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

Abstract

The invention provides a jet fire extinguishing system driven by liquid inert gas phase change energy and a control method.The system comprises a liquid inert gas supply unit, a plurality of energy storage units, a plurality of pressure-bearing water tanks, a water supply system, a spray gun and a control system, and each energy storage unit comprises a gas energy accumulator and a heat exchanger for heat exchange; a first pressure measuring device is arranged on the gas energy accumulator; the liquid inert gas supply unit is communicated with the gas energy accumulator through a first pipeline, and a first control valve is arranged on the first pipeline; the gas energy accumulator is communicated with the pressure-bearing water tank through a second pipeline, and a second control valve and a second pressure measuring device are arranged on the second pipeline; the water supply system is communicated with the pressure-bearing water tank through a third pipeline, and a third control valve is arranged on the third pipeline; a liquid outlet of the pressure-bearing water tank is communicated with the spray gun through a fourth pipeline, a third pressure measuring device is arranged on the pressure-bearing water tank, a liquid level measuring device is arranged in the pressure-bearing water tank, and long-distance and continuous water flow spraying can be achieved.

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 long-distance fire extinguishing devices are driven by water pumps, which are powered by gasoline engines. To achieve long-distance spraying, the water pumps often need to use high-power motors, which consume a lot of oil and have poor economy and sustainability. There is also a technology that extends the spraying distance by mixing gas and liquid. High-pressure gas is sprayed out with the water flow, but the energy consumed by the mixed fluid in the two-phase flow process is several times that of the single-phase flow. The kinetic energy of the gas cannot fully act on the water flow, thus affecting the spraying distance. In addition, the method of using high-pressure gas cylinders cannot maintain long-term continuous spraying due to the rapid consumption of gas. Summary of the invention

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

[0004] To this end, the first object 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 phase change energy of liquid inert gas.

[0006] To achieve the above-mentioned purpose, the first embodiment 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, a plurality of energy storage units, a plurality of pressure water tanks, a water supply system, a spray gun and a control system, wherein the plurality of 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 pipeline, and the first pipeline is provided with a first control valve; the second opening of the gas accumulator is connected to the pressure water tank through a second pipeline, and the second pipeline 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 pipeline, and the third pipeline is provided with a third control valve; the liquid outlet of the pressure water tank is connected to the spray gun through a fourth pipeline, 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 fits against an outer wall of the heat exchanger.

[0009] In some implementations, the first pipeline includes a first main pipeline and a plurality of first branch pipelines connected thereto, the first main pipeline is connected to the liquid inert gas supply unit, the plurality of first branch pipelines are respectively connected to the first openings of the gas accumulators of the plurality of energy storage units, the plurality of first branch pipelines are each provided with the first control valve, the first control valve including 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 ends 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 ends 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-mentioned purpose, the second embodiment of the present application proposes a control method for a jet fire extinguishing system driven by liquid inert gas phase change energy, wherein 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 as described in the first aspect, and the method comprises:

[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 rotation 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, 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 currently rotating pressure water tank among the multiple pressure water tanks in a rotation 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 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 high-pressure gas of the new energy storage unit currently rotating is made to flow into the second pipeline by controlling the second control valve; at the same time, the first control valve is controlled to make the liquid inert gas supply unit supply 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 rotating working mode comprises:

[0021] 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 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 made to spray water by controlling the fourth control valve;

[0023] 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 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 currently rotating pressure water tank by the second control valve; at the same time, the fourth control valve is controlled to enable the new currently rotating pressure water tank to provide high-pressure water to the spray gun; and the third control valve is controlled to enable the water supply system to replenish water for the pressure water tank whose water level drops to the second predetermined water level.

[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 driven by 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 high-pressure driven water flow generated by the phase change of the liquid inert gas can be fully utilized to realize 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 realized. In addition, by adopting the rotation working mode of multiple pressure water tanks, uninterrupted jetting of water flow is realized.

[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 the 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] Embodiments of the present application are described in detail below, and examples of the embodiments 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 The schematic diagram of the structure of a jet fire extinguishing system driven by liquid inert gas phase change energy provided in the embodiment of the present application is shown in FIG. 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, a plurality of energy storage units 2, a plurality of 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, the multiple energy storage units 2 all 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 pipeline, and a first control valve is provided on the first pipeline; the second opening of the gas accumulator 21 is connected to the pressure water tank 3 through a second pipeline, and a second control valve and a second pressure measuring device are provided on the second pipeline; the water supply system 4 is connected to the liquid inlet of the pressure water tank 3 through a third pipeline, and a third control valve is provided on the third pipeline; the liquid outlet of the pressure water tank 3 is connected to the spray gun 5 through a fourth pipeline, and a third pressure measuring device is provided on the pressure water tank 3, and a liquid level measuring device is provided in the pressure water tank 3;

[0034] It can be understood that since the gasification phase change pressurization of the liquid inert gas in the gas accumulator 21 is a continuous process, the present invention provides a plurality of energy storage units 2 in rotation to provide continuous high-pressure gas for the pressure water tank 3. In addition, the present invention realizes continuous spraying of fire water by rotating the plurality of pressure water tanks 3.

[0035] A fourth control valve is arranged 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 accurately controlled by the first control valve. By exchanging heat with the heat exchanger 22, the liquid inert gas entering the gas accumulator 21 is gasified 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 continue to provide high-pressure gas to the currently working 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 continue to supply water to the spray gun 5 in a rotating working mode.

[0037] Exemplarily, the liquid inert gas supply unit 1 can select a liquid inert gas storage tank, which is in a self-pressurization working mode and generates supply pressure by self-pressurization. The first pressure measuring device, the second pressure measuring device and the third pressure measuring device are all pressure gauges, and the multiple pressure water tanks 3 include two pressure water tanks 3, namely the main and auxiliary pressure water tanks 3, and the continuous spraying of fire water is achieved by alternating the main and auxiliary pressure water tanks 3. Among them, the water supply system 4 can be connected to a fire hydrant or provide water supply through other water pumps. The control system is a PLC system.

[0038] The embodiment of the present application utilizes the liquid inert gas phase change energy-driven jet fire extinguishing system, which provides high-pressure gas to the pressure water tank through the liquid inert gas supply unit and the 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 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; and 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 thereto, 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, and the multiple first branch pipelines are each provided with a first control valve, the first control valve including a gas check valve 24 and a low-temperature supply valve 23; a pressure relief valve 26 is also installed on the gas accumulator 21.

[0041] Therefore, the liquid inert gas supply unit 1 itself maintains a certain pressure. According to 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 liquid inert gas supply unit 1 to supply gas to the corresponding energy storage unit 2 or stop supplying gas through the gas check valve 24 and the low-temperature supply valve 23 on each first branch pipeline. After the pressure in the current rotating gas accumulator 21 drops to a certain value, the high-pressure valve 25 is closed, and the residual pressure in the gas accumulator 21 is emptied through the pressure relief valve 26, and then the corresponding low-temperature supply valve 23 is opened to allow the liquid inert gas supply unit 1 to supply liquid to the gas accumulator 21. The gas check valve 24 is used to prevent the high-pressure gas in the energy storage unit 2 from flowing back to 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 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 connected to the second main pipeline through the gas selection valve 7, 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 rotation of the energy storage unit 2 is realized by the main pipeline pressure on the second main pipeline collected by the second pressure measuring device; 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 an 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 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] Therefore, according to the liquid level information collected by the liquid level measuring device in the pressure water tank 3, the water injection selection valve 8 can be used to select which pressure water tank or tanks 3 the water supply system 4 is currently supplying water to.

[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 the 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 contents:

[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, and then gasifies and expands under the action of the heat exchanger 22 to generate high-pressure inert gas.

[0050] When the pressure in the gas accumulator 21 of the current rotation increases to the first predetermined pressure value, the corresponding high-pressure valve 25 opens to allow 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 pressurized by the gas selection valve 7 for the pressure-bearing water tank 3 of the current rotation. When the pressure in the pressure-bearing water tank 3 increases to the third predetermined pressure value, the injection selection valve 9 opens, and the high-pressure water is sprayed out by the spray gun 5.

[0051] When the high pressure of the currently rotating energy storage unit 2 gradually decreases with the pressure of the second main pipeline, the corresponding high pressure valve 25 is closed, the low temperature supply valve 23 is opened, and the liquid inert gas supply unit 1 injects liquid inert gas into the energy storage unit 2 to repeat the pressurization process; at the same time, the high pressure valve 25 of the next rotating energy storage unit 2 is opened to continuously pressurize the second main pipeline. Multiple energy storage units 2 can maintain a stable high pressure in the second main pipeline by alternately storing and releasing pressure.

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

[0053] On the basis of the above embodiments, the present application also provides a control method of a jet fire extinguishing system driven by liquid inert gas phase change energy, the method comprising:

[0054] Step S101, according to 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 provide high-pressure gas to the currently rotating pressure water tank among multiple pressure water tanks through a rotation 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, by controlling the third control valve and the fourth control valve, multiple pressure water tanks provide high-pressure water to the spray gun in a rotating working mode.

[0056] In some embodiments, according to 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 provide high-pressure gas to the currently rotating pressure water tank among multiple pressure water tanks in a rotating 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 high-pressure gas of the energy storage unit currently rotating flows into the second pipeline by controlling the second control valve.

[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 multiple energy storage units according to the first rule, and the high-pressure gas of the new energy storage unit currently rotating is allowed to flow into the second pipeline by controlling the second control valve; at the same time, the first control valve is controlled to allow the liquid inert gas supply unit to supply liquid to the gas accumulator whose pressure value drops to the second predetermined pressure value.

[0060] In some embodiments, according to the liquid level value collected by the liquid level measuring device in the currently rotating pressure water tank, by controlling the third control valve and the fourth control valve, multiple pressure water tanks 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 sprays 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 a plurality of pressure water tanks working simultaneously in the rotation.

[0065] It can be understood that when two pressure water tanks are used, switching of the water supply lines 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 description of the aforementioned embodiments, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means 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 representations 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, without contradiction.

[0067] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0068] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, fragment 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 not be performed in 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 technicians in the technical field 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 liquid inert gas phase change energy, characterized in that: include: A liquid inert gas supply unit, a plurality of energy storage units, a plurality of pressure water tanks, a water supply system, a spray gun and a control system, wherein the plurality of 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 a first opening of the gas accumulator through a first pipeline, and a first control valve is provided on the first pipeline; the second opening of the gas accumulator is connected to the pressure water tank through a second pipeline, and a second control valve and a second pressure measuring device are provided on the second pipeline; the water supply system is connected to a liquid inlet of the pressure water tank through a third pipeline, and a third control valve is provided on the third pipeline; the liquid outlet of the pressure water tank is connected to the spray gun through a fourth pipeline, 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; 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.

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 a plurality of first branch pipelines connected thereto, the first main pipeline is connected to the liquid inert gas supply unit, the plurality of first branch pipelines are respectively connected to the first openings of the gas accumulators of the plurality of energy storage units, the plurality of first branch pipelines are each provided with the first control valve, the first control valve includes a gas one-way valve and a low-temperature supply valve; a pressure relief valve is also installed on the gas accumulator.

4. The jet fire extinguishing system driven by liquid inert gas phase change energy according to claim 1, characterized in that: 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 ends 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 connected to the second main pipeline; the plurality of high-pressure valves are respectively arranged on the plurality of second upper branch pipelines; one ends 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.

5. 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.

6. 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, 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.

7. A control method for a jet fire extinguishing system driven by liquid inert gas phase change energy, 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 as claimed in any one of claims 1 to 6, 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 rotation 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.

8. The control method according to claim 7, characterized in that: The method of controlling the first control valve and the second control valve according to the pressure value collected by the second pressure measuring device enables 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 rotating working mode; comprising: 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 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 high-pressure gas of the new energy storage unit currently rotating is made to flow into the second pipeline by controlling the second control valve; at the same time, the first control valve is controlled to make the liquid inert gas supply unit supply liquid to the gas accumulator whose pressure value drops to the second predetermined pressure value.

9. The control method according to claim 8, characterized in that: According to the liquid level value collected by the liquid level measuring device in the currently rotating pressure water tank, by controlling the third control valve and the fourth control valve, the plurality of pressure water tanks provide high-pressure water to the spray gun in a rotating working mode; comprising: 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 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 made to spray water by controlling the fourth control valve; 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 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 currently rotating pressure water tank by the second control valve; at the same time, the fourth control valve is controlled to enable the new currently rotating pressure water tank to provide high-pressure water to the spray gun; and the third control valve is controlled to enable the water supply system to replenish water for the pressure water tank whose water level drops to the second predetermined water level.

10. The control method according to claim 9, 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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