-down sprinkler sprinkler includes a hollow body, at one end made with the possibility of connection to the pipeline, and at the other end provided with a support sleeve, inside the body there is a piston made with the possibility of screwing in a sprinkler sprinkler and moving with it along the inner walls of the body until it stops in the support sleeve, moreover, the inner diameter of the support sleeve is made 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 made with the possibility of holding the piston together with the sprinkler in the initial position. 2. The attachment point for the drop-down sprinkler sprinkler according to claim 1, characterized in that a spring is used as a retainer, located between the piston and the support sleeve, while the compression ratio of the spring is selected based on the weight of the piston together with the sprinkler installed in it and the standby pressure of the sprinkler. 3. The attachment unit for the drop-down sprinkler sprinkler according to claim 1, characterized in that two stops are used as a retainer, installed in the lower part of the unit with the possibility of supporting the sprinkler screwed into the piston through the support ring and posts in the initial position, in its upper part abutting against each other, having inclined outer edges, which rest on the inner surface of the support sleeve, made with a corresponding inclination, and a thermo bulb is installed between the stops in the lower part. 4. The attachment unit for the drop-down sprinkler sprinkler according to claim 1, characterized in that two stops are used as a retainer, installed in the lower part of the unit with the possibility of supporting through the support ring of the sprinkler screwed into the piston in the initial position, in its upper part abutting each other into another, 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.

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