Compressed air foam fire extinguisher structure

Abstract

The utility model discloses a compressed air foam fire extinguisher structure, and aims to provide a compressed air foam fire extinguisher structure which can quickly replace a storage device after foam liquid is used up. The device comprises a foam release box, an air compressor, a mixing pipe, a telescopic assembly and a spray head, a quick release assembly is installed at one end of the foam release box, the foam release box is detachably connected with one end of the mixing pipe through the quick release assembly, a pressurizing pipe is installed on the mixing pipe and communicated with the mixing pipe, and the pressurizing pipe is communicated with the air compressor. The other end of the mixing pipe is connected with one end of the telescopic assembly, and the other end of the telescopic assembly is detachably connected with the spray head. The foam liquid storage device has the advantages that after foam liquid is used up, the foam liquid storage device can be rapidly replaced, the foam liquid storage device can be rapidly connected with a release pipe, the sealing performance can be improved, the air inlet amount of compressed air can be conveniently changed, gas and liquid can be preliminarily mixed, and the liquid outlet position can be changed.

Description

Technical Field

[0001] This utility model relates to the technical field of fire extinguishing devices, and in particular to a structure of a compressed air foam fire extinguisher. Background Technology

[0002] Fire is one of the most common major disasters threatening social development and public safety, and fire extinguishing technology is essential for protecting people's property and lives. Compressed air foam extinguishing technology, also known as compressed air foam, is a homogeneous foam produced by thoroughly mixing water, foam liquid, and air under certain pressure. Compressed air foam can quickly cover the fire source, isolating oxygen and achieving a rapid fire extinguishing effect. At the same time, the moisture in the foam can effectively reduce the temperature at the fire scene and prevent the fire from spreading. However, most existing fire extinguishing devices use a mixing method, and the devices used to store the foam are mostly fixed connections, making it difficult to replace them in a timely manner when needed, thus preventing timely fire extinguishing.

[0003] Chinese Patent Publication No. CN222517619U, published on February 25, 2018, discloses a carbon dioxide foam fire extinguishing system. The system comprises a foam concentrate storage tank, a fire water storage tank, a foaming and mixing device, mixing pipes, a carbon dioxide storage tank, and a fire sprinkler system. The foaming and mixing device has a first inlet pipe, a second inlet pipe, and a foam outlet pipe. The mixing pipes have an inlet, an air inlet, and an outlet. The foam concentrate storage tank is connected to the first inlet pipe via a first delivery pipe, and the first delivery pipe is sequentially equipped with a first solenoid valve, a first metering pump, and a... The first one-way valve connects the fire water storage tank to the second inlet pipe via a second delivery pipe, which is sequentially equipped with a second solenoid valve, a second metering pump, and a second one-way valve. The foam outlet pipe connects to the inlet via a foam delivery pipe, which is sequentially equipped with a foam solenoid valve, a foam pump, and a foam one-way valve. The carbon dioxide storage tank connects to the inlet via a gas delivery pipe, which is sequentially equipped with a pressure reducing valve, a gas solenoid valve, and a gas one-way valve. The outlet connects to the fire sprinkler via a gas foam output pipe, which is equipped with an output solenoid valve and an output pump. A drawback of this invention is that the foam concentrate storage tank and the foam delivery pipe are fixedly connected, making it difficult to replace when the foam concentrate is insufficient. Utility Model Content

[0004] This invention aims to overcome the shortcomings of existing foam liquid storage tanks, which are difficult to replace when the stock is insufficient, and provides a compressed air foam fire extinguisher structure that allows for quick replacement of the storage device after the foam liquid is used up.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A compressed air foam fire extinguisher structure includes a foam release box, an air compressor, a mixing pipe, a telescopic assembly, and a nozzle. One end of the foam release box is equipped with a quick-release assembly, which is detachably connected to one end of the mixing pipe via the quick-release assembly. A pressurization pipe is installed on the mixing pipe and is connected to the air compressor. The other end of the mixing pipe is connected to one end of the telescopic assembly, and the other end of the telescopic assembly is detachably connected to the nozzle.

[0007] The foam release tank stores the foam concentrate, which is a device for releasing fire extinguishing foam in existing technology. The foam release tank is connected to the mixing tube via a quick-release assembly, which allows for rapid disassembly of the foam release tank and the mixing tube. The foam release tank releases the foam concentrate into the mixing tube. Then, the pressurization pipe on the mixing tank is connected to an air compressor, which supplies compressed air to the mixing tank. The compressed air thoroughly atomizes the foam solution and releases it to atmospheric pressure. The compressed air expands instantaneously, producing uniform foam. After the compressed air and foam concentrate are mixed in the mixing tube, they are sprayed out from the nozzle after passing through a telescopic assembly. The telescopic assembly can flexibly move the nozzle, making it easy to aim the nozzle at the fire source to achieve the fire extinguishing effect. The nozzle and the telescopic assembly are detachably connected, allowing for quick installation of the nozzle. After the foam concentrate in the foam release tank is exhausted, the mixing tube and the foam release tank are quickly separated via the quick-release assembly, allowing for the replacement of a new foam release tank. This achieves the goal of quickly replacing the storage device after the foam concentrate is used up.

[0008] Preferably, the foam release box is equipped with a release pipe that communicates with the foam release box. One end of the release pipe is fitted with a fitting ring, and one end of the mixing pipe is fitted with a plug-in ring. The fitting ring and the plug-in ring are fitted together. The fitting ring has several circumferentially distributed plug rods. One end of each plug rod is connected to the fitting ring, and the other end of each plug rod passes through the plug-in ring and is positioned on the other side of the plug-in ring. The end of each plug rod that passes through the plug-in ring has a fixing hole. Several quick-release components are installed on the side of the plug-in ring. Each quick-release component corresponds to a plug rod. Each quick-release component includes a mounting bracket, a pneumatic cylinder, and a fixing block. The mounting bracket is mounted on the plug-in ring, and the pneumatic cylinder is mounted on the mounting bracket. The pneumatic end of the pneumatic cylinder is connected to the fixing block. The fixing block has a triangular cross-sectional shape, and the fixing block corresponds to the fixing hole. The foam release box releases foam through a release tube. A fitting ring installed on the release tube fits into a connector ring at one end of the mixing tube. Foam liquid is then released into the mixing tank through the release tube. After the fitting ring and connector ring fit together, circumferentially distributed inserts on the fitting ring pass through the connector ring, limiting the fitting ring's position. Then, the quick-release assembly on the connector ring activates, causing a pneumatic cylinder mounted on the mounting bracket to descend. The triangular fixing block descends and inserts into the fixing hole of the insert. As the fixing block gradually descends, its inclined surface gradually pushes the insert rod, causing the fitting ring and connector ring to fit tightly together, improving the sealing effect. To secure the fitting ring, the pneumatic cylinder rises, moving the fixing block away from the fixing hole, thus securing the insert rod. This design allows for quick connection of the release tube.

[0009] Preferably, the release tube has a sealing tube inside. One end of the sealing tube is connected to the release tube, and the other end is placed inside the mixing tube. The sealing tube is truncated cone-shaped, with the smaller diameter end inside the mixing tube. A sealing ring is installed on the inner wall of the mixing tube, and the sealing ring is in contact with the surface of the sealing tube. To improve the sealing performance between the release tube and the mixing tube, a sealing tube is installed on the inner wall of the release tube. One end of the sealing tube is inserted into the mixing tube. As the insertion rod moves the fitting ring and squeezes it against the insertion ring, the sealing tube gradually inserts into the mixing tank. Because the sealing tube is conical, the diameter of the conical sealing tube gradually increases as it enters the mixing tube, thus squeezing the sealing ring installed inside the mixing tube. The outer surface of the sealing tube is tightly fitted with the sealing ring, improving the sealing degree between the release tube and the mixing tank. This design improves the sealing performance.

[0010] Preferably, a recovery block is installed on both sides of the pressurizing pipe, and a recovery groove is provided on the side of the recovery block facing the pressurizing pipe. The recovery groove is connected to the pressurizing pipe, and a narrowing assembly is provided in the recovery groove. The narrowing assembly includes a moving plate and an electric push rod. The electric push rod is placed in the recovery groove, and one end of the electric push rod is connected to the moving plate. The moving plate has a semi-circular cross-sectional shape and is matched with the pressurizing pipe. The pressurization pipe is connected to an air compressor, which is existing technology, and is used to release compressed gas into the mixing pipe. To facilitate increasing the intake volume of compressed air, a constriction assembly is installed inside the pressurization pipe. The constriction assembly changes the intake volume of compressed gas by altering the size of the intake hole of the compression pipe. Recovery blocks are installed on both sides of the pressurization pipe, and constriction assemblies are installed in the recovery grooves on the recovery blocks. Constriction assemblies are installed in the recovery grooves on both sides to constrict the pressurization pipe from both sides. The moving plate of the constriction assembly corresponds to half of the pressurization pipe. The moving block is moved by an electric push rod installed in the recovery groove. One end of the moving block is placed in the recovery groove. The electric push rod can completely retract the moving block into the recovery groove or completely push it out. The semi-circular moving block can constrict the pressurization pipe. This design facilitates changing the intake volume of compressed air.

[0011] Preferably, a stabilizing ball is installed on the mixing tube, and the stabilizing ball has a stabilizing cavity, which is connected to the mixing tube. After the compressed air and foam liquid are mixed in the mixing tube, they enter the stabilizing cavity of the stabilizing ball together. After the foam liquid stays in a larger space, the compressed air and foam liquid can be initially mixed, or the liquid can be stably discharged from the other end of the stabilizing cavity. This design can improve the stability of the liquid discharge.

[0012] Preferably, a rotating assembly is installed inside the stabilizing sphere. The rotating assembly includes a mounting ring and a rotating ring. The mounting ring is placed inside the stabilizing sphere and connected to the inner wall of the stabilizing sphere. The rotating ring is in contact with the inner side of the mounting ring. A retaining ring is installed on the outer side of the rotating ring. A retaining groove is provided on the inner side of the mounting ring. The rotating ring is rotatably connected to the mounting ring through the cooperation of the retaining ring and the retaining groove. The rotating ring is provided with a plurality of evenly distributed impact plates. The impact plates are spiral in shape. One end of the impact plate is connected to the inner side of the rotating ring. The other end of the impact plate is provided with a support column. The support column is located at the axis of the rotating ring. One end of each impact plate is connected to the support column. The foam liquid and compressed air are initially mixed in the stabilizing chamber. To improve mixing efficiency, a rotating component is installed in the stabilizing chamber. The rotating component agitates the compressed air and foam liquid in the stabilizing chamber. The mounting ring of the rotating component fits against the side of the stabilizing chamber on the inner wall of the stabilizing sphere. The rotating ring is mounted on the inner ring of the mounting ring and is rotatably connected to the mounting ring through a groove and a retaining ring. The rotating ring rotates along the annular groove. Several evenly distributed impact plates are installed on the rotating ring. The spiral impact plates are mounted on the rotating plates to receive liquid impacts. The inner sides of the impact plates are connected together by support columns to fix the impact plates and ensure their stability. The liquid impacts the impact plates, driving the spiral impact plates to rotate. The rotation of the impact plates can mix the liquid and compressed air in the stabilizing chamber and form moving foam. This design can initially mix gas and liquid.

[0013] Preferably, the telescopic assembly includes a rear plate, a telescopic tube, and a front plate. A retaining ring is installed on one side of the rear plate, and the retaining ring is placed inside and connected to the mixing tube. One end of the telescopic tube is connected to the rear plate, and the other end is connected to the front plate. The telescopic assembly is installed at the outlet end of the mixing tube. This telescopic assembly can change the foam output position for easier alignment with a flame source. The rear plate of the telescopic assembly is connected to the mixing tube via the retaining ring and fits against the end face of the mixing tube. The front plate and rear plate are connected by the telescopic tube, which is made of a flexible, expandable material. The deformation capability of the telescopic tube allows the front plate to be moved, thus changing the outlet position.

[0014] Preferably, fixed posts are installed on both sides of the front plate. One end of each fixed post is connected to the front plate, and the other end passes through the rear plate and is positioned on the other side of the rear plate. A sliding ring is installed on the rear plate, and a sliding block is installed on the sliding ring. The rear plate has a sliding groove, and the sliding ring is slidably connected to the rear plate through the cooperation of the sliding block and the sliding ring. Fixed rods are installed at both ends of the sliding ring, and each fixed rod corresponds to a fixed post. One end of each fixed rod passes through a fixed post and is positioned on the other side of the fixed post. A pull plate is installed on the sliding ring. When not in use, the telescopic assembly needs to be fixed to facilitate the relocation of the device. Fixing the distance between the front and rear plates completes the fixation of the multiple telescopic tubes. After the telescopic tubes are retracted, the fixed posts of the front plate pass through the rear plate, limiting the front plate. Then, the sliding ring is pushed to move along the sliding groove on the rear plate. The fixed rods on the end face of the sliding ring pass through the holes in the fixed posts, fixing one end of the fixed posts to one side of the rear plate, thereby fixing the fixed posts. The pull plate installed on the sliding ring facilitates pulling. This design facilitates the fixation of the telescopic assembly.

[0015] Preferably, the front plate is equipped with a connector, and the nozzle is provided with a plurality of circumferentially distributed separation plates. One end of the separation plate is connected to the nozzle, and the other end of the separation plate is placed inside the connector and fits against the inner wall of the connector. The separation plate is equipped with a protruding ball, and the separation plate is detachably connected to the connector through the protruding ball. The front plate is provided with a pick-up plate, and the two ends of the pick-up plate are respectively connected to the fixing posts on both sides. The pick-up plate is equipped with a pick-up ring. A connector is installed on the front panel of the telescopic assembly. The connector is used to install the nozzle. A separation plate on one side of the nozzle is inserted into the connector and fits against the inner wall of the connector. The circumferentially distributed separation plates can ensure the stability of the nozzle. A raised ball is installed on the side of the separation plate that fits against the connector. The connector has a groove corresponding to the raised ball. The nozzle can be fixed on the connector by the cooperation of the raised ball and the groove. A pick-up plate is installed on the front panel. The two ends of the pick-up plate are connected to the fixing posts on both sides. The front panel and the nozzle can be moved by the pick-up ring of the pick-up plate. This design facilitates the movement of the nozzle.

[0016] The beneficial effects of this utility model are: the storage device can be quickly replaced after the foam liquid is used up, the release pipe can be quickly connected, the sealing performance can be improved, the intake of compressed air can be easily changed, the stability of the liquid output can be improved, the gas and liquid can be initially mixed, the liquid output position can be changed, the telescopic component can be easily fixed, and the nozzle can be easily moved. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 yes Figure 1 Cross-sectional view;

[0019] Figure 3 yes Figure 1 Schematic diagram of the structure of the foam release box;

[0020] Figure 4 yes Figure 1 Cross-sectional view of the mixing tube;

[0021] Figure 5 yes Figure 1 Schematic diagram of the quick-release assembly;

[0022] Figure 6 yes Figure 2 Schematic diagram of the structure of the narrow-mouth assembly;

[0023] Figure 7 yes Figure 2 Exploded view of the rotating component;

[0024] Figure 8 yes Figure 1 Schematic diagram of the telescopic component;

[0025] Figure 9 yes Figure 8 Schematic diagram of the middle sliding ring;

[0026] Figure 10 yes Figure 1 A schematic diagram of the structure of the central nozzle.

[0027] In the diagram: 1. Foam release box; 11. Release tube; 12. Fitting ring; 13. Insert rod; 14. Fixing hole; 15. Sealing tube; 2. Air compressor; 22. Narrowing assembly; 23. Moving plate; 24. Electric push rod; 3. Mixing tube; 31. Pressurizing tube; 32. Insert ring; 33. Sealing ring; 34. Recycling block; 35. Recycling trough; 36. Stabilizing ball; 37. Stabilizing cavity; 4. Telescopic assembly; 41. Rear plate; 42. Telescopic tube; 43. Front plate; 44. 45. Insert ring; 46. Fixing post; 47. Sliding groove; 48. Inserting pipe; 49. Retrieval plate; 50. Retrieval ring; 61. Nozzle; 52. Separation plate; 63. Raised ball; 74. Quick release assembly; 65. Mounting bracket; 76. Pneumatic cylinder one; 77. Fixing block; 88. Rotating assembly; 79. Mounting ring; 80. Rotating ring; 71. Snap ring; 72. Snap groove; 73. Impact plate; 84. Support post; 85. Sliding ring; 86. Sliding block; 87. Fixing rod; 88. Pull plate. Detailed Implementation

[0028] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0029] like Figure 1 , Figure 2In the embodiment shown, a compressed air foam fire extinguisher structure includes a foam release box 1, an air compressor 2, a mixing pipe 3, a telescopic assembly 4, and a nozzle 5. One end of the foam release box 1 is equipped with a quick-release assembly 6, which is detachably connected to one end of the mixing pipe 3 via the quick-release assembly 6. A pressurization pipe 31 is installed on the mixing pipe 3, and the pressurization pipe 31 is connected to the air compressor 2. The other end of the mixing pipe 3 is connected to one end of the telescopic assembly 4, and the other end of the telescopic assembly 4 is detachably connected to the nozzle 5.

[0030] like Figure 3 , Figure 4 , Figure 5 As shown, a release pipe 11 is installed on the foam release box 1, and the release pipe 11 is connected to the foam release box 1. A fitting ring 12 is installed at one end of the release pipe 11, and a plug-in ring 32 is installed at one end of the mixing pipe 3. The fitting ring 12 and the plug-in ring 32 are fitted together. Several plug rods 13 are provided on the fitting ring 12 in a circular arrangement. One end of the plug rod 13 is connected to the fitting ring 12, and the other end of the plug rod 13 passes through the plug-in ring 32 and is placed on the other side of the plug-in ring 32. One end of the ring 32 is provided with a fixing hole 14. Several quick-release components 6 are installed on the side of the plug-in ring 32. Each quick-release component 6 corresponds to a plug rod 13. Each quick-release component 6 includes a mounting bracket 61, a pneumatic cylinder 62, and a fixing block 63. The mounting bracket 61 is installed on the plug-in ring 32, and the pneumatic cylinder 62 is installed on the mounting bracket 61. The pneumatic end of the pneumatic cylinder 62 is connected to the fixing block 63. The cross-sectional shape of the fixing block 63 is triangular, and the fixing block 63 corresponds to the fixing hole 14.

[0031] The release tube 11 has a sealing tube 15 inside. One end of the sealing tube 15 is connected to the release tube 11, and the other end of the sealing tube 15 is placed inside the mixing tube 3. The sealing tube 15 is shaped like a frustum. The end of the sealing tube 15 with a smaller diameter is placed inside the mixing tube 3. A sealing ring 33 is installed on the inner wall of the mixing tube 3. The sealing ring 33 is in contact with the surface of the sealing tube 15.

[0032] like Figure 6 As shown, a recovery block 34 is installed on both sides of the pressurizing pipe 31. A recovery trough 35 is provided on the side of the recovery block 34 facing the pressurizing pipe 31. The recovery trough 35 is connected to the pressurizing pipe 31. A narrowing assembly 22 is provided in the recovery trough 35. The narrowing assembly 22 includes a moving plate 23 and an electric push rod 24. The electric push rod 24 is placed in the recovery trough 35. One end of the electric push rod 24 is connected to the moving plate 23. The cross-sectional shape of the moving plate 23 is semi-circular. The moving plate 23 matches the pressurizing pipe 31.

[0033] A stabilizing ball 36 is installed on the mixing tube 3, and a stabilizing cavity 37 is provided on the stabilizing ball 36, which is connected to the mixing tube 3.

[0034] like Figure 7 As shown, a rotating assembly 7 is installed inside the stabilizing ball 36. The rotating assembly 7 includes a mounting ring 71 and a rotating ring 72. The mounting ring 71 is placed inside the stabilizing ball 36 and connected to the inner wall of the stabilizing ball 36. The rotating ring 72 fits against the inner side of the mounting ring 71. A retaining ring 73 is installed on the outer side of the rotating ring 72. A retaining groove 74 is provided on the inner side of the mounting ring 71. The rotating ring 72 is rotatably connected to the mounting ring 71 through the cooperation of the retaining ring 73 and the retaining groove 74. Several evenly distributed impact plates 75 are provided on the rotating ring 72. The impact plates 75 are spiral in shape. One end of the impact plate 75 is connected to the inner side of the rotating ring 72. The other end of the impact plate 75 is provided with a support column 76. The support column 76 is located at the axis of the rotating ring 72. One end of each impact plate 75 is connected to the support column 76.

[0035] like Figure 8 , Figure 9 As shown, the telescopic assembly 4 includes a rear plate 41, a telescopic tube 42, and a front plate 43. A ring 44 is installed on one side of the rear plate 41. The ring 44 is placed inside the mixing tube 3 and connected to the mixing tube 3. One end of the telescopic tube 42 is connected to the rear plate 41, and the other end of the telescopic tube 42 is connected to the front plate 43.

[0036] Fixed posts 45 are installed on both sides of the front plate 43. One end of the fixed post 45 is connected to the front plate 43, and the other end of the fixed post 45 passes through the rear plate 41 and is placed on the other side of the rear plate 41. A sliding ring 8 is installed on the rear plate 41, and a sliding block 81 is installed on the sliding ring 8. A sliding groove 46 is provided on the rear plate 41. The sliding ring 8 is slidably connected to the rear plate 41 through the cooperation of the sliding block 81 and the sliding ring 8. Fixed rods 82 are installed at both ends of the sliding ring 8. The fixed rods 82 correspond one-to-one with the fixed posts 45. One end of the fixed rod 82 passes through the fixed post 45 and is placed on the other side of the fixed post 45. A pull plate 83 is installed on the sliding ring 8.

[0037] like Figure 10 As shown, a connector 47 is installed on the front plate 43, and several circumferentially distributed separation plates 51 are provided on the nozzle 5. One end of the separation plate 51 is connected to the nozzle 5, and the other end of the separation plate 51 is placed inside the connector 47 and fits against the inner wall of the connector 47. A protruding ball 52 is installed on the separation plate 51, and the separation plate 51 is detachably connected to the connector 47 through the protruding ball 52. A pick-up plate 48 is provided on the front plate 43, and both ends of the pick-up plate 48 are connected to the fixing posts 45 on both sides respectively. A pick-up ring 49 is installed on the pick-up plate 48.

[0038] When installing the fire extinguishing device, the fitting ring 12 on the release pipe 11 of the foam release box 1 is fitted with the insertion ring 32 of the mixing pipe 3. The insertion rod 13 on the fitting ring 12 passes through the insertion ring 32. Then, the pneumatic cylinder 62 drives the fixing block 63 to descend, which moves the insertion rod 13, thus completing the fitting of the fitting ring 12 and the insertion ring 32. At this time, the release pipe 11 is sealed and connected to the mixing pipe 3 through the fitting of the sealing pipe 15 and the sealing ring 33.

[0039] Then, the air compressor 2 is connected to the nozzle 5 and the mixing pipe 3, the air compressor 2 is connected to the pressurization pipe 31, the separation plate 51 of the nozzle 5 is inserted into the insertion pipe 47, and the nozzle 5 is connected to the insertion pipe 47 by the cooperation of the protruding ball 52 with the inner wall of the insertion pipe 47, thus completing the rapid assembly of the fire extinguishing device.

[0040] After assembly, the foam release box 1 releases foam liquid into the mixing pipe 3 via the universal release pipe 11. The foam liquid enters and fills the stabilizing chamber 37 of the stabilizing ball 36. Simultaneously, the air compressor 2 is started, and compressed air is input into the mixing pipe 3 through the pressurization pipe 31. The compressed air and foam liquid then mix in the mixing pipe 31. The compressed air carries the foam liquid and is output from the other end of the mixing pipe 31. Since the foam liquid fills the stabilizing chamber 37, a stable output of the foam liquid can be ensured, preventing sudden fluctuations in the output.

[0041] When compressed air drives the foam liquid to be output, the compressed air and foam liquid impact the impact plate 75 of the rotating component 7, causing the impact plate 75 and the rotating ring 72 to rotate, thus initially mixing the compressed air and foam liquid, which facilitates the generation of more foam during output.

[0042] When using the nozzle to extinguish a fire, pulling the pull plate 83 causes the sliding ring 8 to move along the sliding groove 46. The sliding ring 8 causes the fixing rod 82 to move away from the fixing post 45 and contact the fixing post 45. The fixing post 54 can then move away from the rear plate 41. Then, the nozzle 5 can be moved through the telescopic tube 42. The front plate 43 and the nozzle 5 can be moved by the pick-up ring 49, and the nozzle 5 can spray the fire source.

[0043] During firefighting, the moving plate 23 can be moved by the electric push rod 24 to narrow the pressure pipe 31, thereby changing the flow rate of compressed gas and thus changing the spray distance of the foam liquid. When the foam liquid in the foam release box 1 is insufficient, the fixing block 63 is lifted by the pneumatic cylinder 62 to release the fixing of the insertion rod 13, thereby quickly replacing the foam release box 1.

Claims

1. A compressed air foam fire extinguisher structure, characterized in that, The device includes a foam release box (1), an air compressor (2), a mixing pipe (3), a telescopic assembly (4), and a nozzle (5). One end of the foam release box (1) is equipped with a quick-release assembly (6). The foam release box (1) is detachably connected to one end of the mixing pipe (3) via the quick-release assembly (6). A pressurizing pipe (31) is installed on the mixing pipe (3). The pressurizing pipe (31) is connected to the mixing pipe (3) and to the air compressor (2). The other end of the mixing pipe (3) is connected to one end of the telescopic assembly (4). The other end of the telescopic assembly (4) is detachably connected to the nozzle (5).

2. The structure of a compressed air foam fire extinguisher according to claim 1, characterized in that, The foam release box (1) is equipped with a release pipe (11), which is connected to the foam release box (1). One end of the release pipe (11) is equipped with a fitting ring (12), and one end of the mixing pipe (3) is equipped with a plug ring (32). The fitting ring (12) fits into the plug ring (32). The fitting ring (12) is provided with several circumferentially distributed plug rods (13). One end of the plug rod (13) is connected to the fitting ring (12), and the other end of the plug rod (13) passes through the plug ring (32) and is placed on the other side of the plug ring (32). The plug rod (13) passes through the plug ring. (32) has a fixing hole (14) at one end. Several quick-release components (6) are installed on the side of the plug ring (32). The quick-release components (6) correspond one-to-one with the plug rod (13). The quick-release components (6) include a mounting bracket (61), a pneumatic cylinder (62) and a fixing block (63). The mounting bracket (61) is installed on the plug ring (32). The pneumatic cylinder (62) is installed on the mounting bracket (61). The pneumatic end of the pneumatic cylinder (62) is connected to the fixing block (63). The cross-sectional shape of the fixing block (63) is triangular. The fixing block (63) corresponds to the fixing hole (14).

3. The structure of a compressed air foam fire extinguisher according to claim 2, characterized in that, The release tube (11) is provided with a sealing tube (15) inside. One end of the sealing tube (15) is connected to the release tube (11), and the other end of the sealing tube (15) is placed inside the mixing tube (3). The sealing tube (15) is shaped like a frustum. The end of the sealing tube (15) with a smaller diameter is placed inside the mixing tube (3). A sealing ring (33) is installed on the inner wall of the mixing tube (3). The sealing ring (33) is in contact with the surface of the sealing tube (15).

4. The structure of a compressed air foam fire extinguisher according to claim 1, characterized in that, Both sides of the pressurizing pipe (31) are equipped with recycling blocks (34). The recycling blocks (34) have recycling grooves (35) on the side facing the pressurizing pipe (31). The recycling grooves (35) are connected to the pressurizing pipe (31). The recycling grooves (35) are equipped with a narrowing assembly (22). The narrowing assembly (22) includes a moving plate (23) and an electric push rod (24). The electric push rod (24) is placed in the recycling groove (35). One end of the electric push rod (24) is connected to the moving plate (23). The moving plate (23) has a semi-circular cross-sectional shape and is matched with the pressurizing pipe (31).

5. The structure of a compressed air foam fire extinguisher according to claim 1, characterized in that, A stabilizing ball (36) is installed on the mixing tube (3), and a stabilizing cavity (37) is provided on the stabilizing ball (36), which is connected to the mixing tube (3).

6. The structure of a compressed air foam fire extinguisher according to claim 5, characterized in that, A rotating assembly (7) is installed inside the stabilizing ball (36). The rotating assembly (7) includes a mounting ring (71) and a rotating ring (72). The mounting ring (71) is placed inside the stabilizing ball (36) and connected to the inner wall of the stabilizing ball (36). The rotating ring (72) is in contact with the inner side of the mounting ring (71). A retaining ring (73) is installed on the outer side of the rotating ring (72). A retaining groove (74) is provided on the inner side of the mounting ring (71). The rotating ring (72) is connected to the inner wall of the stabilizing ball (36) by the retaining ring (73). 73) The rotating ring (72) is connected to the slot (74) and the mounting ring (71) in a rotating manner. The rotating ring (72) is provided with several impact plates (75) that are evenly distributed. The impact plates (75) are spiral in shape. One end of the impact plate (75) is connected to the inner side of the rotating ring (72). The other end of the impact plate (75) is provided with a support column (76). The support column (76) is placed at the axis of the rotating ring (72). One end of the impact plate (75) is connected to the support column (76).

7. The structure of a compressed air foam fire extinguisher according to claim 1, characterized in that, The telescopic assembly (4) includes a rear plate (41), a telescopic tube (42) and a front plate (43). A plug ring (44) is installed on one side of the rear plate (41). The plug ring (44) is placed inside the mixing tube (3) and connected to the mixing tube (3). One end of the telescopic tube (42) is connected to the rear plate (41), and the other end of the telescopic tube (42) is connected to the front plate (43).

8. The structure of a compressed air foam fire extinguisher according to claim 7, characterized in that, Fixed posts (45) are installed on both sides of the front plate (43). One end of the fixed post (45) is connected to the front plate (43), and the other end of the fixed post (45) passes through the rear plate (41) and is placed on the other side of the rear plate (41). A sliding ring (8) is installed on the rear plate (41), and a sliding block (81) is installed on the sliding ring (8). A sliding groove (46) is provided on the rear plate (41). The sliding ring (8) is slidably connected to the rear plate (41) through the cooperation of the sliding block (81) and the sliding ring (8). Fixed rods (82) are installed at both ends of the sliding ring (8). The fixed rods (82) correspond one-to-one with the fixed posts (45). One end of the fixed rod (82) passes through the fixed post (45) and is placed on the other side of the fixed post (45). A pull plate (83) is installed on the sliding ring (8).

9. The structure of a compressed air foam fire extinguisher according to claim 8, characterized in that, The front plate (43) is equipped with a connector (47), and the nozzle (5) is provided with a plurality of circumferentially distributed separation plates (51). One end of the separation plate (51) is connected to the nozzle (5), and the other end of the separation plate (51) is placed inside the connector (47) and fits against the inner wall of the connector (47). The separation plate (51) is equipped with a protruding ball (52), and the separation plate (51) is detachably connected to the connector (47) through the protruding ball (52). The front plate (43) is provided with a pick-up plate (48), and the two ends of the pick-up plate (48) are respectively connected to the fixing posts (45) on both sides. The pick-up plate (48) is equipped with a pick-up ring (49).

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