A pneumatic heavy-duty liquid injection device

Abstract

This invention relates to a pneumatic heavy-duty liquid injection device, belonging to the field of injection technology. The injection device includes a gas storage device, a liquid storage device, a nozzle body, and a control system. The gas outlet of the gas storage device is connected to the gas inlet of the liquid storage device via a pipeline equipped with a pressure reducing valve and a one-way valve, for inputting gas at a set pressure into the liquid storage device. The liquid storage device is equipped with a pressure sensor and a pressure relief valve. One end of the nozzle barrel in the nozzle body is connected to the opening of the liquid storage device via a pipeline, and the other end is connected to a cylinder opening valve. A front support and a rear support of the nozzle body support the nozzle body. The liquid injection valve in the cylinder opening valve is connected to the liquid injection pipe of the nozzle. The control system controls the opening and closing of the injection device, and the pressure sensor sends the monitored pressure data to the control system in real time. The injection device is used on heavy-duty vehicles and has a long injection distance.

Description

Technical Field

[0001] This invention relates to a pneumatic heavy-duty liquid injection device, belonging to the field of injection technology. Background Technology

[0002] Spraying devices are widely used, such as in firefighting where they can spray liquids to extinguish fires; they can also be used in conjunction with ignition devices to create firebreaks, which involves removing vegetation within the firebreak to prevent the spread of fire.

[0003] However, the current spraying devices have a short spraying distance, which limits their application. For example, in a fire scene, close-range firefighting can pose a safety risk to workers. Therefore, there is an urgent need for a spraying device with a longer spraying distance. Summary of the Invention

[0004] In view of this, in order to solve the technical problem of short spray distance of existing spraying devices, the present invention aims to provide a pneumatic heavy-duty liquid spraying device, which is used on heavy vehicles and has a long spray distance.

[0005] To achieve the objectives of this invention, the following technical solutions are provided.

[0006] A pneumatic heavy-duty liquid injection device includes an air storage device, a liquid storage device, a gun body, and a control system;

[0007] The outlet of the gas storage device is connected to the inlet of the liquid storage device through a pipeline equipped with a pressure reducing valve and a check valve, for inputting gas at a set pressure into the liquid storage device; the liquid storage device is equipped with a pressure sensor and a pressure relief valve.

[0008] The barrel in the gun body has one end connected to the opening of the liquid storage device through a pipeline, and the other end connected to the cylinder opening valve; the front support and the rear support of the gun body are used to support the gun body.

[0009] The injection valve in the cylinder opening valve is connected to the injection pipe of the nozzle.

[0010] The control system is used to control the opening and closing of the injection device, and the pressure sensor sends the monitored pressure data to the control system in real time.

[0011] Furthermore, when the liquid storage device contains oil, an ignition device is also provided at the front end of the nozzle. The igniter in the ignition device is installed on the ignition plate. The igniter includes 2n oil ignition tubes, where n is a positive integer and greater than or equal to 2. The oil ignition tubes are evenly and intermittently distributed in two circles along the circumference on the ignition plate.

[0012] Furthermore, the control system can activate the ignition device when the injection device is in the open state; the ignition device injects four fuel ignition tubes at a time; each injection first ignites the two opposing fuel ignition tubes in the inner ring, and after a set interval, ignites the two opposing fuel ignition tubes in the outer ring.

[0013] Furthermore, the gas storage device inputs gas at a pressure of 6 MPa ± 0.5 MPa into the liquid storage device;

[0014] The nozzle is a circular nozzle with a throat diameter of 20mm±2mm and a length of 165mm±5mm.

[0015] Furthermore, the volume of the liquid storage device is greater than or equal to 170L.

[0016] Furthermore, the gas storage device includes two first high-pressure gas cylinders connected in parallel; each of the two first high-pressure gas cylinders is equipped with a pressure reducing valve at its outlet, and simultaneously fills the liquid storage device with gas.

[0017] Furthermore, the liquid storage device consists of two liquid tanks connected in series, namely a first liquid tank and a second liquid tank; the upper end of the first liquid tank is provided with an air inlet and an opening A for filling the first liquid tank with liquid, and the upper end of the second liquid tank is provided with an opening B as the liquid outlet of the second liquid tank, and a siphon tube connected to the opening B is provided inside the second liquid tank; a through hole is provided at the bottom of the first liquid tank and is connected to the through hole at the bottom of the second liquid tank in sequence through a first pipe and a second pipe, one end of the second pipe is connected to the first pipe through a flange, and the other end of the second pipe extends to the height corresponding to the maximum liquid capacity in the second liquid tank; a pressure sensor is provided on the upper end of the first liquid tank, and both the upper end of the first liquid tank and the upper end of the second liquid tank are provided with pressure relief valves.

[0018] Furthermore, the cylinder opening valve is connected to the second high-pressure gas cylinder through a pipeline equipped with an electromagnetic reversing valve. A pressure reducing valve is installed at the outlet of the second high-pressure gas cylinder. After the gas in the second high-pressure gas cylinder is depressurized, it flows through the electromagnetic reversing valve and enters the cylinder opening valve.

[0019] Furthermore, the control system includes a PLC control panel and an internal control module. The internal control module controls the solenoid directional valve to open and close the cylinder opening valve, and controls the opening and closing of the first high-pressure gas cylinder and the second high-pressure gas cylinder, thereby realizing the opening and closing of the injection device. The PLC control panel displays the status of the injection device.

[0020] The pressure sensor sends the pressure data of the liquid storage device to the internal control module in real time, and monitors the pressure information in the liquid storage device in the PLC control panel.

[0021] Beneficial effects

[0022] (1) This invention provides a pneumatic heavy-duty liquid injection device, which is used on heavy vehicles. The gas in its gas storage device is the driving medium, realizing a gas-driven mode. The overall layout and arrangement of the gas storage device, liquid storage device, gun body and nozzle increases the range and flow rate of the injection device.

[0023] (2) The present invention provides a pneumatic heavy-duty liquid injection device, wherein the distribution of the oil ignition tubes in the ignition device is more uniform, the ignition device injects four oil ignition tubes at a time, and the ignition method is conducive to increasing the range.

[0024] (3) The present invention provides a pneumatic heavy-duty liquid injection device, which uses a specific nozzle and is driven by gas at 6MPa±0.5MPa, which can further increase the range and flow rate of the injection device.

[0025] (4) The present invention provides a pneumatic heavy-duty liquid injection device. Because the injection device has a large-capacity liquid storage device and the nozzle, it can increase the number of injections and the amount of oil used. Compared to a backpack pneumatic injection device, the injection device of the present invention increases the number of injections to more than two, and the amount of oil injected in one injection is more than eight times that of a backpack pneumatic injection device.

[0026] (5) The present invention provides a pneumatic heavy-duty liquid injection device, wherein the control system is set up to facilitate the operation of the injection device. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the pneumatic heavy-duty liquid injection device.

[0028] Figure 2 This is a schematic diagram of the structure of the first liquid tank and the second liquid tank.

[0029] Figure 3 This is a top view of the first and second liquid tanks.

[0030] Figure 4 This is a schematic diagram of the ignition plate.

[0031] Figure 5 This is a schematic diagram of a fuel ignition tube.

[0032] Among them, 1-first high-pressure gas cylinder, 2-first liquid tank, 3-second liquid tank, 4-gun body, 5-cylinder opening valve, 6-gun body front support, 7-gun body rear support, 8-ignition device, 9-air inlet, 10-opening A, 11-opening B, 12-siphon tube, 13-first pipeline, 14-second pipeline, 15-pressure sensor, 16-pressure relief valve, 17-ignition plate, 18-fuel ignition tube. Detailed Implementation

[0033] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0034] Example 1

[0035] A pneumatic heavy-duty liquid injection device, the injection device comprising an air storage device, a liquid storage device, a gun body 4, and a control system;

[0036] The outlet of the gas storage device is connected to the inlet 9 of the liquid storage device via a pipeline for filling the liquid storage device with gas; a pressure reducing valve is installed at the outlet of the gas storage device so that the gas in the gas storage device flows to the liquid storage device after pressure reduction; a one-way valve is installed at the inlet of the liquid storage device to prevent gas backflow.

[0037] In this embodiment, the gas storage device includes two parallel high-pressure gas cylinders 1, each with a volume of 60L and a pressure of 35MPa. Each of the two high-pressure gas cylinders 1 has a pressure reducing valve at its outlet, and simultaneously fills the liquid storage device with gas. Furthermore, this embodiment uses high-pressure gas at a pressure of 6MPa as the driving medium; that is, the gas in the gas storage device is reduced to 6MPa by the pressure reducing valve and then supplied to the liquid storage device to drive the liquid in the liquid delivery device.

[0038] The liquid storage device is provided with an opening (one opening can be provided for liquid inlet and outlet; two openings can be provided, namely an inlet and an outlet) for filling the liquid to be sprayed, such as water or oil (when the liquid storage device is filled with water, it can be used for fire extinguishing; when the liquid storage device is filled with oil, a fireproof isolation zone can be set up), and for supplying liquid to the gun body; the liquid storage device is provided with a pressure sensor 15 and a pressure relief valve 16. The pressure sensor 15 is used to monitor the pressure in the liquid storage device in real time. When the pressure in the liquid storage device reaches a set value, the pressure is released through the pressure relief valve 16.

[0039] In this embodiment, the liquid storage device consists of two 85L liquid tanks connected in series, namely a first liquid tank 2 and a second liquid tank 3. The upper end cap of the first liquid tank 2 is provided with an air inlet 9 and an opening A10. The opening A10 is used to fill the first liquid tank 2 with the liquid to be sprayed. The upper end cap of the second liquid tank 3 is provided with an opening B11 (the opening B11 is the liquid outlet of the liquid storage device and also serves as the liquid inlet of the second liquid tank 3, used to fill the second liquid tank 3 with the liquid to be sprayed). The second liquid tank 3 is provided with a siphon tube 12 connected to the opening B11. The bottom of the first liquid tank 2 is provided with a through hole through which the liquid is sequentially passed. The first pipe 13 and the second pipe 14 are connected to the through hole at the bottom of the second liquid tank 3. One end of the second pipe 14 is connected to the first pipe 13 through a flange, and the other end of the second pipe 14 extends to the height corresponding to the maximum liquid capacity in the second liquid tank 3 (that is, the height to which the second pipe 14 extends in the second liquid tank 3 is higher than the height corresponding to the maximum liquid capacity in the second liquid tank 3) to prevent liquid backflow. A pressure sensor 15 is provided on the upper end cap of the first liquid tank 2. Both the upper end caps of the first liquid tank 2 and the second liquid tank 3 are provided with pressure relief valves 16. When the first liquid tank 2 and the second liquid tank 3 need to be depressurized, the pressure is relieved through the pressure relief valves 16.

[0040] The gun body 4 includes a barrel, one end of which is connected to the opening of the liquid storage device (in this example, to the opening B11 of the upper end cap of the second liquid tank 3) via a pipeline (such as a high-pressure hose), and the other end is connected to a cylinder opening valve 5. The cylinder opening valve 5 is the starting cylinder described in Chinese patent application publication number CN104027910A. The injection valve in the cylinder opening valve 5 is connected to the injection pipe of the nozzle. The nozzle is a circular nozzle with a throat diameter of 20 mm and a length of 165 mm, thereby increasing the range and flow rate of the injection device. The front support 6 and the rear support 7 of the gun body are used to support the gun body 4 on a motor vehicle. In this invention, "front" refers to the direction in which the liquid in the liquid storage device is sprayed, and "rear" refers to the opposite direction.

[0041] The housing of the starting cylinder has a piston chamber near the rear end and a liquid injection chamber near the front end; the piston chamber has a piston that can reciprocate within the piston chamber, the front end of the piston extends into the liquid injection chamber, and a sealing device is provided between the outer wall of the front end of the piston and the inner wall of the liquid injection chamber.

[0042] The piston has a hollow cavity, the front end of which communicates with the spray chamber and the rear end of which communicates with the suction pipe. The rear end of the spray pipe of the nozzle is connected to the spray chamber. The valve seat of the spray valve is disposed between the rear end of the spray pipe and the spray chamber. The valve core of the spray valve is located in the spray chamber and is fixed to the piston, and can move with the piston. When the piston moves to its foremost position, the front end of the valve core cooperates with the valve seat to prevent liquid from entering the spray pipe from the spray chamber. When the piston moves backward, the valve core disengages from the valve seat, and liquid enters the spray pipe from the spray chamber.

[0043] The piston divides the piston chamber into an inlet chamber and an outlet chamber. The housing has an inlet port communicating with the inlet chamber and an outlet port communicating with the outlet chamber. A spring is installed in the outlet chamber to reset the piston. When the cylinder is opened, air is introduced into the inlet chamber through the inlet port. The piston moves backward under the pressure of the air, compressing the spring. The piston drives the valve core to move backward, disengaging it from the valve seat, and the injection valve opens. When the cylinder is closed, air intake stops, and the piston moves forward under the pressure of the spring. The valve core re-engages with the valve seat, and the injection valve closes.

[0044] The cylinder opening valve 5 is connected to a second high-pressure gas cylinder with a volume of 2L and a pressure of 35MPa via a pipeline equipped with an electromagnetic reversing valve. A pressure reducing valve is installed at the outlet of the second high-pressure gas cylinder. When the cylinder opening valve 5 is opened, the gas in the second high-pressure gas cylinder is depressurized and flows through the electromagnetic reversing valve into the inlet chamber of the cylinder opening valve 5, thus opening the cylinder opening valve 5. When the cylinder opening valve 5 is closed, the gas in the second high-pressure gas cylinder enters the outlet chamber of the cylinder opening valve 5 through the electromagnetic reversing valve, thus closing the cylinder opening valve 5. When injection is not required, the electromagnetic reversing valve is closed, and the second high-pressure gas cylinder is shut down.

[0045] The control system includes a PLC control panel and an internal control module. The internal control module controls the solenoid directional valve to open and close the cylinder opening valve 5, and controls the opening and closing of the first high-pressure gas cylinder 1 and the second high-pressure gas cylinder, thereby opening and closing the injection device. The PLC control panel displays the status of the injection device, including the open or closed status of the cylinder opening valve 5, and the open or closed status of the first high-pressure gas cylinder 1 and the second high-pressure gas cylinder.

[0046] The pressure sensor 15 sends the monitored pressure data to the internal control module in real time, and monitors the pressure value, pressure curve and other pressure information in the liquid storage device in the PLC control panel. In this example, the pressure relief valve 16 is a diaphragm type pressure relief valve. When the pressure in the liquid storage device reaches the set value (such as 7.5MPa), the diaphragm in the pressure relief valve 16 opens and automatically relieves pressure.

[0047] Example 2

[0048] Based on the pneumatic heavy-duty liquid injection device described in Example 1, when it is used to set up a firebreak, the first liquid tank 2 and the second liquid tank 3 contain oil, and an ignition device 8 is installed at the front end of the nozzle. The igniter in the ignition device 8 is installed on the ignition plate 17, and the igniter includes 2n oil ignition tubes 18, where n is a positive integer and greater than or equal to 2. The oil ignition tubes 18 are evenly distributed in two concentric circles on the ignition plate 17, that is, the outer circle of ignition tubes is located between two adjacent inner circle oil ignition tubes 18.

[0049] In this embodiment, n=8, therefore the igniter includes sixteen fuel ignition tubes 18. The ignition device sprays four fuel ignition tubes at a time to achieve multiple sprays. During each spray, two of the four fuel ignition tubes 18 are ignited every 1 second to ensure that the flame is uninterrupted during the fuel spraying process. Furthermore, among the four fuel ignition tubes 18, the two inner ring opposite fuel ignition tubes 18 are ignited first, and then the two outer ring opposite fuel ignition tubes 18 are ignited, which can increase the spraying distance of the spraying device.

[0050] The control system in this embodiment can activate the ignition device 8 when the injection device is in the open state.

[0051] The pneumatic heavy-duty liquid injection device, with its gas storage device, liquid storage device, and nozzle, increases the range and flow rate of the injection device. When the injection device does not have an ignition device 8, the injection distance of the liquid in the liquid storage device can reach at least 50m. When the ignition device 8 is added, due to the configuration of the ignition device 8 and the ignition method, the injection distance of the fuel in the liquid storage device can reach more than 100m, which is more than twice that of the backpack pneumatic injection device.

[0052] The spraying device is installed on a heavy vehicle, the liquid storage device, the gas storage device and the control system are installed inside the vehicle body, and the gun body 4 is installed on the top of the vehicle.

[0053] Because the spraying device has a large-capacity liquid storage device and the nozzle, it can increase the number of sprays and the amount of oil used. Compared with the backpack air pressure spraying device, the spraying device of the present invention increases the number of sprays to more than two, and the amount of oil fired at one time is more than eight times that of the backpack air pressure spraying device.

[0054] This invention includes, but is not limited to, the above embodiments. Any equivalent substitutions or partial improvements made under the spirit and principles of this invention shall be considered within the scope of protection of this invention.

Claims

1. A pneumatic heavy-duty liquid injection device, characterized in that: Includes gas storage device, liquid storage device, gun body, and control system; The outlet of the gas storage device is connected to the inlet of the liquid storage device through a pipeline equipped with a pressure reducing valve and a check valve, for inputting gas at a set pressure into the liquid storage device; the liquid storage device is equipped with a pressure sensor and a pressure relief valve. The barrel in the gun body has one end connected to the opening of the liquid storage device through a pipeline, and the other end connected to the cylinder opening valve; the front support and the rear support of the gun body are used to support the gun body. The injection valve in the cylinder opening valve is connected to the injection pipe of the nozzle. The control system is used to control the opening and closing of the injection device, and the pressure sensor sends the monitored pressure data to the control system in real time. The liquid storage device consists of two liquid tanks connected in series, namely a first liquid tank and a second liquid tank. The upper end of the first liquid tank is provided with an air inlet and an opening A for filling the first liquid tank with liquid. The upper end of the second liquid tank is provided with an opening B, which serves as the liquid outlet of the second liquid tank. A siphon tube connected to opening B is provided inside the second liquid tank. A through hole is provided at the bottom of the first liquid tank and is connected to the through hole at the bottom of the second liquid tank in sequence through a first pipe and a second pipe. One end of the second pipe is connected to the first pipe through a flange, and the other end of the second pipe extends to the height corresponding to the maximum liquid capacity in the second liquid tank. A pressure sensor is provided on the upper end of the first liquid tank, and both the upper end of the first and second liquid tanks are provided with pressure relief valves. The cylinder opening valve is connected to the second high-pressure gas cylinder through a pipeline equipped with an electromagnetic reversing valve. A pressure reducing valve is installed at the outlet of the second high-pressure gas cylinder. After the gas in the second high-pressure gas cylinder is depressurized, it flows through the electromagnetic reversing valve and enters the cylinder opening valve. The control system includes a PLC control panel and an internal control module. The internal control module controls the solenoid directional valve to open and close the cylinder opening valve, and controls the opening and closing of the first high-pressure gas cylinder and the second high-pressure gas cylinder, thereby opening and closing the injection device. The PLC control panel displays the status of the injection device. The pressure sensor sends the pressure data of the liquid storage device to the internal control module in real time, and monitors the pressure information in the liquid storage device in the PLC control panel.

2. The pneumatic heavy-duty liquid injection device according to claim 1, characterized in that: When the liquid storage device contains oil, an ignition device is also provided at the front end of the nozzle. The igniter in the ignition device is installed on the ignition plate. The igniter includes 2n oil ignition tubes, where n is a positive integer and greater than or equal to 2. The oil ignition tubes are evenly distributed in two intersecting circles on the ignition plate along the circumferential direction.

3. The pneumatic heavy-duty liquid injection device according to claim 2, characterized in that: The control system can activate the ignition device when the injection device is turned on; the ignition device injects four fuel ignition tubes at a time; each injection first ignites the two opposing fuel ignition tubes in the inner ring, and after a set interval, ignites the two opposing fuel ignition tubes in the outer ring.

4. A pneumatic heavy-duty liquid injection device according to any one of claims 1-3, characterized in that: The gas storage device inputs gas at a pressure of 6 MPa ± 0.5 MPa into the liquid storage device; The nozzle is a circular nozzle with a throat diameter of 20mm±2mm and a length of 165mm±5mm.

5. A pneumatic heavy-duty liquid injection device according to claim 4, characterized in that: The volume of the liquid storage device is greater than or equal to 170L.

6. A pneumatic heavy-duty liquid injection device according to claim 5, characterized in that: The gas storage device includes two first high-pressure gas cylinders connected in parallel; each of the two first high-pressure gas cylinders is equipped with a pressure reducing valve at its outlet and simultaneously fills the liquid storage device with gas.

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