RU102513U1 - TANK WITH DOSER - Google Patents

Abstract

 A metering tank, including a metal tank under pressure, inside of which there is a rubber membrane forming an additional internal tank, a metering device is connected from the outside to the tank body, which is connected to the main water supply pipe, which is equipped with a valve to reduce the pressure at the inlet inlet a pipeline attached to the tank body connects the dispenser with an inlet pipe to the water tank; at the outlet, the output pipe attached to the tank body is connected the dispenser with foam suction line for the foaming agent is drawn, to determine the volume of the used foaming agent, a flowmeter with a secondary device is provided on the supply line of the foaming agent to transmit a signal to a personal computer, a valve controlled by a solenoid is installed on the foam supply line.

Description

A tank with a dispenser is fire fighting equipment, and refers to stationary type fire extinguishers.

A tank with a foam dispenser is installed in those places where a high degree of fire protection is required. It can be used synthetic, protein foaming agents. Vertical and horizontal execution of a tank with the batcher is possible.

The dispenser tank includes a metal tank under pressure, inside of which there is a rubber membrane forming an additional internal tank, and a dispenser is connected to the tank body from the outside. The dispenser is connected to the main water supply pipe. At the inlet, a pipe attached to the tank body connects the dispenser to the inlet pipe to the tank (for water). At the outlet, a pipeline attached to the tank body connects the dispenser to the suction foam line (for a foaming agent).

To determine the amount of foaming agent consumed, a flowmeter with a secondary device is provided on the supply line of the foaming agent to transmit a signal to a personal computer (PC).

The customer can choose the option of a tank with a dispenser, in which water will be in the tank on the outside of the membrane, in this case the foaming agent is in the inner tank inside the membrane; or an embodiment of a tank with a dispenser in which water will be in the inner tank inside the membrane, in which case the foaming agent is in the tank tank.

Consider the main version of the tank with a dispenser, in which the foaming agent is in the inner tank formed by the membrane, and water is in the tank on the outside of the membrane.

Water from the main water supply pipe is supplied to the tank through the inlet pipe. Due to the pressure created by filling the tank, the foaming agent is pushed into the outlet of the suction pipe. Further, due to the suction effect, the foaming agent enters the dispenser, which creates a mixture with the desired percentage of dosing; it also uses a diaphragm with a calibrated hole installed between the connecting flange of the pipeline and the dispenser.

Figure 1 shows a diagram of a vertical tank with a dispenser;

figure 2 shows a schematic of a horizontal tank with a dispenser;

figure 3 shows a diagram with two tanks with dispensers.

The tank with a dispenser is a steel tank 1 (Figure 1-3) under pressure, for storing the foam concentrate, and dispenser 5, which determines the volume of water and foam concentrate for mixing them together in a predetermined, pre-selected proportion.

The dispenser 5 is equipped with a check valve 10 mounted on the foam concentrate pipe to prevent the backflow of water into the tank 1. A pressure reducing valve 26 and a pressure gauge 27 are installed on the water supply pipe, which allows monitoring the pressure in the system. Two pressure gauges, one on the foam line 2, the other on the dispenser 15, allow you to track the pressure at the foam hole and the pressure inside the tank 1.

The membrane 16 is installed inside the tank 1 and forms an internal tank for the separation of water and foam concentrate and maintains the concentrate under the same pressure as the water pressure at the inlet.

During operation, the foam concentrate is supplied from the bottom of the tank, through the fill / drain valve of the concentrate 6 and fills the inner reservoir of the membrane 16. The amount of foam concentrate supplied is determined by the concentrate level indicator 12, for repair work a drain valve of the concentrate level indicator 14 is provided.

Water enters the dispenser 5, where one part, passing through the calibrated diaphragm 19, is mixed with the foam concentrate in a predetermined proportion, and the other part fills the reservoir, thereby displacing the foam concentrate into the pipeline leading to the dispenser 5.

The liquid foam concentrate, after passing through a calibrated hole 19, which determines its concentration, enters the main water duct of the dispenser 5. As a result, a foamy water solution with a constant concentration is formed in the dispenser.

A flow meter 18 is installed on the foam concentrate pipeline, which allows you to determine the amount of foam concentrate remaining in the internal membrane reservoir 16 (knowing the amount of foam concentrate injected and its consumption, you can determine the amount of foam concentrate in the inner membrane reservoir 16).

At the exit of the foam concentrate from the inner reservoir of the membrane 16, a control valve for the foam concentrate 17 with a strapping is installed, which prevents the exit of the foam concentrate in standby mode. The opening of the concentrate control valve is facilitated by the solenoid valve 24.

For repairs, the following is provided: a foam concentrate shutoff valve 3, a water shutoff valve 4, as well as a dispenser drain valve 11, a water drain valve 13, a drain valve for a foam concentrate level indicator 14.

To protect against excessive pressure caused by thermal expansion of the foam concentrate and water inside the tank, a safety valve 8, the so-called thermal valve, is installed.

A valve controlled by a solenoid 28 activated by alternating electric current or a pulse of direct current, which opens or closes the valve, is installed on the foam solution supply line.

Dispenser 5 is a component of the tank that controls the ratio of foam to water flow. Due to the reduced cross section, the flow of water through the dispenser 5 creates a difference between the pressure of the foam concentrate in the inner reservoir of the membrane 16 and the water pressure inside the dispenser 5 at the place of the foam concentrate. This pressure difference, for a given dispenser 5, applies only to the flow of water through the dispenser 5. The hole inside the dispenser 5 controls the flow of foam into any water stream. Such a device allows you to maintain a constant degree of concentration over a large flow range and regardless of the working pressure of the tank.

Dispenser 5 works well within the recommended flow range, which is indicated on the nameplate of dispenser 5. If the flow is below the minimum recommended, the pressure difference will be insufficient to ensure a constant and required concentration. If the flow is higher than the maximum recommended, then the pressure drop supplied by the dispenser 5 may be too large to comply with the calculations of the foam system.

The injection area of the dispenser foam is contained in the pipe frame, which prevents the fittings that obstruct the flow of the system (T-joints, elbows, valves, filters, etc.) from being too close to it. This is necessary in order to create turbulence of these fittings so small that they do not affect the accuracy of dosing.

For large diameter lines, the installer / customer must provide at least 7 nominal diameters up and 5 nominal diameters down from the riser of the injection area.

The flow meter 18 is a turbine liquid meter of the PTF and PNF types - designed to measure the volumetric flow rate and volume of liquids at operating temperature or to bring the measured volumetric flow rate and volume to a standard temperature (20 ° or 15 ° C), as well as with the ability to calculate the mass of liquid at predetermined known density of the measured fluid at standard temperature.

The principle of operation of the flow meter 18 is based on the non-contact conversion of the rotor speed of the turbine flow transducer into an electrical signal with a frequency proportional to the speed of rotation and, accordingly, the volumetric flow rate of the measured liquid, which is perceived by the input circuit of the IM2300 secondary device. The design of the turbine flow converter allows you to achieve stable metrological characteristics at fixed points. The secondary device IM 2300 calculates the values of the current flow rate and volume of liquid under operating conditions, approximates the calibration curve, converts them into visual information, accumulates the measured parameters in memory, transfers information to an automated data collection system.

Claims (1)

A metering tank, including a metal tank under pressure, inside of which there is a rubber membrane forming an additional internal tank, a metering device is connected from the outside to the tank body, which is connected to the main water supply pipe, which is equipped with a valve to reduce the pressure at the inlet inlet a pipeline attached to the tank body connects the dispenser with an inlet pipe to the water tank; at the outlet, the output pipe attached to the tank body is connected the dispenser with foam suction line for the foaming agent is drawn, to determine the volume of the used foaming agent, a flowmeter with a secondary device is provided on the supply line of the foaming agent to transmit a signal to a personal computer, a valve controlled by a solenoid is installed on the foam supply line.