CN210145353U

CN210145353U - High power foam generator

Info

Publication number: CN210145353U
Application number: CN201920715963.8U
Authority: CN
Inventors: 杨峰
Original assignee: Shanghai Huarui Rescue Equipment Co Ltd
Current assignee: Shanghai Huarui Rescue Equipment Co Ltd
Priority date: 2019-05-16
Filing date: 2019-05-16
Publication date: 2020-03-17
Anticipated expiration: 2029-05-16

Abstract

The utility model discloses a high-power foam generator, which relates to the field of fire-fighting tools and comprises a guide cylinder, a foaming net and a nozzle, wherein the foaming net and the nozzle are respectively arranged at openings at two ends of the guide cylinder; the one end that the guide cylinder kept away from the foaming net is fixed with the liquid distribution pipe, is connected with the feed liquor pipe on the liquid distribution pipe, and the nozzle evenly is provided with a plurality of on liquid distribution pipe. The utility model provides a simple structure, the simple operation, job stabilization, the foaming gauge height to help improving the high power foam generator of fire extinguishing effect.

Description

High power foam generator

Technical Field

The utility model relates to a fire control instrument field, specifically speaking, it relates to a high power foam generator.

Background

The foam generator is a key device of the foam fire extinguishing system. Known high power foam generators consist of a hydraulic turbine, a proportioner, a nozzle and a fan. When the fire extinguisher works, pressure water and foam liquid entering the generator are mixed according to a required proportion and then are uniformly sprayed to a foaming net in an atomizing mode through the nozzle, a layer of foam mixed liquid film is formed on the inner surface of the net, the mixed liquid film is blown into a large amount of foam aggregates by airflow sent by the fan, the foam mixed liquid film is used for rapidly and effectively extinguishing A-type or B-type fire, the drooling fire of liquefied petroleum gas and liquefied natural gas can be effectively controlled, the fire extinguisher is high in fire extinguishing speed, low in cost, reliable in work and convenient to operate, and the fire extinguisher is suitable for rescuing large-area fire in limited space such as an oil depot, a warehouse, a liquefied gas station and the like.

In prior art solutions, the nozzle is usually placed inside the foam generator and against the foaming web; the foam mixed liquid can directly spray on the foaming net after the nozzle is sprayed out, the contact time of the foam mixed liquid and the air is short, the dissolving amount of the air in the foam mixed liquid is insufficient, and the foaming amount is greatly influenced.

SUMMERY OF THE UTILITY MODEL

To the technical problem, the utility model aims at providing a high power foam generator realizes the abundant contact of the mixed liquid of foam and air, effectively improves the foaming volume, guarantees fire control effect.

In order to achieve the above purpose, the utility model provides a following technical scheme:

a high-power foam generator comprises a guide cylinder, a foaming net and a nozzle, wherein the foaming net and the nozzle are respectively arranged at openings at two ends of the guide cylinder; a liquid distribution pipe is fixed at one end of the guide cylinder, which is far away from the foaming net, a liquid inlet pipe is connected to the liquid distribution pipe, and a plurality of nozzles are uniformly arranged on the liquid distribution pipe.

By adopting the technical scheme, the foaming net and the nozzle are arranged at two ends of the guide cylinder, the distance between the guide cylinder and the nozzle is increased, and the contact time of the foam mixed liquid and air is prolonged; simultaneously, evenly set up a plurality of nozzles on joining in marriage the liquid pipe for foam mixed liquid can be through the even blowout of a plurality of nozzles, not only helps realizing the abundant contact of foam mixed liquid and air, still can improve the speed of flowing back. Through the mode, the dissolving amount of air in the foam mixed liquid can be effectively improved, and the final foaming amount is further ensured.

The utility model discloses further set up to: the liquid distribution pipe comprises an annular pipe and an inner pipe fixedly arranged on the inner side of the annular pipe, and the inner pipe is respectively communicated with the annular pipe and the liquid inlet pipe; the nozzle is evenly provided with a plurality of on the circumference of annular pipe.

Through adopting above-mentioned technical scheme, the foam mixes liquid and gets into the inner tube through the feed liquor pipe to and flow into the annular tube from the inner tube, finally spout through each nozzle, not only help realizing the abundant contact of foam mixed liquid and air, can also improve flowing back speed.

The utility model discloses further set up to: the annular pipe is fixed with a plurality of connecting pieces, each connecting piece is evenly distributed in the circumference, and the annular pipe is fixedly connected with one adjacent end of the guide cylinder through each connecting piece.

Through adopting above-mentioned technical scheme, each connecting piece can fully guarantee the stability of the installation of joining in marriage the liquid pipe.

The utility model discloses further set up to: the liquid distribution pipe is positioned outside the guide cylinder, and a reserved gap is formed between the adjacent end parts of the liquid distribution pipe and the guide cylinder.

Through adopting above-mentioned technical scheme, the reservation clearance helps realizing the abundant contact of air and foam mixed liquid, and then improves the dissolved quantity of air in the foam mixed liquid, finally improves the foaming volume.

The utility model discloses further set up to: the foaming net is enclosed into a hollow round platform type structure, the large end opening of the foaming net is fixedly sleeved at the opening of the end, far away from the nozzle, of the guide cylinder, and the small end of the foaming net is far away from the guide cylinder and is of an enclosed type structure.

By adopting the technical scheme, the foaming net is arranged to be a hollow round table structure, and the foam mixed liquid sprayed by the nozzle cannot directly reach the foaming net, so that the contact time of the foam mixed liquid and air is prolonged; further, since a part of the foam liquid mixture spreads along the surface of the foaming net when the foam liquid mixture hits the foaming net, this arrangement also contributes to enlarging the contact area between the foam liquid mixture and the air, and eventually, the foaming amount can be increased.

The utility model discloses further set up to: the included angle of two opposite buses on the circular table surrounded by the foaming net is 20-25 degrees.

By adopting the technical scheme, the included angle of the two opposite buses of the circular truncated cone is strictly controlled, so that the sufficient contact time between the foam mixed liquid and the air is ensured while the sufficient contact area between the foam mixed liquid and the foaming net is ensured.

The utility model discloses further set up to: an inner net body is fixed on one side of the foaming net away from the guide cylinder; the inner net body is enclosed into a round table type structure, the large end of the inner net body is fixed with the small end of the foaming net, and the small end of the inner net body is located inside the foaming net and close to the guide cylinder.

By adopting the technical scheme, when the foam mixed liquid impacts on the inner wall of the foaming net, part of the foam mixed liquid can be reflected downwards to the inner net body and is spread out again on the inner net body, so that secondary foaming is realized, and the foaming quantity is further improved.

The utility model discloses further set up to: and a spiral guide strip is spirally wound on the outer side wall of the inner net body.

Through adopting above-mentioned technical scheme, through set up the spiral gib block on internal network lateral wall, be difficult to on the internal network body at the very first time through internal network exhaust foam mixed liquid can follow the outer lateral wall of internal network spiral gib block and slide gradually. In the process, the spiral guide strip can further prolong the contact time of the foam mixed liquid and air, and is beneficial to improving the foaming amount.

To sum up, the utility model discloses following beneficial effect has:

1. the foaming net and the nozzles are respectively arranged at two ends of the guide cylinder and matched with the plurality of nozzles uniformly arranged on the liquid distribution pipe, so that the foam mixed liquid and air are fully extruded, the foaming amount is ensured, and the liquid discharge speed is improved;

2. the contact area of the foam mixed liquid and the air is further enlarged by utilizing the circular truncated cone-shaped foaming net and matching with the inner net body arranged in the circular truncated cone-shaped foaming net, and the foaming amount is improved.

Drawings

Fig. 1 is a schematic overall structure diagram of a first embodiment of the present invention;

FIG. 2 is an axial view of a spray assembly according to a first embodiment of the present invention;

fig. 3 is an exploded view of an embodiment of the present invention, which is mainly used to embody a nozzle and a rotor;

FIG. 4 is an axial view of a rotary plate according to an embodiment of the present invention;

fig. 5 is a schematic structural view of a second embodiment of the present invention, which is mainly used for embodying a spiral guide bar.

Reference numerals: 1. a guide cylinder; 2. a foamed web; 21. an inner net body; 3. a liquid spray assembly; 4. a liquid distribution pipe; 41. an annular tube; 42. an inner tube; 43. a liquid outlet; 5. a nozzle; 51. a liquid ejection hole; 52. a liquid inlet; 6. a liquid inlet pipe; 61. a pressure gauge; 7. a connecting plate; 8. reserving a gap; 9. rotating the sheet; 91. a guide ramp; 911. a liquid preparation tank; 92. a partition plate; 10. a helical guide strip.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings and examples.

The first embodiment is as follows:

referring to the attached figure 1, the high-power foam generator comprises a guide cylinder 1, wherein the guide cylinder 1 is of a hollow cylindrical structure, and two ends of the guide cylinder 1 are open; meanwhile, the two ends of the guide cylinder 1 are respectively provided with a foaming net 2 and a liquid spraying assembly 3. In actual operation, the liquid spraying assembly 3 sprays foam mixed liquid formed by mixing pressure water and foam liquid towards the foaming net 2; in the process that the foam mixed liquid passes through the guide cylinder 1, the foam mixed liquid can be fully contacted with the air, and finally the foam mixed liquid can form a large amount of foam aggregates when passing through small holes in the foaming net 2 for fire fighting and extinguishment.

Referring to fig. 2, liquid spray assembly 3 includes liquid dispensing tube 4, and liquid dispensing tube 4 includes annular tube 41 and inner tube 42. Wherein, the annular pipe 41 is in an annular structure; in this embodiment, the annular tube 41 may be formed by combining 6 or more short tubes connected with each other, and the short tubes are connected end to end and enclose a polygonal structure. The inner tube 42 is fixed inside the annular tube 41, and two ends thereof are respectively fixed and communicated with two short tubes oppositely arranged therein. A plurality of connecting pieces are fixed on the annular pipe 41; in this embodiment, the connecting member may be a connecting plate 7, and the connecting plate 7 may have a bent strip structure, and one end of the connecting plate may be welded to the annular tube 41. Meanwhile, 3 or more connecting plates 7 may be provided on the ring tube 41, and each connecting plate 7 is circumferentially uniformly distributed on the ring tube 41. In actual installation, one side of each connecting plate 7, which is far away from the annular tube 41, can extend to the inner side of the opening at the adjacent end of the guide cylinder 1 and is fixedly connected with the guide cylinder 1 through screws. After the installation is finished, the liquid distribution pipe 4 is integrally positioned outside the guide cylinder 1, a plane formed by the short pipes is parallel to a plane where the opening edge of the adjacent end of the guide cylinder 1 is positioned, and a reserved gap 8 is formed between the liquid distribution pipe 4 and the adjacent end of the guide cylinder 1.

One side of the inner pipe 42, which is far away from the guide cylinder 1, is also connected with a liquid inlet pipe 6, and the liquid inlet pipe 6 is communicated with the inner pipe 42 and can supply foam mixed liquid for the liquid distribution pipe 4; meanwhile, in order to facilitate the working personnel to control the liquid pressure inside the liquid distribution pipe 4 in real time, the liquid inlet pipe 6 is also provided with a pressure gauge 61. A plurality of nozzles 5 are also arranged on one side of the liquid distribution pipe 4 close to the guide cylinder 1; one nozzle 5 is fixedly arranged on one side of the inner tube 42 close to the guide cylinder 1 and is just positioned in the middle of the inner tube 42; ideally, the nozzle 5 is aligned exactly at the center of the guide cylinder 1 after the liquid ejecting assembly 3 is mounted. Meanwhile, other nozzles 5 are uniformly arranged on one side of the annular pipe 41 close to the guide cylinder 1; in the present embodiment, the nozzles 5 on the annular pipe 41 may be arranged in a one-to-one correspondence with the short pipes, and each nozzle 5 forms a structure form with uniform distribution on the circumference on the annular pipe 41.

Referring to fig. 2 and 3, in order to install each nozzle 5, a plurality of liquid outlets 43 are provided on one side of the liquid distribution tube 4 close to the guide cylinder 1, and the liquid outlets 43 are arranged corresponding to the nozzles 5 one by one. One side of the nozzle 5, which is close to the guide cylinder 1, is provided with a liquid spraying hole 51, and one side of the nozzle, which is far away from the liquid spraying hole 51, is provided with a liquid inlet 52; one side of the upper liquid inlet 52 of the nozzle 5 is embedded in the corresponding liquid outlet 43 and is detachably connected with the liquid outlet 43; in this embodiment, the liquid inlet 52 of the nozzle 5 and the corresponding liquid outlet 43 may be configured to be connected by a screw.

Referring to fig. 4, a rotary vane 9 is disposed in the nozzle 5, the rotary vane 9 is rotatably disposed in the corresponding nozzle 5, and the rotary vane 9 is located between the liquid inlet 52 and the liquid spraying hole 51. A driving structure is formed on the rotary sheet 9; when the foam mixed liquid impacts the rotary plate 9, the driving structure can be matched with the foam mixed liquid to drive the rotary plate 9 to rotate in the corresponding nozzle 5. In this embodiment, the driving structure may be two groups of guiding inclined planes 91; a partition plate 92 is fixedly arranged between the two guide inclined surfaces 91, and the partition plate 92 divides the entire rotor 9 into two parts with the same size. Meanwhile, the two guiding inclined planes 91 are both provided with liquid preparation tanks 911 in a penetrating manner, the two liquid preparation tanks 911 are both close to the edge of the rotary plate 9, and the two liquid preparation tanks 911 are uniformly distributed on the rotary plate 9 in a circumferential manner.

In actual operation, when the foam mixed liquid impacts the rotary vane 9, the foam mixed liquid acts on the two guide inclined planes 91 to drive the rotary vane 9 to rotate in the nozzle 5; in this process, the foam mixture flows out of the two liquid preparation tanks 911 and is scattered out through the liquid spraying holes 51 of the nozzle 5, which helps to increase the spreading area of the foam mixture on the foaming net 2. The foam mixed liquid is pressed in the nozzle 5 by the action of the rotary vane 9, and the amount of air dissolved in the foam mixed liquid is increased.

Referring to the attached figure 1, the foaming net 2 is enclosed into a hollow round table structure, the opening of the big end of the foaming net is fixedly sleeved at the opening of one end of the guide cylinder 1 far away from the liquid spraying component 3, and the small end of the foaming net is far away from the guide cylinder 1 and is of a closed structure. In order to ensure the foaming amount, the included angle between any two opposite generatrices on the circular table enclosed by the foaming net 2 is 20-25 degrees. An inner net body 21 is also fixed on one side of the foaming net 2 far away from the guide cylinder 1, the inner net body 21 is also enclosed into a hollow round table type structure, the large end of the inner net body is fixed with the small end of the foaming net 2, and the small end of the inner net body is positioned in the foaming net 2 and close to the guide cylinder 1. Preferably, the rotating shaft of the circular truncated cone surrounded by the foaming net 2 and the rotating shaft of the circular truncated cone surrounded by the inner net body 21 are arranged coaxially.

The working principle of the embodiment is as follows: in actual work, foam mixed liquid enters the inner pipe 42 through the liquid inlet pipe 6 and is sprayed out through the nozzles 5 on the liquid distribution pipe 4; in the process, the foam mixture is scattered from the liquid discharge holes 51 of the respective nozzles 5 by the vanes 9 inside the respective nozzles 5. Meanwhile, because a reserved gap 8 is formed between the liquid distribution pipe 4 and the adjacent end part of the guide cylinder 1, the foam mixed liquid can be fully contacted with air in the process of being sprayed out through each nozzle 5 and passing through the guide cylinder 1. Finally, the foam mixed liquid is sprayed on the inner wall of the foaming net 2; wherein part of the foam mixed liquid is discharged through the small holes of the foaming net 2 to form foam aggregates; the other part of the foam mixed solution is rebounded by the foaming net 2 and falls on the inner net body 21, and is discharged by the inner net body 21 to form a foam aggregate again; the remaining small amount of foam mixture adheres to the foaming net 2 and the inner net body 21, and is discharged after being sufficiently contacted and mixed with air. Through this kind of mode, can increase the area of contact of foam mixed liquid and foaming net 2, improve the air dissolved quantity in the foam mixed liquid, finally improve the foaming volume, guarantee the fire control effect.

Example two:

referring to fig. 5, a high power foam generator is different from the embodiment in the structure: the outer side wall of the inner net body 21 is provided with a spiral guide strip 10, the spiral guide strip 10 can be welded and fixed on the outer side wall of the inner net body 21, and a spiral winding structural form is formed on the inner net body 21. In practical work, after the foam mixed liquid falls on the inner net body 21, the foam mixed liquid discharged from each small hole on the inner net body 21 cannot flow along the outer side wall of the inner net body 21 in a mixed manner for the first time; in this process, the spiral guide strip 10 may extend the residence time of the foam mixture so that the foam mixture may be sufficiently contacted and mixed with air, contributing to an increase in the foaming amount.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment without inventive contribution as required after reading the present specification, but all of them are protected by patent laws within the scope of the claims of the present invention.

Claims

1. A high-power foam generator comprises a guide cylinder (1), a foaming net (2) and a nozzle (5), and is characterized in that the foaming net (2) and the nozzle (5) are respectively arranged at openings at two ends of the guide cylinder (1); a liquid distribution pipe (4) is fixed at one end, far away from the foaming net (2), of the guide cylinder (1), a liquid inlet pipe (6) is connected to the liquid distribution pipe (4), and a plurality of nozzles (5) are uniformly arranged on the liquid distribution pipe (4).

2. The high power foam generator according to claim 1, wherein the liquid distribution pipe (4) comprises an annular pipe (41) and an inner pipe (42) fixedly arranged at the inner side of the annular pipe (41), the inner pipe (42) is respectively communicated with the annular pipe (41) and the liquid inlet pipe (6); the nozzles (5) are uniformly arranged on the circumference of the annular pipe (41).

3. The high-power foam generator as claimed in claim 2, characterized in that a plurality of connectors are fixed on the annular tube (41), the connectors are evenly distributed on the circumference, and the annular tube (41) is fixedly connected with one end of the guide cylinder (1) adjacent to the guide cylinder through the connectors.

4. A high power foam generator according to claim 3, wherein the liquid dispensing tube (4) is located outside the guide cylinder (1), and a predetermined gap (8) is formed between the liquid dispensing tube (4) and the adjacent end of the guide cylinder (1).

5. The high power foam generator as claimed in claim 1, wherein the foaming net (2) is enclosed into a hollow round table structure, the large end of the foaming net (2) is open and fixedly sleeved at the opening of the end of the guide cylinder (1) far away from the nozzle (5), and the small end of the foaming net (2) is far away from the guide cylinder (1) and is in a closed structure.

6. The high power foam generator according to claim 5, wherein the included angle between two opposite generatrices on the circular table surrounded by the foam net (2) is 20-25 °.

7. A high power foam generator according to claim 5, wherein an inner net body (21) is fixed on the side of the foaming net (2) far away from the guide cylinder (1); the inner net body (21) is enclosed into a circular truncated cone-shaped structure, the large end of the inner net body (21) is fixed with the small end of the foaming net (2), and the small end of the inner net body (21) is located inside the foaming net (2) and close to the guide cylinder (1).

8. A high power foam generator according to claim 7, wherein the outer side wall of the inner mesh body (21) is spirally wound with spiral guide strips (10).