Three-phase mixed jet small fire extinguishing device and application thereof

Abstract

This invention relates to a small three-phase mixing jet fire extinguishing device and its application. The small fire extinguishing device includes a back support and a powder tank, a water tank, and an air tank disposed on one side of the back support. The air tank has an air outlet at its bottom, the water tank has a water outlet at its bottom, and the powder tank has a powder outlet at its bottom. The air outlet is connected to the upper part of the water tank, the upper and lower parts of the powder tank, and the three-phase mixing jet nozzle via multiple pipelines. The water outlet and the powder outlet are also connected to the three-phase mixing jet nozzle via pipelines. In this invention, the air tank and water tank are detachable and replaceable, enabling mobile and rapid fire extinguishing. The air tank can be replaced with an air compressor for air supply, and the water tank can be replaced with a high-flow-rate water supply for extended fire extinguishing operations. The three-phase mixing jet nozzle adopts a design with powder exiting from the center and water exiting through an annular flow channel. The powder and water mix outside the nozzle, ensuring effective mixing and preventing gel formation that could clog the nozzle.

Description

Technical Field

[0001] This invention relates to a three-phase mixed jet miniature fire extinguishing device and its application, and particularly to a backpack miniature fire extinguishing device suitable for three-phase mixed jets made of highly absorbent resin materials, belonging to the field of fire protection equipment technology. Background Technology

[0002] Currently, small fire extinguishing devices mainly include dry powder fire extinguishers, foam fire extinguishers, and water-based fire extinguishers. Although the performance of extinguishing agent materials is constantly improving, the improvement in extinguishing efficiency is limited. Therefore, we need to shift our focus to methods or equipment. Nowadays, mixed jet fire extinguishing technology has been widely used and achieved good fire extinguishing effects. However, mixed jet powder materials are mostly hydrophobic dry powders, etc., where multiple extinguishing agents work independently, and the extinguishing efficiency is not effectively integrated. Highly absorbent resin materials, as powders, are different. They can mix with water to form a gel that covers the fire source, providing heat insulation, oxygen isolation, and cooling. Furthermore, due to their high water absorption and adhesion, they can adhere to combustibles for a long time, greatly reducing the chance of reignition. They are also pollution-free and environmentally friendly. Furthermore, shopping malls and office spaces have high electricity consumption, making them prone to fires. However, their limited space restricts firefighting capabilities. Large fire extinguishing equipment can only be used externally, which is costly. Conventional small devices can only extinguish small, newly formed fires, and are insufficient and inefficient for larger or medium-sized fires. Therefore, there is a need to develop a three-phase mixed jet small fire extinguishing device suitable for highly absorbent resin materials to solve this problem.

[0003] Chinese patent document CN208339959U discloses a backpack fire extinguisher with a detachable and replaceable extinguishing agent container. The extinguishing agent container and the backpack case are separate structures, and the extinguishing agent container can be freely removed and inserted from the upper slot of the backpack case. Patent CN213941939U discloses a backpack fire extinguishing device, including a backpack-type containing device and a fire extinguishing device. The fire extinguishing device ignites a gas-generating agent to produce gas into the fire extinguishing container. When the fire extinguishing container reaches a preset pressure, it drives the liquid extinguishing agent to be sprayed out from the nozzle. Chinese patent document CN220046916U discloses a backpack fire extinguishing and rescue equipment, including a water tank, a connecting assembly, a rotating assembly, and a fixing assembly. By mounting the aerosol nozzle on a clamping arc plate and adjusting the length of the rotating block, long-distance fire extinguishing can be achieved.

[0004] However, existing equipment is mainly designed for single extinguishing agents and backpack structures, without considering mixed jet equipment, especially when the spray powder is a superabsorbent polymer. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a three-phase mixed jet miniature fire extinguishing device. This solution can enable individual operation by changing gas cylinders and water tanks, and can also achieve long-term operation by connecting water and gas pipes to high-flow water and gas circuits. Moreover, the presence of the three-phase mixed water-powder nozzle ensures mixing and fire extinguishing effect, effectively improving fire extinguishing efficiency.

[0006] The present invention also provides a method for operating a three-phase mixed jet small fire extinguishing device.

[0007] The technical solution of the present invention is as follows:

[0008] A three-phase mixed jet miniature fire extinguishing device suitable for highly absorbent resin materials includes a back support and a powder tank, a water tank, and a gas tank disposed on one side of the back support.

[0009] The bottom of the gas tank is equipped with an air outlet, the bottom of the water tank is equipped with a water outlet, and the bottom of the powder tank is equipped with a powder outlet. The air outlet is connected to the upper part of the water tank, the upper and lower parts of the powder tank, and the three-phase mixing jet nozzle through multiple pipelines. The water outlet and the powder outlet are also connected to the three-phase mixing jet nozzle through pipelines.

[0010] The three-phase mixing jet nozzle includes a water pipe, a powder pipe, and a powder nozzle. The powder pipe is placed inside the water pipe and the head of the powder pipe is connected to the powder nozzle. The tail end of the powder pipe extends out of the water pipe, and a water inlet is provided on one side of the water pipe.

[0011] The powder outlet is connected to the end of the powder pipe via a pipeline, the water outlet is connected to the water inlet via a pipeline, and the air outlet is connected to the end of the powder pipe via a branch pipeline.

[0012] Preferably, the other side of the back support is provided with quick-release double shoulder straps. The advantage of this design is that the small fire extinguishing device is suitable for single-soldier operation environments, and the quick-release double shoulder straps can be quickly and securely fixed to the back of the operator.

[0013] Preferably, the water tank and the gas tank are located on both sides of the powder tank, and the volume of the powder tank is larger than the volume of the water tank and the gas tank.

[0014] Preferably, the water tank, powder tank, and gas tank are all connected to the back support by clamps.

[0015] Preferably, the back support is provided with a support frame for supporting the water tank, powder tank and gas tank.

[0016] Preferably, the back support is a square injection-molded body, and a cushioning pad is provided on the side of the back support that contacts the human body. The advantage of this design is that the cushioning pad can effectively reduce the pressure on the human back, making carrying tasks easier.

[0017] Preferably, the powder tank is provided with a top cover, and the top cover has a built-in pressure relief valve.

[0018] Preferably, the top of the water tank is provided with a top cover, and the top cover has a built-in pressure relief valve.

[0019] Preferably, a gas pressure regulating valve is provided at the gas outlet, an upper air inlet switch ball valve and a lower air inlet switch ball valve are provided on the branch pipes connecting the gas outlet to the upper and lower parts of the powder tank, and a cleaning gas control valve is provided on the branch pipe connecting the gas outlet to the three-phase mixing jet nozzle.

[0020] Preferably, a powder path switch ball valve is installed on the pipeline connecting the powder outlet and the three-phase mixing jet nozzle.

[0021] Preferably, a water circuit switch ball valve is installed on the pipeline connecting the water outlet and the three-phase mixing jet nozzle.

[0022] Preferably, the powder nozzle is threadedly connected to the powder tube head. The advantage of this design is that the threaded connection allows for the connection of powder nozzles of different specifications and shapes to the powder tube head.

[0023] Preferably, both the main pipe and branch pipes are made of rubber hoses. The advantage of this design is that rubber hoses offer good flexibility and are easier to operate.

[0024] A method for operating a small three-phase mixed jet fire extinguishing device suitable for highly absorbent resin materials includes the following steps:

[0025] 1) Open the top cover of the powder tank and water tank, add a certain amount of superabsorbent resin powder and water to the powder tank and water tank respectively, and tighten the top cover after adding.

[0026] 2) Open the gas pressure regulating valve, the upper air inlet switch ball valve and the lower air inlet switch ball valve to pressurize the powder tank and water tank through the gas tank. After the pressurization is completed, close the gas pressure regulating valve, the upper air inlet switch ball valve and the lower air inlet switch ball valve.

[0027] 3) The operator lifts the entire fire extinguishing device by carrying it on their back with the shoulder straps, holds the three-phase mixed jet nozzle and aims it at the target. First, open the powder circuit switch ball valve to spray the super absorbent resin powder material, and then open the water circuit switch ball valve to spray water. After the fire is extinguished, first close the water circuit switch ball valve, and then close the powder circuit switch ball valve.

[0028] 4) After the fire is extinguished, proceed with the cleanup operation. Open the gas pressure regulating valve and the cleaning gas control valve to allow high-pressure gas to enter the powder pipe of the three-phase mixing jet nozzle and thoroughly clean the residual material in the powder pipe. After cleaning, close the gas pressure regulating valve and the cleaning gas control valve. Then open the top cover of the powder tank and water tank, and use an air gun or high-pressure water gun to clean the powder tank and use an air gun to clean the water tank. After cleaning, ensure that the inside of the tank is dry.

[0029] Technical features and beneficial effects of the present invention:

[0030] 1. The fire extinguishing device of the present invention adopts a design with a central powder tank, two high-pressure air tanks and a water tank on both sides. The air tank and the water tank are detachable and replaceable, realizing mobile rapid fire extinguishing. At the same time, the air tank can be replaced with an air compressor for air supply, and the water tank can also be replaced with a high-flow water supply for water supply, realizing long-term fire extinguishing operation.

[0031] 2. In this invention, the three-phase mixing jet nozzle adopts the idea of ​​powder outlet in the middle and water outlet in the annular flow channel. The powder and water are mixed outside the nozzle, which ensures the water-powder mixing effect. It is especially suitable for mixing and spraying powders that are highly absorbent resin materials, and prevents the gel formed by water-powder mixing from clogging the nozzle.

[0032] 3. In this invention, the powder tank and water tank adopt a pressurized bottom discharge method, resulting in a large flow rate, good mixing effect, and high fire extinguishing efficiency. The connecting pipeline uses rubber hoses, making operation more convenient and aiming at the fire target easier. When not in use, the pipeline can be folded, minimizing space occupation.

[0033] 4. In this invention, the powder container is designed as the central body, and its volume far exceeds that of the water container, allowing for the filling of large quantities of powder without multiple fillings, thus saving manpower and time costs. The powder container can hold various powders with different properties, improving its applicability.

[0034] 5. The powder tube head of this invention is threaded, which can be used to install powder nozzles with different structures and orifice diameters, making it flexible and adaptable to achieve different fire extinguishing effects. Attached Figure Description

[0035] Figure 1 This is a perspective view of the fire extinguishing device of the present invention;

[0036] Figure 2 This is a front view of the fire extinguishing device of the present invention;

[0037] Figure 3 This is a schematic diagram of the pipelines in the fire extinguishing device of the present invention;

[0038] Figure 4 This is a schematic diagram of the structure of the mixing jet nozzle in this invention;

[0039] Figure 5 This is a cross-sectional view of the mixing jet nozzle in this invention;

[0040] In the diagram: 1-Three-phase mixing jet nozzle, 2-Powder circuit switch ball valve, 3-Water circuit switch ball valve, 4-Air circuit pressure regulating valve, 5-Purge air circuit control valve, 6-Air tank, 7-Upper air inlet switch ball valve, 8-Lower air inlet switch ball valve, 9-Powder tank, 10-Back support, 11-Water tank, 101-Powder pipe, 102-Water pipe, 103-Water pipe head, 104-Powder nozzle. Detailed Implementation

[0041] The present invention will be further described below with reference to the embodiments and accompanying drawings, but is not limited thereto.

[0042] Example 1:

[0043] like Figure 1-5 As shown, this embodiment provides a three-phase mixed jet small fire extinguishing device suitable for highly absorbent resin materials, including a back support 10 and a powder tank 9, a water tank 11 and a gas tank 6 disposed on one side of the back support;

[0044] The bottom of the gas tank 6 is provided with an air outlet and is turned on and off by a knob. The bottom of the water tank 11 is provided with a water outlet, and the bottom of the powder tank 9 is provided with a powder outlet. The air outlet is connected to the upper part of the water tank 11, the upper and lower parts of the powder tank 9, and the three-phase mixing jet nozzle 1 through multiple pipes. The water outlet and the powder outlet are also connected to the three-phase mixing jet nozzle 1 through pipes.

[0045] The three-phase mixing jet nozzle 1 includes a water pipe 102, a powder pipe 101 and a powder nozzle 104. The powder pipe 101 is placed inside the water pipe 102 and the head of the powder pipe is connected to the powder nozzle 104. The tail end of the powder pipe extends out of the water pipe 102. A water inlet is provided on one side of the water pipe 102.

[0046] The powder outlet is connected to the end of the powder pipe via a pipeline, the water outlet is connected to the water inlet via a pipeline, and the air outlet is connected to the end of the powder pipe via a branch pipeline.

[0047] Specifically, this small fire extinguishing device is suitable for individual operation. The operator can carry the device to extinguish fires flexibly at the scene, especially in situations where the fire is small. The other side of the back support is equipped with quick-release shoulder straps. This small fire extinguishing device is suitable for individual operation environments; the quick-release shoulder straps allow it to be quickly and securely fixed to the operator's back, similar to a backpack.

[0048] Water tank 11 and gas tank 6 are positioned on either side of powder tank 9. Powder tank 9 has a larger volume than both water tank 11 and gas tank 6, allowing for continuous operation for an extended period once it is fully filled. Water tank 11, powder tank 9, and gas tank 6 are all connected to the back support 10 via clamps (not shown in the diagram). One end of the clamp is fixed to the back support with bolts or directly welded to it. The clamp wraps around water tank 11, powder tank 9, or gas tank 6, and the other end is then secured with bolts. The bottom of water tank 11, powder tank 9, or gas tank 6 is supported by a support frame on the back support 10.

[0049] The powder tank 9 is equipped with a top cover, which contains a pressure relief valve. The water tank 11 is also equipped with a top cover, which contains a pressure relief valve. The pressure relief valves allow for rapid pressure release, balancing the pressure inside and outside the tank.

[0050] A gas pressure regulating valve 4 is installed at the gas outlet. Upper air inlet switch ball valve 7 and lower air inlet switch ball valve 8 are installed on the branch pipes connecting the gas outlet to the upper and lower parts of the powder tank. A cleaning air control valve 5 is installed on the branch pipe connecting the gas outlet to the three-phase mixing jet nozzle 1. A powder switch ball valve 2 is installed on the pipe connecting the powder outlet to the three-phase mixing jet nozzle 1. A water switch ball valve 3 is installed on the pipe connecting the water outlet to the three-phase mixing jet nozzle 1.

[0051] This embodiment of the technical solution describes a fire extinguishing device that employs a central powder tank, two high-pressure air tanks on either side, and a water tank. The air and water tanks are detachable and replaceable, enabling mobile and rapid fire extinguishing. The air tanks can be replaced with air compressors, and the water tanks can be replaced with high-flow-rate water supply, allowing for extended fire extinguishing operations. The powder and water tanks utilize a pressurized bottom-discharge system, resulting in high flow rates, excellent mixing, and high fire extinguishing efficiency. The connecting pipelines use rubber hoses for easier operation and aiming at the target fire. When not in use, the pipelines are foldable, minimizing space occupation. The three-phase mixing jet nozzle employs a central powder outlet and an annular flow channel for water outlet. The powder and water mix outside the nozzle, ensuring effective mixing, especially suitable for spraying powders made from highly absorbent resin materials, preventing gel formation from clogging the nozzle.

[0052] The key to this invention lies in reconstructing the hydrogel-forming reaction from a premixing process within the equipment to a jet transport process within the external air domain. Here, "premixing" specifically refers to any encounter and contact within the equipment sufficient to allow the superabsorbent polymer (SAP) and water / water-based media to reach a gel phase. Existing gel-based fire extinguishing agents require the SAP and water to be premixed into a gel in the tank, pump, or pipeline. This creates a process contradiction between the usable concentration and fluid flowability, leading to "high concentration clogging—low concentration failure." Range, reliability, adhesion, and thermal insulation are difficult to balance, hindering their widespread adoption in the aforementioned long-distance firefighting operations.

[0053] The present invention ensures that the dry SAP powder and water / water-based media are always transported along independent channels within the equipment and are physically isolated throughout the process. No mixing occurs within the physical interface between the equipment body and the external atmosphere (i.e., the nozzle end face). The outlets of the two media are projected towards the same air space outside the equipment, and they only meet for the first time in this space. During the flight of the jet towards the target, they complete water absorption, swelling, cross-linking and film formation, forming a gel barrier with adhesion, heat insulation and oxygen barrier properties at the moment of target impact.

[0054] Example 2:

[0055] A three-phase mixed jet miniature fire extinguishing device suitable for highly absorbent resin materials is disclosed. The structure is as described in Example 1, but with the following difference: the back support 10 is a square injection-molded body, conforming to ergonomics, making it easier and more comfortable for the operator to carry. A fire-resistant and heat-insulating cushioning pad is provided on the side of the back support 10 that contacts the human body. The cushioning pad effectively reduces the stress on the back, making carrying operations easier.

[0056] Example 3:

[0057] A three-phase mixed jet small fire extinguishing device suitable for highly absorbent resin materials, with the structure as described in Example 1, except that pressure gauges are also installed on the top of the water tank 11 and the powder tank 9, so that the pressure inside the tank can be observed at any time.

[0058] Example 4:

[0059] A small three-phase mixed jet fire extinguishing device suitable for highly absorbent resin materials is disclosed, with the structure described in Example 1, except that the powder nozzle 104 is threadedly connected to the powder tube head. The powder tube head is threaded, allowing the powder tube head to be connected to powder nozzles 104 of different specifications and shapes.

[0060] Example 5:

[0061] A small three-phase mixed jet fire extinguishing device suitable for highly absorbent resin materials is disclosed. The structure is as described in Example 1, except that both the main pipe and branch pipes are made of rubber hoses. Rubber hoses offer good flexibility and are easier to operate.

[0062] Example 6:

[0063] A method for operating a small three-phase mixed jet fire extinguishing device suitable for highly absorbent resin materials, based on any of the technical solutions in Examples 1-5, includes the following steps:

[0064] 1) Filler: Quickly release the pressure inside the tank by pressing the pressure relief valve, observe the pressure gauge, and after the pressure inside the tank is balanced, slowly open the top cover of powder tank 9 and water tank 11. Then add a certain amount of superabsorbent resin powder and clean water to powder tank 9 and water tank 11 respectively. After adding, tighten the top cover. Note that when adding superabsorbent resin powder, ensure that the surrounding environment is dry to avoid excessive humidity causing the powder to absorb moisture and clump, or the material and water to mix in the powder tank.

[0065] 2) Pressurization: Open the switch knob at the bottom of the gas tank 6, the gas pressure regulating valve 4, the upper air inlet switch ball valve 7, and the lower air inlet switch ball valve 8. The high-pressure gas flow in the gas tank 6 is reduced to 0.8MPa through the gas pressure regulating valve 4, and then enters the powder tank 9 and water tank 11 through the rubber hose for pressurization. Observe the pressure gauge at the bottom of the gas tank 6. When the needle stops rotating, it indicates that the pressurization is complete. At this time, rotate the switch knob at the bottom of the gas tank in the opposite direction to close the gas pressure regulating valve 4, the upper air inlet switch ball valve 7, and the lower air inlet switch ball valve 8.

[0066] 3) Spraying: Before spraying, the operator should wear protective clothing, lift the entire fire extinguishing device by the shoulder straps, hold the three-phase mixing jet nozzle 1 and aim it at the target, keeping it as horizontal as possible. First, open the powder circuit switch ball valve 2 to spray the super absorbent resin powder material, and then open the water circuit switch ball valve 3 to spray water. The purpose of this operation is to prevent water from coming out first and then powder from mixing too early at the nozzle and forming a gel, which would cause the powder nozzle to become clogged. After the fire is extinguished, first close the water circuit switch ball valve 3, and then close the powder circuit switch ball valve 2.

[0067] 4) Cleaning: After extinguishing the fire, close all valves and proceed with the cleaning operation. Open the switch knob at the bottom of the gas tank 6, the gas pressure regulating valve 4, and the cleaning gas control valve 5 to allow high-pressure gas to enter the powder pipe 101 of the three-phase mixing jet nozzle 1 and thoroughly clean the residual material in the powder pipe. After cleaning, close the switch knob at the bottom of the gas tank 6, the gas pressure regulating valve 4, and the cleaning gas control valve 5. Then press the pressure relief valve to release the excess pressure in the powder tank 9 and water tank 11. Open the top cover of the powder tank 9 and water tank 11, and use an air gun or high-pressure water gun to clean the powder tank 9 and use an air gun to clean the water tank 11. After cleaning, ensure that the inside of the tank is dry.

[0068] The above description is merely a specific embodiment of the present invention, and the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A small three-phase mixed jet fire extinguishing device suitable for highly absorbent resin materials, characterized in that, Includes a back support and powder, water, and gas containers located on one side of the back support; The bottom of the gas tank is equipped with an air outlet, the bottom of the water tank is equipped with a water outlet, and the bottom of the powder tank is equipped with a powder outlet. The air outlet is connected to the upper part of the water tank, the upper and lower parts of the powder tank, and the three-phase mixing jet nozzle through multiple pipelines. The water outlet and the powder outlet are also connected to the three-phase mixing jet nozzle through pipelines. The three-phase mixing jet nozzle includes a water pipe, a powder pipe, and a powder nozzle. The powder pipe is placed inside the water pipe and the head of the powder pipe is connected to the powder nozzle. The tail end of the powder pipe extends out of the water pipe, and a water inlet is provided on one side of the water pipe. The powder outlet is connected to the end of the powder pipe via a pipeline, the water outlet is connected to the water inlet via a pipeline, and the air outlet is connected to the end of the powder pipe via a branch pipeline.

2. The three-phase mixed jet miniature fire extinguishing device suitable for highly absorbent resin materials as described in claim 1, characterized in that, The other side of the back support is equipped with quick-release double shoulder straps.

3. The three-phase mixed jet miniature fire extinguishing device suitable for highly absorbent resin materials as described in claim 1, characterized in that, The water tank, powder tank, and gas tank are all connected to the back support via clamps.

4. The three-phase mixed jet miniature fire extinguishing device suitable for highly absorbent resin materials as described in claim 1, characterized in that, The back support is equipped with a support frame for supporting water tanks, powder tanks and gas tanks.

5. The three-phase mixed jet miniature fire extinguishing device suitable for highly absorbent resin materials as described in claim 1, characterized in that, The powder tank is equipped with a top cover, and the top cover has a built-in pressure relief valve; the water tank is equipped with a top cover, and the top cover has a built-in pressure relief valve.

6. The three-phase mixed jet miniature fire extinguishing device suitable for highly absorbent resin materials as described in claim 1, characterized in that, A gas pressure regulating valve is installed at the gas outlet. An upper air inlet switch ball valve and a lower air inlet switch ball valve are installed on the branch pipes connecting the gas outlet to the upper and lower parts of the powder tank. A cleaning gas control valve is installed on the branch pipe connecting the gas outlet to the three-phase mixing jet nozzle.

7. The three-phase mixed jet miniature fire extinguishing device suitable for highly absorbent resin materials as described in claim 1, characterized in that, A powder path switch ball valve is installed on the pipeline connecting the powder outlet to the three-phase mixing jet nozzle.

8. The three-phase mixed jet miniature fire extinguishing device suitable for highly absorbent resin materials as described in claim 1, characterized in that, A water circuit switch ball valve is installed on the pipeline connecting the water outlet and the three-phase mixing jet nozzle.

9. The three-phase mixed jet miniature fire extinguishing device suitable for highly absorbent resin materials as described in claim 1, characterized in that, The powder spray nozzle is threadedly connected to the head of the powder tube.

10. A method of operating a three-phase mixed jet small fire extinguishing device suitable for highly absorbent resin materials as described in any one of claims 1-9, comprising the following steps: 1) Open the top cover of the powder tank and water tank, add a certain amount of superabsorbent resin powder and water to the powder tank and water tank respectively, and tighten the top cover after adding. 2) Open the gas pressure regulating valve, the upper air inlet switch ball valve and the lower air inlet switch ball valve to pressurize the powder tank and water tank through the gas tank. After the pressurization is completed, close the gas pressure regulating valve, the upper air inlet switch ball valve and the lower air inlet switch ball valve. 3) The operator lifts the entire fire extinguishing device by carrying it on their back with the shoulder straps, holds the three-phase mixed jet nozzle and aims it at the target. First, open the powder circuit switch ball valve to spray the super absorbent resin powder material, and then open the water circuit switch ball valve to spray water. After the fire is extinguished, first close the water circuit switch ball valve, and then close the powder circuit switch ball valve. 4) After the fire is extinguished, proceed with the cleanup operation. Open the gas pressure regulating valve and the cleaning gas control valve to allow high-pressure gas to enter the powder pipe of the three-phase mixing jet nozzle and thoroughly clean the residual material in the powder pipe. After cleaning, close the gas pressure regulating valve and the cleaning gas control valve. Then open the top cover of the powder tank and water tank, and use an air gun or high-pressure water gun to clean the powder tank and use an air gun to clean the water tank. After cleaning, ensure that the inside of the tank is dry.

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