RU30599U1 - Isothermal module for liquid carbon dioxide fire extinguishing system - Google Patents

Abstract

1. An isothermal module for liquid carbon dioxide of a fire extinguishing system, consisting of a horizontal type tank including an inner vessel, an automatic pressure maintaining device in the inner vessel, a locking and starting device that provides opening, closing and blocking the supply of liquid carbon dioxide from the tank to the pipeline, and control unit, characterized in that the device for automatically maintaining pressure in the inner vessel includes an electric heater, a refrigeration unit with an electric contact gauge with a sensing element connected to the control unit. 2. Isothermal module according to claim 1, characterized in that it further comprises at least one electric heater, one refrigeration unit with an evaporator and one electrical contact pressure gauge. The isothermal module according to claim 1, characterized in that the electric heater, the evaporator of the refrigeration unit and the sensing element of the electrical contact pressure gauge are mounted in the inner vessel.

Description

Isothermal module for liquid carbon dioxide

fire extinguishing systems

The utility model relates to cryogenic equipment, namely, to isothermal tanks designed for outdoor storage of carbon dioxide (CO2) in a liquid state at low (up to 2.1 MPa) pressure and its supply during fire extinguishing of Class A, B, C, and also when extinguishing fires when igniting electrical equipment that is energized, as part of gas fire extinguishing installations, by volumetric or local methods.

Various types of isothermal modules for storing liquid carbon dioxide are known. The main disadvantage of all known high-pressure gas fire extinguishing modules is that they are installed only indoors, since they usually have complex and bulky additional equipment for regulating pressure or temperature (not allowing it to be placed outside the building), or they do not have the means to maintain the required pressure inside the module when the outside temperature changes. The placement of isothermal tanks with similar equipment in the premises leads to additional costs.

IPC7 A62C 5/00; F17C 5/00, 7/00,

9/00

as the closest analogue, the technical decision was made according to the patent of the Russian Federation No. 2146027 C1, dated 02.27.2000, from which an isothermal module for liquid carbon dioxide is known, consisting of a horizontal type tank including an internal vessel, an automatic pressure maintaining device in the internal vessel, a locking and starting device providing opening, closing and blocking of liquid carbon dioxide supply from the tank to the pipeline, and a control unit.

The technical problem underlying the creation of the proposed solution was to reduce the cost of fire protection by gas fire extinguishing facilities with a volume of over 500 m1

The problem is solved by a device made in accordance with the features of the formula of the proposed utility model, according to which the isothermal module for liquid carbon dioxide consists of a reservoir, mainly of a horizontal type, including an inner vessel, a device for automatically maintaining pressure in the inner vessel, a locking and starting device, providing opening, closing and blocking the supply of liquid carbon dioxide from the tank to the pipeline, and the control unit, while the device vtomaticheskogo maintain the pressure in the inner vessel includes a heater vessel,

mainly a tubular, refrigeration unit with an evaporator, mainly a compressor, and an electric contact pressure gauge with a sensing element connected to the control unit. At the same time, the electric heater, the evaporator of the refrigeration unit and the sensitive element of the electrical contact pressure gauge are mounted in the inner vessel of the isothermal module. It is advisable to duplicate the heater, refrigeration units with evaporators and electrical contact pressure gauges, i.e. in double quantity, which will increase the reliability of the system as a whole.

The technical result is to create a modular installation for storing liquid carbon dioxide, which allows operation in a wide temperature range and allows for the extinguishing of large volumes of fires while reducing capital costs.

Unlike high-pressure gas fire extinguishing modules, which are installed only indoors, the proposed modules can be operated both indoors and outdoors, usually under a canopy, while they retain their functionality at ambient temperatures from -40 ° C to + 50 ° C. In addition, placing the tank outside the premises reduces the risk in the event of an emergency. This is achieved by installing the elements of the pressure maintenance device in the inner vessel of the tank.

An information search conducted by the applicant showed that the isothermal module is unknown from the prior art, characterized by a design of the device for automatically maintaining pressure in the inner vessel, comprising a heater, a refrigeration unit with an evaporator and an electric contact pressure gauge that are built into the inner vessel and, in addition, can be duplicated by identical devices. This circumstance allows us to argue that the claimed technical solution has novelty and it can be provided with legal protection as a utility model.

The proposed utility model is illustrated by drawings, on which:

in FIG. 1 - general view of the device;

figure 2 is a structural diagram of the proposed isothermal module.

The isothermal module for liquid carbon dioxide (MIZU) contains a horizontal reservoir 1, including an inner vessel 2. In addition, there is a device for automatically maintaining pressure in the inner vessel, consisting of 2 electric heaters 3 and 4 mounted in the inner vessel, for example, tubular, evaporators of refrigeration units 5 and 6 and two electrical contact pressure gauges 7 with sensitive elements 8 connected to the control unit 9. Lock-starting device (ZPU)

10 provides the opening, closing and blocking of the supply of liquid carbon dioxide from the tank 1 to the pipeline, through which the latter is sent to the room determined by the control system.

The following describes the operation of the proposed isothermal module for liquid carbon dioxide.

In the "standby mode, the pressure in the inner vessel 2 MIZHU should be within 2.1 MPa.

To maintain this pressure, heaters 3, 4 and evaporators of refrigeration units 5, 6 are used. In this case, the pressure in the vessel is controlled by two electrocontact manometers 7.

With increasing pressure, the signal from the pressure gauge 7 (i.e., a signal exceeding the set point for extremely high pressure) enters the control unit 8, which gives a signal to and turn on the first refrigeration unit 5. If the refrigeration unit 5 malfunctions, the second refrigeration unit 6 is turned on. 6. when the required pressure is reached, the signal supplied from the pressure gauge is removed and the refrigeration unit 5 or 6 is turned off. The presence of a second similar heater 4, a refrigeration unit 6 and an electric contact pressure gauge 7 is due to an increase in the reliability of the fire extinguishing system.

When the pressure decreases, the signal from the pressure gauge 7 (i.e., a signal lower in this case than the setpoint value for extremely low pressure) also enters the control unit 8, however, in this case

the latter gives a signal to turn on the first electric heater 3. If the first electric heater 3 fails, the second electric heater 4 is turned on. Upon reaching the required pressure, the signal supplied from the pressure gauge is removed and the heater is turned off.

In the “START” mode, the control unit 9 opens the locking and starting device 10 and monitors the set amount of liquid carbon dioxide supplied, while the control unit closes the ZPU by the signal of the corresponding channel. After closing the ZPU, the residual amount of liquid carbon dioxide in the MIZU is recorded and its value is checked for compliance with the minimum installation. If the comparison result is positive, the system goes into “standby mode, otherwise the signal“ FAULT.

Isothermal modules for liquid carbon dioxide can be manufactured with reservoir capacities of 3 to 25 m. Operating pressure range 1.95 ... 2.05 MPa. Overall dimensions of the tank: diameter from 1700 to 2400 mm and length from 3700 to 9300 mm. The maximum release time of 50% of the mass of CO2 is not more than 60 s. The mass of the tank without gas is from 2500 to 16000 kg.

The economic efficiency of MIZHU increases with the increase in the protected volume. In addition, as the practice of operating gas fire extinguishing installations based on high pressure modules shows, with the simultaneous installation of more than 40 modules increase

operating costs and reduced reliability of the installation as a whole.

Therefore, the use of MIZHU for the protection of rooms over 500 m increases the reliability of fire extinguishing systems and reduces the cost of fire protection of the facility.

During certification tests, it was found that in terms of the quality of thermal insulation (daily pressure increase) of an isothermal tank, the response time of a shut-off and starting device and the temperature range of operation (from -40 ° C to +50 C) MIZHU are superior to the best foreign analogues. Expanding the operating temperature range MIZHU in the direction of low temperatures to -40 0 allows you to install the latter in an open area (i.e. outside the building), which significantly reduces capital costs.

Claims (3)

1. An isothermal module for liquid carbon dioxide of a fire extinguishing system, consisting of a horizontal type tank including an inner vessel, an automatic pressure maintaining device in the inner vessel, a locking and starting device that provides opening, closing and blocking the supply of liquid carbon dioxide from the tank to the pipeline, and control unit, characterized in that the device for automatically maintaining pressure in the inner vessel includes an electric heater, a refrigeration unit with an aritel and an electric contact pressure gauge with a sensitive element connected to the control unit. 2. The isothermal module according to claim 1, characterized in that it further comprises at least one electric heater, one refrigeration unit with an evaporator and one electrical contact pressure gauge. 3. The isothermal module according to claim 1, characterized in that the electric heater, the evaporator of the refrigeration unit and the sensing element of the electrical contact pressure gauge are mounted in the inner vessel.