RU2170125C1 - Sprinkler device - Google Patents

Abstract

FIELD: forestry engineering. SUBSTANCE: device has base with connecting pipe having outlet opening, spraying rosette fixed on the base under the connecting pipe, locking unit with member destructible at given threshold temperature and control unit for sprinkler coming into action. The control unit has incombustible ribbon fixed on the base with one of its ends. The material properties enable the free end to roll-in into a roller. The other end of the ribbon is attached to the spraying rosette. The ribbon unwinds when sprinkler device comes into action. The roller is placed on pan attached to the spraying rosette with flexible linking members and on one edge and to removable inlay on the opposite side. The inlay is manufactured from material having acoustic emission properties. It is positioned between the destructible member and locking unit. EFFECT: high reliability in operation; easy to handle device. 2 cl, 1 dwg

Description

 The invention relates to fire fighting equipment, namely to sprinkler sprinklers used in automatic water and foam fire extinguishing systems for spraying water or aqueous solutions of blowing agents.

 Known sprinkler sprinklers, which are devices containing a base with a fitting installed on it with an outlet, a spray outlet mounted on the base under the nozzle, a locking assembly that holds it in a normally closed state, a destructible element that collapses when a predetermined threshold temperature is reached and releases a passage cross section of a sprinkler for supplying a fluid, a pressure device. (See, for example, Ivanov E.N. Automatic fire protection. M: Publishing house of building literature, 1971, p. 74, 75). Such devices are widely used for extinguishing and localizing fires, for creating water curtains, cooling technological equipment and for other fire fighting tasks. Structurally, said sprinkler sprinklers can be divided into two large groups of devices. The first group includes devices that use fusible locks and junctions that are destroyed by threshold temperature. (See, for example, "Standards for the design of automatic fire extinguishing installations for cable structures" VSN 47-85, USSR Ministry of Energy, 1985, p. 19, 20). The common disadvantages of these devices are the design complexity and lack of reliability, due to the fact that the low-melting solder has low mechanical characteristics under conditions of holding the shut-off unit at high operating pressures in automatic fire extinguishing systems, which leads to flow phenomena during which the integrity of the junction is impaired and a false positive occurs. In turn, false alarms, accompanied by uncontrolled water supply, as a rule, lead to significant damage associated with damage to material assets and the shutdown of the process at the protected facility. Moreover, the probability of false positives increases with increasing operating temperatures. This is due to an increase in the flow phenomenon of the alloy compound. According to some reports, false alarms of sprinkler sprinklers are especially dangerous at operating temperatures exceeding 0.75 ... 0.8 of the device’s actuation temperature. In some cases, devices of this type cannot be used in chemically aggressive environments due to the formation of galvanic pairs at the joints of dissimilar metals. In connection with the foregoing, there is a decrease in the scope of this group of devices.

 This drawback is partially deprived of sprinkler sprinklers of the second group, containing a clamping device with a destructible element pressed against the locking unit, in which hermetic flasks made of brittle material (glass) and filled with low-boiling liquid, the vapor pressure of which is used as a destructible element at a given temperature collapses when the set temperature is reached (see, for example, promotional materials from Viking Corporation, www.vikingcorp.com). These sprinkler devices are structurally simpler and have a wider scope due to the sufficient variety of low-boiling media and their mixtures. In addition, these devices are faster than devices using alloy compounds, and can be more widely used in chemically aggressive environments as using more resistant materials (bronze, stainless alloys, glass, ceramics). However, these devices have a significant drawback - sensitivity to exceeding the pressing force. This is due to the fragility of the material of the flasks. Particularly dangerous, this drawback should be considered in the case of formation due to exceeding the pressing force of through non-developing microcracks, as a result of which a leak of low-boiling liquid from the internal volume of the flask may be observed, which will lead to failure of the sprinkler in the event of a fire.

 Known sprinkler (PCT, WO 98/28042, 07/02/98), which contains a base with a fitting mounted on it with an outlet, a spray outlet, mounted on the base under the fitting, an element that is destroyed at a given threshold temperature, a locking unit in the form of an elastic sealing device held by a destructible element at a given temperature, made in the form of a sealed flask containing a boiling liquid, a clamping device. This device has a major drawback - increased ability to deform the locking unit with the ability to save particles of the activated destructible element in the flow section of the sprinkler after it is triggered.

 Also known is a sprinkler (RF patent 2053824, IPC 6 A 62 C 37/08) containing a base with a fitting mounted on it with an outlet, a spray outlet secured to the base under the fitting, a locking assembly and an element made of a predetermined threshold temperature made of material with a "shape memory" in the form of a thin-walled gutter that loses stability upon reaching a threshold temperature when the heat-sensitive element passes to an non-adjacent form of equilibrium, and a clamping device.

 The disadvantages of this device are the sensitivity of the thin-walled element to the conditions of edge support, especially with difficult to control random eccentricities that occur during the final stages of its clamping, which can lead to false triggering of the sprinkler.

 This drawback is partially eliminated in the development of the said device, the sprinkler, as described in the application for the patent of the Russian Federation 95102522, 6 A 62 C 37/08, in which measures were taken to center the heat-sensitive element. However, this device is not free from a significant drawback - the possibility of false alarms that can occur due to the adverse effects of induced and random imperfections in the shape of a thin-walled element, which inevitably occur during the manufacture of ventilation holes in it by any of the known technological methods. (It is known that for thin-walled elements, due to initial imperfections, the critical load corresponding to the lower limit of stability loss can be reduced to 3 ... 5 times in comparison with a defect-free sample).

 All mentioned sprinkler devices are not free from a significant drawback, namely, insufficient usability when replacing triggered sprinklers. This is due to the fact that they do not have a trip indicator that allows you to quickly identify the triggered sprinkler or their group and thereby achieve improved serviceability.

 This drawback is deprived of the technical solution "Sprinkler sprinkler" according to the USSR copyright certificate for the invention N 1443889 A1 A 62 C 37/08 from 05/08/87, bull. N 46, 12/15/88.

 The device comprises a base with a nozzle mounted on it with an outlet, a spray outlet secured to the base under the nozzle, a locking assembly and an element that can be destroyed at a predetermined threshold temperature, means for controlling the actuation of the sprinkler in the form of a tape rolled up onto a roll placed on a spray outlet unwound by flow sprayed liquid when the sprinkler is triggered.

 This device is free from the above disadvantages, as it contains a trip indicator made in the form of a tape rolled up into a roll, which is placed on the spray outlet and unwinds when the sprinkler is triggered by the action of the sprayed liquid. This allows you to quickly visually identify triggered sprinklers and quickly replace them, restoring the functionality of the automatic fire extinguishing system.

 This device is taken as a prototype.

 However, the said device is also not free from a significant drawback, namely from the possibility of a false indication of operation. This drawback is due to the fact that the placement of the indicator strip directly on the spray outlet must be designed for a fairly weak effect of the jets of the sprayed medium, and therefore cannot hold it firmly enough. In this case, small force impacts, for example, vibration of the pipelines of the sprinkler system when opening nearby sprinklers, impact of air jets, can lead to the fall of the indicator tape roll without opening the sprinkler itself, which corresponds to a false indicator operation.

 All of the mentioned devices, sprinkler sprinklers, have a common significant drawback: the impossibility of increasing the reliability of the elements that are destroyed at a given temperature due to the individual adjustment of the force of their pressing in order to exclude their unacceptable overload, which leads to cracking of brittle and destroyed elements and to deterioration in the quality of operation of their other types.

 The technical result achieved by the invention is to increase the reliability of operation and ease of maintenance of the sprinkler.

 This is achieved by eliminating false positives of the indicator device due to the use in the sprinkler sprinkler containing a base with a nozzle mounted on it with an outlet, a spray outlet secured to the nozzle base, a locking unit with an element that is destroyed at a given threshold temperature and closing the nozzle outlet, and irrigation trigger control means, made in the form of a tape, one end fixed on the base of the nozzle and made of fireproof material, which prints the possibility of elastic folding into a roll of its free end, which is unwound when the sprinkler is triggered, while according to the invention, the sprinkler sprinkler is equipped with a plate and a crease pad, a roll of tape is placed inside the volume between the spray socket and the plate attached by flexible connections along one edge to the spray socket, and opposite edge - to the crease pad, which is located in the locking unit and is in contact with the destructible element. In addition, the crease pad is made of acoustic emission material.

 Conducted an information search showed that the prior art has not identified technical solutions with the listed distinguishing features, allowing to solve the problem.

The invention is illustrated in the drawing, where the numbers indicate:
1 - the base with a fitting installed in it for connection to the pipeline network;
2 - locking node sprinkler;
3 - element destroyed at a given threshold temperature;
4 - crease pad made of acoustic emission material;
5 - spray outlet;
6 - clamping device;
7 - a cassette with a tape of fireproof material rolled between it and a spray outlet 5 folded into a roll 8;
9 is a flexible connection, one end of which (10) is fixed on the bent part of the crease pad 4, and the other end (11) is attached to the side surface of the cartridge 7;
12 - flexible connection connecting the cassette 7 and the socket 5;
13 - sprinkler frame.

 The present invention is feasible according to the used materials and manufacturing techniques, and, therefore, meets the criterion of "industrial applicability". As the main materials, all their grades are approved for pipe fittings - for body parts; glass, ceramics, low-melting alloys based on lead, tin, bismuth, cadmium and others are used for the manufacture of destructible at a given temperature. For creased gaskets used in the claimed invention, “food” tin and its alloys having the effect of acoustic emission are used, that is property to generate pulses of sound vibrations during deformations exceeding specified ones. In this case, gaskets that generate acoustic emission noise upon reaching predetermined threshold loads can be used - as a result of using the Kaiser effect.

 Used assembly technology (option).

 Sprinkler sprinkler is assembled as a single product as follows. A liner of the locking assembly with a seal 2 is installed, between it and the clamping device 6, a crease pad 4 and an element 3 that is destroyed at a given temperature are placed, with the clamping device 6, the assembled parts 2, 4 and 3 are brought into mechanical contact until the level of acoustic emission signals corresponding to a given force clamping; the socket 5 and the plate 7 are attached to the product — using a flexible connection 9 connecting the flanging edge of the crease pad 10 to the attachment point 11 on the plates 7 and using a flexible connection 12 connecting the spray outlet 5 to the plate 7. In this form, this device is ready for installation on the distribution pipeline of a sprinkler fire extinguishing installation.

 In a static state, the sprinkler sprinkler operates as follows. The metered (using a crease pad 4) clamping force created by the clamping device 6 is transmitted through it to the shut-off unit 2, which holds the fluid pressure acting from the side of the base fitting 1. The plate 7 is held by flexible ties 9 and 12 together with the inside of the volume between it and the spray outlet 5, an indicator tape rolled up into a roll 8. The roll does not unwrap from accidental influences, which eliminates the false indication of the sprinkler actuation.

 The operation of the device is as follows. Upon reaching the threshold predetermined temperature, the destructible element is destroyed, releasing the locking assembly 2 from mechanical contact. Under the pressure in the pipeline, the liner of the locking assembly 2 is pushed out, as a result of which the creased gasket 4 is dropped, and the plate 7 connected through it via a flexible connection 9 gets freedom of movement and under the action of its own weight and elastic forces of the indicator tape, rolled up into a roll 8, departs from the socket 5, freeing it. The indicator tape roll is unwound, which visually signals the occurrence of a sprinkler sprinkler.

Claims (2)

 1. A sprinkler sprinkler containing a base with a nozzle mounted on it with an outlet, a spray outlet mounted on the nozzle base, a locking unit with an element that is destroyed at a predetermined threshold temperature and closing the nozzle outlet, and a sprinkler actuation control device made in the form of a tape, one end fixed on the base of the fitting and made of fireproof material, providing the possibility of elastic folding into a roll of its free end, unwound when sprinkler irrigation, characterized in that it is equipped with a plate and crease pad, while the roll of tape is placed inside the volume between the spray outlet and the plate, attached by flexible ties along one edge to the spray outlet, and on the opposite edge to the crease pad, which is located in the shut-off node and is in contact with the destructible element.  2. The sprinkler according to claim 1, characterized in that the crease pad is made of acoustic emission material.