Compressed air foam fire extinguishing device

Abstract

The utility model relates to the technical field of fire-fighting equipment, and discloses a compressed air foam fire extinguishing device which comprises a storage tank, a control module, an air pump and a base, according to the utility model, the linear reciprocating motor is started to drive the cross rod and the ferrule to do reciprocating motion up and down and drive the connecting pipe to do reciprocating motion up and down, so that water, foam liquid and gas conveyed in the connecting pipe shake up and down, the effect of mixing in the conveying process is further realized, the conveying time of a foam extinguishing agent is shortened, and the production efficiency is improved. Meanwhile, in the idle process of the device, an electric hydraulic push rod is started to drive a cleaning brush, a first blocking plate and a second blocking plate to descend, blocking of notches in the upper side and the lower side of a barrel is temporarily relieved, impurities on the surface of a filter screen are cleaned away through the cleaning brush, and the impurities fall off through the notches; and then the first plugging plate and the second plugging plate can be reset, so that internal cleaning can be realized without dismounting the filtering part.

Description

Technical Field

[0001] This utility model relates to the field of fire protection facilities technology, specifically a compressed air foam fire extinguishing device. Background Technology

[0002] Homogeneous foam, produced by thoroughly mixing water, foam concentrate, and air, or by mixing foam premix and air under a certain pressure, can be mixed with water in a suitable mixing ratio to form a concentrated foam mixture. It is also known as foam extinguishing agent. Compressed air foam extinguishing devices consist of a water pump, an air supply pump, a foam concentrate storage tank, foam proportioning equipment, control equipment, valves, pipelines, etc. They are used to release compressed air foam into the protected area according to a predetermined pattern, such as compressed air foam nozzles, compressed air foam spray pipes, compressed air foam cannons, compressed air foam guns, etc.

[0003] Fire extinguishing systems typically have filter components installed in their water supply pipes and foam liquid supply pipes. However, with long-term use, a large amount of impurities accumulate inside these filter components, requiring disassembly and cleaning, which is inconvenient. In addition, the mixing of water, foam liquid, and gas takes time, which slows down the delivery of the foam extinguishing agent and can delay fire suppression efforts. Utility Model Content

[0004] The purpose of this invention is to provide a compressed air foam fire extinguishing device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a compressed air foam fire extinguishing device, comprising a storage tank, a control module, an air pump, and a base, and further comprising:

[0006] A first pipeline is connected to the storage tank. A second pipeline is also provided on one side of the first pipeline. A metering component is provided on the surface of both the first pipeline and the second pipeline. A filter component is provided at the other end of both the first pipeline and the second pipeline.

[0007] A third pipeline is connected to the outlet end of the air pump. Several linear reciprocating motors are bolted to the top of the base. A crossbar is bolted to the output shaft of the linear reciprocating motor. A collar is bolted to the top of the crossbar. A connecting pipe is fixed to the inner wall of the collar. The two ends of the connecting pipe are respectively connected to a main pipe and a fourth pipeline through flexible hoses. A first solenoid valve is installed on the surface of the fourth pipeline.

[0008] Preferably, the connection metering assembly includes a second solenoid valve, a flow meter, and a pump body. The number of the second solenoid valves is two sets, which are respectively connected to the first pipeline and the second pipeline. The number of the flow meters is two sets, which are respectively connected to the first pipeline and the second pipeline. The number of the pump bodies is two sets, which are connected to the first pipeline and the second pipeline.

[0009] Preferably, the filter assembly includes a cylinder, a housing, and an electro-hydraulic push rod. There are two sets of cylinders, each connected to a first pipeline and a second pipeline respectively. The other end of each cylinder is connected to a main pipeline. The housing is bolted to the top of the cylinder. The electro-hydraulic push rod is bolted to the output shaft of the housing. A connecting plate is bolted to the output shaft of the electro-hydraulic push rod. A filter screen is also bolted inside the cylinder. A cleaning brush is fixed to the other side of the connecting plate. A first sealing plate is bolted to the bottom of the connecting plate. Notches are provided on both the upper and lower sides of the cylinder. A connecting rod is hinged to the bottom of the first sealing plate. A second sealing plate is hinged to the bottom end of the connecting rod. Movable columns are bolted to both sides of the second sealing plate. Inclined frames are also bolted to both sides of the cylinder, and the movable columns are slidably connected to the inner walls of the inclined frames.

[0010] Preferably, the surfaces of the first and second sealing plates on opposite sides are both arc-shaped.

[0011] Preferably, the length of the cleaning brush is greater than the diameter of the filter screen.

[0012] Preferably, an electronic pressure gauge and a third solenoid valve are respectively installed on the surface of the third pipeline.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] This invention utilizes a linear reciprocating motor to drive a crossbar and collar to reciprocate up and down, which in turn drives the connecting pipe to reciprocate up and down. This causes the water, foam liquid, and gas transported inside the connecting pipe to sway up and down, achieving a mixing effect during transport and shortening the delivery time of the foam extinguishing agent, thus buying time for fire extinguishing. Simultaneously, when the device is idle, an electric hydraulic push rod is activated to lower the cleaning brush, the first sealing plate, and the second sealing plate, temporarily releasing the seals on the upper and lower openings of the cylinder. The cleaning brush then removes impurities from the filter screen surface, which fall through the openings. Afterward, the first and second sealing plates can reset, thus achieving internal cleaning without disassembling the filter components. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2This is a partial structural diagram of the present invention;

[0017] Figure 3 This is a schematic diagram of the crossbar and collar in this utility model;

[0018] Figure 4 This is a schematic diagram of the structure of the first pipeline in this utility model;

[0019] Figure 5 This is a schematic diagram of the structure of the second pipeline in this utility model;

[0020] Figure 6 This is a schematic diagram of the third pipeline in this utility model;

[0021] Figure 7 This is a cross-sectional view of the middle cylinder of this utility model;

[0022] Figure 8 This is a partial structural diagram of the filter component in this utility model.

[0023] In the diagram: 1. Storage tank; 2. Control module; 3. First pipeline; 4. Second pipeline; 5. Third pipeline; 6. Air pump; 7. Main pipe; 8. Base; 9. Linear reciprocating motor; 10. Crossbar; 11. Collar; 12. Connecting pipe; 13. Fourth pipeline; 14. First solenoid valve; 15. Connecting metering assembly; 151. Second solenoid valve; 152. Flow meter; 153. Pump body; 16. Filter assembly; 161. Cylinder; 162. Box; 163. Electro-hydraulic push rod; 164. Connecting plate; 165. Cleaning brush; 166. First sealing plate; 167. Connecting rod; 168. Second sealing plate; 169. Movable column; 1610. Slanted frame; 1611. Filter screen; 17. Electronic pressure gauge; 18. Third solenoid valve. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figures 1-8As shown, a compressed air foam fire extinguishing device includes a storage tank 1, a control module 2, an air pump 6, and a base 8. The storage tank 1 is connected to a first pipeline 3 and is used to store foam liquid. A second pipeline 4 is also provided on one side of the first pipeline 3. Metering components 15 are provided on the surfaces of both the first pipeline 3 and the second pipeline 4. Filter components 16 are provided at the other ends of both the first pipeline 3 and the second pipeline 4. The second pipeline 4 is connected to an external water supply pipe. A third pipeline 5 is connected to the outlet end of the air pump 6. An electronic pressure gauge 17 and a third solenoid valve 18 are respectively installed on the surface of the third pipeline 5. The electronic pressure gauge 17 is used to measure the air pressure inside the third pipeline 5 and feed it back to the control module 2. The third solenoid valve 18 is used to... To control the opening and closing of the third pipeline 5, the electronic pressure gauge 17 and the third solenoid valve 18 are both electrically connected to the control module 2. Several linear reciprocating motors 9 are bolted to the top of the base 8. A crossbar 10 is bolted to the output shaft of the linear reciprocating motor 9. A collar 11 is bolted to the top of the crossbar 10. A connecting pipe 12 is fixed to the inner wall of the collar 11. The two ends of the connecting pipe 12 are respectively connected to the main pipe 7 and the fourth pipeline 13 through flexible hoses. A first solenoid valve 14 is installed on the surface of the fourth pipeline 13. The fourth pipeline 13 is located in the area requiring fire protection, and each pipe in the pipeline is equipped with a first solenoid valve 14 to realize the control of the area pipeline. The first solenoid valve 14 is electrically connected to the control module 2 and is controlled by the control module 2.

[0026] The metering assembly 15 includes a second solenoid valve 151, a flow meter 152, and a pump body 153. There are two sets of second solenoid valves 151, which are respectively connected to the first pipeline 3 and the second pipeline 4. There are two sets of flow meters 152, which are respectively connected to the first pipeline 3 and the second pipeline 4. There are two sets of pump bodies 153, which are connected to the first pipeline 3 and the second pipeline 4. The second solenoid valve 151 is used to control the opening and closing of the first pipeline 3 and the second pipeline 4. The flow meter 152 is used to monitor the flow rate inside the first pipeline 3 and the second pipeline 4. The pump body 153 is used to transport foam liquid and water.

[0027] The filter assembly 16 includes a cylinder 161, a housing 162, and an electro-hydraulic push rod 163. Two sets of cylinders 161 are connected to the first pipeline 3 and the second pipeline 4, respectively. The other end of each cylinder 161 is connected to the main pipe 7. The housing 162 is bolted to the top of the cylinder 161. The electro-hydraulic push rod 163 is bolted to the output shaft of the housing 162. A connecting plate 164 is bolted to the output shaft of the electro-hydraulic push rod 163. A filter screen 1611 is also bolted inside the cylinder 161. A cleaning filter is fixed to the other side of the connecting plate 164. The cleaning brush 165 has a distribution length greater than the diameter of the filter screen 1611. A first sealing plate 166 is bolted to the bottom of the connecting plate 164. Notches are provided on both the upper and lower sides of the cylinder 161. A connecting rod 167 is hinged to the bottom of the first sealing plate 166. A second sealing plate 168 is hinged to the bottom end of the connecting rod 167. Movable columns 169 are bolted to both sides of the second sealing plate 168. Inclined frames 1610 are also bolted to both sides of the cylinder 161, and the movable columns 169 are slidably connected to the inner wall of the inclined frames 1610.

[0028] During operation, if a fire is detected, control module 2 controls the second solenoid valve 151, the third solenoid valve 18, the pump body 153, the air pump 6, and the linear reciprocating motor 9 to open. The foam liquid inside storage tank 1 enters the interior of cylinder 161 through the first pipe 3. The filter screen 1611 filters impurities from the foam liquid. Water enters the interior of cylinder 161 through the second pipe 4, where the filter screen 1611 filters impurities. Flow meters 152 on both pipes monitor the amount of foam liquid and water being transported and provide feedback to control module 2. Control module 2 controls the amount of foam liquid and water by controlling the start and stop of the second solenoid valve 151 and the pump body 153 to maintain the correct ratio. After passing through cylinder 161, the water and foam liquid enter the main pipe 7. Simultaneously, the air pump 6... After passing through the third pipeline 5 and the third solenoid valve 18, the raw gas enters the main pipe 7. Then, water, foam liquid, and gas enter the main pipe 7 together and then enter the connecting pipe 12. At this time, the control module 2 controls multiple linear reciprocating motors 9 to start synchronously. Their output shafts move repeatedly to drive the crossbar 10, the collar 11, and the connecting pipe 12 to move up and down, thereby shaking the water, foam liquid, and gas inside the connecting pipe 12 to mix them evenly. This achieves the effect of mixing during the transportation process, shortening the delivery time of the foam extinguishing agent. Then, the foam is sprayed out through the nozzle in the fourth pipeline 13 to extinguish the fire. Moreover, the control module 2 mainly controls the opening of the first solenoid valve 14 in the fire area to prevent foam from being sprayed in areas where no fire has occurred, thus avoiding waste.

[0029] Main performance parameters of the compressed air foam generating device: air pressure 0.2~0.4Mpa, foam liquid mixing flow rate range 360~440L / min, mixing ratio 1% (0.8%~1.2%) or 0.5% (0.4%~0.6%), and air supply flow rate range 3.6~4.4m³. 3 / min, with a gas-liquid ratio of 10:1 or 9:1 to 11:1.

[0030] During the device's idle period, if it is necessary to clean the impurities intercepted by the filter screen 1611, simply activate the electric hydraulic push rod 163 to extend its output shaft, causing the connecting plate 164 and the first sealing plate 166 to descend. This, in turn, causes the cleaning brush 165 and the connecting rod 167 to descend. The connecting rod 167 then pushes the lower second sealing plate 168 downward, causing the movable column 169 to move along the direction of the inclined frame 1610. This allows the second sealing plate 168 to move diagonally downward, thus removing the lower part of the notch in the cylinder 161. The cleaning brush 165 then contacts the filter screen 1611, removing the accumulated impurities. The impurities are cleaned off and fall through the notch below the cylinder 161. Then, the output shaft of the electric hydraulic push rod 163 is shortened, which drives the first sealing plate 166 to rise. Then, the first sealing plate 166 pulls the second sealing plate 168 to rise through the connecting rod 167. Finally, the cleaning brush 165 returns to the inside of the box 162. The first sealing plate 166 and the second sealing plate 168 then reseal the notches on the upper and lower sides of the cylinder 161. The surfaces of the first sealing plate 166 and the second sealing plate 168 on opposite sides are designed with an arc shape to adapt to the inner wall of the cylinder 161 after closing.

[0031] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A compressed air foam extinguishing apparatus comprising a storage tank (1), a control module (2), an air pump (6) and a base (8), characterized in that, Also include: The first pipeline (3) is also provided with a second pipeline (4) on one side, and the surfaces of the first pipeline (3) and the second pipeline (4) are provided with a connecting metering assembly (15), and the other ends of the first pipeline (3) and the second pipeline (4) are provided with a filtering assembly (16); The third pipeline (5) is communicated to the outlet end of the air pump (6), the top of the base (8) is bolted with a plurality of linear reciprocating motors (9), the output shaft of the linear reciprocating motor (9) is bolted with a cross bar (10), the top of the cross bar (10) is bolted with a sleeve ring (11), the inner wall of the sleeve ring (11) is fixed with a connecting pipe (12), and the two ends of the connecting pipe (12) are respectively communicated with a main pipe (7) and a fourth pipeline (13) through a hose, and the surface of the fourth pipeline (13) is provided with a first electromagnetic valve (14).

2. A compressed air foam extinguishing apparatus according to claim 1, characterised in that: The connecting metering assembly (15) comprises two groups of second electromagnetic valves (151), two groups of flow meters (152) and two groups of pump bodies (153), the two groups of second electromagnetic valves (151) are respectively communicated with the first pipeline (3) and the second pipeline (4), the two groups of flow meters (152) are respectively communicated with the first pipeline (3) and the second pipeline (4), and the two groups of pump bodies (153) are respectively communicated with the first pipeline (3) and the second pipeline (4).

3. A compressed air foam extinguishing apparatus according to claim 1, characterized in that: The filtering assembly (16) comprises a cylinder body (161), a box body (162) and an electric hydraulic push rod (163), the two groups of cylinder bodies (161) are respectively communicated with the first pipeline (3) and the second pipeline (4), the other end of the cylinder body (161) is communicated with the main pipe (7), the box body (162) is bolted to the top of the cylinder body (161), the output shaft of the electric hydraulic push rod (163) is bolted to the box body (162), the output shaft of the electric hydraulic push rod (163) is bolted with a connecting plate (164), the inside of the cylinder body (161) is also bolted with a filter screen (1611), the other side of the connecting plate (164) is fixed with a cleaning brush (165), the bottom of the connecting plate (164) is bolted with a first blocking plate (166), the upper and lower sides of the cylinder body (161) are both provided with notches, the bottom of the first blocking plate (166) is hingedly provided with a connecting rod (167), the bottom end of the connecting rod (167) is hingedly provided with a second blocking plate (168), the two sides of the second blocking plate (168) are both bolted with a movable column (169), and the two sides of the cylinder body (161) are also bolted with an inclined frame (1610), and the movable column (169) and the inner wall of the inclined frame (1610) are in sliding connection.

4. A compressed air foam extinguishing apparatus according to claim 3, characterised in that: The surfaces of the first blocking plate (166) and the second blocking plate (168) on the opposite sides are arc-shaped.

5. A compressed air foam extinguishing apparatus according to claim 3, characterised in that: The distribution length of the cleaning brush (165) is greater than the diameter of the filter screen (1611).

6. A compressed air foam extinguishing apparatus according to claim 1, characterized in that: The surface of the third pipeline (5) is respectively provided with an electronic pressure gauge (17) and a third electromagnetic valve (18).

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