PULSED LOW-ALTITUDE AND HIGH-SPRAY TANK FIRE TRUCK AND SPRAY METHOD THEREOF

Abstract

A pulsed low-altitude and high-spray tank fire truck and a spray method thereof are provided. A liquid working medium is stored in the liquid working medium storage tank. A phase change enabler is configured to heat the liquid working medium such that the liquid working medium changes from a liquid phase into a gas phase and to pressurize the gasified working medium and send it into an energy storage gas tank. The first and second pressure-resistant water tanks work alternately. The first and second electric control water cannons are configured to spray a high-pressure liquid fire extinguishing agent to a position of a fire point at a specified height. The system control module is configured to realize automatic inflating of the first and second pressure-resistant water tanks and automatic spray operation of the first and second electric control water cannons.

Claims

1. A pulsed low-altitude and high-spray tank fire truck, comprising a carrying module for providing maneuverability guarantee, a liquid working medium storage tank for storing a liquid working medium and having a liquid outlet, an energy storage gas tank having a gas inlet and a gas outlet, a first pressure-resistant water tank, a second pressure-resistant water tank, a low-pressure water tank, and a system control module which is arranged on the carrying module, wherein the liquid outlet of the liquid working medium storage tank is connected with the gas inlet of the energy storage gas tank through a phase change enabler, wherein the phase change enabler is configured to heat the liquid working medium output from the liquid working medium storage tank for being energized such that the liquid working medium changes from a liquid phase into a gas phase and to pressurize the gasified working medium and transfer the gasified working medium into the energy storage gas tank, wherein the gas outlet of the energy storage gas tank is connected to a gas inlet of the first pressure-resistant water tank and to a gas inlet of the second pressure-resistant water tank through two gas intake branches, wherein the energy storage gas tank is configured to provide a high-pressure gaseous working medium having a selected pressure for the first pressure-resistant water tank and the second pressure-resistant water tank filled with a liquid fire extinguishing agent, wherein a first electric control water cannon and a second electric control water cannon are respectively arranged on the first pressure-resistant water tank and the second pressure-resistant water tank, the first pressure-resistant water tank and the second pressure-resistant water tank are used for working alternately, the first electric control water cannon and the second electric control water cannon are respectively configured to spray a high-pressure liquid fire extinguishing agent formed in the first pressure-resistant water tank and the second pressure-resistant water tank to a position of a fire point at a specified height, and wherein the specified height is dependent on the specified pressure; and wherein the system control module is configured to realize automatic inflating of the first pressure-resistant water tank and the second pressure-resistant water tank and automatic spray operation of the first electric control water cannon and the second electric control water cannon.

2. The pulsed low-altitude and high-spray tank fire truck according to claim 1, wherein the low-pressure water tank is connected with a water source through a water supply pipe, wherein the water source is one of a water wagon, a watering cart or a fire hydrant, wherein a water pump capable of generating a certain pressure is mounted on the water supply pipe, wherein two water outlets of the low-pressure water tank are respectively connected with water inlets of the first pressure-resistant water tank and the second pressure-resistant water tank through water injection branch pipes, and a first liquid injection valve and a second liquid injection valve are respectively mounted on the water injection branch pipes of the first pressure-resistant water tank and the second pressure-resistant water tank.

3. The pulsed low-altitude and high-spray tank fire truck according to claim 1, wherein a first pressure relief valve and a second pressure relief valve are respectively arranged on the first pressure-resistant water tank and the second pressure-resistant water tank.

4. The pulsed low-altitude and high-spray tank fire truck according to claim 1, wherein the energy storage gas tank, the first pressure-resistant water tank, the second pressure-resistant water tank and all pipelines are provided with one or more sensors or electric control valves, and the sensors and electric control valves are coupled to the system control module to realize automatic control of a system.

5. The pulsed low-altitude and high-spray tank fire truck according to claim 1, wherein the liquid fire extinguishing agent is water or fire extinguishing foam liquid.

6. The pulsed low-altitude and high-spray tank fire truck according to claim 1, wherein the working medium is carbon dioxide or nitrogen.

7. The pulsed low-altitude and high-spray tank fire truck according to claim 1, wherein the first electric control water cannon and the second electric control water cannon are both high-pressure fire cannons.

8. The pulsed low-altitude and high-spray tank fire truck according to claim 1, wherein the phase change enabler comprises a heat exchanger for gasifying an inflated liquid working medium and a heater for providing heat for the heat exchanger; and the liquid outlet of the liquid working medium storage tank is connected with a liquid inlet of the heat exchanger through a liquid inlet pipe, and a gas outlet of the heat exchanger is connected with the gas inlet of the energy storage gas tank through an exhaust pipe.

9. A spray method of a pulsed low-altitude and high-spray tank fire truck, comprising following steps: loading a liquid fire extinguishing agent into a low-pressure water tank, and filling a liquid fire extinguishing agent into a first pressure-resistant water tank and a second pressure-resistant water tank through the low-pressure water tank; injecting a high-pressure gaseous working medium into an energy storage gas tank by using a phase change enabler; opening intercommunicating valves on gas intake branches between the energy storage gas tank and the first pressure-resistant water tank and between the energy storage gas tank and the second pressure-resistant water tank, to apply pressure of the energy storage gas tank to liquid in the first pressure-resistant water tank and the second pressure-resistant water tank; and opening spray valves of a first electric control water cannon and a second electric control water cannon, to spray a high-pressure liquid extinguishing agent in the first pressure-resistant water tank and the second pressure-resistant water tank to a position of a fire point at a specified height; when a spraying of the first pressure-resistant water tank or the second pressure-resistant water tank is nearly completed, closing a intercommunicating valve on a corresponding gas intake branch to reserve gas sealed in the energy storage gas tank for a next spraying; when the spraying of the first pressure-resistant water tank or the second pressure-resistant water tank is completed, closing a corresponding spray valve and opening a pressure relief valve on a corresponding pressure-resistant water tank, to release residual gas in the corresponding pressure-resistant water tank and quickly reduce pressure in the corresponding pressure-resistant water tank to less than pressure of a water source, and opening a liquid injection valve to inject the liquid fire extinguishing agent into the corresponding pressure-resistant water tank; after the corresponding pressure-resistant water tank is filled with the liquid fire extinguishing agent, closing the pressure relief valve and the liquid injection valve and opening the intercommunicating valve on the corresponding gas inlet branch to inject the high-pressure gaseous working medium, and then starting next spraying again; and enabling the first pressure-resistant water tank and the second pressure-resistant water tank to work alternately to form impulsive long-distance large-water liquid spraying.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0026] FIG. 1 is a schematic diagram of a structure according to the present disclosure.

[0027] FIG. 2 is a control flow chart of a system according to the present disclosure.

DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] To facilitate the understanding of the present disclosure, the present disclosure will be further described in detail with reference to the attached drawings and embodiments thereof. It should be clear to those skilled in the art that the embodiments are only helpful for understanding the present disclosure, and should not be regarded as specific limitations of the present disclosure.

[0029] As shown in FIG. 1, the present disclosure provides a pulsed low-altitude and high-spray tank fire truck. The pulsed low-altitude and high-spray tank fire truck includes a carrying module for providing maneuverability guarantee, and further includes a liquid working medium storage tank 1, an energy storage gas tank 3, a first pressure-resistant water tank 4, a second pressure-resistant water tank 5, a low-pressure water tank 6 and a system control module 14 which are arranged on the carrying module. A liquid working medium is stored in the liquid working medium storage tank 1, and the working medium is carbon dioxide or nitrogen. A liquid outlet of the liquid working medium storage tank 1 is connected with a gas inlet of the energy storage gas tank 3 through a phase change enabler 2. The phase change enabler 2 is configured to heat the liquid working medium output from the liquid working medium storage tank 1 for being energized such that the liquid working medium changes from a liquid phase into a gas phase, and then to pressurize the gasified working medium and send it into an energy storage gas tank 3. A gas outlet of the energy storage gas tank 3 is connected with gas inlets of the first pressure-resistant water tank 4 and the second pressure-resistant water tank 5 through two gas intake branches. The energy storage gas tank 3 is configured to provide a high-pressure gaseous working medium with specified pressure for the first pressure-resistant water tank 4 and the second pressure-resistant water tank 5 filled with a liquid fire extinguishing agent. The liquid fire extinguishing agent is water or fire extinguishing foam liquid. A first electric control water cannon 7 and a second electric control water cannon 8 are respectively arranged on the first pressure-resistant water tank 4 and the second pressure-resistant water tank 5. The first pressure-resistant water tank 4 and the second pressure-resistant water tank 5 are used for working alternately. The first electric control water cannon 7 and the second electric control water cannon 8 are respectively configured to spray a high-pressure liquid fire extinguishing agent formed in the first pressure-resistant water tank 4 and the second pressure-resistant water tank 5 to a position of a fire point at a specified height, and the specified height is dependent on the specified pressure. The system control module 14 is configured to realize automatic inflating of the first pressure-resistant water tank 4 and the second pressure-resistant water tank 5 and automatic spray operation of the first electric control water cannon 7 and the second electric control water cannon 8. The first electric control water cannon 7 and the second electric control water cannon 8 are both high-pressure fire cannons, which are resistant to high pressure (more than 4 MPa) and large in flow (more than 250) L/S), and can realize two-dimensional rotational control.

[0030] In the present disclosure, the term pulsed means that the spraying of the high-pressure liquid fire extinguishing agent in the pressure-resistant water tank is pulsed, with an interval of about 1 minute. The term low-altitude means that the fire truck is parked on the ground or road. The term high-spray means that the spray height is more than 100 meters, and the liquid extinguishing agent can be sprayed to a fire point at a height of 100 meters, so that high-rise fire extinguishing is realized. Large flow refers to the flow of more than 250 L/S or more than 60) cubic meters per hour to meet the needs of high-rise fire extinguishing or forest fire extinguishing, etc. The tank fire truck means that the pressure-resistant water tank and the energy storage gas tank are characteristic structures of the fire truck.

[0031] A low-pressure water tank 6 is also arranged on the carrying module. The low-pressure water tank 6 is connected with a water source through a water supply pipe. The water source is a water wagon, a watering cart or a fire hydrant. A water pump 13 capable of generating certain pressure is mounted on the water supply pipe. Two water outlets of the low-pressure water tank 6 are respectively connected with water inlets of the first pressure-resistant water tank 4 and the second pressure-resistant water tank 5 through water injection branch pipes. A first liquid injection valve 11 and a second liquid injection valve 12 are respectively mounted on the water injection branch pipes of the first pressure-resistant water tank 4 and the second pressure-resistant water tank 5. A first pressure relief valve 9 and a second pressure relief valve 10 are respectively arranged on the first pressure-resistant water tank 4 and the second pressure-resistant water tank 5.

[0032] The present disclosure adopts two-stage water tanks to inject water so as to solve the difficulty in continuous water injection under high pressure. The first-stage water tank consists of two high-pressure water tanks, namely the first pressure-resistant water tank 4 and the second pressure-resistant water tank 5. Under high pressure, liquid spraying at a height of over 100 meters can be realized. The second-stage water tank is the low-pressure water tank 6.

[0033] When the first pressure-resistant water tank 4 and the second pressure-resistant water tank 5 are in a high-pressure state, the first liquid injection valve 11 and the second liquid injection valve 12 are in a closed state. When the spraying of the pressure-resistant water tank is completed, residual gas is released for rapid pressure relief. When the pressure of the pressure-resistant water tank is lower than that of the low-pressure water tank 6, the liquid injection valve is automatically opened, and the liquid in the low-pressure water tank 6 can be quickly injected into the pressure-resistant water tank in a low-pressure state through the liquid injection valve until the pressure-resistant water tank is filled. Then, the liquid spraying process of the pressure-resistant water tank can be started again.

[0034] In the whole process, the pressure of the water pump is larger than that of the low-pressure water tank 6 so as to realize continuous liquid injection, ensuring that liquid sprayed by the pressure-resistant water tank is continuously supplied, and dynamic supply balance can be realized through matching the parameters such as pressure and flow rate. Continuous water supply of the low-pressure water tank 6 and pulsed spraying of the pressure-resistant water tank are realized.

[0035] The first pressure-resistant water tank 4 and the second pressure-resistant water tank 5 alternately spray water to shorten the interval time of spraying, thus realizing quasi-continuous spraying. A single pressure-resistant water tank is small in water quantity and small in gas consumption, so that second spraying can be realized faster, the cost is lower, and the single pressure-resistant water tank is more suitable for vehicles.

[0036] Liquid carbon dioxide or liquid nitrogen is heated and enabled to be changed into a gas phase from a liquid phase, and then the gas is pressurized and sent to the energy storage gas tank 3. By using gas such as carbon dioxide or nitrogen as an energy storage medium, the energy storage gas tank 3 provides high pressure for liquid spraying, and provides energy conversion (intramolecular energy is converted into kinetic energy of liquid spraying).

[0037] The phase change enabler 2 includes a heat exchanger for gasifying an inflated liquid working medium and a heater for providing heat for the heat exchanger. The liquid outlet of the liquid working medium storage tank 1 is connected with a liquid inlet of the heat exchanger through a liquid inlet pipe, and a gas outlet of the heat exchanger is connected with the gas inlet of the energy storage gas tank 3 through an exhaust pipe.

[0038] The phase change enabler 2 is high in power, so that the spray frequency can be improved. The liquid carbon dioxide or liquid nitrogen is heated for being energized such that the liquid carbon dioxide or liquid nitrogen changes from a liquid phase into a gas phase, and then to pressurize the gasified carbon dioxide or gasified nitrogen and send it to the energy storage gas tank 3. The liquid carbon dioxide or liquid nitrogen is output from the liquid working medium storage tank 1 and gasified through the heat exchanger. Energy of the overheated liquid output from the heat source is transferred in the heat exchanger to enable the liquid carbon dioxide or liquid nitrogen to be gasified. The gasified working medium is filled into the energy storage gas tank 3, and the pressure of the energy storage gas tank 3 is raised to a design value. In order to ensure smooth discharge of the liquid working medium storage tank 1, a booster pump 15 is used for pressurizing the liquid working medium storage tank 1.

[0039] The energy storage gas tank 3, the first pressure-resistant water tank 4, the second pressure-resistant water tank 5 and all pipelines are provided with sensors or electric control valves, and all sensors and electric control valves are connected with the system control module 14 to realize automatic control of the system.

[0040] The spray height is controlled by controlling the setting of spray pressure, and the gas supply speed is controlled by the power of phase change enabler 2, thereby controlling the pulse frequency of spraying. Through multi-point data acquisition of pressure, temperature, liquid level, etc, the opening and closing control for valves is optimized, and the pulse frequency is improved. Gas supply, water supply, water spraying, fire extinguishing height, aiming etc, are matched and optimized by the system control module 14.

[0041] The carrying module is provided with a dynamic load-bearing chassis, which promotes the maneuverability of the complete equipment and an electric support platform.

[0042] As shown in FIG. 2, the present disclosure also provides a spray method of the pulsed low-altitude and high-spray tank fire truck, including steps S1-S6.

[0043] In step S1, a liquid fire extinguishing agent is loaded into a low-pressure water tank 6, and the liquid fire extinguishing agent is filled into a first pressure-resistant water tank 4 and a second pressure-resistant water tank 5 through the low-pressure water tank 6.

[0044] In step S2, a high-pressure gaseous working medium is injected into an energy storage gas tank 3 by using a phase change enabler 2.

[0045] In step S3, intercommunicating valves on gas intake branches between the energy storage gas tank 3 and the first pressure-resistant water tank 4 and between the energy storage gas tank 3 and the second pressure-resistant water tank 5 are opened, to apply pressure of the energy storage gas tank 3 to liquid in the first pressure-resistant water tank 4 and the second pressure-resistant water tank 5; and spray valves of a first electric control water cannon 7 and a second electric control water cannon 8 are opened, to spray a high-pressure liquid extinguishing agent in the first pressure-resistant water tank 4 and the second pressure-resistant water tank 5 to a position of a fire point at a specified height.

[0046] In step S4, when a spraying of the first pressure-resistant water tank 4 or the second pressure-resistant water tank 5 is nearly completed, a intercommunicating valve on a corresponding gas intake branch is closed to reserve gas sealed in the energy storage gas tank 3 for a next spraying; when the spraying of the first pressure-resistant water tank 4 or the second pressure-resistant water tank 5 is completed, a corresponding spray valve is closed and a pressure relief valve on a corresponding pressure-resistant water tank is opened, to release residual gas in the corresponding pressure-resistant water tank and quickly reduce pressure in the corresponding pressure-resistant water tank to less than pressure of a water source, and then a liquid injection valve is opened to inject the liquid fire extinguishing agent into the corresponding pressure-resistant water tank.

[0047] In step S5, after the corresponding pressure-resistant water tank is filled with the liquid fire extinguishing agent, the pressure relief valve and the liquid injection valve are closed and the intercommunicating valve on the corresponding gas inlet branch is opened to inject the high-pressure gaseous working medium, and then next spraying again is started.

[0048] In step S6, the first pressure-resistant water tank 4 and the second pressure-resistant water tank 5 are enabled to work alternately to form impulsive long-distance large-water liquid spraying.

[0049] The present disclosure can realize ultra-high, ultra-long-distance and pulsed continuous large-flow water jet, and has the advantages of low cost, high efficiency, high safety, high applicability, no pollution and the like. When the equipment enters a fire scene, spraying is started immediately to extinguish fires without much preparation.

[0050] The applicant has successfully developed an asynchronous enabling high-rise fire extinguishing model machine. The model machine is placed on the road near a burning high-rise building, a pulse water jet with a vertical height of more than 100 meters can be realized, and water can be sprayed to the roof with a height of 80 meters in the first field test. With the progress of technology, the water jet is higher, the water quantity is larger, the duration is longer, and the pulse period is shorter, so that the needs of higher-level fire extinguishing can be met.

[0051] Although the embodiments of the present disclosure have already been illustrated and described, various changes, modifications, replacements and transformations can be made by those skilled in the art under the condition of without departing from the principle and the spirit of the present disclosure, and thus the scope of the present disclosure should be restricted by claims and equivalents thereof.