CN107497085B - Foam fire extinguishing system - Google Patents
Foam fire extinguishing system Download PDFInfo
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- CN107497085B CN107497085B CN201710850264.XA CN201710850264A CN107497085B CN 107497085 B CN107497085 B CN 107497085B CN 201710850264 A CN201710850264 A CN 201710850264A CN 107497085 B CN107497085 B CN 107497085B
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- mixed liquid
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- inner cylinder
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- 239000006260 foam Substances 0.000 title claims abstract description 141
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 176
- 239000007788 liquid Substances 0.000 claims abstract description 139
- 238000005507 spraying Methods 0.000 claims abstract description 12
- 238000005187 foaming Methods 0.000 claims description 10
- 239000011148 porous material Substances 0.000 claims description 9
- 238000007789 sealing Methods 0.000 claims description 9
- 239000002775 capsule Substances 0.000 claims description 8
- 230000003247 decreasing effect Effects 0.000 claims description 6
- 238000013519 translation Methods 0.000 claims description 3
- 230000001815 facial effect Effects 0.000 claims description 2
- 230000001629 suppression Effects 0.000 claims 8
- 238000001125 extrusion Methods 0.000 abstract description 4
- 238000004891 communication Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000008258 liquid foam Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
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Classifications
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C31/00—Delivery of fire-extinguishing material
- A62C31/02—Nozzles specially adapted for fire-extinguishing
- A62C31/05—Nozzles specially adapted for fire-extinguishing with two or more outlets
- A62C31/07—Nozzles specially adapted for fire-extinguishing with two or more outlets for different media
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C31/00—Delivery of fire-extinguishing material
- A62C31/02—Nozzles specially adapted for fire-extinguishing
- A62C31/12—Nozzles specially adapted for fire-extinguishing for delivering foam or atomised foam
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- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Nozzles (AREA)
- Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
Abstract
The invention discloses a foam fire extinguishing system, which comprises a foam mixed liquid conveying pipeline, a nozzle structure arranged at the water inlet end in the foam mixed liquid conveying pipeline, a liquid outlet structure arranged outside the foam mixed liquid conveying pipeline and communicated with the foam mixed liquid conveying pipeline, a foam device for delivering foam liquid by the liquid outlet structure, a water supply device communicated with the water inlet end of the foam mixed liquid conveying pipeline and a spraying device communicated with the water outlet end of the foam mixed liquid conveying pipeline, wherein the liquid outlet structure is positioned in the water spraying range of the nozzle structure, the flow area in the nozzle structure is automatically changed by the water flow delivered by the water supply device, and the flow area in the liquid outlet structure is automatically adjusted by the water flow passing through the nozzle structure. The nozzle structure automatically adjusts the flow area under the extrusion force of fire water, so that the flow area of the nozzle structure is increased or reduced, the liquid outlet flow area of the liquid outlet structure is increased or reduced, and the flow range of the foam mixed liquid is increased under the standard requirement of 3% or 6% of the mixing ratio.
Description
Technical Field
The invention relates to the field of fire fighting, in particular to a foam fire extinguishing system.
Background
The GB20031-2005 standard states that the mixing ratio of foam liquid-foam mixed liquid in the foam fire extinguishing system is 3% or 6%, and states that the working pressure of a proportional mixer and a closed foam-water spraying device in the foam fire extinguishing system is 0.6MPa-1.2MPa, the pressure drop is less than or equal to 0.2MPa, and the flow range is a value published by a manufacturer, in other words, the flow range published by the manufacturer is the flow range under the condition that the mixing ratio is 3% or 6%, the working pressure is 0.6MPa-1.2MPa, and the pressure drop is less than or equal to 0.2 MPa. The flow range needs to satisfy the mixing ratio, the working pressure and the pressure drop by 3 conditions at the same time, so the nozzle structure of the proportioning mixer, the liquid outlet structure of the foam liquid and the matching relationship between the nozzle structure and the liquid outlet structure are very important.
At present, a foam liquid outlet structure on the market is shown in fig. 1, and comprises a connecting seat 1 'and a pore plate 2' embedded in the connecting seat 1', wherein two ends of the connecting seat 1' are respectively inserted with foam liquid inlet branch pipes which are communicated with each other, and the pore plate is a pore plate with a fixed cross section. The nozzle structure of the proportioner and the liquid outlet structure of the foam liquid are both fixed sections, so that the flow range of the proportioner and the closed foam-water spraying device in the foam fire extinguishing system is greatly limited within the working pressure range under the conditions of meeting the mixing ratio and pressure drop.
Disclosure of Invention
The invention aims to provide a foam fire extinguishing system, wherein a nozzle structure of fire-fighting water automatically adjusts the flow area of the fire-fighting water according to the flow of the fire-fighting water, and the liquid outlet flow area of a liquid outlet structure of foam liquid is changed along with the flow area of the fire-fighting water, so that the flow range of the foam fire extinguishing system is expanded.
In order to achieve the above purpose, the solution of the invention is as follows:
a foam fire extinguishing system comprises a foam mixed liquid conveying pipeline, a nozzle structure arranged in the water inlet end of the foam mixed liquid conveying pipeline, a liquid outlet structure arranged outside the foam mixed liquid conveying pipeline and communicated with the foam mixed liquid conveying pipeline, a foam device for conveying foam liquid to the liquid outlet structure, a water supply device communicated with the water inlet end of the foam mixed liquid conveying pipeline and a foam mixed liquid spraying device communicated with the water outlet end of the foam mixed liquid conveying pipeline, wherein the liquid outlet structure is positioned in the water spraying range of the nozzle structure;
the liquid outlet structure comprises a connecting joint and a movable block, wherein the first end of the connecting joint is communicated with the foam mixed liquid conveying pipeline, the second end of the connecting joint is communicated with the foaming device, the movable block is movably arranged in the connecting joint in a manner of moving along the axial direction of the connecting joint, a flow passage of which the flow area is gradually decreased or gradually increased along with the axial movement of the movable block is arranged between the movable block and the connecting joint, foam liquid flows to a flow passage at the first end of the connecting joint from the second end of the connecting joint, and a first balance spring which is axially compressed along with the axial movement of the movable block is arranged in the connecting joint;
the nozzle structure is including fixed urceolus and activity inner tube, and fixed urceolus is installed in foam mixed liquid pipeline to with the sealed cooperation of foam mixed liquid pipeline, the mode movable mounting that the axial direction of activity inner tube with fixed urceolus removed in fixed urceolus, the inside of activity inner tube the inside of fixed urceolus with foam mixed liquid pipeline communicates each other, set up its first end in the lateral wall of fixed urceolus and lead to the inside wall to fixed urceolus, the second end leads to the delivery channel of its one end terminal surface department to fixed urceolus, install the balanced spring of second that takes place axial compression along with the axial translation of activity inner tube in the fixed urceolus.
The connecting joint is provided with a connecting large head section, a connecting reducing section and a conical section which is positioned between the connecting large head section and the connecting reducing section, the movable block is in an I shape with an upper transverse part, a lower transverse part and a middle vertical part, the upper transverse part and the middle vertical part of the movable block are positioned in the connecting large head section, the upper transverse part and the connecting big head section are tightly attached and in sealing fit, the lower transverse part of the movable block is positioned in the conical section, the communicating hole is formed in the upper transverse part, a gap is formed between the lower transverse part and the conical section, and the gap, the middle vertical part and the connecting big head section form the circulating channel.
A first bearing surface is arranged between the connecting big head section and the conical section, the first balance spring is sleeved outside the middle vertical part, and the first balance spring is tensioned between the first bearing surface and the bottom surface of the upper end of the movable block.
The intercommunicating pore is provided with a plurality of intercommunicating pores which are distributed at intervals along the circumferential direction of the movable block.
And the first end part and the second end part of the connecting joint are respectively provided with a foam liquid outlet branch pipe in a screwed mode.
The movable inner cylinder is provided with an inner cylinder reducing section and an inner cylinder large head section, the outer side wall of the inner cylinder large head section is in sealing fit with the inner side wall of the fixed outer cylinder, and the outer side wall of the inner cylinder large head section is in plugging or opening fit with the first end of the water outlet channel.
A step surface is formed between the inner cylinder reducing section and the inner cylinder large head section, and the second balance spring is sleeved outside the inner cylinder reducing section and tensioned between the step surface and the end surface of the fixed outer cylinder at the second end of the water outlet channel.
The inside wall of foam mixed liquid pipeline's the end of intaking is concave to be equipped with annular installation cavity, fixed urceolus install in annular installation cavity.
Still including the water supply person in charge, the play water end that the water supply was responsible for with the end of intaking of foam mixed liquid pipeline is linked together, just the water supply person in charge facial make-up is equipped with and is used for measuring first manometer in the water supply main pipe, the play water end of foam mixed liquid pipeline installs the second manometer that is used for measuring the pressure in the foam mixed liquid pipeline.
The water supply main pipe is communicated with a branch pipe, the foaming device comprises a foaming tank and a capsule arranged in the foaming tank, foam liquid is filled in the capsule, and the branch pipe is communicated with the foaming tank.
After adopting the structure, the invention has the following beneficial effects: the nozzle structure can automatically adjust the flow area of the nozzle structure under the extrusion force of fire water, so that the flow area of the fire water in the nozzle structure is increased or reduced, the liquid outlet flow area of the liquid outlet structure is increased or reduced, the purpose that the liquid outlet structure of foam liquid is synchronously increased or decreased along with the flow of the fire water of the nozzle structure and is changed in proportion is achieved, and therefore the mixing ratio is enabled to be under the standard requirement of 3% or 6%, and the flow range of foam mixed liquid is enabled to be multiplied.
Drawings
Fig. 1 is a prior art schematic diagram of a foam concentrate tapping structure.
Fig. 2 is a sectional view of the present invention (the foaming device, the water supply device and the foam injection device are omitted).
FIG. 3 is a diagram illustrating a nozzle structure according to the present invention. .
Fig. 4 is a diagram illustrating the operation of the nozzle structure according to the present invention.
Fig. 5 is a sectional view of the fixed outer cylinder of fig. 3.
Fig. 6 is a plan view of the fixed outer cylinder of fig. 3.
FIG. 7 is a servo state diagram of the liquid output structure of the present invention.
Fig. 8 is a working state diagram of the liquid outlet structure of the invention.
Fig. 9 is a sectional view of the movable block of fig. 7.
Fig. 10 is a top view of the movable block of fig. 7.
In the figure:
1 '-connecting seat 2' -orifice plate
1-liquid outlet structure 11-first foam liquid outlet branch pipe
12-second foam liquid outlet branch pipe 13-first receiving surface
14-first balance spring 15-second bearing surface
2-nozzle configuration 21-second balance spring
31-foam mixed liquid conveying pipeline 32-water supply main pipe
321-branch 33-first pressure gauge
34-second pressure gauge 4-fixed outer cylinder
41-water outlet end 411-water outlet hole
412-projection 413-mounting hole
42-side wall 421-water outlet channel
43-water inlet concave cavity 44-limiting block
45-water inlet part 5-movable inner cylinder
51-inner cylinder reducing section 52-inner cylinder large head section
531-first water outlet part 532-second water outlet part
6-spacing joint 61-receiving part
62-second reduced diameter portion 63-third reduced diameter portion
7-base joint 71-connecting big head segment
721-tapered section 7211-mating section
722-big head 723-first reduced diameter portion
8-Movable Block 81-Movable end
811-communicating hole 82-restricting end
83-connecting part
Detailed Description
In order to further explain the technical solution of the present invention, the present invention is explained in detail by the following specific examples.
A foam fire extinguishing system is shown in figures 2-10 and comprises a liquid outlet structure 1, a nozzle structure 2, a foam mixed liquid conveying pipeline 31, a foam device, a water supply device and a foam mixed liquid spraying device.
The nozzle structure 2 automatically changes the internal flow cross section of the nozzle structure through the water flow conveyed by the water supply device, and the liquid outlet structure 1 automatically adjusts the internal flow cross section of the nozzle structure 2 through the water flow flowing through the nozzle structure.
The foam device is used for delivering foam liquid to the liquid outlet structure 1, the water supply device is used for delivering fire water to the nozzle structure 2, namely, the liquid outlet structure 1 is communicated with the foam device, and the water supply device is communicated with the water inlet end of the foam mixed liquid delivery pipeline 3. Go out liquid structure 1 and install on the lateral wall of foam mixed liquid pipeline 31 to be linked together with the inside of foam mixed liquid pipeline 31, nozzle structure 2 inlays the water inlet department of locating foam mixed liquid pipeline 31, goes out liquid structure 1 and is located the flow through within range behind nozzle structure 2 of fire water, and goes out liquid structure 1 with nozzle structure 2 is close to each other.
Further, the invention also comprises a water supply main pipe 32, wherein the water outlet end of the water supply main pipe 32 is communicated with the water inlet end of the foam mixed liquid conveying pipeline 31 in a conventional mode, and the water inlet end of the water supply main pipe 32 is communicated with a water supply device. And, a branch pipe 321 communicating with the inside of the water supply main pipe 32 is provided to the water supply main pipe 32 in a conventional manner.
Preferably, the main water supply pipe 32 is provided with a first pressure gauge 33 in a conventional manner, the first pressure gauge 33 is used for measuring the pressure P1 in the main water supply pipe 32, and the foam mixed liquid delivery pipe 31 is provided with a second pressure gauge 34 in a conventional manner, the second pressure gauge 34 is used for measuring the pressure P2 in the foam mixed liquid delivery pipe 31.
In the present invention, the foam device comprises a foam tank and a capsule installed in the foam tank, the capsule is filled with foam liquid, the branch pipe 321 is communicated with the foam tank, and fire water under pressure flowing into the water main pipe flows into the foam tank through the branch pipe 321, a part of the fire water flows into the foam tank, the foam liquid in the capsule is squeezed out by the pressure difference between before and after the fire water flows into the foam tank, so that the foam liquid in the capsule flows into the liquid outlet structure 1, and the other part of the fire water flows into the nozzle structure 2. In addition, the connection of each component of the foam device and the connection of each component of the water supply device are the conventional connections in the field, and the foam mixed liquid spraying device adopts the conventional spraying device in the field, so the description is not repeated.
As shown in fig. 3-6, the nozzle structure 2 includes a fixed outer cylinder 4 and a movable inner cylinder 5, the fixed outer cylinder 4 is installed in the foam mixture delivery pipe 31, that is, an annular installation cavity 46 is concavely formed on the inner side wall of the water inlet of the foam mixture delivery pipe 31, and the fixed outer cylinder 4 is installed in the annular installation cavity 46 and is in sealing fit with the foam mixture delivery pipe. The movable inner cylinder 5 is arranged in the fixed outer cylinder 4 in an axial moving mode, the outer side wall of the movable inner cylinder 5 is in sealing fit with the inner side wall of the fixed outer cylinder 4, the chamber of the movable inner cylinder 5, the chamber of the fixed outer cylinder 4 and a foam mixed liquid conveying pipeline are communicated with each other to form a fixed flow channel with a fixed fire water flow area, meanwhile, a first end of the side wall of the fixed outer cylinder 4 is communicated with the inner side wall of the fixed outer cylinder 4, and a second end of the side wall of the fixed outer cylinder 4 is communicated with a water outlet channel at the end face of one end of the fixed outer cylinder 4, so that another flexible flow channel with a changed fire water flow area is formed; a second balance spring 21 which is compressed axially along with the axial translation of the movable inner cylinder 5 is arranged in the fixed outer cylinder 4. The fixed flow passage and the flexible flow passage form a water outlet flow area of the nozzle structure, the flow area of the fixed flow passage is smaller than that of the traditional nozzle structure, and the sum of the flow area of the fixed flow passage and the flow area of the flexible flow passage is larger than that of the traditional nozzle structure.
For convenience of description, the orientation shown in fig. 2 is taken as a reference direction. In this embodiment, the first end of the water outlet channel is the left end, and the second end thereof is the right end.
Specifically, the two ends of the movable inner cylinder 5 are respectively provided with an inner cylinder water outlet part communicated with the cavity of the movable inner cylinder 5, the fixed inner cylinder 4 is provided with a water outlet end 41, a water inlet end 45 and a side wall 42, the side wall 42 is positioned between the water outlet end 41 and the water inlet end 45, and the middle position of the water outlet end 41 is provided with a mounting hole 431 communicated with the water outlet part of the adjacent inner cylinder, so that the water outlet end 41, the cavity of the fixed outer cylinder 4, the cavity of the movable inner cylinder 5 and the mounting hole 431 are communicated to form a fixed flow channel.
The side wall 42 is provided with a water outlet hole 421 extending along the moving direction of the movable inner cylinder 5, the inner side wall of the side wall 42 is provided with a water inlet hole communicated with the left end of the water outlet hole 421, the water inlet hole is the first end of a water outlet channel, the end surface of the water outlet end 45 is provided with a water outlet hole 411 communicated with the right end of the water outlet hole 421, the water outlet hole 411 is communicated with a foam mixed liquid conveying pipeline, the water outlet hole 411 is the second end of the water outlet channel, the water outlet hole 411 corresponds to the water outlet hole 421, the water inlet hole, the water outlet hole 421 and the water outlet hole 411 form a water outlet channel, the water outlet channel is a flexible flow channel, and the water inlet hole is communicated with the cavity of the movable inner cylinder 5 through the axial movement of the movable inner cylinder 5 or blocked by the outer side wall of the movable inner cylinder 5. Wherein, the side wall 42 and the water outlet end 41 are integrally formed. Preferably, in the present invention, a plurality of water outlet channels are provided, each water outlet channel is circumferentially distributed at intervals along the circumferential direction of the fixed outer cylinder 4, and each water outlet channel is arc-shaped, that is, a plurality of water outlet through holes 421 are provided, and a plurality of water outlet holes and a plurality of water inlet holes are also provided.
The movable inner cylinder 5 is provided with an inner cylinder diameter reducing section 51 and an inner cylinder large head section 52, the water outlet part of one inner cylinder is arranged at the left end part of the inner cylinder diameter reducing section 51, the water outlet part of the other inner cylinder is arranged at the right end part of the inner cylinder large head section 52, the water outlet part of the inner cylinder at the right end is a first water outlet part 531, the water outlet part of the other inner cylinder is a second water outlet part 532, the right end of the inner cylinder diameter reducing section 51 is sleeved in the mounting hole 413, the mounting hole 431 is communicated with the first water outlet part 532, the outer side wall of the inner cylinder large head section 52 is in fit with the inner side wall of the side wall 42, a step surface is formed between the inner cylinder diameter reducing section 51 and the inner cylinder large head section 52, and the second balance spring 21 is sleeved outside the inner cylinder diameter reducing section 51 and tensioned between the step surface and the water outlet end 41. Preferably, the water inlet hole can be replaced by a water inlet cavity 43, each water inlet cavity 43 is matched with each water outlet through hole 421 and is communicated with the water inlet through hole one by one, a limit block 44 is annularly arranged on the inner side wall of the side wall 42 corresponding to the position close to each water inlet cavity 421, and the thickness of the limit block 44 is greater than or equal to that of the inner cylinder large head section 52, so that the left end surface of the inner cylinder large head section 52 is butted with the right end surface of the limit block 44 when the movable inner cylinder 5 moves leftwards, and thus each water inlet cavity 43 is blocked, and fire fighting water cannot flow into the foam mixed liquid conveying pipeline 31 from each water outlet channel. In addition, during the process that the movable inner cylinder 5 moves rightwards, the flow area of each water outlet channel 421 is gradually increased until the right side wall of the large head section 52 of the inner cylinder is contacted with the left end surface of the water outlet end 41, so that each water outlet channel 421 is completely opened. In the process, the second balance spring 21 is compressed under the action of the rightward pressure of the movable inner barrel 5 until no fire water flows into the nozzle structure, namely, the second balance spring 21 is not subjected to the rightward pressure, and at the moment, the second balance spring 21 automatically resets. Preferably, when the movable inner cylinder 5 moves rightwards, the first water outlet portion 531 can extend out of the end face of the water outlet end 41 or be flush with the outer end face of the water outlet end 41.
Preferably, a convex portion 412 is protruded from an inner side wall of the port of the outlet end 41, the mounting hole 413 is opened on the convex portion 412, and the second balance spring 21 is tensioned between the convex portion 412 and the step surface.
An annular groove is concavely arranged between the left end part of the inner side wall of the fixed outer cylinder 4 and the outer cavity wall of each water inlet cavity 43, and the limiting block 44 is arranged in the annular groove, so that the movable inner cylinder 5 moves leftwards to enable the left end surface of the inner cylinder large head section 52 to be in face-to-face contact with the right end surface of the limiting block 44, the inner side wall of the inner cylinder large head section 52 is further enabled to be flush with the inner side wall of the limiting block 44, and the outer side wall of the inner cylinder large head section 52 is flush with the outer side wall of the limiting block 44.
As shown in fig. 3-4, in the servo state, the right end surface of the limiting block 44 is in contact with the left end surface of the inner cylinder large head section 52 relatively under the restoring force of the second balance spring 21 of the movable inner cylinder 5, and at this time, the pre-pressure of the second balance spring 21 is small, so that the limiting block 44 can be in contact with the inner cylinder large head section 52. When the nozzle structure works, the movable inner cylinder 5 is extruded by fire water rightwards, the movable inner cylinder 5 is moved rightwards, each water outlet channel is communicated with the inside of the inner cylinder large head section 52, the water outlet flow area of the nozzle structure is increased, namely, one part of the fire water flowing into the nozzle structure flows out from the second water outlet part 532, the other part of the fire water flows out from the corresponding water outlet hole 411 through each water outlet channel 421, at the moment, the larger the flow rate of the fire water is, the larger the water outlet flow area in the nozzle structure is, and therefore the purpose of reducing pressure loss between the left end and the right end of the foam mixed liquid conveying pipeline corresponding to the nozzle structure and increasing the flow range can be achieved.
Compared with the prior art, the flow area of the fixed flow passage is smaller than that of the traditional nozzle structure, but the sum of the flow area of the fixed flow passage and the flow area of the variable flow passage is larger than that of the traditional nozzle structure, so that the flow area of the variable flow passage is changed, namely, the flow area of the outlet water is also changed, for example, when the outer side wall of the large head section of the inner cylinder blocks the first end of the outlet water passage, the flow area of the outlet water is smaller than that of the traditional outlet water, but when the first end of the outlet water passage is gradually opened, the flow area of the outlet water is equal to that of the traditional outlet water, and after the outlet water is continuously opened, the flow area of the outlet water is larger than that of the traditional outlet water, so that the flow area of the outlet water is flexibly changed, and the range of the outlet water of the nozzle structure of the invention is far larger than that of the traditional nozzle structure.
In addition, the size matching and the balance spring between the movable inner cylinder 5 and the fixed outer cylinder 4 in the nozzle structure are selected according to actual conditions, and the flow range of the foam mixed liquid can reach 4-100 (L/s) and above by adopting the nozzle structure under the condition that the pressure difference between the P1 and the P2 is less than or equal to 0.2 MPa.
After the nozzle structure is adopted, the flow range can be improved from conventional 4-32 (L/s) to 4-100 (L/s) or more under the condition of ensuring that the pressure difference between the front and the rear of the nozzle structure is less than or equal to 0.2MPa, so that the proportional mixer of the nozzle structure can simultaneously meet the requirements of protection areas of different flow ranges of the same project, the fire-fighting project design is greatly simplified, the investment of fire-fighting equipment is saved, and the cost is reduced.
As shown in fig. 7-10, the foam liquid outlet structure 1 comprises a connecting joint and a movable block 8.
The connecting joint is provided with a limit joint 6 and a base joint 7, the limit joint 6 and the base joint 7 are both hollow structures, the first end of the base joint 7 is embedded in the limit joint 6, the first end of the base joint is used as the lower end, the base joint 7 is communicated with the limit joint 6, the movable block 8 is arranged in the base joint 7 in an axial moving mode, the flowing area between the movable block 8 and the base joint 7 decreases progressively or increases progressively along with the axial movement of the movable block 8, and a flowing channel for foam liquid to flow from the limit joint 6 to the base joint 7 is formed, and a first balance spring 14 which is axially compressed along with the axial movement of the movable block 8 is arranged in the base joint 7.
The limit joint 6 is communicated with the foam device through a first foam liquid outlet branch pipe 11, and the base joint is communicated with the foam mixed liquid conveying pipeline 31 through a second foam liquid outlet branch pipe 12. Preferably, the lower end of the limit joint 6 and the upper end of the base joint 7 are installed together through threads, the upper end of the limit joint 6 and the first foam liquid outlet branch pipe 11 are installed together through mutually matched threads, and the lower end of the base joint 7 and the second foam liquid outlet branch pipe 12 are installed together through mutually matched threads, so that the components of the liquid outlet structure can be conveniently assembled and disassembled, and the components in the liquid outlet structure can be conveniently replaced.
Specifically, the base joint 7 has a connecting large head section 71, a connecting reduced diameter section and a tapered section 721, the tapered section 721 is located between the connecting large head section 71 and the connecting reduced diameter section, the movable block 8 includes a movable end 81 and a limiting end 82, and a connecting portion 83 connecting the movable end 81 and the limiting end 82, the movable end 81 and the connecting portion 83 are located in the connecting large head section 71, an outer side wall of the movable end 81 is in sealing fit with an inner side wall of the connecting large head section 71, the limiting end 82 is located in the tapered section 721, the movable end 81 is provided with a communication hole 811 communicating the base joint 7 with the limiting joint 6, a gap is provided between the limiting end 82 and the tapered section 721, and the gap, the gap between the connecting portion and the connecting large head section 71, and the communication hole 811 constitute the aforementioned circulation channel. In this embodiment, the tapered section 721 is tapered from bottom to top, and the axial movement of the movable block reduces or increases the distance between the tapered section 721 and the limiting end 81, so as to change the flow area of the flow channel. The first bearing surface 13 is disposed between the large connecting head section 71 and the reduced connecting section, and the first balance spring 14 is sleeved outside the connecting portion 83 and tensioned between the first bearing surface 13 and the lower end surface of the movable end 81. Preferably, the communication holes 811 are disposed in a plurality, each communication hole 811 is circumferentially distributed along the circumferential direction of the movable end 81 at intervals, and each communication hole 811 is in a strip shape. In addition, the movable block 8 is in an i-shape, and the movable block 8 has an upper horizontal portion, a lower horizontal portion and a middle vertical portion, i.e., the upper horizontal portion is the movable end, the lower horizontal portion is the limiting end, and the middle vertical portion is the connecting portion.
Furthermore, a first reducing portion 723, a large end portion 722 and the tapered section 721 are sequentially arranged in the connecting reducing section from bottom to top, a matching portion 7211 is further arranged in the connecting reducing section above the tapered section 721, the cross section of the matching portion 7211 is square, and the inner diameter of the matching portion 7211 is equal to the outer diameter of the limiting end 82.
The limiting joint 6 is internally provided with an accommodating part 61, a second diameter-reducing part 62 and a third diameter-reducing part 63 from bottom to top in sequence, the upper end of the connecting big head section 71 is arranged in the accommodating part 61 through threads, one end of the first foam liquid outlet branch pipe 11 is sleeved in the third diameter-reducing part 63, the other end of the first foam liquid outlet branch pipe is communicated with the foam device, one end of the second foam liquid outlet branch pipe is sleeved in the first diameter-reducing part 723, and the other end of the second foam liquid outlet branch pipe is communicated with the foam mixed liquid conveying pipeline 31. And, a second receiving surface 15 is formed between the accommodating portion 61 and the second diameter-reducing portion 62, when the movable block 8 moves upward, the upper end surface of the movable end 81 can be abutted against the second receiving surface 15, and at this time, the upper end surface of the limiting end 82 is located in the matching portion 7211, so that the limiting end 82 and the tapered section 721 have a minimum distance therebetween. Wherein, the side wall of the movable end 81 is provided with an annular groove for the O-shaped rubber sealing ring to be sleeved in.
As shown in fig. 7 to 8, in the servo state, under the restoring force of the first balance spring 14, the upper end surface of the movable end 81 contacts the second receiving surface 15, the upper end surface of the limiting end 82 is located in the matching portion 7211, and at this time, the pre-pressure of the first balance spring 14 is adjusted until the upper end surface of the movable end 81 contacts the second receiving surface 15. During operation, foam liquid enters the liquid outlet structure from the first foam liquid outlet branch pipe 11, the movable end 81 is subjected to downward foam liquid extrusion force, so that the movable block 8 moves downwards, the distance between the limiting end 82 and the conical section 721 is gradually increased, namely the flow area between the large head section 71 and the reducing section is gradually increased, the foam liquid flows into the large head section 71 from the flow holes 811 on the movable end 81, and then flows into the foam mixed liquid conveying pipeline 31 from the distance between the limiting end 82 and the conical section 721 through the second foam liquid outlet branch pipe 12.
In the invention, the water supply device conveys fire water into the nozzle structure, the foam device conveys foam liquid into the liquid outlet structure, at the moment, the nozzle structure can automatically adjust the flow area of the nozzle structure under the rightward extrusion force of the fire water, the flow area of the fire water in the nozzle structure is increased or decreased, and the liquid outlet flow area of the liquid outlet structure is increased or decreased, so that the aim that the liquid outlet structure of the foam liquid is synchronously increased or decreased along with the flow of the fire water of the nozzle structure and is changed in proportion is fulfilled, the flow range of the foam mixed liquid is multiplied under the standard requirement of 3% or 6% of the mixing ratio, and then the foam mixed liquid is sprayed out from the foam mixed liquid spraying device.
The above description is only a preferred embodiment of the present invention, and all equivalent changes and modifications made within the scope of the claims of the present invention should fall within the scope of the claims of the present invention.
Claims (8)
1. A foam fire suppression system characterized by: the device comprises a foam mixed liquid conveying pipeline, a nozzle structure arranged in the water inlet end of the foam mixed liquid conveying pipeline, a liquid outlet structure arranged outside the foam mixed liquid conveying pipeline and communicated with the foam mixed liquid conveying pipeline, a foam device for conveying foam liquid to the liquid outlet structure, a water supply device communicated with the water inlet end of the foam mixed liquid conveying pipeline and a foam mixed liquid spraying device communicated with the water outlet end of the foam mixed liquid conveying pipeline, wherein the liquid outlet structure is positioned in the water spraying range of the nozzle structure;
the liquid outlet structure comprises a connecting joint and a movable block, wherein the first end of the connecting joint is communicated with the foam mixed liquid conveying pipeline, the second end of the connecting joint is communicated with the foam device, the movable block is movably arranged in the connecting joint in a mode of moving along the axial direction of the connecting joint, a flow passage of which the flow area is gradually decreased or gradually increased along with the axial movement of the movable block is arranged between the movable block and the connecting joint, foam liquid flows to a flow passage at the first end of the connecting joint from the second end of the connecting joint, and a first balance spring which is axially compressed along with the axial movement of the movable block is arranged in the connecting joint; the connecting joint is provided with a limiting joint and a base joint which are communicated with each other, the first end of the base joint is embedded in the limiting joint, and the movable block is arranged in the base joint in an axial moving mode; the base joint is provided with a connecting large head section, a connecting reducing section and a conical section which is positioned between the connecting large head section and the connecting reducing section, and the conical section is gradually reduced from bottom to top; the movable block comprises a movable end, a limiting end and a connecting part for connecting the movable end and the limiting end, the movable end and the connecting part are arranged in the connecting big head section, the outer side wall of the movable end is in sealing fit with the inner side wall of the connecting big head section, the limiting end is arranged in the conical section, the movable end is provided with a communicating hole for communicating the base joint with the limiting joint, a gap is formed between the limiting end and the conical section, the distance between the connecting part and the connecting big head section and the communicating hole form the circulation channel, a first bearing surface is arranged between the connecting big head section and the connecting reducing section, and a first balance spring is sleeved outside the connecting part and tensioned between the first bearing surface and the lower end surface of the movable end;
the nozzle structure comprises a fixed outer cylinder and a movable inner cylinder, the fixed outer cylinder is arranged in a foam mixed liquid conveying pipeline and is in sealing fit with the foam mixed liquid conveying pipeline, the movable inner cylinder is movably arranged in the fixed outer cylinder in a mode that the fixed outer cylinder moves in the axial direction, the interior of the movable inner cylinder, the interior of the fixed outer cylinder and the foam mixed liquid conveying pipeline are communicated with each other, a water outlet channel with a first end communicated with the inner side wall of the fixed outer cylinder and a second end communicated with the end face of one end of the fixed outer cylinder is arranged in the side wall of the fixed outer cylinder, and a second balance spring which is axially compressed along with the axial translation of the movable inner cylinder is arranged in the fixed outer cylinder; the movable inner cylinder is provided with an inner cylinder reducing section and an inner cylinder large head section, the outer side wall of the inner cylinder large head section is in sealing fit with the inner side wall of the fixed outer cylinder, and the outer side wall of the inner cylinder large head section is in plugging or opening fit with the first end of the water outlet channel; and a step surface is formed between the inner cylinder reducing section and the large head section of the inner cylinder, and the second balance spring is sleeved outside the inner cylinder reducing section and tensioned between the step surface and the end surface of the fixed outer cylinder at the second end of the water outlet channel.
2. A foam fire suppression system according to claim 1, wherein: the movable block is the I shape that has last horizontal portion, lower horizontal portion and middle vertical portion, the last horizontal portion and middle vertical portion of movable block are in connect big head section in, and go up the horizontal portion and hug closely sealed cooperation with being connected big head section, the lower horizontal portion of movable block is in the toper section, go up and seted up the intercommunicating pore in the horizontal portion, have the clearance down between horizontal portion and the toper section, interval and intercommunicating pore between clearance, middle vertical portion and the big head section of being connected constitute the circulation passageway.
3. A foam fire suppression system according to claim 2, wherein: a first bearing surface is arranged between the connecting big head section and the conical section, the first balance spring is sleeved outside the middle vertical part, and the first balance spring is tensioned between the first bearing surface and the bottom surface of the upper end of the movable block.
4. A foam fire suppression system according to claim 2, wherein: the intercommunicating pore is provided with a plurality of intercommunicating pores which are distributed at intervals along the circumferential direction of the movable block.
5. A foam fire suppression system according to claim 1, wherein: and the first end part and the second end part of the connecting joint are respectively provided with a foam liquid outlet branch pipe in a screwed mode.
6. A foam fire suppression system according to claim 5, wherein: the inner side wall of the water inlet end of the foam mixed liquid conveying pipeline is concavely provided with an annular mounting concave cavity, and the fixed outer cylinder is arranged in the annular mounting concave cavity.
7. A foam fire suppression system according to claim 1, wherein: still include the main pipe that supplies water, the play water end that the main pipe that supplies water with the end of intaking of foam mixed liquid pipeline is linked together, just the water supply is responsible for the facial make-up and is equipped with and is used for measuring first manometer in the main pipe that supplies water, the second manometer that is used for measuring the interior pressure of foam mixed liquid pipeline is installed to the play water end of foam mixed liquid pipeline.
8. A foam fire suppression system according to claim 7, wherein: the water supply main pipe is communicated with a branch pipe, the foaming device comprises a foaming tank and a capsule arranged in the foaming tank, foam liquid is filled in the capsule, and the branch pipe is communicated with the foaming tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710850264.XA CN107497085B (en) | 2017-09-20 | 2017-09-20 | Foam fire extinguishing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710850264.XA CN107497085B (en) | 2017-09-20 | 2017-09-20 | Foam fire extinguishing system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107497085A CN107497085A (en) | 2017-12-22 |
| CN107497085B true CN107497085B (en) | 2022-11-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710850264.XA Expired - Fee Related CN107497085B (en) | 2017-09-20 | 2017-09-20 | Foam fire extinguishing system |
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| Country | Link |
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| CN (1) | CN107497085B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115887979B (en) * | 2022-12-20 | 2023-07-07 | 广州瑞港消防设备有限公司 | High-flow intelligent regulation foam fire extinguishing system |
| CN116786542B (en) * | 2023-08-29 | 2023-11-14 | 山东省十里香芝麻制品股份有限公司 | Cleaning device of oil shaking machine for producing sesame oil |
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| DE202004006977U1 (en) * | 2004-04-30 | 2004-08-26 | Vigh, Andreas, Dipl.-Ing. (Fh) | Firefighting equipment |
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| KR101118501B1 (en) * | 2011-10-27 | 2012-03-12 | 주식회사 씨플러스 | Foam proportioner |
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| CN206239930U (en) * | 2016-11-30 | 2017-06-13 | 福建天广消防有限公司 | A kind of pressure air-foam proportioner |
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| CN207286510U (en) * | 2017-09-20 | 2018-05-01 | 福建天广消防有限公司 | A kind of froth fire extinguishing system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE202004006977U1 (en) * | 2004-04-30 | 2004-08-26 | Vigh, Andreas, Dipl.-Ing. (Fh) | Firefighting equipment |
| JP2006296918A (en) * | 2005-04-25 | 2006-11-02 | Nittan Co Ltd | Fire extinguishing agent flow rate regulating device |
| KR101118501B1 (en) * | 2011-10-27 | 2012-03-12 | 주식회사 씨플러스 | Foam proportioner |
| CN202876170U (en) * | 2012-04-16 | 2013-04-17 | 江西荣和特种消防设备制造有限公司 | Line pipe type proportioning mixer |
| CN206239930U (en) * | 2016-11-30 | 2017-06-13 | 福建天广消防有限公司 | A kind of pressure air-foam proportioner |
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| Publication number | Publication date |
|---|---|
| CN107497085A (en) | 2017-12-22 |
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Granted publication date: 20221115 |