A distributed liquefied medium foam generator

Abstract

The application belongs to the technical field of fire-fighting equipment, and particularly relates to a distributed liquid medium foam generating device. The device comprises a foam spraying shell, a spoiler and a flow guide pipe. The main body of the foam spraying shell is a hollow tubular structure, one end of which is a foam outlet, and the other end is a water inlet. A foam liquid inlet and a liquid medium inlet are arranged on the region of the foam spraying shell close to the water inlet. The spoiler is arranged at the middle section of the foam spraying shell. The flow guide pipe is arranged in the foam spraying shell, one end of which is connected with the liquid medium inlet, and the other end is arranged at the middle section of the shell close to the spoiler, and is used for guiding the liquid medium to spray to the position of the spoiler. Water, foam liquid and liquid medium can be mixed together and directly sprayed in the spoiler region, and are fully stirred and mixed. The advantage of the application is that the liquid medium is fully heat-exchanged with the foam liquid in the channel and pipeline in the spoiler, and relatively low-temperature foam is formed, so that the cooling effect of the foam fire extinguishing is enhanced.

Description

Technical Field

[0001] This invention belongs to the field of fire-fighting equipment technology, specifically relating to a distributed liquefied medium foam generating device. Background Technology

[0002] Foam fire extinguishing technology plays an irreplaceable role in fire extinguishing and control due to the oxygen-blocking, radiant heat-blocking, and heat-absorbing cooling effects of foam. Among them, positive pressure foam fire extinguishing technology has advantages over negative pressure foam fire extinguishing devices, such as uniform and fine foam, long range, and high fire extinguishing efficiency, and is being gradually promoted and applied.

[0003] Currently, positive pressure foam fire extinguishing technology mainly includes compressed gas cylinder supply, air compressor supply, and liquefied medium supply. Among them, liquefied medium supply, as an emerging technology, has good prospects due to its small space occupation of liquid storage and gas supply equipment.

[0004] However, when liquefied media are used as the supply source for positive pressure foam generators, their low-temperature physical properties (e.g., liquid nitrogen at -196 degrees Celsius, liquid carbon dioxide at -37 degrees Celsius) cause localized freezing of the foam mixture during high-flow-rate injection. This leads to incomplete gas-liquid mixing and affects foam quality. The localized ultra-low temperatures at high flow rates limit the application potential of liquefied media foam generators. Summary of the Invention

[0005] The purpose of this invention is to provide a distributed liquefied medium foam generator that allows for thorough mixing and heat exchange between the fire extinguishing foam liquid and the liquefied medium, is safe and reliable to operate, and has a better fire extinguishing effect.

[0006] The distributed liquefied medium foam generating device provided by the present invention includes a foam injection shell, a flow disruptor, and a flow guide pipe;

[0007] The main body of the foam spraying shell is a hollow tube, with a foam outlet at one end and a water inlet at the other end; the foam spraying shell is provided with a foam liquid inlet and a liquefied medium inlet in the area near the water inlet.

[0008] The baffle is located in the middle section of the foam spraying shell;

[0009] The guide pipe is installed in the foam spraying shell, with one end connected to the liquefied medium inlet and the other end located in the middle section of the shell near the baffle, for guiding the liquefied medium to be sprayed toward the baffle.

[0010] Water enters through the inlet and mixes with the foam liquid entering through the foam liquid inlet, then enters the middle section of the foam spraying shell and passes through the baffle area; the liquefied medium enters through the liquefied medium inlet and is guided to the middle section of the foam spraying shell through the guide pipe, and is directly sprayed onto the baffle area; water, foam and liquefied medium are fully stirred and mixed in the baffle area by the baffle.

[0011] In this invention, the guide pipe is divided into two sections, one of which is connected to the inlet of the liquefied medium, and the other is a straight pipe section;

[0012] The spoiler is a hollow blade that is sealed to the straight section of the guide pipe, meaning that the internal hollow area of ​​the spoiler is connected to the inner pipe area of ​​the guide pipe.

[0013] The straight section of the guide pipe and the blades of the turbulent are provided with several injection holes as liquid outlets.

[0014] In this way, the liquefied medium enters from the liquefied medium inlet, enters the hollow area inside the baffle through the guide pipe, and can then be distributed and injected into the foam spray shell through the guide pipe and the spray holes of the baffle.

[0015] Furthermore, the injection through-hole of the guide pipe is located in the area near the spoiler on the straight pipe section.

[0016] Furthermore, the straight section of the guide pipe coincides with the central axis of the foam spraying shell; it also serves to fix the flow deflector.

[0017] Furthermore, the foam spraying shell is divided into inner and outer shells, and the space between the inner and outer shells serves as a heat insulation layer. The heat insulation layer is filled with heat insulation material or vacuumed. The outer contour of the spoiler matches the inner wall of the inner shell and can be placed in the inner shell.

[0018] or:

[0019] In this invention, the foam spraying shell is divided into inner and outer shells, and the space between the inner and outer shells serves as a heat insulation layer. The heat insulation layer is filled with heat-insulating material or vacuumed, which can block the temperature conduction between the inner and outer shells. The outer contour of the turbulence diffuser matches the inner sidewall of the inner shell, so that it can be placed in the inner shell and fixed.

[0020] The main body of the guide tube is located between the inner shell and the outer shell of the foam spraying shell. The guide tube is a spring-shaped spiral tube that can be tightly wound and attached to the outer wall of the inner shell. That is, the liquefied medium inlet only needs to be set on the outer shell, and does not need to be set on the inner shell.

[0021] The spiral tube is provided with several injection through holes, and the inner shell is also provided with injection through holes at the corresponding positions. The injection through holes of the spiral tube and the injection through holes of the inner shell are fixedly connected to each other as liquid outlets, and the liquid outlets are facing the spring-shaped central area of ​​the spiral tube, that is, facing the turbulence breaker.

[0022] In this way, by adopting a distributed design that is close to the side wall, the liquefied medium enters into the spiral tube from the liquefied medium inlet. The spiral tube is located inside the heat insulation layer to prevent the liquefied medium from rapidly vaporizing and causing overpressure bursting in the long spiral tube. At the same time, it effectively isolates the outer surface of the foam spray shell to avoid freezing damage. The foam is sprayed into the inner shell from the spiral tube through the spray through hole between the spiral tube and the inner shell, where it mixes with water and foam liquid and vaporizes to produce foam.

[0023] Furthermore, the flow disruptor is a hollow spiral blade with several injection holes on the blade as liquid outlets; the main body of the guide pipe is a spiral pipe, and a branch pipe is provided from the port position connected to the liquefied medium inlet, which extends to the hollow flow disruptor and connects with it; the area of ​​the branch pipe near the flow disruptor is also provided with several injection holes as liquid outlets.

[0024] or:

[0025] In this invention, the spoiler is a hollow blade;

[0026] The guide tube includes an L-shaped single tube and a spiral single tube:

[0027] One end of the L-shaped single tube is connected to the liquefied medium inlet, and the other end is connected to the flow disruptor, so that the internal hollow area of ​​the flow disruptor and the inner tube area of ​​the guide tube are connected; the L-shaped single tube is provided with injection through holes near the flow disruptor area, and the flow disruptor is also provided with several injection through holes that penetrate the hollow area.

[0028] The spiral single tube has one end connected to the end of the L-shaped single tube near the liquefied medium inlet, and the other end is closed. The spiral single tube is spirally wrapped around the outside of the baffle. The spiral single tube is provided with several injection through holes, and the holes face the baffle.

[0029] The foam spraying shell is divided into inner and outer shells, with the space between the inner and outer shells serving as a heat insulation layer; the outer contour of the spoiler matches the inner sidewall of the inner shell, allowing it to fit snugly inside the inner shell and be fixed in place.

[0030] The L-shaped single tube is installed inside the inner shell, with one end connected to the liquefied medium inlet passing through the inner and outer shells and connecting to the liquefied medium generating device.

[0031] The spiral single tube is disposed in the insulation layer between the inner and outer shells; the outer wall of the inner shell is fitted with the inner ring of the spiral single tube, and the inner shell is provided with an opening corresponding to the injection through hole of the spiral single tube, and the opening and the injection through hole are sealed together; the inner wall of the inner shell is fitted with the outer contour of the spoiler, and the spoiler and the inner shell are fixedly positioned relative to each other.

[0032] In this way, the liquefied medium enters the interior of the spoiler through the guide pipe. Part of the liquefied medium is injected into the inner shell through the injection holes of the L-shaped single pipe and the injection holes of the spoiler. At the same time, another part of the liquefied medium is injected into the spoiler through the injection holes of the spiral single pipe. The liquefied medium, water and foam impact the spoiler together and are fully mixed, and then sprayed out through the foam outlet of the foam injection shell.

[0033] in addition:

[0034] In this invention, a foam mixing valve is also provided, which is located at the foam liquid inlet; the foam mixing valve includes a tubular body, a tension spring, and a sealing turbulence plug;

[0035] The tubular body is a hollow tube with several supporting rods fixedly connected to the inner wall of the tube inside. The supporting rods converge and connect at the central axis of the tubular body.

[0036] The sealing turbulence plug is fitted and sealed at the opening at the bottom of the tubular body; the sealing turbulence plug includes an upper plate, a middle blade, a bottom sealing plate and a shaft.

[0037] The upper plate and the lower sealing plate are arranged in parallel and connected by a shaft; the area of ​​the upper plate is smaller than that of the lower sealing plate.

[0038] The middle layer blades are turbine blade-shaped and are disposed between the upper layer plate and the lower layer sealing plate, and rotate about the shaft as the axis of rotation;

[0039] The tension spring corresponds to a support link, and there are several of them. One end of the tension spring is connected to the lower end face of the support link, and the other end is fixedly connected to the upper end face of the upper plate.

[0040] The tension spring is positioned to ensure that the bottom sealing plate can seal and cover the lower port of the tubular body. That is, the tension spring is in the initial state or in a pre-tensioned state with pre-tightening force, so that the sealing turbulence plug is pulled upward to achieve the sealing function.

[0041] Furthermore, the supporting connecting rod convergence area is provided with a central through hole; a positioning center rod is provided vertically upward at the center of the upper plate, and the positioning center rod passes through the central through hole;

[0042] When the sealing turbulence plug moves up and down, the positioning center rod is restricted in position by the center through hole of the support connecting rod, ensuring that the bottom sealing plate moves up and down in a horizontal state without shaking.

[0043] Furthermore, the tubular body is further provided with a positioning layer. The structure of the positioning layer is equivalent to the structure of the converging support rods, except that the support rods of the positioning layer and the support rods of the connecting spring are misaligned to avoid the position of the spring. The positioning center rod also passes through the central through hole of the positioning layer. The positioning center rod is further fixed by positioning through the two central through holes, so that the sealing turbulence plug can move up and down more stably without swaying; or:

[0044] The positioning center rod passes through the central through hole; the central through hole has a thickness, and the thickness design ensures that the positioning center rod will not shake or swing within the central through hole.

[0045] Furthermore, a foolproof design is provided between the positioning center rod and the center through hole, specifically:

[0046] The positioning center rod has a protrusion along its length, and the side wall of the central through hole has a groove matching the shape of the protrusion at the corresponding position. This prevents the positioning center rod from rotating within the central through hole, allowing it to move only up and down; or:

[0047] The positioning center rod has a cross-section and a central through hole that are mutually matched non-circular shapes, such as elliptical or square. This means that the positioning center rod cannot rotate in the central through hole, but can only move up and down.

[0048] This restricts the rotational movement of the sealing bleed plug, preventing the tension spring from getting tangled.

[0049] In this way, when the external foam liquid supply device delivers the foam liquid to the foam liquid inlet, the sealing turbulence plug opens under the action of the delivery force, and the foam liquid enters the foam spraying housing through the foam mixing valve. At the same time, due to the action of the foam liquid spraying force, the middle layer blades will be driven to rotate, which is equivalent to pre-enhancing the mixing of water and foam liquid.

[0050] In this invention, the spoiler is a conical spoiler, a threaded spoiler, or an SK spoiler, etc.; preferably, an SK spoiler with helical blades is used.

[0051] In this invention, the liquefaction medium can be liquid nitrogen at -196°C or liquid carbon dioxide at -37°C.

[0052] This invention employs distributed injection of the liquefied medium, transforming centralized heat exchange into distributed heat exchange. This allows the vaporization process of the liquefied medium to be distributed over a longer range within the pipe and / or hollow baffle blade area, improving the uniformity of vaporization mixing. It also avoids the rapid vaporization of large amounts of liquefied medium over short distances, which could lead to excessive heat absorption from the foam mixture and cause ice blockage, significantly reducing the risk of localized ultra-low temperature freezing. This improves the mixing uniformity and heat exchange efficiency of the device, and increases the maximum injection volume of the liquefied medium. Furthermore, the distributed injection orifices can promptly release the pressure generated by the vaporization of the liquefied medium within the guide pipe, preventing overpressure pipe bursts and enhancing the safety of the equipment. The inner and outer double-layer design of the foam injection shell effectively isolates the low temperature from the outer surface of the foam injection shell, preventing frost damage. Attached Figure Description

[0053] Figure 1 This is a three-dimensional structural diagram of Example 1.

[0054] Figure 2 This is a side sectional view of Example 1.

[0055] Figure 3 This is a three-dimensional structural diagram of Example 2.

[0056] Figure 4 This is a side sectional view of Example 2.

[0057] Figure 5 The diagram shows the structure of the foam mixing valve assembled in Example 3.

[0058] Figure 6 This is a schematic diagram of the foam mixing valve structure in Example 3.

[0059] Figure 7 The diagram shows the working state of the foam mixing valve in Example 3; (a) is the closed state, and (b) is the open state.

[0060] Figure 8 This is a structural diagram of the guide tube and the spoiler in Example 4.

[0061] Figure 9 This is a schematic diagram of the foam mixing valve structure in Example 5.

[0062] Figure 10 The diagram shows the working state of the foam mixing valve in Example 5; (a) is the closed state, and (b) is the open state.

[0063] Figure 11 This is a three-dimensional structural diagram of the foam mixing valve in Example 5.

[0064] The following labels are used in the diagram: 1 is the foam spraying shell, 2 is the flow disruptor, 3 is the guide pipe, 4 is the inner shell, 5 is the outer shell, 6 is the foam liquid inlet, 7 is the liquefied medium inlet, 8 is the spraying through hole, 9 is the foam mixing valve, 10 is the tubular body, 11 is the tension spring, 12 is the sealing flow disruptor plug, 13 is the support rod, 14 is the upper plate, 15 is the middle blade, 16 is the bottom sealing plate, 17 is the shaft, 18 is the positioning center rod, 19 is the foam outlet, 20 is the water inlet, 21 is the short pipe, and 22 is the positioning sleeve. Implementation Example

[0065] The present invention includes a foam spraying shell 1, a flow deflector 2, and a flow guide 3; all of which are made of metal casting.

[0066] The main body of the foam spraying shell 1 is a cylindrical hollow tube, divided into three sections: front, middle, and rear. One end of the front section is a foam outlet 19, and one end of the rear section is a water inlet 20. The diameter of the middle section hollow tube is larger than that of the front and rear sections. The foam spraying shell consists of an inner shell 4 and an outer shell 5. The space between the inner and outer shells serves as a thermal insulation layer. This insulation layer can be a vacuum or filled with insulating material, such as phenolic foam or polyurethane. Figure 1 As shown.

[0067] The spoiler 2 is a helical blade-shaped SK spoiler, located in the middle section of the inner shell 4 of the foam spraying housing 1; the outer contour of the spoiler 2 matches the inner wall of the inner shell 4, allowing it to fit snugly within the inner shell 4, such as... Figure 1 As shown; the flow disruptor 2 adopts a hollow spiral blade structure with a hollow cavity inside for the flow of liquefied medium; at the same time, the blades of the flow disruptor 2 are provided with several uniformly arranged injection holes 8 as liquid outlets; the flow disruptor 2 has a docking opening at the center of the blade edge facing the water inlet.

[0068] The rear section of the foam spraying housing 1 is provided with a foam liquid inlet 6 and a liquefied medium inlet 7; wherein:

[0069] A short pipe 21 is integrally welded to the foam liquid inlet 6 of the inner shell 4. The short pipe 21 can pass through the foam liquid inlet 6 of the outer shell 5 and extend out to connect to the foam generator.

[0070] The guide pipe 3 is L-shaped and located within the inner shell 4 of the foam spraying housing. Its vertical section passes through the liquefied medium inlet 7 of both the inner and outer shells, connecting to the liquefied medium supply device. The horizontal section extends to the middle of the foam spraying housing 1, connecting with the opening of the baffle 2 (either by thread or welding), thus connecting the hollow area inside the baffle 2 with the inner tube area of ​​the guide pipe 3. The guide pipe 3, located near the baffle 2 and in the middle of the foam spraying housing 1, also has several spray holes 8. The horizontal section of the guide pipe 3 coincides with the central axis of the foam spraying housing 1, also serving to fix the baffle 2. In this way, the liquefied medium enters through the liquefied medium inlet 7, passes through the guide pipe 3 into the hollow area inside the baffle 2, and can then be injected in a distributed manner through the guide pipe 3 and the spray holes 8 of the baffle 2.

[0071] The inner shell 4 and outer shell 5 can be constructed as separate parts, such as... Figure 1 As shown, the flow disruptor 2 and the flow guide pipe 3 are first installed in the inner shell 4 and fixed by welding or other means. The flow guide pipe 3 and the liquefied medium inlet 7 of the inner shell 4 are first welded and sealed, and then the inner shell 4 is assembled and welded to seal. Then, heat insulation material is laid on the outer wall of the inner shell 4. Several reinforcing ribs or positioning columns can be set on the inner wall of the outer shell 5 to ensure that there is a stable space between the outer shell 5 and the inner shell 4 as a heat insulation layer. The outer shell 5 is assembled and wrapped around the heat insulation material and then welded to seal.

[0072] In use, water enters through the inlet and mixes with the foam liquid entering through the foam liquid inlet, both entering the middle section of the foam spray housing and passing through the baffle area. The liquefied medium enters through the liquefied medium inlet, flows through the guide pipe into the baffle inner cavity, and is then directly sprayed into the baffle area through the spray holes, where it mixes thoroughly with the water and foam liquid. At this time, because the water, foam liquid, and liquefied medium are all forcefully supplied through their respective external devices, they have a certain spray impact force, causing the three liquids to continuously collide with the baffle blades, resulting in thorough passive mixing. Finally, the mixed and foamed extinguishing foam is sprayed out from the foam outlet of the foam spray housing to extinguish the fire. Example

[0073] The present invention includes a foam spraying shell 1, a flow deflector 2, and a flow guide 3; all of which are made of metal casting.

[0074] The main body of the foam spraying shell 1 is a cylindrical hollow tube, divided into three sections: front, middle, and rear. One end of the front section is the foam outlet, and one end of the rear section is the water inlet 20. The diameter of the middle hollow tube is larger than that of the front and rear hollow tubes. The foam spraying shell consists of an inner shell 4 and an outer shell 5. The space between the inner and outer shells serves as a thermal insulation layer, which can be a vacuum or filled with insulating material to prevent temperature conduction between the inner and outer shells. Figure 3 As shown.

[0075] The spoiler 2 is a threaded spoiler, located in the middle section of the inner shell 4 of the foam spraying housing 1; the outer contour of the spoiler 2 matches the inner wall of the inner shell 4, allowing it to fit snugly within the inner shell 4, such as... Figure 3 As shown;

[0076] The front section of the foam spraying housing 1 is provided with a foam liquid inlet 6 and a liquefied medium inlet 7; wherein:

[0077] A short pipe 21 is integrally welded to the foam liquid inlet 6 of the inner shell 4. The short pipe 21 can pass through the foam liquid inlet 6 of the outer shell 5 and extend out to connect to the foam generator.

[0078] The main body of the guide tube 3 is disposed between the inner shell 4 and the outer shell 5 of the foam spraying shell 1. The guide tube 3 is a spring-shaped spiral tube that can be tightly wound and attached to the outer wall of the inner shell 4, such as... Figure 3 As shown;

[0079] The spiral tube 3 is provided with a number of equally spaced injection holes 8 facing the inner shell 4. The inner shell 4 is also provided with injection holes 8 at corresponding positions. The injection holes 8 of the spiral tube and the injection holes 8 of the inner shell 4 can be fixedly connected by welding to serve as liquid outlets. The injection holes 8 can also be further sealed by applying glue. The liquid outlet faces the spring-shaped central area of ​​the spiral tube, that is, the flow deflector 2.

[0080] In this way, a distributed design closely attached to the sidewall is adopted. The liquefied medium enters into the spiral tube from the liquefied medium inlet. The spiral tube is located inside the heat insulation layer to prevent the liquefied medium from rapidly vaporizing and causing overpressure bursts in the long spiral tube. At the same time, it effectively isolates the outer surface of the foam spray shell to avoid freezing damage and prevents the liquefied medium from rapidly vaporizing and causing overpressure bursts in the long spiral tube. Through the injection through-hole between the spiral tube and the inner shell, the liquefied medium is injected into the inner shell from the spiral tube, where it mixes with water and foam liquid and vaporizes to produce foam.

[0081] In use, water enters through the inlet and mixes with the foam liquid entering through the foam liquid inlet, both entering the middle section of the foam spray housing and passing through the baffle area. The liquefied medium enters through the liquefied medium inlet, flows through the guide pipe into the baffle inner cavity, and is then directly sprayed into the baffle area through the spray holes, where it mixes thoroughly with the water and foam liquid. At this time, because the water, foam liquid, and liquefied medium are all forcefully supplied through their respective external devices, they have a certain spray impact force, causing the three liquids to continuously collide with the baffle blades, resulting in thorough passive mixing. Finally, the mixed and foamed extinguishing foam is sprayed out from the foam outlet of the foam spray housing to extinguish the fire. Example

[0082] Based on Embodiments 1 and 2, a foam mixing valve 9 is also provided.

[0083] The foam mixing valve 9 is a one-way valve, located at the lower port of the short pipe 21 inside the foam liquid inlet 6, for reference. Figure 5 As shown; the foam mixing valve 9 includes a tubular body 10, a tension spring 11, and a sealing turbulence plug 12; as Figure 6 , Figure 7 As shown, the specific structure is as follows:

[0084] The tubular body 10 is a hollow metal tube that can be sealed and nested into the short tube 21. The outer wall and the inner wall of the short tube 21 are snapped or welded together. The tubular body 10 is provided with three support rods 13 that are fixedly connected to the inner wall of the tube. The support rods 13 converge and connect at the center of the tubular body 10.

[0085] The sealing turbulence plug 12 is fitted and sealed at the opening at the bottom end of the tubular body 10; the sealing turbulence plug 12 includes an upper plate 14, a middle blade 15, a bottom sealing plate 16 and a shaft 17.

[0086] The upper plate 14 and the lower sealing plate 15 are metal discs or plastic injection molded discs, arranged in parallel, and connected by welding the center of the discs together through a shaft or integrally molded plastic; the diameter of the upper plate 14 is smaller than the diameter of the lower sealing plate 16.

[0087] The middle layer blade 15 is turbine blade shaped, with a shaft hole in the center for the shaft 17 to pass through. It is located between the upper layer plate 14 and the lower layer sealing plate 16, and rotates about the shaft 17 as the pivot.

[0088] The tension spring 11 corresponds to the support link 13, and there are three of them. One end of the tension spring 11 is welded to the lower end face of the support link 13 or connected through a hook structure, and the other end is welded to the upper end face of the upper plate 14 or connected through a hook structure.

[0089] In the initial state, the tension spring 11 has a certain amount of tension and preload, which tightens and seals the bottom sealing plate 16 in the initial state. The bottom sealing plate 16 has a rubber sealing ring on its edge, which seals and covers the lower port of the tubular body 10.

[0090] The supporting connecting rod 13 has a central through hole in its converging area; the upper plate has a positioning center rod 18 vertically upward at its center position, which passes through the central through hole. The positioning center rod 18 and the central through hole have a foolproof design, with a protrusion along the length of the positioning center rod. The side wall of the central through hole has a groove that matches the shape of the protrusion at the corresponding position of the protrusion. In this way, the positioning center rod cannot rotate in the central through hole, but can only move up and down, thereby restricting the rotational movement of the sealing turbulence plug and preventing the tension spring from winding.

[0091] In addition, the tubular body 10 is provided with a positioning layer. The structure of the positioning layer is the same as that of the converging support rods 13, except that the support rods of the positioning layer and the support rods 13 connecting the tension spring 11 are offset and rotated horizontally by 60° to avoid the position of the tension spring 11. The positioning center rod 18 also passes through the central through hole of the positioning layer. The positioning center rod 18 is further fixed by positioning through the two central through holes. Figure 6 As shown, when the sealing turbulence plug 12 moves up and down, the positioning center rod is restricted in position by the center through hole of the support connecting rod 18, ensuring that the bottom sealing plate 16 moves up and down stably in a horizontal state without shaking. Example

[0092] The spoiler described in this invention is a hollow blade;

[0093] The guide tube includes an L-shaped single tube and a spiral single tube:

[0094] One end of the L-shaped single tube is connected to the liquefied medium inlet, and the other end is connected to the flow disruptor, so that the internal hollow area of ​​the flow disruptor and the inner tube area of ​​the guide tube are connected; the L-shaped single tube is provided with injection through holes near the flow disruptor area, and the flow disruptor is also provided with several injection through holes that penetrate the hollow area.

[0095] The spiral single tube has one end connected to the end of the L-shaped single tube near the liquefied medium inlet, and the other end is closed. The spiral single tube is spirally wound around the outside of the flow disruptor. The spiral single tube has several injection through-holes, with the orifices facing the flow disruptor. Figure 8 As shown.

[0096] The foam spraying shell is divided into inner and outer shells, with the space between the inner and outer shells serving as a heat insulation layer; the outer contour of the spoiler matches the inner sidewall of the inner shell, allowing it to fit snugly inside the inner shell and be fixed in place.

[0097] The L-shaped single tube is installed inside the inner shell, with one end connected to the liquefied medium inlet passing through the inner and outer shells and connecting to the liquefied medium generating device.

[0098] The spiral single tube is disposed in the insulation layer between the inner and outer shells; the outer wall of the inner shell is fitted with the inner ring of the spiral single tube, and the inner shell is provided with an opening corresponding to the injection through hole of the spiral single tube, and the opening and the injection through hole are sealed together; the inner wall of the inner shell is fitted with the outer contour of the spoiler, and the spoiler and the inner shell are fixedly positioned relative to each other.

[0099] In this way, the liquefied medium enters the interior of the spoiler through the guide pipe. Part of the liquefied medium is injected into the inner shell through the injection holes of the L-shaped single pipe and the injection holes of the spoiler. At the same time, another part of the liquefied medium is injected into the spoiler through the injection holes of the spiral single pipe. The liquefied medium, water and foam liquid impact the spoiler together to fully mix and foam, and then are ejected through the foam outlet of the foam injection shell.

[0100] Other materials, processes, and assembly methods can be referred to in Examples 1 and 2, which can be achieved using conventional splicing and welding techniques, and will not be described in detail. Example

[0101] In this invention, the foam mixing valve 9 is a one-way valve, located at the lower port of the short pipe 21 inside the foam liquid inlet 6; the foam mixing valve 9 includes a tubular body 10, a tension spring 11, and a sealing turbulence plug 12; as shown Figure 9 As shown, the specific structure is as follows:

[0102] The tubular body 10 is a hollow metal tube that can be sealed and nested into the short tube 21. The outer wall and the inner wall of the short tube 21 are snapped or welded together. The tubular body 10 is provided with three support rods 13 that are fixedly connected to the inner wall of the tube. The support rods 13 converge and connect at the center of the tubular body 10.

[0103] The sealing turbulence plug 12 is fitted and sealed at the opening at the bottom end of the tubular body 10; the sealing turbulence plug 12 includes an upper plate 14, a middle blade 15, a bottom sealing plate 16 and a shaft 17.

[0104] The upper plate 14 and the lower sealing plate 15 are metal discs or plastic injection molded discs, arranged in parallel, and connected by welding the center of the discs together through a shaft or integrally molded plastic; the diameter of the upper plate 14 is smaller than the diameter of the lower sealing plate 16.

[0105] The middle layer blade 15 is turbine blade shaped, with a shaft hole in the center for the shaft 17 to pass through. It is located between the upper layer plate 14 and the lower layer sealing plate 16, and rotates about the shaft 17 as the pivot.

[0106] The tension spring 11 corresponds to the support link 13, and there are three of them. One end of the tension spring 11 is welded to the lower end face of the support link 13 or connected through a hook structure, and the other end is welded to the upper end face of the upper plate 14 or connected through a hook structure.

[0107] In the initial state, the tension spring 11 has a certain amount of tension and preload, which tightens and seals the bottom sealing plate 16 in the initial state. The bottom sealing plate 16 has a rubber sealing ring on its edge, which seals and covers the lower port of the tubular body 10.

[0108] The supporting connecting rod 13 has a central through hole in its converging area. The thickness of the central through hole area is 4 to 8 times the thickness of the supporting connecting rod, which is equivalent to setting a positioning sleeve 22 at the central through hole position. A positioning center rod 18 is vertically upward at the center of the upper plate. The outer diameter of the positioning center rod 18 matches the inner diameter of the positioning sleeve 22 (i.e., the inner diameter of the central through hole), allowing it to pass tightly through the positioning sleeve 22. Because of the constraint of the positioning sleeve 22, the positioning center rod 18 will not wobble in the central through hole. Figure 10 , Figure 11 As shown;

[0109] When the sealing turbulence plug 12 moves up and down, the positioning center rod is restricted in position by the center through hole of the support connecting rod 18, ensuring that the bottom sealing plate 16 moves up and down stably in a horizontal state without shaking.

[0110] A foolproof design is provided between the positioning center rod 18 and the center through hole, that is, the cross-section of the positioning center rod 18 is square (or it can be set to elliptical), such as... Figure 3 As shown, the positioning center rod cannot rotate in the center through hole, but can only move up and down, thereby restricting the rotational movement of the sealing turbulence plug and preventing the tension spring from getting tangled.

[0111] The remaining structures are as described in Example 3 and will not be explained in detail.

[0112] When using:

[0113] 1. Using the operating methods of Examples 1 and 2, water, foam liquid, and liquefied medium are injected from their respective inlets; wherein, when the external foam liquid supply device delivers the foam liquid to the foam liquid inlet, the sealing turbulence plug opens under the action of the delivery force, and the foam liquid enters the foam injection housing through the foam mixing valve. At the same time, due to the action of the foam liquid injection force, the middle layer blades will be driven to rotate, which is equivalent to pre-enhancing the mixing of water and foam liquid;

[0114] Second, a pre-mixed solution of water and foam liquid is used, which enters directly through the inlet and enters the middle section of the foam spraying shell together. It is mixed and foamed with the liquefied medium in the turbulence area. At this time, no foam liquid passes through the foam liquid inlet, which is closed by the foam mixing valve, so there is no flow loss of the pre-mixed solution in the foam spraying shell. This forms a new mixing method.

[0115] This allows for the mixing of multiple liquids into a fire extinguishing foam mixture by adding a foam mixing valve.

[0116] The overall advantages of this invention are:

[0117] With multiple injection holes, the discharged liquefied medium is distributed, enhancing mixing while also acting as an air vent to relieve pressure and prevent overpressure pipe bursts. The liquefied medium passes through the internal channel of the baffle, reducing the surface temperature of the baffle and fully exchanging heat with the foam mixture in the pipeline to form relatively low-temperature foam, enhancing the cooling effect of foam fire extinguishing. In addition, it is compatible with foam mixture or water and foam liquid entering separately. A foam mixing valve is installed. When the foam liquid impacts, the valve body enters the shell, and the middle blades enhance the mixing of foam liquid and water. Otherwise, it automatically rebounds to reduce losses.

[0118] Although the above methods are illustrated and described as a series of structures for the sake of simplicity, it should be understood and appreciated that these methods are not specifically limited, as some structures may occur in different orders and / or concurrently with other actions from those illustrated and described herein or not illustrated and described herein but which may be understood by those skilled in the art, according to one or more embodiments.

[0119] The prior description of this disclosure is provided to enable any person skilled in the art to make or use this disclosure. Various modifications to this disclosure will be apparent to those skilled in the art, and the general principles defined herein may be applied to other variations without departing from the spirit or scope of this disclosure. Therefore, this disclosure is not intended to be limited to the examples and designs described herein, but should be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A distributed liquefied medium foam generating apparatus, characterized by, The foam injection shell, the spoiler and the flow guide pipe are included; The main body of the foam injection shell is a hollow tubular, one end is a foam outlet, and the other end is a water inlet; the foam injection shell is provided with a foam liquid inlet and a liquefied medium inlet on the area close to the water inlet; The spoiler is arranged at the middle section of the foam injection shell; The flow guide pipe is arranged in the foam injection shell, one end of which is connected with the liquefied medium inlet, and the other end is arranged at the middle section of the shell close to the spoiler, for guiding the liquefied medium to be injected to the position of the spoiler; The flow guide pipe is divided into two sections, one end of one section is connected with the liquefied medium inlet, and the other section is a straight pipe section; The spoiler is a hollow blade, and is sealingly connected with the straight pipe section of the flow guide pipe, that is, the hollow area inside the spoiler and the inner pipe area of the flow guide pipe are communicated; The straight pipe section of the flow guide pipe and the blade of the spoiler are provided with a plurality of injection through holes as liquid outlets.

2. The distributed liquefied medium foam generator of claim 1, wherein, The straight pipe section of the flow guide pipe and the middle axis of the foam injection shell coincide; at the same time, the spoiler is also fixed.

3. The distributed liquefied medium foam generator of claim 1, wherein, The foam injection shell is divided into an inner layer shell and an outer layer shell, and the space between the inner layer shell and the outer layer shell is used as a temperature insulation layer, which is filled with thermal insulation materials or is vacuumized; the outer contour of the spoiler matches the inner wall of the inner layer shell, and the spoiler can be placed in the inner layer shell.

4. The distributed liquefied medium foam generator of claim 1, wherein, The foam injection shell is divided into an inner layer shell and an outer layer shell, and the space between the inner layer shell and the outer layer shell is used as a temperature insulation layer, which is filled with thermal insulation materials or is vacuumized; the outer contour of the spoiler matches the inner wall of the inner layer shell, and the spoiler can be placed in the inner layer shell. The main body of the flow guide pipe is arranged between the inner layer shell and the outer layer shell of the foam injection shell, and the flow guide pipe is a spring-shaped spiral pipe which can be tightly wound and attached to the outer wall of the inner layer shell, that is, the liquefied medium inlet only needs to be arranged on the outer layer shell. The spiral pipe is provided with a plurality of injection through holes, and the inner layer shell is also provided with injection through holes at the corresponding positions; the injection through holes of the spiral pipe and the injection through holes of the inner layer shell are fixedly connected and used as liquid outlets, and the liquid outlets face the spring-shaped central area of the spiral pipe, that is, the spoiler.

5. The distributed liquefied medium foam generator of claim 1, wherein, The spoiler is a hollow blade; The flow guide pipe includes an L-shaped single pipe and a spiral single pipe: One end of the L-shaped single pipe is connected with the liquefied medium inlet, and the other end is connected with the spoiler, so that the hollow area inside the spoiler and the inner pipe area of the flow guide pipe are communicated; the L-shaped single pipe is provided with injection through holes on the area close to the spoiler, and the spoiler is also provided with a plurality of injection through holes penetrating the hollow area; The spiral single pipe has one end connected with the end of the L-shaped single pipe close to the liquefied medium inlet, and the other end is closed, and the spiral single pipe spirally surrounds the spoiler; the spiral single pipe is provided with a plurality of injection through holes, and the orifices face the spoiler; The foam injection shell is divided into an inner layer shell and an outer layer shell, and the space between the inner layer shell and the outer layer shell is used as a temperature insulation layer; the outer contour of the spoiler matches the inner wall of the inner layer shell, and the spoiler can be placed in the inner layer shell. The L-shaped single pipe is arranged in the inner layer shell, and the end connected with the liquefied medium inlet penetrates the inner layer shell and the outer layer shell and is connected with the liquefied medium generating device. The spiral single pipe is arranged in the temperature insulation layer between the inner and outer shells; the inner side wall of the inner shell is attached to the outer contour of the spoiler, and the spoiler and the inner shell are fixedly arranged in position; In this way, the liquefied medium enters the spoiler through the flow guide pipe, part of the liquefied medium is sprayed into the inner shell through the spray through hole of the L-shaped single pipe and the spray through hole of the spoiler, and at the same time, another part of the liquefied medium is sprayed towards the spoiler through the spray through hole of the spiral single pipe; the liquefied medium, water and foam are mixed together by impacting the spoiler, and then sprayed out through the foam outlet of the foam spraying shell.

6. A distributed liquefied medium foam generator according to any one of claims 1 to 5, wherein A foam mixing valve is further arranged at the foam liquid inlet position; the foam mixing valve comprises a tubular body, a tension spring and a sealing spoiler plug; The tubular body is a hollow pipe, and a plurality of support connecting rods are fixedly connected to the inner wall of the pipe; the support connecting rods are connected to the center of the tubular body; The sealing spoiler plug is attached and sealed to the opening position at the bottom end of the tubular body; the sealing spoiler plug comprises an upper plate, a middle blade, a bottom sealing plate and a shaft; The upper plate and the bottom sealing plate are arranged in parallel and connected by the shaft; the area of the upper plate is smaller than that of the bottom sealing plate; The middle blade is in the shape of a turbine blade, arranged between the upper plate and the bottom sealing plate and rotating around the shaft as the pivot; The tension spring corresponds to the support connecting rods, and there are a plurality of support connecting rods; one end of the tension spring is connected to the lower end surface of the support connecting rod, and the other end is fixedly connected to the upper end surface of the upper plate; The state of the tension spring ensures that the bottom sealing plate can be tightly closed at the lower end of the tubular body.

7. A distributed liquefied medium foam generating apparatus as defined in claim 6, wherein, The support connecting rod convergence area is provided with a center through hole; the center position of the upper plate is provided with a positioning center rod upwardly, and the positioning center rod passes through the center through hole.

8. A distributed liquefied medium foam generating apparatus as defined in claim 7, wherein, Another layer of positioning layer is arranged in the tubular body, and the structure of the positioning layer is the same as that of the support connecting rods, except that the support connecting rods of the positioning layer are staggered with the support connecting rods connected to the tension spring to avoid the position of the tension spring; the positioning center rod also passes through the center through hole of the positioning layer, and the positioning of the two center through holes further fixes the positioning center rod, so that the sealing spoiler plug moves up and down more stably.

9. The distributed liquefied medium foam generator of claim 7, wherein, The positioning center rod passes through the center through hole; the center through hole has a thickness, and the thickness is designed to ensure that the positioning center rod does not shake in the center through hole and does not swing.

10. The distributed liquefied medium foam generating apparatus of claim 8, wherein, A foolproof design is arranged between the positioning center rod and the center through hole, specifically: The positioning center rod is provided with a protruding strip along the length direction of the positioning center rod, and the side wall of the center through hole is provided with a groove matching the shape of the protruding strip at the position corresponding to the protruding strip; or: The cross section of the positioning center rod and the center through hole are in the shape of a non-circular shape matching each other.

11. A distributed liquefied medium foam generating apparatus as claimed in any one of claims 1 to 5, characterized in that The spoiler adopts a conical spoiler, a threaded spoiler or an SK spoiler.

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