Single power multiple range self-priming foaming device

Abstract

The application discloses a single-power multiple times long-range self-suction foaming device, and belongs to the technical field of fire-fighting equipment. The single-power multiple times long-range self-suction foaming device comprises a fire-fighting quick connector, a pipe body coaxially arranged on the fire-fighting quick connector, a throttling assembly arranged between the fire-fighting quick connector and the pipe body and used for adjusting water flow, a nozzle coaxially arranged at the tail end of the pipe body and gradually tapered, a dispersion and rectification disc coaxially arranged in the pipe body and located at the water inlet of the nozzle, a plurality of triangular-shaped flow holes arranged on the dispersion and rectification disc in the circumferential direction, a plurality of link rods gradually expanded and arranged on the outer side of the tail end of the pipe body in the circumferential direction, a first cylinder body provided with a plurality of through holes and arranged at the tail end of the plurality of link rods, two layers of foaming nets coaxially arranged in the first cylinder body, a second cylinder body coaxially and slidingly connected to the outer side of the first cylinder body and used for covering the through holes, and a self-suction liquid assembly arranged on the outer side of the nozzle and used for adding foaming liquid. The single-power multiple times long-range self-suction foaming device can adapt to the fire extinguishing needs of fire sources at different distances, meet the needs of fire prevention and control in limited spaces, and improve the safety of fire extinguishing personnel.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of fire-fighting equipment, and particularly relates to a single-power middle-multiple long-range self-air suction foaming device. BACKGROUND

[0002] A limited space has the characteristics of high sealing degree, relatively concealed space, limited width and quantity of safety exit, etc., which leads to the particularity of the limited space fire: rapid decrease of oxygen content, rapid rise of temperature, difficult smoke exhaust, slow heat dissipation, and difficult emergency rescue, thereby easily causing heavy casualties and property losses. For the limited space fire, the fire extinguishing system is mainly divided into the following types according to the types of fire extinguishing agents and the extinguishing modes: fire hydrant extinguishing system, automatic sprinkler extinguishing system, gas extinguishing system, foam extinguishing system, dry powder extinguishing system and fire extinguisher. The limited space fire develops rapidly and has developed to a certain scale, and it is difficult to extinguish the fire by using a portable fire extinguisher, and the automatic sprinkler extinguishing system and the gas extinguishing system are suitable for fixed places and cannot be targeted according to the real-time situation and position of the fire. The mobile foam extinguishing system has strong adaptability to the terrain and high extinguishing efficiency, and is a good choice. The foam generator is a special foaming device for preparing foam fluid in the foam extinguishing system, and the foam production performance directly determines the final effect of the foam extinguishing implementation. The largest amount of existing low-multiple-middle-multiple combined foam gun has a flow rate of 8 L / s, a foaming multiple of 8.4, a range of 24 m, a foaming multiple of 35.2, and a range of 7.6 m. The domestic middle-multiple foaming gun has a range of not more than 4.5 m at a flow rate of 5 L / s and a foaming multiple of more than 20. It can be seen that the range of the existing middle-multiple foam gun is low, which increases the risk of rescue and fire extinguishing personnel and cannot meet the needs of limited space fire prevention and control. In addition, some existing foam generating devices need an external pressure air source, some need a separate pump for foam agent, and some have large structure size and heavy weight, which are difficult for a single person to operate. These all limit the use of the foam generating device, and cannot quickly respond to the fire at the beginning to carry out fire extinguishing and rescue work. SUMMARY

[0003] The application aims to provide a single-power middle-multiple long-range self-air suction foaming device to solve the above problems in the prior art.

[0004] Technical solution: a single power multiple times long-range self-suction foaming device, comprising a fire quick connector and a pipe body coaxially arranged on the fire quick connector, a throttling assembly for adjusting water flow is arranged between the fire quick connector and the pipe body, the end of the pipe body is coaxially provided with a nozzle in a tapered shape, the inside of the pipe body is coaxially provided with a dispersion flow regulating disc at the water inlet of the nozzle, the dispersion flow regulating disc is provided with a plurality of triangular-shaped flow holes in the circumferential direction, the outside of the end of the pipe body is provided with a plurality of links in an expanding shape in the circumferential direction, the ends of the plurality of links are provided with a first cylinder with a plurality of through holes, the inside of the first cylinder is coaxially provided with two layers of foaming nets, the outside of the first cylinder is coaxially slidably connected with a second cylinder for covering the through holes, the outside of the nozzle is provided with a self-suction liquid assembly for adding foaming liquid.

[0005] By adopting the above technical scheme, the fire quick connector is connected to the water source, at this time the water flow flows in the pipe body to the dispersion flow regulating disc, and is accelerated to flow out through the fan-shaped holes on the dispersion flow regulating disc, and a speed distribution difference is generated on the flow channel, at the same time the water flow flowing through the flow holes generates a certain horizontal velocity component, which increases the turbulent state of the water flow on the back side of the dispersion flow regulating disc, at this time the water flow flows into the nozzle, and due to the tapered shape of the nozzle, the water flow is accelerated twice in the nozzle, further increasing the turbulent state of the water flow, when the water flow is sprayed from the water outlet of the nozzle, the self-suction liquid assembly inside is used to generate negative pressure by using the jet motion, and the foam liquid is automatically sucked into the water flow to form a mixed liquid, which is sprayed out of the nozzle in a dispersed jet motion, which improves the contact area between the mixed liquid and air, a large number of turbulent vortices are formed on the surface of the mixed liquid jet, increasing the ability to wrap air, at this time the annular area of the mixed liquid jet forms a negative pressure area, a large amount of air is sucked into the first cylinder, a large amount of air mixes with the mixed liquid jet and flows into the first cylinder, so that the inner wall surface of the first cylinder forms a negative pressure flow field, and external air is sucked into the cylinder through the plurality of through holes for supplement, when the mixed liquid jet is sprayed on the foaming net surface to form a liquid film, at this time the air continuously blows and shears to form foam, and the foam flow beam is sprayed out of the first cylinder, the water flow is controlled by the adjusting assembly, and the air suction amount is controlled by adjusting the coverage of the second cylinder on the first cylinder opening section, so that the foam range and the foaming multiple are adjusted, the needs of different distances of fire sources are met, the needs of fire prevention in limited space are met, the safety of rescue and fire extinguishing personnel is improved, an external air source and a foam liquid adding pump are not needed, the structure size is small and the weight is light, and single-person operation is convenient.

[0006] Preferably, the diameter of the first cylinder is 200mm-240mm, the axial length of the first cylinder is 2-2.75 times of the diameter, and the axial length of the first cylinder opening section accounts for 35%-45% of the total axial length.

[0007] Preferably, the plurality of through holes are arranged in a circumferential array on the first cylinder body, the plurality of through holes have a hole diameter of 10mm-20mm and a hole pitch of 30mm-60mm.

[0008] Preferably, the foaming net has a shape of a plane or a curved surface, the distance between the two layers of the foaming net is 15mm-25mm, the mesh hole diameter is 0.8mm-1.2mm, and the distance between the first layer of the foaming net and the nozzle water outlet is 300mm-350mm.

[0009] Preferably, a chute is arranged through the top of the second cylinder body in the axial direction, a sliding block is slidably connected inside the chute, the sliding block is fixedly connected to the top of the outer side of the first cylinder body, a handle is arranged on the sliding block, and the handle is fixedly connected to the top of the outer side of the first cylinder body at an end away from the sliding block.

[0010] Preferably, the self-suction liquid assembly comprises an arc-shaped plate coaxially arranged at the end of the pipe body, the arc-shaped plate is located on the outer side of the nozzle, a sector-shaped plate is coaxially arranged on the side of the arc-shaped plate away from the pipe body, two top plates adapted to the nozzle are arranged on the top of the sector-shaped plate, an incomplete closed liquid suction cavity is formed between the arc-shaped plate, the sector-shaped plate, the two top plates and half of the tapered surface of the nozzle, a liquid suction pipe connected to the liquid suction cavity is arranged on the bottom of the arc-shaped plate, and a throttle valve is arranged on the liquid suction pipe.

[0011] Preferably, the distance between the sector-shaped plate and the nozzle water outlet is 2mm-8mm.

[0012] Preferably, the ratio of the flow rate of the dispersion rectifier plate to the flow rate of the pipe body is 0.375-0.495:1, and the axial thickness of the dispersion rectifier plate is 3mm-5mm.

[0013] Preferably, the throttling assembly comprises a shell coaxially arranged between the fire-fighting quick connector and the pipe body, a spiral steel sheet is coaxially arranged inside the shell, a sealing ring is coaxially arranged on the outer side of the steel sheet, the sealing ring is fixedly connected to the inner wall of the shell on both sides, a rod body is threadedly connected to the bottom of the shell and extends to the inner side of the steel sheet between the two end portions through the sealing ring, a chain disc is coaxially arranged on the top end of the rod body, and chains engaged with the chain disc are arranged on the two end portions of the inner side of the steel sheet.

[0014] In summary, the beneficial effects of the present application are:

[0015] When the water flow is sprayed from the water outlet of the nozzle, the jet flow motion is used to generate negative pressure in the self-suction liquid assembly, and the foam liquid is automatically sucked into the water flow to form a mixed liquid, which is sprayed from the nozzle and presents a dispersed jet flow motion, thereby improving the contact area between the mixed liquid and air, a large number of turbulent vortices are formed on the surface of the mixed liquid jet flow, the air entraining capacity is increased, at this time, the annular area of the mixed liquid jet flow forms a negative pressure area, a large amount of air is sucked into the first cylinder, a large amount of air is mixed with the mixed liquid jet flow to flow into the first cylinder, so that the inner wall surface of the first cylinder forms a negative pressure flow field, and the external air is sucked into the cylinder through a plurality of through holes for supplement, thereby not needing an external air source and a foam liquid adding pump, so that the structure size is small and the weight is light, single-person operation is facilitated, rapid response at the beginning of the fire is realized, and fire extinguishing and rescue work is carried out.

[0016] The water flow is controlled by the adjusting assembly, the air suction amount is controlled by the second cylinder covering the opening section of the first cylinder, the foam range and the foaming multiple are adjusted, the fire extinguishing needs of different distances are adapted, the needs of fire prevention and control in a limited space are met, and the safety of the rescue fire extinguishing personnel is improved.

[0017] The adjusting assembly can adjust the water flow without changing the main direction of the water flow, the resistance loss is reduced, the flow adjustment range is wide, and the flow pressure change is uniform.

[0018] The self-suction liquid assembly adds the foaming agent by using negative pressure, low-resistance addition of the foaming liquid is realized, and disturbance to the jet flow is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a structural schematic diagram of the present application;

[0020] Figure 2 is a top view of the present application;

[0021] Figure 3 is a structural schematic diagram of the self-suction liquid assembly of the present application;

[0022] Figure 4 is a structural schematic diagram of the steel sheet of the present application;

[0023] Figure 5 is a structural schematic diagram of the dispersion rectifier plate of the present application.

[0024] The figure marks are as follows: 1, a fire-fighting quick connector; 2, a pipe body; 3, a shell; 4, a steel sheet; 5, a sealing ring; 6, a rod body; 7, a chain; 8, a chain disc; 9, a nozzle; 10, a dispersion rectifier plate; 11, a flow passage; 12, an arc plate; 13, a sector plate; 14, a top plate; 15, a liquid suction pipe; 16, a throttle valve; 17, a liquid suction cavity; 18, a connecting rod; 19, a first cylinder; 20, a second cylinder; 21, a through hole; 22, a sliding groove; 23, a sliding block; 24, a handle; 25, a foaming net. Embodiments

[0025] In the following description, numerous specific details are set forth in order to provide a thorough understanding of the application. However, it will be apparent to one skilled in the art that the application can be practiced without one or more of these specific details. In other instances, well-known features have not been described in detail to avoid obscuring the application.

[0026] A single power multiple times long-range self-suction foaming device, such as Figure 1 and Figure 2 , comprising a fire quick connector 1 and a pipe body 2 coaxially arranged on the fire quick connector 1, a throttle assembly for adjusting water flow is arranged between the fire quick connector 1 and the pipe body 2, a tapered nozzle 9 is coaxially arranged at the end of the pipe body 2, a dispersion flow plate 10 is coaxially arranged inside the pipe body 2 at the water inlet of the nozzle 9, such as Figure 5 , the dispersion flow plate 10 is circumferentially provided with a plurality of triangular-shaped flow holes 11, a plurality of link rods 18 in the shape of a gradual expansion are circumferentially arranged outside the end of the pipe body 2, a first cylinder 19 with a plurality of through holes 21 is arranged at the end of the plurality of link rods 18, two layers of foaming nets 25 are coaxially arranged inside the first cylinder 19, a second cylinder 20 for covering the through holes 21 is coaxially and slidingly connected outside the first cylinder 19, a self-suction liquid assembly for adding foaming liquid is arranged outside the nozzle 9.

[0027] such as Figure 1 and Figure 2When the fire quick connector 1 is connected with the fire hydrant, water flows in the pipe body 2 to the dispersion rectifier disc 10, and is accelerated to flow out through the fan-shaped holes on the dispersion rectifier disc 10, so that a difference in velocity distribution is generated on the flow channel, and the water flowing through the flow holes 11 generates a certain horizontal velocity component, which increases the turbulent state of the water flow on the back side of the dispersion rectifier disc 10. At this time, the water flow flows into the nozzle 9, and the water flow is accelerated again in the nozzle 9 due to the tapered shape of the nozzle 9, so that the turbulent state of the water flow is further increased. When the water flow is sprayed from the water outlet of the nozzle 9, the self-suction liquid assembly generates a negative pressure inside by using the jet motion, so that the foam liquid is automatically sucked into the water flow to form a mixed liquid, which is sprayed out of the nozzle 9 in a dispersed jet motion, so that the contact area between the mixed liquid and air is increased, a large number of turbulent vortices are formed on the surface of the mixed liquid jet, and the air entraining capacity is increased. At this time, a large amount of air is sucked into the first cylinder 19 in the annular area of the mixed liquid jet, and the mixed flow of the mixed liquid jet and the air flows into the first cylinder 19, so that a negative pressure flow field is formed on the inner wall surface of the first cylinder 19, and the air is sucked into the cylinder through a plurality of through holes 21. When the mixed liquid jet is sprayed on the foaming net 25 to form a liquid film, the foam is formed by the continuous blowing and shearing collision of air at this time, and the foam flow is sprayed out of the first cylinder 19. By adjusting the water flow through the adjusting assembly and adjusting the coverage of the opening section of the second cylinder 20 on the first cylinder 19 to control the air suction amount, the adjustment of the foam range and the foaming multiple is realized, the needs of fire extinguishing at different distances are met, the needs of fire prevention in a limited space are met, the safety of the rescue and fire extinguishing personnel is improved, and the structure size is small and the weight is light, so that single-person operation is facilitated.

[0028] As Figure 1 and Figure 2 The foaming net 25 is made of metal or stainless steel, and a cotton fiber net or a nylon net can be covered on the surface of the foaming net 25 to form a composite net, so that the residence time of the mixed liquid on the foaming net 25 is prolonged, the time of the continuous blowing and shearing collision of the air on the mixed liquid is increased, and the foaming effect is improved.

[0029] As Figure 1 and Figure 2 Preferably, the diameter of the first cylinder 19 is 200mm-240mm, the axial length of the first cylinder 19 is 2-2.75 times of the diameter, and the axial length of the opening section of the first cylinder 19 accounts for 35%-45% of the total axial length.

[0030] As Figure 1 and Figure 2 The plurality of through holes 21 are distributed in a circumferential array on the first cylinder 19, the diameter of the plurality of through holes 21 is 10mm-20mm, and the hole distance is 30mm-60mm.

[0031] As Figure 1 andFigure 2 The shape of the foaming net 25 is planar or curved, the distance between the two layers of foaming net 25 is 15mm-25mm, the mesh aperture is 0.8mm-1.2mm, and the distance between the first layer of foaming net 25 and the water outlet of the nozzle 9 is 300mm-350mm.

[0032] As Figure 1 And Figure 2 The top of the second cylinder body 20 is provided with a sliding groove 22 in the axial direction, and the sliding block 23 is slidably connected in the sliding groove 22. The sliding block 23 is fixedly connected to the outer top of the first cylinder body 19. The handle 24 is arranged on the sliding block 23. The end of the handle 24 away from the sliding block 23 is fixedly connected to the outer top of the first cylinder body 19. The sliding groove 22 and the sliding block 23 prevent the second cylinder body 20 from rotating on the outer side of the first cylinder body 19. The handle 24 facilitates the rescue and fire extinguishing personnel to hold the device.

[0033] As Figure 1 And Figure 3 The self-suction assembly includes an arc plate 12 coaxially arranged at the end of the pipe body 2. The arc plate 12 is located on the outer side of the nozzle 9. A sector plate 13 is coaxially arranged on the side of the arc plate 12 away from the pipe body 2. Two top plates 14 adapted to the nozzle 9 are arranged on the top of the sector plate 13. An incomplete suction cavity 17 is formed between the arc plate 12, the sector plate 13, the two top plates 14, and half of the tapered surface of the nozzle 9. A suction pipe 15 is arranged at the bottom of the arc plate 12 and connected to the suction cavity 17. A throttle valve 16 is arranged on the suction pipe 15. When the throttle valve 16 is opened, the jet flow causes negative pressure in the suction cavity 17. At this time, the foam liquid is automatically sucked into the suction cavity 17 through the suction pipe 15 and mixed with the water flow to form a mixed liquid.

[0034] As Figure 1 And Figure 3 The distance between the sector plate 13 and the water outlet of the nozzle 9 is 2mm-8mm.

[0035] As Figure 1 And Figure 5 The ratio of the flow rate of the dispersion and rectification disc 10 to the flow rate of the pipe body 2 is 0.375-0.495:1. The axial thickness of the dispersion and rectification disc 10 is 3mm-5mm.

[0036] As Figure 1 And Figure 4The throttle assembly comprises a shell 3 coaxially arranged between the fire hose coupling 1 and the pipe body 2, a spiral steel sheet 4 coaxially arranged inside the shell 3, a sealing ring 5 coaxially arranged outside the steel sheet 4, the sealing ring 5 fixedly connected with the inner wall of the shell 3 at both sides, a rod body 6 threadedly connected with the bottom of the shell 3, the rod body 6 extending to the inside of the steel sheet 4 between both ends of the steel sheet 4 through the sealing ring 5, a chain disc 8 coaxially arranged at the top end of the rod body 6, a chain 7 arranged at both ends of the inside of the steel sheet 4 and engaged with the chain disc 8, and the rod body 6 rotates clockwise, at this time, the chain disc 8 rotates clockwise driven by the rod body 6, under the action of the chain 7 and the chain disc 8, the steel sheet 4 is contracted as a whole, at the same time, the elasticity of the sealing ring 5 makes the sealing ring 5 always adhere to the outside of the steel sheet 4, at this time, the flow passage formed by the steel sheet 4 and the sealing ring 5 is simultaneously reduced, on the contrary, the flow passage is increased, thereby the water flow is adjusted under the condition of not changing the water flow direction, the resistance loss is reduced, the flow adjustment range is wide and the flow pressure change is uniform.

[0037] Working principle: connect the fire hydrant with the quick coupling 1, at this time the water flows in the pipe body 2 to the dispersion rectifier disc 10, and accelerates out through the fan-shaped holes on the dispersion rectifier disc 10, and generates a speed distribution difference on the flow channel, at the same time the water flow through the flow hole 11 generates a certain horizontal velocity component, which increases the turbulent state of the water flow on the back side of the dispersion rectifier disc 10, at this time the water flow flows into the nozzle 9, because the nozzle 9 is tapered, the water flow is accelerated in the nozzle 9, further increasing the turbulent state of the water flow, when the water flow is sprayed from the water outlet of the nozzle 9, the suction cavity 17 inside is made to generate negative pressure by using the jet motion, at this time the throttle valve 16 is opened, the foam liquid is automatically sucked into the suction cavity 17 through the suction pipe 15, and a mixed liquid is formed with the water flow, and is sprayed out of the nozzle 9 in a dispersed jet motion, which improves the contact area between the mixed liquid and the air, a large number of turbulent vortices are formed on the surface of the mixed liquid jet, which increases the air entraining capacity, at this time the annular area of the mixed liquid jet forms a negative pressure area, a large amount of air is sucked into the first cylinder 19, a large amount of air mixes with the mixed liquid jet and flows into the first cylinder 19, so that the inner wall surface of the first cylinder 19 forms a negative pressure flow field, and air is sucked into the cylinder through a plurality of through holes 21, when the mixed liquid jet is sprayed on the foaming net 25 to form a liquid film, at this time the air continuously blows and shears to form foam, and the foam flow is sprayed out of the first cylinder 19, at this time the rod body 6 is rotated clockwise, at this time the rod body 6 drives the chain disc 8 to rotate clockwise, under the action of the chain 7 and the chain disc 8, at this time the steel sheet 4 is contracted as a whole, and the elastic sealing ring 5 is always attached to the outside of the steel sheet 4 at this time, at this time the flow channel formed by the steel sheet 4 and the sealing ring 5 is simultaneously reduced, and vice versa, the flow channel is increased, thereby adjusting the water flow without changing the direction of the water flow, reducing the resistance loss, the flow adjustment range is wide and the flow pressure change is uniform, at the same time, the second cylinder 20 adjusts the coverage of the first cylinder 19 to control the air suction amount, realizes the adjustment of the foam range and the foaming multiple, adapts to the fire extinguishing needs of different distances, meets the needs of limited space fire prevention, improves the safety of rescue and fire extinguishing personnel, does not need external air source and foam liquid adding pump, has small structure size and light weight, is convenient for single person operation, realizes quick response at the beginning of the fire, and performs fire extinguishing and rescue work.

[0038] The preferred embodiments of the application are described in detail above in combination with the drawings, but the application is not limited to the specific details in the above-described embodiments, and various equivalent transformations can be made to the technical solutions of the application within the technical concept of the application, and these equivalent transformations all belong to the protection scope of the application.

Claims

1. A single power multiple far range self-suction foaming device, comprising a fire quick connector (1) and a pipe body (2) coaxially arranged on the fire quick connector (1), characterized in that, The fire hose coupling (1) is provided with a throttle assembly for adjusting water flow between the fire hose coupling (1) and the pipe body (2), the end of the pipe body (2) is coaxially provided with a nozzle (9) in a tapered shape, the inside of the pipe body (2) is coaxially provided with a dispersion flow straightener (10) at the water inlet of the nozzle (9), the dispersion flow straightener (10) is provided with a plurality of triangular-shaped flow holes (11) in a circumferential direction, the outside of the end of the pipe body (2) is provided with a plurality of connecting rods (18) in an expanding shape in a circumferential direction, the ends of the plurality of connecting rods (18) are provided with a first cylinder (19) with a plurality of through holes (21), the inside of the first cylinder (19) is coaxially provided with two layers of foaming nets (25), the outside of the first cylinder (19) is coaxially slidably connected with a second cylinder (20) for covering the through holes (21), the outside of the nozzle (9) is provided with a self-suction liquid assembly for adding foaming liquid. The self-suction liquid assembly comprises an arc-shaped plate (12) coaxially arranged at the end of the pipe body (2), the arc-shaped plate (12) is located outside the nozzle (9), the side of the arc-shaped plate (12) away from the pipe body (2) is coaxially provided with a sector-shaped plate (13), the top of the sector-shaped plate (13) is provided with two top plates (14) matched with the nozzle (9), an incomplete suction cavity (17) is formed between the arc-shaped plate (12), the sector-shaped plate (13), the two top plates (14) and half of the tapered surface of the nozzle (9), the bottom of the arc-shaped plate (12) is provided with a liquid suction pipe (15) connected with the suction cavity (17), the liquid suction pipe (15) is provided with a throttle valve (16). The throttle assembly comprises a shell (3) coaxially arranged between the fire hose coupling (1) and the pipe body (2), the inside of the shell (3) is coaxially provided with a spiral steel sheet (4), the outside of the steel sheet (4) is coaxially provided with a sealing ring (5), the two sides of the sealing ring (5) are fixedly connected with the inner wall of the shell (3), the bottom of the shell (3) is threadedly connected with a rod body (6) penetrating through, the top end of the rod body (6) extends to the inside of the steel sheet (4) between the two ends, the top end of the rod body (6) is coaxially provided with a chain disc (8), the two ends of the inside of the steel sheet (4) are provided with a chain (7) engaged with the chain disc (8), the chain disc (8) is driven to rotate clockwise by the rod body (6), under the action of the chain (7) and the chain disc (8), the steel sheet (4) is contracted as a whole, at the same time, the elasticity of the sealing ring (5) makes the sealing ring (5) always fit on the outside of the steel sheet (4), at this time, the flow channel formed by the steel sheet (4) and the sealing ring (5) is simultaneously reduced, and vice versa.

2. A single powered multiple far range self-venting foaming device according to claim 1, wherein, The diameter of the first cylinder (19) is 200mm-240mm, the axial length of the first cylinder (19) is 2-2.75 times of its diameter, and the axial length of the opening section of the first cylinder (19) accounts for 35%-45% of its total axial length.

3. A single powered multiple far range self-foaming device according to claim 1, wherein, A plurality of through holes (21) are arranged in a circumferential array on the first cylinder (19), the diameter of the plurality of through holes (21) is 10mm-20mm, and the hole distance is 30mm-60mm.

4. A single powered multiple far range self-venting foaming device according to claim 1, wherein, The shape of the foaming net (25) is flat or curved, the distance between the two layers of the foaming net (25) is 15-25 mm, the mesh aperture is 0.8-1.2 mm, and the distance between the first layer of the foaming net (25) and the water outlet of the nozzle (9) is 300-350 mm.

5. A single powered multiple far range self-foaming device according to claim 1, wherein, An axial chute (22) is arranged at the top of the second cylinder (20), a sliding block (23) is slidably connected in the chute (22), the sliding block (23) is fixedly connected to the outside top of the first cylinder (19), a handle (24) is arranged on the sliding block (23), and the end of the handle (24) away from the sliding block (23) is fixedly connected to the outside top of the first cylinder (19).

6. A single powered multiple far range self-foaming device according to claim 1, wherein, The distance between the fan-shaped plate (13) and the water outlet of the nozzle (9) is 2-8 mm.

7. A single powered multiple far range self-foaming device according to claim 1, wherein, The ratio of the flow rate of the dispersion rectifier plate (10) to the flow rate of the pipe body (2) is 0.375-0.495:1, and the axial thickness of the dispersion rectifier plate (10) is 3-5 mm.

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