RU210827U1 - DELAY CHAMBER OF WATER-FILLED SPRINKLER CONTROL UNIT - Google Patents

Abstract

The delay chamber belongs to the field of fire engineering, and specifically to automatic fire extinguishing devices, which can be used as part of a water-filled sprinkler control unit. The delay chamber for a water-filled sprinkler control unit is characterized by its execution in the form of a hollow vessel, assembled from two completely identical bowls, formed from a composite material, having longitudinal internal stiffening ribs converging towards the center of the bowl, also having a through hole in the center of the bottom of each bowl, made from the outside in the form of a threaded fitting. Outside, along the edge of each bowl, a shoulder is made with holes evenly distributed around the circumference in an even number of holes, while in each hole, alternating in two steps, where the step is the circumferential distance between adjacent holes, a thread is made, the remaining holes are made through and without threads. An annular groove is made in the end part of each bowl, in which a common sealing elastomeric ring is placed, the bowls are connected by the end parts together, while the threaded holes of one bowl are located coaxially with the holes made through and without threads in the other bowl, the bowls are bolted together through the holes . The bowls are made of corrosion-resistant composite material with reinforcing fiberglass, which has low adhesion. 1 w.p. f-ly, 2 ill.

Description

The delay chamber belongs to the field of fire engineering, and specifically to automatic fire extinguishing devices, and can be used as part of a water-filled sprinkler control unit.

Known slow chamber Viking model S-1, serving as a pulse tank, which is used with a control valve to reduce the likelihood of false alarms due to changes in the pressure of the water supply. The retarding chamber is made in the form of a tank having two coaxial holes located vertically (upper, lower); the body of the tank is made of malleable iron.

Known delay chamber model RC-1 from Tyco Fire Suppression & Building Products, installed in the control units of water-filled fire extinguishing systems, is designed to minimize the likelihood of false alarms caused by sharp fluctuations in the pressure of the water supply. The delay chamber is a hollow spherical vessel made of cast iron and having two holes located on the vertical axis.

Known delay chamber model AVDR company CHANG DER (CD), used in automatic sprinkler-type fire extinguishing installations and serves to prevent false operation of the automatic installation. The delay chamber is made in the form of a hollow cylindrical vessel made of cast iron and has two vertically arranged coaxial holes.

A common disadvantage for the known delay chambers is the difficulty in carrying out measures to clean the chambers from contamination, to remove sludge, the appearance of corrosion and the difficult removal of traces of corrosion.

Failure to eliminate contaminants, sludge, deposits leads to a change in the time delay values, which can lead to a malfunction of the equipment.

The technical problem to be solved by the present utility model is to increase the maintainability of the delay chamber, to create improved conditions for inspecting the internal cavity of the chamber, the passage sections of the holes and for efficient, easy-to-perform accelerated measures for their cleaning and repair.

The task is solved by a delay chamber for a water-filled sprinkler control unit, made in the form of a hollow vessel, assembled from two completely identical bowls, formed from a composite material with low adhesion, having a through hole in the center of the bottom of each bowl, made from the outside in the form of a threaded fitting having longitudinal internal stiffening ribs converging to the center of the bowl, while on the outside along the edge of each bowl there is a shoulder with holes evenly distributed around the circumference in an even number, while in each hole alternating in two steps, where the step is the distance along the circumference between adjacent holes, a thread is made, and in the end part of each bowl an annular groove is made, in which a common sealing elastomeric ring is placed, the bowls are paired with the end parts together, while the threaded holes of one bowl are located coaxially with the holes made through and without thread in the other bowl, the bowls are bolted together through holes.

In the best embodiment of the utility model, the bowls are made of a corrosion-resistant composite material with a reinforcing glass fiber having low adhesion.

As such a corrosion-resistant composite material, for example, glass-filled polyamide or polyphenylene sulfide can be used.

For the manufacture of bowls, the method of injection molding on an injection molding machine can be used.

The possibility of implementing a delay chamber for a water-filled sprinkler control unit is illustrated by illustrations in Fig. 1 and 2. FIG. 1 - general view of the delay chamber from above; fig. 2 is a general view of the delay chamber in section A-A.

The delay chamber for the water-filled sprinkler control unit is made in the form of a hollow vessel assembled together from two identical bowls 1 and 2, molded from a composite material and having one through hole 4 in the center of the bottom part 3, designed on the outside in the form of a threaded fitting 5, the bowls have internally longitudinal and converging to the center of the stiffener 6, outside the bowls along the edge, a shoulder 7 is made with holes evenly distributed around the circumference, in an even number, in each hole 8, alternating in two steps (where the step is the circumferential distance between two adjacent holes), a thread is made, and the holes 9 are made through and without threads, an annular groove 10 is made in the end parts of the bowls, in which a common sealing elastomeric ring 11 is placed, the bowls are paired with the end parts together, while the threaded hole 8 of the bowl 1 is located coaxially relative to the through holes 9 of bowl 2, both bowls are tightened with bolts 12.

The bowls are made of corrosion-resistant composite material with glass fiber reinforcing injection molding with low adhesion.

The delay chamber works as follows: water through the signal line of the valve of the water-filled sprinkler control unit enters the lower through hole 4 of the bowl 2, the delay chamber is filled, at the same time with a lower productivity, part of the water flows into the drainage through the upper through hole 4 of the bowl 1 and the flow-limiting compensator (signal line valve of the sprinkler water-filled control unit, flow-limiting compensator, pressure indicator in Fig. 1 and 2 are conventionally not shown). When the delay chamber is completely filled, the water pressure affects the pressure indicator installed at the outlet of the chamber in the upper hole 4, the indicator notifies the fire extinguishing system of the valve actuation. In case of accidental water inflows into the delay chamber, caused by pressure surges in the water supply source, the delay chamber does not have time to fill up, the valve actuation notification from the pressure alarm does not enter the fire extinguishing system.

The delay chamber is easy to assemble and can be easily disassembled into bowls without any special difficulties, which become accessible after disassembly for inspection of internal surfaces and passages in the choke holes. When disassembled, the delay chamber can be more effectively cleaned of dirt and sludge without difficulty, while the delay chamber is completely corrosion resistant, has a low adhesion surface.

The execution of bowls from a corrosion-resistant composite material with low adhesion contributes to less deposition of dirt on the inner surface, eliminates corrosion, which has a positive effect on the “repairability” indicator of the new design, reducing the repair time of the chamber.

Claims (2)

1. Delay chamber for a water-filled sprinkler control unit, characterized by execution in the form of a hollow vessel, assembled from two completely identical bowls, formed from a composite material, having longitudinal internal stiffening ribs converging towards the center of the bowl, also having a through hole in the center of the bottom of each bowl , made on the outside in the form of a threaded fitting, while on the outside along the edge of each bowl there is a shoulder with holes evenly distributed around the circumference in an even number, with each hole alternating in two steps, where the step is the circumferential distance between adjacent holes , a thread is made, the remaining holes are made through and without thread, an annular groove is made in the end part of each bowl, in which a common sealing elastomeric ring is placed, the bowls are paired with the end parts together, while the threaded holes of one bowl are located coaxially with the holes made through nym and without a thread in another bowl, the bowls are pulled together by bolts through the holes. 2. The delay chamber according to claim 1, characterized in that the bowls are made of a corrosion-resistant composite material with reinforcing fiberglass, which has low adhesion.

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