RU89740U1 - DEVICE FOR TESTING SMOKE OPTICAL OPTICAL FIRE DETECTORS - Google Patents

Abstract

1. A device for testing optical smoke smoke detectors, comprising a housing with a rechargeable battery installed in it and a telescopic rod, characterized in that it contains a supercharger pump with a sampling unit and an air supply unit connected via an air supply hose to a smoke-generating mixture generator made with a bell for supplying a smoke-generating mixture, wherein the smoke-generating mixture generator is located on a telescopic rod. ! 2. The device according to claim 1, characterized in that the battery contains a display unit connected to it and an autonomous battery charge unit.

Description

The utility model relates to devices for verifying the health of smoke detectors, in particular to devices for testing optical detectors installed at a height of more than eight meters, which can be used for commissioning and commissioning of fire alarm systems in buildings and structures for various purposes.

At present, it is mandatory to equip office, production, and warehouse facilities with fire and security alarms.

Today, the choice of equipment for fire alarm systems is very large and is determined by many initial data and tasks on the security of the facility.

In particular, alarm installations containing optical smoke detectors based on the principle of light scattering are used. An optical smoke detector is capable of detecting light smoke, the particles of which are quite large in size. The detector is suitable for use in libraries, museums, hospitals, hotels, warehouses, computer rooms, industrial facilities, offices, that is, when it is necessary to receive a fire message as early as possible, already at the smoldering stage, when education hot spots of flame and thermal radiation have not yet begun. The use of an optical smoke detector is quite widespread.

Accordingly, they are subject to stringent requirements for the reliability of their operation. In this regard, there is a need to create devices for testing them with a high degree of reliability of checking the operability of detectors.

The operability of fire detectors is a determining element in the operation of the entire fire protection system of an object. Functional testing of fire detectors is a mandatory procedure during commissioning, putting the system into operation and periodic maintenance work on fire protection systems.

The purpose of tests to control the functioning of fire detectors is the ability of each detector to respond to the factor for which it is designed, by modeling similar physical parameters of the fire from the outside.

Smoke alarms must be tested at the places of their permanent installation using a method that makes sure smoke is able to fill the sensitive chamber and generate an alarm (using smoke aerosols). It should also be taken into account that the materials used must not cause damage or influence the subsequent operation of the detector.

In order to ensure that smoke is not limited to the detector’s optical chamber and triggers the detector, as well as triggering an alarm, all detectors are tested once a month in accordance with local fire safety standards and the approved Regulations.

Currently, prior art constructions of devices for testing optical smoke emitters are known.

So, from the patent of the Russian Federation No. 2029376 (published on 02/20/1995, IPC 6: G08B 17/10), a device is known for checking the operability of smoke detectors, which includes a bell that completely covers the tested detector and is combined with a handle to which a fan is connected with a corrugated hose. A holder is located in the socket in which a smoke generating charge is installed. The fan controls the air supply.

The disadvantages of this device are:

- insufficient reliability of checking the threshold of operation of fire detectors in the sensitivity range in the conditions of smoky environment with an optical density of 0.05 ÷ 0.2 dB / m;

- volatility of the tester;

- the presence of a network voltage converter ~ 220 VAC;

- dimensions;

- the formation and flow of smoke is reproduced and controlled mechanically by rotating the handle;

- the presence of a smoke generating charge.

The closest analogue to the patented solution is a device for testing a smoke alarm, disclosed in the description of US patent No. 4271693 (published on 06/09/1981, MPK7: G01M 19/00).

A device for testing a smoke alarm includes a battery, a telescopic telescopic rod, at the end of which there is a checker of combustible smoke-generating material, for ignition of which an electric heating element is used, and means for supplying electric power are placed in the rod body.

The disadvantages of the known device are the inability to control the concentration of smoke in the stream, which does not allow to control the threshold of the detectors:

- the presence of an electric heating element;

- the presence of a smoke generating charge.

The technical result of the patented utility model is the ability to verify the operability of smoke optical fire detectors in places of their permanent installation by means of creating an aerosol that, in its characteristics, corresponds to natural smoke with an average particle diameter of up to 2.0 microns of a dosed supply of smoke-forming liquid.

Also the technical result is the creation of a non-volatile device for testing fire detectors.

The claimed technical result is achieved due to the use for testing smoke optical fire detectors of a device containing a housing with a rechargeable battery installed in it, a pump-supercharger with a intake unit and an air supply unit connected via an air supply hose to a smoke-generating mixture generator made with a smoke-supplying bell mixture (smoke), while the smoke generator is located on a telescopic rod.

Using a smoke-generating generator on a telescopic rod allows you to create the necessary concentration (aerosol) directly near the optical chamber of the fire detector under test, which significantly reduces the consumption of smoke-forming liquid.

At one refueling, 7 ml of smoke-generating liquid is enough to check 270 fire detectors.

The proposed smoke generator is completely non-volatile. The principle of its operation is based on the method of a pneumatic liquid atomizer.

The principles embodied in the presented utility model make it possible to obtain the following technical characteristics:

one Supply voltage 12 V from the built-in battery 2 Power consumption, no more 7 VA 3 Working pressure in the chamber of the aerosol generator 50 kPa four Smoke flow rate No less than 2.5 l / min 5 Overall dimensions in packing (without sliding bar), no more 300 × 250 × 120 mm 6 Weight, no more 2.5 kg 7 Maximum time of continuous operation, not less 90 min (approximately 270 smoke detectors at a single refueling) 8 Aerosol dispersion 0.8-2.0 μm 9 The volume of the filled smoke-forming liquid 7 ml

Moreover, the proposed device for testing refers to auxiliary devices and is not a means of metrological verification of smoke control devices and is not subject to mandatory certification.

The smoke-generating liquid used in it, the rechargeable battery and the charger have certificates of conformity of the Russian Federation.

To control and ensure continuous operation of the device, the battery may contain connected to the display unit and a stand-alone battery charge unit.

Next, the solution is illustrated by reference to figure 1, which shows a General view of the tester of smoke detectors.

The device comprises a housing 1 with a battery 2 installed therein, a supercharger pump 3 with an air intake unit 4 and an air supply unit 11, an air supply hose 5, a telescopic rod 6, a smoke generator 7 with a bell for feeding the smoke mixture and located in its body spray 8, while the smoke generator 7 is located on the telescopic rod 6 and is connected by a hose to the air supply unit 11.

The battery 2 comprises a display unit 9 connected to it and an autonomous battery charge unit 10.

The device operates as follows.

The smoke-forming liquid is poured into the lower part of the atomizer 8 to the “max” mark (7 ml), then the supply nozzle of the atomizer is connected to the nozzle of the air supply unit 11 of the device via the air supply hose 5. Using a telescopic rod, the pipe for supplying the smoke-generating mixture (smoke) is installed directly near test fire detector. The operation mode switch is set to the “ON” position, which, in particular, can be located on the front panel of the display unit. After 10 ÷ 15 seconds, the testing device enters the operating mode. The principle of operation of the device is based on the pneumatic effect of liquid spraying a smoke-generating liquid in a smoke-generating mixture (smoke) generator, where air is supplied under pressure with an air hose and aerosols of a smoke-forming mixture with a dispersion of not more than 2.0 microns are formed at the outlet of the bell, which, in turn, leads to the activation of a fire detector with the issuance of an audio signal on the control panel of the Fire alarm installation (not shown in the figure).

After the end of operation, the switch is set to the “OF” position.

Claims (2)

1. A device for testing optical smoke smoke detectors, comprising a housing with a rechargeable battery installed in it and a telescopic rod, characterized in that it contains a supercharger pump with a sampling unit and an air supply unit connected via an air supply hose to a smoke-generating mixture generator made with a bell for supplying a smoke-generating mixture, wherein the smoke-generating mixture generator is located on a telescopic rod. 2. The device according to claim 1, characterized in that the battery contains a display unit connected to it and an autonomous battery charge unit.