Efficient dry powder and foam mixing device

Abstract

The invention relates to the field of dry powder foam fire extinguishing, in particular to an efficient dry powder foam mixing device. Comprising a dry powder tank and a negative pressure machine, a main body of the dry powder tank is of a cylindrical bin body structure, a powder outlet is formed in the upper portion of the middle of the dry powder tank, the powder outlet is communicated with a powder outlet pipe with the horizontal upper portion, one side of the powder outlet pipe is communicated with a negative pressure machine, and the other end of the powder outlet pipe is a mixed injection opening. A material conveying pipe is vertically arranged in the middle of the dry powder tank, the upper portion of the material conveying pipe is fixed to the upper end of the dry powder tank, the lower portion of the material conveying pipe is not in contact with the dry powder tank, a material suction opening is formed, and the material suction opening generates negative pressure through a negative pressure machine to suck out materials. The device can well send out dry powder, the situation that the dry powder cannot be sent out due to long-term non-condensation is avoided, the structure is simple, and workers can conveniently overhaul and clean the dry powder.

Description

Technical Field

[0001] The invention relates to the field of dry powder foam fire extinguishing, in particular to a high-efficiency dry powder foam mixing device. Background Art

[0002] When using a dry powder fire extinguisher to extinguish a fire of flammable or combustible liquids, aim at the main part of the flame and sweep it. If the liquid fire being extinguished is burning in a flowing manner, aim at the root of the flame and sweep it from near to far, and sweep it left and right until the flame is completely extinguished. If the flammable liquid is burning in a container, the user should aim at the root of the flame and shake it left and right so that the sprayed dry powder flow covers the entire surface of the container opening; when the flame is driven out of the container, the user should continue to spray until the flame is completely extinguished. When extinguishing a fire of flammable liquid in a container, be careful not to spray the nozzle directly at the liquid surface to prevent the impact force of the jet from splashing the flammable liquid and expanding the fire, making it difficult to extinguish the fire. If the flammable liquid burns in a metal container for too long, the wall temperature of the container is higher than the auto-ignition point of the flammable liquid being extinguished. At this time, it is very easy to cause the fire to reignite after extinguishing. If used in conjunction with a foam fire extinguisher, the fire extinguishing effect will be better.

[0003] Carbon dioxide fire extinguishers are mainly used to put out the initial fire of valuable equipment, archives, instruments and meters, electrical equipment below 600 volts and oils. When using, you should first lift the fire extinguisher to the fire site, put down the fire extinguisher, pull out the safety pin, hold the handle at the root of the horn with one hand, and hold the pressure handle of the opening and closing valve with the other hand. For carbon dioxide fire extinguishers without spray hoses, the horn should be turned up 70-90 degrees. When using, you cannot directly grasp the outer wall of the horn or the metal connecting pipe with your hands to prevent frostbite. When using a carbon dioxide fire extinguisher, if it is used outdoors, you should choose to spray in the upwind direction; if it is used in a narrow space indoors, the operator should leave quickly after extinguishing the fire to prevent suffocation.

[0004] Dry powder foam fire extinguisher, the fire extinguishing principle is that when extinguishing a fire, it can spray a large amount of foam, which can adhere to the combustibles, isolating the combustibles from the air and achieving the purpose of extinguishing the fire.

[0005] Traditional fire extinguishing devices generally use one of water, dry powder, carbon dioxide or foam as a fire extinguishing agent. The principle of a single fire extinguishing agent is single, the fire extinguishing effect is limited, and it has certain limitations. For example, dry powder mainly covers the surface of the combustible material to isolate the combustible material from the air, but it cannot reduce the ambient temperature and has poor anti-reignition ability. Water mainly relies on its own evaporation to reduce the ambient temperature to achieve the purpose of fire extinguishing. It takes a long time to extinguish the fire and has low efficiency. Therefore, the traditional fire extinguishing device has a single fire extinguishing method and has certain limitations. Some fire extinguishing devices are gas-driven. For multiple storage tanks that need to be driven, multiple pressure-controlled gas cylinders are usually set, resulting in equipment redundancy and increased costs. At the same time, the process of some fire extinguishing devices is relatively fixed, and the process cannot be changed according to different usage environments. Summary of the invention

[0006] The purpose of the present invention is to overcome the shortcomings of the prior art, meet the actual needs, and provide a high-efficiency dry powder foam mixing device, including a dry powder tank and a negative pressure machine; the main body of the dry powder tank is a cylindrical warehouse structure, and a powder outlet is arranged above the middle of the dry powder tank, and the powder outlet is connected to a horizontal powder outlet pipe above, one side of the powder outlet pipe is connected to a negative pressure machine, and the other end of the powder outlet pipe is a mixing injection port.

[0007] A feeding pipe is vertically arranged in the middle of the dry powder tank. The top of the feeding pipe is fixed to the upper end of the dry powder tank, and the bottom of the feeding pipe does not contact the dry powder tank, forming a suction port. The suction port generates negative pressure through a negative pressure machine to suck out the material.

[0008] A spiral conveying rod is vertically arranged in the material conveying pipe, and the spiral conveying rod is connected to the motor at the bottom of the dry powder tank to drive it to convey materials upward.

[0009] The top of the dry powder tank is a completely penetrating structure.

[0010] A piston cover which can move up and down is arranged at the opening above the dry powder tank. The piston cover moves downward as the material is delivered and moves upward as the material is injected.

[0011] A material injection port is provided on one side of the piston cover, and a pressure relief port is provided on the other side of the piston cover. Both the material injection port and the pressure relief port are provided with screw covers. When the material is injected into the material injection port, the pressure relief port is opened to release pressure at the same time.

[0012] An auxiliary cylinder is arranged above the piston cover, and a pneumatic rod is arranged at the bottom of the pneumatic cylinder of the auxiliary cylinder. The pneumatic rod is fixedly connected to the piston cover to drive it to move up and down.

[0013] The beneficial effects of the present invention are: The device can deliver dry powder well without condensing and being unable to deliver the powder due to long-term non-use. The device has a simple structure and is convenient for workers to inspect and clean. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention is further described below with reference to the accompanying drawings and implementation examples.

[0015] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 It is a cross-sectional view of the auxiliary groove of the present invention. DETAILED DESCRIPTION

[0016] The present invention is further described below in conjunction with the accompanying drawings and embodiments: See also Figure 1-2 .

[0017] The present invention discloses a high-efficiency dry powder foam mixing device, comprising a dry powder tank 1 and a negative pressure machine 2; the main body of the dry powder tank is a cylindrical warehouse structure, a powder outlet 3 is arranged above the middle of the dry powder tank, the powder outlet 3 is connected to a horizontal powder outlet pipe 4 above, one side of the powder outlet pipe is connected to the negative pressure machine 2, and the other end of the powder outlet pipe is a mixing injection port 5.

[0018] A feeding pipe 6 is vertically arranged in the middle of the dry powder tank. The upper part of the feeding pipe is fixed to the upper end of the dry powder tank, and the lower part of the feeding pipe does not contact the dry powder tank, forming a suction port 7. The suction port generates negative pressure through a negative pressure machine to suck out the material.

[0019] A screw conveying rod 8 is vertically arranged in the conveying pipe, and the screw conveying rod is connected to a motor 9 at the bottom of the dry powder tank to drive it to convey materials upward.

[0020] The top of the dry powder tank is a completely penetrating structure.

[0021] A piston cover 10 that can move up and down is arranged at the opening above the dry powder tank. The piston cover moves downward as the material is delivered and moves upward as the material is injected.

[0022] A material injection port 11 is provided on one side of the piston cover, and a pressure relief port 12 is provided on the other side of the piston cover. Both the material injection port and the pressure relief port are provided with a screw cover 13. When the material is injected into the material injection port, the pressure relief port is opened to release pressure at the same time.

[0023] An auxiliary cylinder 14 is arranged above the piston cover, and a pneumatic rod 15 is arranged at the bottom of the pneumatic cylinder of the auxiliary cylinder. The pneumatic rod is fixedly connected to the piston cover to drive it to move up and down. The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent transformation made by using the contents of the present invention specification and drawings or directly or indirectly applied in related technical fields are also included in the patent protection scope of the present invention.

Claims

1. A high-efficiency dry powder foam mixing device, characterized in that: The invention comprises a dry powder tank (1) and a negative pressure machine (2); the main body of the dry powder tank is a cylindrical silo structure, a powder outlet (3) is arranged at the upper middle of the dry powder tank, the powder outlet (3) is connected to a powder outlet pipe (4) at the upper level, one side of the powder outlet pipe is connected to the negative pressure machine (2), and the other end of the powder outlet pipe is a mixing injection port (5).

2. A high-efficiency dry powder foam mixing device according to claim 1, characterized in that: A feed pipe (6) is vertically arranged in the middle of the dry powder tank. The upper part of the feed pipe is fixed to the upper end of the dry powder tank, and the lower part of the feed pipe does not contact the dry powder tank, forming a suction port (7). The suction port generates negative pressure through a negative pressure machine to suck out the material.

3. A high-efficiency dry powder foam mixing device according to claim 2, characterized in that: A spiral conveying rod (8) is vertically arranged in the material conveying pipe, and the spiral conveying rod is connected to a motor (9) at the bottom of the dry powder tank to drive the motor to convey materials upward.

4. A high-efficiency dry powder foam mixing device according to claim 1, characterized in that: The top of the dry powder tank is a completely penetrating structure.

5. A high-efficiency dry powder foam mixing device according to claim 4, characterized in that: A piston cover (10) that can move up and down is provided at the opening above the dry powder tank, and the piston cover moves downward as the material is delivered, and moves upward as the material is injected.

6. A high-efficiency dry powder foam mixing device according to claim 5, characterized in that: A material injection port (11) is provided on one side of the piston cover, and a pressure relief port (12) is provided on the other side of the piston cover. The material injection port and the pressure relief port are both provided with a screw cover (13). When material is injected into the material injection port, the pressure relief port is opened to release pressure at the same time.

7. A high-efficiency dry powder foam mixing device according to claim 5, characterized in that: An auxiliary cylinder (14) is arranged above the piston cover, and a pneumatic rod (15) is arranged at the bottom of the pneumatic cylinder of the auxiliary cylinder. The pneumatic rod is fixedly connected to the piston cover to drive the piston cover to move up and down.

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