RU2775503C1 - Centrifugal drencher nozzle - Google Patents

Abstract

FIELD: fire protection.

SUBSTANCE: centrifugal drencher nozzle belongs to fire-fighting equipment and can be used in fire extinguishing installations for fire protection in residential premises, ensuring uniform distribution of the liquid flow at an operating pressure of 0.05 MPa. The centrifugal drencher nozzle is made in the form of a hollow housing, which has an inlet lower part with an external connecting thread, has an outlet part inside the housing made in the form of a diffuser, while inside the housing the inlet lower part is made in the form of a confuser, in which a cast swirler with a cast insert placed in it is located concentrically relative to the axis of the housing, above the swirler, a chamber is made in the housing, the exit from the chamber is made through the neck, which is characterized by a ratio of the neck height to its diameter equal to 1:5, the neck is smoothly coupled with the diffuser, the cast swirler is made in the form of a hollow cast sleeve, which has a left trapezoidal four-way thread on the outer lower cylindrical part, the lower cylindrical part of the cast swirler smoothly passes into the upper spherical part, which is mated with the upper cylindrical part, inside the lower cylindrical part of the cast swirler is a cylindrical cavity, passing into the middle part of the cast swirler into a cavity made in the form of a truncated cone, the upper part of this cone-shaped cavity is connected to the chamber by means of a diffuser, a cast insert is installed in the cylindrical cavity of the cast swirler, made in the form of a central two-way guide part with the right direction for the flow of the fire extinguishing agent, while each stroke of the guide part is made in the form of a lower inclined plane, passing into a horizontal step, which passes into the upper inclined plane.

EFFECT: expansion of the range of fire extinguishing means.

1 cl, 5 dwg

Description

The proposed technical solution relates to fire fighting equipment and can be used in fire extinguishing installations for fire protection in residential premises, providing a uniform distribution of fluid flow at an operating pressure of 0.05 MPa.

In the prior art, many devices are known that use the centrifugal forces of liquid flows to create a uniformly distributed atomized liquid flow over the area to be protected.

The following are considered as analogues: centrifugal atomizer RU 30275, atomizer RU 90692, centrifugal sprinkler RU 2297865.

At present, the RC-180 centrifugal sprayer, produced by CJSC PO Spetsavtomatika, Biysk, is widely used to distribute the sprayed flow of a fire extinguishing agent (FTE) over the protected surface, the design of which is based on the patent for the invention RU 2297865.

Known atomizer contains a housing, a sleeve and an insert with screw channels applied to their outer surfaces; between the body in the sleeve, one vortex chamber is formed, having inlets and an outlet, and between the sleeve and the liner, another vortex chamber is created, having its own inlets and an outlet.

The presence of two concentrically located vortex chambers makes it possible to form two concentrically located vortex flames of the OTV spray, providing uniform irrigation of the protected area.

In another well-known liquid atomizer, made according to the utility model patent RU 90692, uniform spraying over the protected surface is ensured by the formation of sprayed internal and external torches of OTV, while the inner torch is created by means of a direct-flow central atomizer with a socket at the outlet, and the outer torch is made on the periphery of the flow OTV through a passage chamber made with internal and external funnels, which are coaxial with the fitting.

In the well-known centrifugal sprinkler, made according to the invention patent RU 2297865, the centrifugal forces acting on the flow of FTV are set by making an inlet device in the form of a tangential pipe connected to the body with a core, and fixed on the body of the nozzle, having a central and side holes and a conical reflector.

The use of analogues does not guarantee, if they are connected to water sources with a working pressure of 0.05 MPa, effective extinguishing. In addition, the analysis of the known devices described above showed that the implementation of these devices requires the use of complex and labor-intensive technological methods, which affects the cost of production.

There are few nozzles and sprinklers on the consumer market, known as devices that are relatively cheap and capable of effectively extinguishing in residential premises, in cases where they are used to extinguish water obtained from a drinking water supply system, in which the operating pressure range often starts from 0.05 MPa .

When creating the invention, the task is to expand the arsenal of technical means, namely: the inclusion in the arsenal of technical means of deluge centrifugal nozzles capable of effectively spraying fire extinguishing agents, including tap water obtained at an operating pressure of fire extinguishing agents from 0.05 MPa from a drinking water supply .

The technical result should consist in the implementation of the declared purpose, namely: to manifest itself in the ability to function as a fire-fighting device when using water obtained from the water supply of a household and drinking network with a working pressure of 0.05 MPa as an extinguishing agent, spraying it evenly over the protected surface. Known analogues are not capable of performing such a function.

The task is solved by a centrifugal deluge nozzle, which, when activated, is characterized by the action from the water supply network for household and drinking purposes with an operating pressure of OTV from 0.05 MPa, the implementation of a hollow body, which has an inlet lower part with an external connecting thread, has a hexagon, made on the middle part of the housing, has an outlet part inside the housing, made in the form of a diffuser, while inside the housing the inlet lower part is made in the form of a confuser, in which a cast swirler with a cast insert placed in it is located concentrically with respect to the axis of the housing, a chamber is made above the swirler in the housing, the outlet from the chamber is made through a neck of a certain shape, which is characterized by a ratio of the height of the neck to its diameter of approximately 1:5; the neck is smoothly mated with the diffuser, the swirler is made in the form of a hollow cast bushing, in which a left-hand trapezoidal four-start thread is made on the outer lower cylindrical part, the lower cylindrical part of the cast swirler smoothly passes into the upper spherical part, which mates with the upper cylindrical part, while the diameter of the lower cylindrical part of the swirler is 1.7 times larger than the diameter of its upper cylindrical part, inside in the lower cylindrical part of the cast swirler a cylindrical cavity is made, passing in the middle part of the cast swirler into a cavity made in the form of a truncated cone, while the angle of convergence of the side wall of the truncated cone is approximately is equal to 23°, the upper part of this cone-shaped cavity is connected with the chamber by means of a small diffuser, a cast insert is installed in the cylindrical cavity of the cast swirler, made in the form of a central two-way guide for the flow of the ETV with the right direction, n At the same time, each stroke of the guide part is made in the form of a lower inclined plane, turning into a horizontal step, which turns into an upper inclined plane.

The body, swirler, insert can be made of polyphenylene sulfide TERMORAN PFS SV - 40 TU 2016.59-001-01531596-2018, which is a plastic mass.

The method of manufacturing parts can be carried out highly productively, at low cost, practically without waste, using widely used thermoplastic machines.

The proposed centrifugal deluge nozzle consists of simple three parts, made in the form of bodies of rotation, without dead-end and closed cavities inside, made of plastic by injection molding, while the assembly of parts, quality control of parts and the nozzle itself are easily feasible.

Thus, the claimed technical solution meets the criterion of "industrial applicability".

For the first time in the proposed technical solution, the possibility of its use is manifested, when providing fire protection for residential premises, by supplying water as a fire extinguishing agent at a relatively low pressure (from 0.05 MPa) from a source of drinking water, ensuring uniform spraying of water over the protected surface , while new in the technical solution are the designs of all three parts that form the nozzle and, when the nozzle is activated, provide a new original combination of multidirectional OTV flows both inside the nozzle and at the exit from it.

The flow of OTV entering the nozzle is divided into differently directed swirling peripheral and central flows.

The peripheral flow, passing through the helical channels between the housing and the swirler, receives the translational and angular left-hand components of the flow velocity. The central flow, passing in the lower cylindrical part of the swirler along the central two-way right-hand guide part (liner), enters the narrowing space of the swirler. Both streams meet in the chamber, while they have different velocities, both along the common axis of motion and angular. Further, the peripheral and central flows, passing through the neck, enter the diffuser, which is accompanied by a sharp pressure drop, separation of the flow from the housing, crushing of the FTA flows and uniform spraying over the protected surface.

In the best version of the image of the nozzles

Based on the foregoing, it can be argued that the technical solution meets the criterion of "novelty".

The invention is described in more detail with reference to the drawings, where:

Fig. 1 - a general view of the centrifugal deluge nozzle in section.

Fig. 2 - bottom view of the nozzle centrifugal deluge.

Fig. 3 is a general front view of the cast swirler.

Fig. 4 is a general front view of the cast insert.

Fig. 5 is a general isometric view of a cast insert.

The centrifugal deluge nozzle, operating from a water supply network with a working pressure of 0.05 MPa, is made in the form of a hollow body 1, which has an inlet lower part 2 with an external connecting thread, has a hexagon 3, made on the middle part of the body, has an outlet part inside the body , made in the form of a diffuser 4, while inside the body the inlet lower part is made in the form of a confuser 5, in which a cast swirler 6 is located concentrically with respect to the axis of the body with a cast insert 7 placed in it, a chamber 8 is made above the swirler in the body, the exit from the chamber is made through a neck 9 of a certain shape, which is characterized by a ratio of the height of the neck to its diameter, approximately equal to 1:5, the neck is smoothly mated with the diffuser, the cast swirler is made in the form of a hollow cast bushing, in which the outer lower cylindrical part 10 has a left-hand trapezoidal four-start thread 11 , the lower cylindrical part of the cast swirl In order to smoothly pass into the upper spherical part 12, which mates with the upper cylindrical part 13, inside in the lower cylindrical part of the cast swirler, a cylindrical cavity is made, passing in the middle part of the cast swirler into a cavity 14, made in the form of a truncated cone, the upper part of this cone-shaped cavity by means of a small diffuser 15 communicates with the chamber, a cast insert is installed in the cylindrical cavity of the cast swirler, made in the form of a central double-threaded guide part for the flow of FTA with the right direction, while each stroke of the guide part is made in the form of a lower inclined plane 16, turning into a horizontal step 17, which passes into the upper inclined plane 18.

Works nozzle deluge centrifugal as follows.

When the nozzle of the deluge centrifugal nozzle is activated in the process of extinguishing a fire, the FTV from the pipeline for domestic and drinking purposes enters the confuser 5 under pressure, then the flow of FTV is divided into a peripheral flow, which, twisting through four channels formed in the space between the turns of the left trapezoidal four-start thread 10 and cast body 1, enters the chamber 8, the central flow is directed there, which, passing through the lower cylindrical part 10 of the cast swirler 6, splits by means of a cast insert 7 into two flows slightly twisted to the right, which fall into the cavity formed by the truncated cone 14, then both flow under pressure through a small diffuser 15 of the swirler enter the chamber. From the chamber, the peripheral and central flows, escaping through the neck 9, passing the diffuser 4, are discharged and crushed, separated from the body and sprayed over the protected area.

Claims (2)

1. Centrifugal deluge nozzle, powered from a water supply network for domestic and drinking purposes with a working pressure of a fire extinguishing agent (OTV) of 0.05 MPa, characterized by the implementation of a hollow body in the form of a body of rotation, which has an inlet lower part with an external connecting thread, has inside the body the outlet part made in the form of a diffuser, while inside the body the inlet lower part is made in the form of a confuser, in which a cast zivoriter is located concentrically with respect to the axis of the body, made in the form of a body of revolution, with a cast insert placed in it, made in the form of a body of revolution , a chamber is made above the swirler in the housing, the exit from the chamber is made through a neck, which is characterized by a ratio of the height of the neck to its diameter equal to 1:5, the neck is smoothly mated with the diffuser, on the outer lower cylindrical part of the cast swirler, a left-hand trapezoidal four-start thread is made, the lower cylindrical part cast s of the swirler smoothly passes into the upper spherical part, which mates with the upper cylindrical part, while the diameter of the lower cylindrical part of the swirler is 1.7 times greater than the diameter of its upper cylindrical part; swirler into a cavity made in the form of a truncated cone, while the angle of convergence of the side wall of the truncated cone is 23°, the upper part of this cone-shaped cavity communicates with the chamber by means of a diffuser, a cast insert is installed in the cylindrical cavity of the cast swirler, made in the form of a central two-way for the flow of FTV guide part with the right direction of flow, with each stroke of the guide part is made in the form of a lower inclined plane, turning into a horizontal step, which turns into an upper inclined plane. 2. The centrifugal deluge nozzle according to claim 1, characterized in that the body, swirler, liner are made of polyphenylene sulfide, which is a plastic mass.

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