Jet fire extinguishing system and control method driven by liquid inert gas phase change energy

Abstract

The present application proposes a jet fire extinguishing system and control method driven by phase change energy of liquid inert gas, wherein the system includes: a liquid inert gas supply unit, multiple energy storage units, multiple pressure water tanks, a water supply system, a spray gun and a control system, wherein the multiple energy storage units all include a gas accumulator and a heat exchanger for heat exchange, and a first pressure measuring device is provided on the gas accumulator; the liquid inert gas supply unit is connected to the gas accumulator through a first pipe, and a first control valve is provided on the first pipe; the gas accumulator is connected to the pressure water tank through a second pipe, and a second control valve and a second pressure measuring device are provided on the second pipe; the water supply system is connected to the pressure water tank through a third pipe, and a third control valve is provided on the third pipe; the liquid outlet of the pressure water tank is connected to the spray gun through a fourth pipe, and a third pressure measuring device is provided on the pressure water tank, and a liquid level measuring device is provided in the pressure water tank, so as to realize long-distance and continuous water flow spraying.

Description

Technical Field

[0001] The present application relates to the technical field of fire extinguishing devices, and in particular to a jet fire extinguishing system driven by phase change energy of liquid inert gas and a control method thereof. Background Art

[0002] Currently, most remote fire-extinguishing devices are powered by water pumps, which are powered by gasoline engines. To achieve long-range spraying, these pumps often require high-powered motors, consuming significant amounts of fuel and making them uneconomical and unsustainable. Other technologies are also using gas-liquid mixing to extend spraying distance, where high-pressure gas is ejected along with the water flow. However, the energy consumed by the mixed fluid during two-phase flow is several times greater than that of single-phase flow, and the gas's kinetic energy is not fully transferred to the water flow, thus affecting spraying distance. Furthermore, the use of high-pressure gas cylinders cannot maintain sustained spraying for long periods of time due to rapid gas consumption. Summary of the Invention

[0003] The present application aims to solve one of the technical problems in the related art at least to a certain extent.

[0004] To this end, the first purpose of the present application is to propose a jet fire extinguishing system driven by the phase change energy of liquid inert gas to achieve large-flow, long-distance, and continuous water jetting.

[0005] The second object of the present application is to provide a control method for a jet fire extinguishing system driven by the phase change energy of liquid inert gas.

[0006] To achieve the above-mentioned objectives, an embodiment of the first aspect of the present application proposes a jet fire extinguishing system driven by phase change energy of liquid inert gas, comprising: a liquid inert gas supply unit, multiple energy storage units, multiple pressure water tanks, a water supply system, a spray gun and a control system, wherein the multiple energy storage units each include a gas accumulator and a heat exchanger for heat exchange, and the gas accumulator is provided with a first pressure measuring device; the liquid inert gas supply unit is connected to the first opening of the gas accumulator through a first pipe, and the first pipe is provided with a first control valve; the second opening of the gas accumulator is connected to the pressure water tank through a second pipe, and the second pipe is provided with a second control valve and a second pressure measuring device; the water supply system is connected to the liquid inlet of the pressure water tank through a third pipe, and the third pipe is provided with a third control valve; the liquid outlet of the pressure water tank is connected to the spray gun through a fourth pipe, and the pressure water tank is provided with a third pressure measuring device, and a liquid level measuring device is provided in the pressure water tank;

[0007] A fourth control valve is provided on the fourth pipeline, and the first control valve, the second control valve, the third control valve, the fourth control valve, the first pressure measuring device, the second pressure measuring device, the third pressure measuring device and the liquid level measuring device are all connected to the control system.

[0008] In some implementations, an outer wall of the gas accumulator conforms to an outer wall of the heat exchanger.

[0009] In some implementations, the first pipeline includes a first main pipeline and multiple first branch pipelines connected thereto, the first main pipeline is connected to the liquid inert gas supply unit, and the multiple first branch pipelines are respectively connected to the first openings of the gas accumulators of the multiple energy storage units. The multiple first branch pipelines are all provided with the first control valve, which includes a gas one-way valve and a low-temperature supply valve; a pressure relief valve is also installed on the gas accumulator.

[0010] In some implementations, the second control valve includes a plurality of high-pressure valves, a pressure reducing valve, and a gas selection valve, the second pipeline includes a plurality of second upper branch pipelines, a second main pipeline, and a plurality of second lower branch pipelines, one end of the plurality of second upper branch pipelines are respectively connected to the second openings of the gas accumulators of the plurality of energy storage units, the other ends of the plurality of second upper branch pipelines are respectively connected to the second main pipeline, the plurality of high-pressure valves are respectively arranged on the plurality of second upper branch pipelines; one end of the plurality of second lower branch pipelines are respectively connected to the second main pipeline through the gas selection valve, the other ends of the plurality of second lower branch pipelines are respectively connected to the plurality of pressure water tanks, the pressure reducing valve and the second pressure measuring device are both arranged on the second main pipeline.

[0011] In some implementations, the third control valve is a water injection selection valve, the third pipeline includes a third main pipeline and multiple third branch pipelines, one end of the third main pipeline is connected to one end of the multiple third branch pipelines through the water injection selection valve, the other end of the third main pipeline is connected to the water supply system, and the other ends of the multiple third branch pipelines are respectively connected to the liquid inlets of the multiple pressure water tanks.

[0012] In some implementations, the fourth control valve is an injection selection valve, the fourth pipeline includes a fourth main pipeline and multiple fourth branch pipelines, one end of the fourth main pipeline is connected to one end of the multiple fourth branch pipelines through the injection selection valve, the other end of the fourth main pipeline is connected to the spray gun, and the other ends of the multiple fourth branch pipelines are respectively connected to the liquid outlets of the multiple pressure water tanks.

[0013] To achieve the above objectives, a second embodiment of the present application provides a method for controlling a jet fire extinguishing system driven by liquid inert gas phase change energy. The jet fire extinguishing system driven by liquid inert gas phase change energy is the jet fire extinguishing system driven by liquid inert gas phase change energy described in the first aspect. The method includes:

[0014] According to the pressure value collected by the second pressure measuring device, by controlling the first control valve and the second control valve, the multiple energy storage units provide high-pressure gas to the pressure water tank currently rotating among the multiple pressure water tanks in a rotational working mode;

[0015] According to the liquid level value collected by the liquid level measuring device in the currently rotating pressure water tank, the third control valve and the fourth control valve are controlled so that the multiple pressure water tanks provide high-pressure water to the spray gun in a rotating working mode.

[0016] In some implementations, based on the pressure value collected by the second pressure measuring device, the first control valve and the second control valve are controlled to enable the multiple energy storage units to provide high-pressure gas to the currently rotated pressure water tank among the multiple pressure water tanks in a rotational working mode; including:

[0017] By controlling the first control valve, the liquid inert gas supply unit provides liquid inert gas to the plurality of energy storage units; and stops supplying liquid when the pressure in the gas accumulator of the energy storage unit reaches a first predetermined pressure value;

[0018] When the pressure value in the gas accumulator of the energy storage unit currently rotating rises to a first predetermined pressure value, the second control valve is controlled to allow the high-pressure gas of the energy storage unit currently rotating to flow into the second pipeline;

[0019] When the pressure value of the gas accumulator in the current rotation drops to a second predetermined pressure value, a new energy storage unit in the current rotation is determined from the multiple energy storage units according to the first rule, and the second control valve is controlled so that the high-pressure gas of the new energy storage unit in the current rotation flows into the second pipeline; at the same time, the first control valve is controlled so that the liquid inert gas supply unit supplies liquid to the gas accumulator whose pressure value drops to the second predetermined pressure value.

[0020] In some implementations, the step of controlling the third control valve and the fourth control valve based on the liquid level value collected by the liquid level measuring device in the currently rotating pressure water tank so that the multiple pressure water tanks provide high-pressure water to the spray gun in a rotational working mode includes:

[0021] By controlling the third control valve, the water supply system is enabled to supply water to the plurality of pressure water tanks in turn, and the water supply is stopped when the water level of the pressure water tank reaches a first predetermined water level;

[0022] When the pressure in the currently rotating pressure water tank rises to a third predetermined pressure value, the spray gun is caused to spray water by controlling the fourth control valve;

[0023] When the water level in the pressure water tank of the current rotation drops to the second predetermined water level, a new pressure water tank of the current rotation is determined from the multiple pressure water tanks according to the second rule, and the high-pressure gas in the second pipeline is controlled to supply gas to the new pressure water tank of the current rotation by controlling the second control valve; at the same time, the new pressure water tank of the current rotation is controlled to provide high-pressure water to the spray gun by controlling the fourth control valve; and the water supply system is controlled to replenish water to the pressure water tank whose water level drops to the second predetermined water level by controlling the third control valve.

[0024] In some implementations, the number of the plurality of pressure water tanks is greater than 2, and there are multiple pressure water tanks working simultaneously in the rotation.

[0025] The present application provides a jet fire extinguishing system and control method that utilizes liquid inert gas phase change energy to drive a pressure water tank. The system provides high-pressure gas to the pressure water tank through a liquid inert gas supply unit and an energy storage unit, and can fully utilize the high pressure generated by the phase change of the liquid inert gas to drive the water flow to achieve long-distance spraying. At the same time, through the rotation working mode of multiple energy storage units, continuous pressure supply to the pressure water tank is achieved. In addition, by adopting the rotation working mode of multiple pressure water tanks, uninterrupted water spraying is achieved.

[0026] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0028] Figure 1 A schematic diagram of the structure of a jet fire extinguishing system driven by liquid inert gas phase change energy provided in an embodiment of the present application;

[0029] Figure 2 A flow chart of a control method for a jet fire extinguishing system driven by liquid inert gas phase change energy provided in an embodiment of the present application. DETAILED DESCRIPTION

[0030] The following describes in detail embodiments of the present application, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0031] The following describes a jet fire extinguishing system and a control method driven by liquid inert gas phase change energy according to an embodiment of the present application with reference to the accompanying drawings.

[0032] Figure 1 This is a schematic diagram of the structure of a jet fire extinguishing system driven by liquid inert gas phase change energy provided in an embodiment of the present application. Figure 1 As shown, the jet fire extinguishing system driven by the phase change energy of liquid inert gas may include: a liquid inert gas supply unit 1, multiple energy storage units 2, multiple pressure water tanks 3, a water supply system 4, a spray gun 5 and a control system (not shown in the figure).

[0033] Among them, multiple energy storage units 2 each include a gas accumulator 21 and a heat exchanger 22 for heat exchange, and a first pressure measuring device is provided on the gas accumulator 21; the liquid inert gas supply unit 1 is connected to the first opening of the gas accumulator 21 through a first pipe, and the first pipe is provided with a first control valve; the second opening of the gas accumulator 21 is connected to the pressure water tank 3 through a second pipe, and the second pipe is provided with a second control valve and a second pressure measuring device; the water supply system 4 is connected to the liquid inlet of the pressure water tank 3 through a third pipe, and the third pipe is provided with a third control valve; the liquid outlet of the pressure water tank 3 is connected to the spray gun 5 through a fourth pipe, and the pressure water tank 3 is provided with a third pressure measuring device, and a liquid level measuring device is provided in the pressure water tank 3;

[0034] It can be understood that because the gasification phase change and pressurization of the liquid inert gas in the gas accumulator 21 is a continuous process, the present invention provides a continuous supply of high-pressure gas to the pressure water tank 3 by providing multiple energy storage units 2 in rotation. Furthermore, the present invention achieves continuous spraying of firefighting water through the rotation of multiple pressure water tanks 3.

[0035] A fourth control valve is provided on the fourth pipeline, and the first control valve, the second control valve, the third control valve, the fourth control valve, the first pressure measuring device, the second pressure measuring device, the third pressure measuring device and the liquid level measuring device are all connected to the control system.

[0036] Thus, liquid inert gas can be stored through the liquid inert gas supply unit 1 to provide liquid inert gas supply to multiple energy storage units 2, and the supply amount of liquid inert gas can be precisely controlled by the first control valve. By exchanging heat with the heat exchanger 22, the liquid inert gas entering the gas accumulator 21 is vaporized and expanded to produce high-pressure inert gas. The gas pressure in the second pipeline is collected by the second pressure measuring device, and the second control valve is controlled according to the pressure value, so that the multiple energy storage units 2 can continuously supply high-pressure gas to the currently operating pressure water tank 3 in a rotating working mode. Water is supplied to the pressure water tank 3 through the water supply system 4, and according to the liquid level information collected by the liquid level measuring device of the pressure water tank 3, the multiple pressure water tanks 3 can continuously supply water to the spray gun 5 in a rotating working mode.

[0037] For example, the liquid inert gas supply unit 1 can be a liquid inert gas storage tank, which operates in a self-pressurizing mode and generates supply pressure through self-pressurization. The first, second, and third pressure measuring devices are all pressure gauges. The multiple pressure water tanks 3 include two pressure water tanks 3, namely a primary and a secondary pressure water tank 3. The alternating operation of the primary and secondary pressure water tanks 3 enables continuous spraying of firefighting water. The water supply system 4 can be connected to a fire hydrant or provided by other water pumps. The control system is a PLC system.

[0038] The embodiment of the present application utilizes a jet fire extinguishing system driven by the phase change energy of liquid inert gas. By providing high-pressure gas to a pressure water tank through a liquid inert gas supply unit and an energy storage unit, the system can fully utilize the high pressure generated by the phase change of the liquid inert gas to drive the water flow to achieve long-distance jetting. At the same time, through the rotation working mode of multiple energy storage units, continuous pressure supply to the pressure water tank is achieved. In addition, by adopting the rotation working mode of multiple pressure water tanks, uninterrupted water jetting is achieved. Ultimately, large-flow, long-distance, continuous water jetting is achieved.

[0039] In some embodiments, the outer wall of the gas accumulator 21 is attached to the outer wall of the heat exchanger 22. Thus, the gas accumulator 21 and the heat exchanger 22 are physically attached to each other and exchange heat.

[0040] In some embodiments, the first pipeline includes a first main pipeline and multiple first branch pipelines connected to it, the first main pipeline is connected to the liquid inert gas supply unit 1, and the multiple first branch pipelines are respectively connected to the first openings of the gas accumulators 21 of the multiple energy storage units 2. The multiple first branch pipelines are all provided with first control valves, and the first control valves include a gas one-way valve 24 and a low-temperature supply valve 23; a pressure relief valve 26 is also installed on the gas accumulator 21.

[0041] As a result, the liquid inert gas supply unit 1 maintains a certain pressure. Based on the pressure value collected by the first pressure measuring device of each gas accumulator 21 and the pressure value of the second pipeline collected by the second pressure measuring device, the liquid inert gas supply unit 1 controls the supply or cessation of gas supply to the corresponding energy storage unit 2 through the gas check valve 24 and the cryogenic supply valve 23 on each first branch pipeline. After the pressure in the currently rotating gas accumulator 21 drops to a certain value, the high-pressure valve 25 closes and the residual pressure in the gas accumulator 21 is vented through the pressure relief valve 26. The corresponding cryogenic supply valve 23 is then opened, allowing the liquid inert gas supply unit 1 to supply liquid to the gas accumulator 21. The gas check valve 24 prevents the high-pressure gas in the energy storage unit 2 from flowing back into the liquid inert gas supply unit 1.

[0042] In some embodiments, the second control valve includes multiple high-pressure valves 25, a pressure reducing valve 6 and a gas selection valve 7, the second pipeline includes multiple second upper branch pipelines, a second main pipeline and multiple second lower branch pipelines, one end of the multiple second upper branch pipelines are respectively connected to the second openings of the gas accumulators 21 of the multiple energy storage units 2, the other ends of the multiple second upper branch pipelines are all connected to the second main pipeline, and the multiple high-pressure valves 25 are respectively arranged on the multiple second upper branch pipelines; one end of the multiple second lower branch pipelines are all connected to the second main pipeline through the gas selection valve 7, and the other ends of the multiple second lower branch pipelines are respectively connected to the multiple pressure water tanks 3, and the pressure reducing valve 6 and the second pressure measuring device are both arranged on the second main pipeline.

[0043] Therefore, the gas accumulator 21 can be controlled to supply gas to the second main pipeline through the high-pressure valve 25 according to the pressure value inside the gas accumulator 21 collected by the first pressure measuring device; the main pipeline pressure on the second main pipeline collected by the second pressure measuring device is used to realize the rotation of the energy storage unit 2; the high-pressure inert gas in the second main pipeline is stabilized by the pressure reducing valve 6 and then pressurized by the gas selection valve 7 to the pressure water tank 3 currently rotating.

[0044] In some embodiments, the third control valve is a water injection selection valve 8, the third pipeline includes a third main pipeline and multiple third branch pipelines, one end of the third main pipeline is connected to one end of the multiple third branch pipelines through the water injection selection valve 8, the other end of the third main pipeline is connected to the water supply system 4, and the other ends of the multiple third branch pipelines are respectively connected to the liquid inlets of multiple pressure water tanks 3.

[0045] Thus, the water supply system 4 can select which one or several pressurized water tanks 3 are currently supplying water to through the water injection selection valve 8 according to the liquid level information collected by the liquid level measuring device in the pressurized water tank 3 .

[0046] In some embodiments, the fourth control valve is an injection selection valve 9, the fourth pipeline includes a fourth main pipeline and multiple fourth branch pipelines, one end of the fourth main pipeline is connected to one end of multiple fourth branch pipelines through the injection selection valve 9, the other end of the fourth main pipeline is connected to the spray gun 5, and the other ends of the multiple fourth branch pipelines are respectively connected to the liquid outlets of multiple pressure water tanks 3.

[0047] Therefore, the pressure value in the pressure tank 3 collected by the third pressure measuring device of each pressure tank 3 can be used to control the pressure tank 3 to supply water to the spray gun 5 through the injection selection valve 9.

[0048] Exemplarily, the working process of the jet fire extinguishing system driven by the phase change energy of liquid inert gas includes the following:

[0049] The liquid inert gas in the liquid inert gas supply unit 1 passes through the low-temperature supply valve 23 and the gas one-way valve 24 of each energy storage unit 2 and enters the gas accumulator 21 of each energy storage unit 2. Then, the liquid inert gas is gasified and expanded under the action of the heat exchanger 22 to generate high-pressure inert gas.

[0050] When the pressure in the currently rotating gas accumulator 21 reaches a first predetermined pressure value, the corresponding high-pressure valve 25 opens, allowing the high-pressure inert gas to flow into the second main pipeline (i.e., the gas main pipeline). The high-pressure inert gas is stabilized by the pressure reducing valve 6 and then passes through the gas selector valve 7 to pressurize the currently rotating pressure water tank 3. When the pressure in the pressure water tank 3 reaches a third predetermined pressure value, the spray selector valve 9 opens, and high-pressure water is sprayed from the spray gun 5.

[0051] As the high pressure of the currently rotating energy storage unit 2 gradually decreases along with the pressure in the second main pipeline, the corresponding high-pressure valve 25 closes, the cryogenic supply valve 23 opens, and the liquid inert gas supply unit 1 injects liquid inert gas into that energy storage unit 2, repeating the pressurization process. Simultaneously, the high-pressure valve 25 of the next rotating energy storage unit 2 opens, continuing to pressurize the second main pipeline. By alternating pressure accumulation and pressure relief in multiple energy storage units 2, a stable high pressure is maintained in the second main pipeline.

[0052] After the pressure water tank 3 in the current rotation sprays for a period of time and its water level drops to the second predetermined water level, the gas selector valve 7 is controlled to operate, transferring the high-pressure gas in the second main pipeline to the pressure water tank 3 in the current rotation. Simultaneously, the spray selector valve 9 is switched to the line of this pressure water tank 3, and water is supplied from this auxiliary pressure water tank 3. At this time, the water supply system 4 replenishes water to the pressure water tank 3 in the previous rotation through the water injection selector valve 8.

[0053] Based on the above embodiments, the present application also provides a method for controlling a jet fire extinguishing system driven by liquid inert gas phase change energy, the method comprising:

[0054] In step S101, based on the pressure value collected by the second pressure measuring device, the first control valve and the second control valve are controlled to enable the multiple energy storage units to provide high-pressure gas to the currently rotating pressure water tank among the multiple pressure water tanks in a rotational working mode.

[0055] Step S102, according to the liquid level value collected by the liquid level measuring device in the currently rotating pressure water tank, the third control valve and the fourth control valve are controlled to enable multiple pressure water tanks to provide high-pressure water to the spray gun in a rotating working mode.

[0056] In some embodiments, based on the pressure value collected by the second pressure measuring device, by controlling the first control valve and the second control valve, multiple energy storage units are caused to provide high-pressure gas to the currently rotating pressure water tank among the multiple pressure water tanks in a rotational working mode; including:

[0057] By controlling the first control valve, the liquid inert gas supply unit provides liquid inert gas to the multiple energy storage units; and stops supplying liquid when the pressure in the gas accumulator of the energy storage unit reaches a first predetermined pressure value.

[0058] When the pressure value in the gas accumulator of the energy storage unit currently rotating rises to the first predetermined pressure value, the second control valve is controlled to allow the high-pressure gas of the energy storage unit currently rotating to flow into the second pipeline.

[0059] When the pressure value of the gas accumulator currently rotating drops to a second predetermined pressure value, a new energy storage unit currently rotating is determined from the multiple energy storage units according to the first rule, and the second control valve is controlled so that the high-pressure gas of the new energy storage unit currently rotating flows into the second pipeline; at the same time, the first control valve is controlled so that the liquid inert gas supply unit supplies liquid to the gas accumulator whose pressure value drops to the second predetermined pressure value.

[0060] In some embodiments, based on the liquid level value collected by the liquid level measuring device in the currently rotating pressure water tank, the third control valve and the fourth control valve are controlled to enable multiple pressure water tanks to provide high-pressure water to the spray gun in a rotating working mode; including:

[0061] By controlling the third control valve, the water supply system supplies water to the multiple pressure water tanks in turn, and stops supplying water when the water level line of the pressure water tank reaches the first predetermined water level line.

[0062] When the pressure in the pressure water tank of the current rotation rises to the third predetermined pressure value, the spray gun is made to spray water by controlling the fourth control valve.

[0063] When the water level in the currently rotating pressure water tank drops to the second predetermined water level, a new currently rotating pressure water tank is determined from multiple pressure water tanks according to the second rule, and the high-pressure gas in the second pipeline is controlled to supply gas to the new currently rotating pressure water tank by controlling the second control valve; at the same time, the new currently rotating pressure water tank is controlled to provide high-pressure water to the spray gun by controlling the fourth control valve; and the water supply system is controlled to replenish water to the pressure water tank whose water level has dropped to the second predetermined water level by controlling the third control valve.

[0064] In some embodiments, the number of the plurality of pressure water tanks is greater than 2, and there are multiple pressure water tanks working simultaneously in the rotation.

[0065] It can be understood that when using two pressure water tanks, the switching of the water supply line may cause changes in the state of the jet water flow. Therefore, the number of pressure water tanks can be increased, and the impact of line change and water replenishment on the water flow state can be reduced by having multiple pressure water tanks working simultaneously.

[0066] In the descriptions of the foregoing embodiments, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are mutually inconsistent.

[0067] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0068] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, segment or portion of code comprising one or more executable instructions for implementing the steps of a custom logical function or process, and the scope of the preferred embodiments of the present application includes alternative implementations in which functions may be performed out of the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by those skilled in the art to which the embodiments of the present application belong.

[0069] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A jet fire extinguishing system driven by the phase change energy of liquid inert gas, characterized in that: include: A liquid inert gas supply unit, multiple energy storage units, multiple pressure water tanks, a water supply system, a spray gun, and a control system. The multiple energy storage units each include a gas accumulator and a heat exchanger for heat exchange, and the gas accumulator is provided with a first pressure measuring device. The liquid inert gas supply unit is connected to the first opening of the gas accumulator via a first pipe, and the first pipe is provided with a first control valve. The second opening of the gas accumulator is connected to the pressure water tank via a second pipe, and the second pipe is provided with a second control valve and a second pressure measuring device. The water supply system is connected to the liquid inlet of the pressure water tank via a third pipe, and the third pipe is provided with a third control valve. The liquid outlet of the pressure water tank is connected to the spray gun via a fourth pipe, and the pressure water tank is provided with a third pressure measuring device. A liquid level measuring device is provided in the pressure water tank. The fourth pipeline is provided with a fourth control valve, and the first control valve, the second control valve, the third control valve, the fourth control valve, the first pressure measuring device, the second pressure measuring device, the third pressure measuring device and the liquid level measuring device are all connected to the control system; The second control valve includes a plurality of high-pressure valves, a pressure reducing valve and a gas selection valve. The second pipeline includes a plurality of second upper branch pipelines, a second main pipeline and a plurality of second lower branch pipelines. One end of the plurality of second upper branch pipelines is respectively connected to the second opening of the gas accumulator of the plurality of energy storage units, and the other end of the plurality of second upper branch pipelines is connected to the second main pipeline. The plurality of high-pressure valves are respectively arranged on the plurality of second upper branch pipelines; one end of the plurality of second lower branch pipelines is connected to the second main pipeline through the gas selection valve, and the other end of the plurality of second lower branch pipelines is respectively connected to the plurality of pressure water tanks. The pressure reducing valve and the second pressure measuring device are both arranged on the second main pipeline.

2. The jet fire extinguishing system driven by liquid inert gas phase change energy according to claim 1, characterized in that: The outer wall of the gas accumulator is in contact with the outer wall of the heat exchanger.

3. The jet fire extinguishing system driven by liquid inert gas phase change energy according to claim 1, characterized in that: The first pipeline includes a first main pipeline and multiple first branch pipelines connected thereto, the first main pipeline is connected to the liquid inert gas supply unit, and the multiple first branch pipelines are respectively connected to the first openings of the gas accumulators of the multiple energy storage units. The multiple first branch pipelines are all provided with the first control valve, which includes a gas one-way valve and a low-temperature supply valve; the gas accumulator is also equipped with a pressure relief valve.

4. The jet fire extinguishing system driven by liquid inert gas phase change energy according to claim 1, characterized in that: The third control valve is a water injection selection valve, and the third pipeline includes a third main pipeline and multiple third branch pipelines. One end of the third main pipeline is connected to one end of the multiple third branch pipelines through the water injection selection valve, and the other end of the third main pipeline is connected to the water supply system, and the other ends of the multiple third branch pipelines are respectively connected to the liquid inlets of the multiple pressure water tanks.

5. The jet fire extinguishing system driven by liquid inert gas phase change energy according to claim 1, characterized in that: The fourth control valve is an injection selection valve, and the fourth pipeline includes a fourth main pipeline and multiple fourth branch pipelines. One end of the fourth main pipeline is connected to one end of the multiple fourth branch pipelines through the injection selection valve, and the other end of the fourth main pipeline is connected to the spray gun, and the other ends of the multiple fourth branch pipelines are respectively connected to the liquid outlets of the multiple pressure water tanks.

6. A control method for a jet fire extinguishing system driven by phase change energy of liquid inert gas, characterized in that: The jet fire extinguishing system driven by the phase change energy of liquid inert gas is the jet fire extinguishing system driven by the phase change energy of liquid inert gas according to any one of claims 1 to 5, and the method comprises: According to the pressure value collected by the second pressure measuring device, by controlling the first control valve and the second control valve, the multiple energy storage units provide high-pressure gas to the pressure water tank currently rotating among the multiple pressure water tanks in a rotational working mode; According to the liquid level value collected by the liquid level measuring device in the currently rotating pressure water tank, the third control valve and the fourth control valve are controlled so that the multiple pressure water tanks provide high-pressure water to the spray gun in a rotating working mode.

7. The control method according to claim 6, characterized in that: The method comprises: controlling the first control valve and the second control valve according to the pressure value collected by the second pressure measuring device, so that the multiple energy storage units provide high-pressure gas to the currently rotating pressure water tank among the multiple pressure water tanks in a rotational working mode; By controlling the first control valve, the liquid inert gas supply unit provides liquid inert gas to the plurality of energy storage units; and stops supplying liquid when the pressure in the gas accumulator of the energy storage unit reaches a first predetermined pressure value; When the pressure value in the gas accumulator of the energy storage unit currently rotating rises to a first predetermined pressure value, the second control valve is controlled to allow the high-pressure gas of the energy storage unit currently rotating to flow into the second pipeline; When the pressure value of the gas accumulator in the current rotation drops to a second predetermined pressure value, a new energy storage unit in the current rotation is determined from the multiple energy storage units according to the first rule, and the second control valve is controlled so that the high-pressure gas of the new energy storage unit in the current rotation flows into the second pipeline; at the same time, the first control valve is controlled so that the liquid inert gas supply unit supplies liquid to the gas accumulator whose pressure value drops to the second predetermined pressure value.

8. The control method according to claim 7, characterized in that: The method comprises: controlling the third control valve and the fourth control valve according to the liquid level value collected by the liquid level measuring device in the currently rotating pressure water tank, so that the multiple pressure water tanks can provide high-pressure water to the spray gun in a rotational working mode; By controlling the third control valve, the water supply system is enabled to supply water to the plurality of pressure water tanks in turn, and the water supply is stopped when the water level of the pressure water tank reaches a first predetermined water level; When the pressure in the currently rotating pressure water tank rises to a third predetermined pressure value, the spray gun is caused to spray water by controlling the fourth control valve; When the water level in the currently rotating pressure water tank drops to a second predetermined water level, a new currently rotating pressure water tank is determined from the multiple pressure water tanks according to a second rule, and the high-pressure gas in the second pipeline is controlled to supply gas to the new currently rotating pressure water tank by controlling the second control valve; at the same time, the new currently rotating pressure water tank is controlled to provide high-pressure water to the spray gun by controlling the fourth control valve; and the water supply system is controlled to replenish water to the pressure water tank whose water level drops to the second predetermined water level by controlling the third control valve.

9. The control method according to claim 8, characterized in that: The number of the plurality of pressure water tanks is greater than 2, and there are a plurality of pressure water tanks working simultaneously in the rotation.

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