Foam spray gun fire extinguishing device with switchable fire extinguishing medium

Abstract

The invention discloses a fire extinguishing medium switchable foam spray gun fire extinguishing device which comprises a first fire extinguishing tank, a second fire extinguishing tank, a connecting main plate, a three-way pipe, a nozzle, a pressing operation mechanism, a linkage locking mechanism and a pipeline cleaning mechanism. A three-way pipe is arranged on the connecting main plate; and the first fire extinguishing tank, the second fire extinguishing tank and the nozzle are respectively communicated with corresponding ports of the three-way pipe. The fire extinguishing device has the beneficial effects that the fire extinguishing device can improve the fire extinguishing medium switching operation convenience; and through the pipeline cleaning mechanism, automatic impact cleaning can be carried out on the pipeline where the three-way pipe and the nozzle are located, and the situation that the last fire extinguishing medium remains in the pipeline, and normal use of the switched fire extinguishing medium is affected is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of fire extinguishing equipment, in particular to a fire extinguishing medium switchable foam spray gun fire extinguishing device. Background Art

[0002] Fire extinguishers are fire-fighting equipment. Common fire extinguishers include foam fire extinguishers, dry powder fire extinguishers, etc. Different types of fire extinguishers are used to spray corresponding fire extinguishing media to extinguish fires, and the corresponding type of fire extinguisher is selected according to the burning material.

[0003] In the process of firefighting and disaster relief, the existing fire extinguishers use foam fire extinguishers when it is necessary to extinguish water-soluble combustibles, flammable liquids and electrical appliances. When encountering oil, paint, liquid, gas and electrical fires, it is necessary to replace dry powder fire extinguishers. That is, the firefighting scene needs to replace the corresponding fire extinguisher according to the fire situation. For example, the invention patent document with publication number CN115445134A discloses a fire cannon fire extinguishing medium switching judgment method and device. The patent switches the fire extinguishing medium to be sprayed by the fire cannon by comprehensively considering environmental factors and fire information, so as to better utilize the fire cannon function and effectively curb and extinguish the fire.

[0004] The disadvantage of the existing fire extinguishers is that it is not convenient to change different fire extinguishing media to extinguish fires with the existing fire extinguishers. That is, when firefighters are holding foam fire extinguishers to perform fire extinguishing operations, if they encounter burning materials that need to be extinguished by dry powder fire extinguishers, they need to close the foam fire extinguisher in their hands and then take the dry powder fire extinguisher to perform related operations. Although there are also foam fire extinguishers and dry powder fire extinguishers assembled together for switching use in the prior art, the assembled fire extinguishing devices generally spray the corresponding fire extinguishing media through different nozzles when switching to different media. That is, when switching to different media, different nozzle pipelines need to be replaced, and when switching, it is also necessary to promptly close the fire extinguishing medium storage device originally used, and then open the fire extinguishing medium storage device to be used. If the same nozzle pipeline is used, after the corresponding fire extinguishing medium is used, the corresponding fire extinguishing medium is likely to remain in the nozzle pipeline. When the fire extinguishing medium is subsequently switched, the physical and chemical properties of different fire extinguishing media may be different. Mixing them together may cause blockage or affect the spraying effect, thereby affecting the switching of the fire extinguishing medium and resulting in poor use effect. Summary of the invention

[0005] The technical problem to be solved by the present invention is how to provide a foam spray gun fire extinguishing device with switchable fire extinguishing medium.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0007] A fire extinguishing medium switchable foam spray gun fire extinguishing device, comprising a first fire extinguishing tank, a second fire extinguishing tank, a connecting main board, a three-way pipe, a nozzle, a pressing operation mechanism, a linkage locking mechanism and a pipeline cleaning mechanism, wherein the first fire extinguishing tank and the second fire extinguishing tank are both provided with a pressing operation handle, the connecting main board is provided with a three-way pipe, and the first fire extinguishing tank, the second fire extinguishing tank and the nozzle are respectively connected with ports corresponding to the three-way pipe;

[0008] The two ends of the connecting main board are respectively provided with a pressing operating mechanism capable of pressing a pressing operating handle, the pressing operating mechanism comprises a pressing plate, a guide rod, a guide sleeve, a sliding bolt and a first spring, each group of pressing plates is arranged above the corresponding pressing operating handle, one end of each pressing plate is connected to a guide rod, the guide sleeve is correspondingly arranged at the edge of the connecting main board, a first spring is connected between the guide rod and the guide sleeve, and the sliding bolt is slidably arranged at the bottom of the corresponding guide rod;

[0009] A linkage locking mechanism capable of cooperating with the sliding bolts is arranged at the bottom of the first fire extinguishing tank and the second fire extinguishing tank, and driving one set of sliding bolts can cause the other set of sliding bolts to disengage from the linkage locking mechanism;

[0010] Each group of lower pressure plates is provided with a pipeline cleaning mechanism which can be connected with the three-way pipe.

[0011] When one of the fire extinguishing media is used, the present invention only needs to pull down the sliding bolt on one side, so that it drives the corresponding lower pressure plate to descend and act on the corresponding push-type operating handle, and the sliding bolt is inserted into one end of the horizontal pipe for fixing, so that the tank where the corresponding fire extinguishing medium is located is opened, and the corresponding fire extinguishing medium can be sprayed through the nozzle to extinguish the fire. When it is necessary to switch to another fire extinguishing medium, the sliding bolt on the other side is directly pulled down to make it descend and dock into the other end of the horizontal pipe, driving the corresponding lower pressure plate to descend and act on another fire extinguisher tank to open, and the rod core in the horizontal pipe pushes out the original sliding bolt under the pushing action of the switched sliding bolt, which is convenient for the original sliding bolt and the lower pressure plate to reset, so that the tank where the fire extinguishing medium originally used is located is convenient to be closed again, and there is no need to separately operate to close the original fire extinguisher tank body when switching the fire extinguishing medium, and then open the new fire extinguisher tank body, thereby improving the convenience of the fire extinguishing medium switching operation; in addition, the pipeline cleaning mechanism can automatically impact and clean the inside of the pipeline where the three-way pipe and the nozzle are located, so as to avoid the residual of the previous fire extinguishing medium in the pipeline affecting the normal use of the switched fire extinguishing medium.

[0012] Preferably, the linkage locking mechanism comprises a transverse tube and a rod core, the transverse tube is arranged at the bottom of the first fire extinguishing tank and the second fire extinguishing tank, and the rod core is slidably inserted into the transverse tube.

[0013] Preferably, the length of the rod core is smaller than the length of the cross tube.

[0014] Preferably, the pipeline cleaning mechanism includes an elastic telescopic support rod, a stepper motor, a reset start switch assembly, a turntable, and a high-pressure flushing assembly; the elastic telescopic support rod is fixed above the three-way pipe, the stepper motor is fixedly connected to the telescopic end of the elastic telescopic support rod, and the elastic telescopic support rod is also provided with a reset start switch assembly electrically connected to the corresponding stepper motor, the output end of the stepper motor is connected to the turntable, the high-pressure flushing assembly is provided with multiple and circumferentially equidistantly distributed on the turntable, the high-pressure flushing assembly is cooperated with the lower pressure plate, the three-way pipe is fixedly connected with a docking tube, and the end of the docking tube away from the three-way pipe can cooperate with the output end of the high-pressure flushing assembly, and the end of the docking tube close to the three-way pipe is provided with a first one-way valve sheet.

[0015] Preferably, the reset start switch assembly includes a bracket, an elastic mounting plate, a start button switch and an extrusion roller, the bracket is connected to the fixed end of the elastic telescopic support rod, the elastic mounting plate is horizontally movably connected to the top of the bracket, the start button switch is fixedly mounted on the bottom of the elastic mounting plate, and the start button switch is electrically connected to the corresponding stepper motor, the extrusion roller is fixedly set on the telescopic end of the elastic telescopic support rod, and the extrusion roller cooperates with the elastic mounting plate.

[0016] Preferably, the high-pressure flushing assembly includes a high-pressure tank body, a solenoid valve and a nozzle, the high-pressure tank body is fixedly connected to the turntable, the nozzle is arranged at the end of the high-pressure tank body away from the turntable, and the nozzle and the high-pressure tank body are connected through the solenoid valve, the nozzle can cooperate with the docking tube, and a plurality of switch baffles aligned with the solenoid valves are circumferentially distributed on the side of the turntable away from the stepping motor, and the lower pressure plate is cooperated between the correspondingly distributed switch baffles, and each of the switch baffles is installed with a pressure sensing switch electrically connected to the corresponding solenoid valve.

[0017] Preferably, the telescopic end of the elastic telescopic support rod is fixedly connected with a linkage rod, and both ends of the three-way pipe are slidably inserted with a blocking plate, which cooperates with the three-way pipe port, and the blocking plate is correspondingly connected to the linkage rod connected to another group of elastic telescopic support rods.

[0018] Preferably, the inner sides of both ends of the three-way pipe communicating with the first fire extinguishing tank and the second fire extinguishing tank are fitted with second one-way valve sheets.

[0019] Preferably, a U-shaped baffle is fixedly connected to the connecting main board, and the turntable is located inside the U-shaped baffle.

[0020] Preferably, a back plate is fixedly connected to the front side of the connecting main board, and a shoulder strap is connected to the back plate.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. When using one of the fire extinguishing media, the present invention only needs to pull down the sliding bolt on one side to drive the corresponding lower pressure plate to descend and act on the corresponding push-type operating handle, and the sliding bolt is inserted into one end of the horizontal tube to be fixed, so that the tank where the corresponding fire extinguishing medium is located is opened, and the corresponding fire extinguishing medium can be sprayed through the nozzle to extinguish the fire. When it is necessary to switch to another fire extinguishing medium, the sliding bolt on the other side is directly pulled down to make it descend and dock into the other end of the horizontal tube, driving the corresponding lower pressure plate to descend and act on another fire extinguisher tank to open, and the rod core in the horizontal tube pushes out the original sliding bolt under the pushing action of the switched sliding bolt, which is convenient for the original sliding bolt and the lower pressure plate to reset, thereby facilitating the tank where the fire extinguishing medium originally used is located to be re-closed, and there is no need to separately operate to close the original fire extinguisher tank body and then open the new fire extinguisher tank body when switching the fire extinguishing medium, thereby improving the convenience of the fire extinguishing medium switching operation.

[0023] 2. Each time the fire extinguishing medium is switched in the present invention, the corresponding lower pressure plate first descends to act on the switch baffle directly below it, driving the corresponding elastic telescopic support rod to contract, so that the high-pressure tank body that descends synchronously with the telescopic end of the elastic telescopic support rod descends and connects to the docking tube on the three-way pipe, and the pressure sensing switch on the switch baffle is squeezed to open the solenoid valves on the corresponding high-pressure tank body, so that the high-pressure gas in the high-pressure tank body is released into the three-way pipe, and then the three-way pipe and the pipeline where the nozzle is located are automatically impact-cleaned to avoid the previous fire extinguishing medium remaining in the pipeline and affecting the normal use of the switched fire extinguishing medium.

[0024] 3. According to the present invention, each time the fire extinguishing medium is switched, the lower pressure plate on one side descends and the lower pressure plate on the other side rises and resets. The elastic telescopic support rod corresponding to the raised and reset lower pressure plate also rises and resets under the action of the corresponding spring rebound force, thereby driving the arranged extrusion roller to rise. The raised extrusion roller acts on the start button switch on the elastic mounting plate, so that the corresponding stepping motor drives the turntable to operate, and the turntable drives the new high-pressure tank body to rotate to a position where it can cooperate with the docking tube on the three-way pipe. In this way, when switching next time, the gas in the new high-pressure tank body can be relied on to impact and clean the pipeline again, that is, within a certain range of usage times, the pipeline can be automatically cleaned each time the fire extinguishing medium is switched. In this way, there is no need to spare two nozzles and pipelines, and it is avoided that different nozzles need to be replaced when switching the fire extinguishing medium, which increases operations and causes inconvenience in operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of an embodiment of the present invention;

[0026] Figure 2 It is a structural schematic diagram of the first fire extinguishing tank, the second fire extinguishing tank and the connecting mainboard in the present invention;

[0027] Figure 3It is a structural schematic diagram of the cooperative arrangement of the turntable and the stepping motor in the present invention;

[0028] Figure 4 yes Figure 3 The enlarged view of point A in the middle;

[0029] Figure 5 It is a left view of the high-pressure tank body and the rotating disk in the present invention;

[0030] Figure 6 is a top view of the connection between the blocking plate and the linkage rod in the present invention;

[0031] Figure 7 It is a structural schematic diagram of the present invention when the lower pressure plate on one side descends to act on the first fire extinguishing tank;

[0032] Figure 8 yes Figure 7 The enlarged view of point B in the middle;

[0033] Fig. 9 It is a structural schematic diagram of the present invention in which a sliding bolt on one side is inserted into a transverse tube and a sliding bolt on the other side is pushed out. DETAILED DESCRIPTION

[0034] In order to facilitate those skilled in the art to understand the technical solution of the present invention, the technical solution of the present invention is further described in conjunction with the accompanying drawings of the specification.

[0035] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0036] In this application, unless otherwise expressly specified and limited, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, "plurality" means two or more, unless otherwise clearly and specifically limited.

[0037] See also Figures 1 to 8The present embodiment discloses a fire extinguishing medium switchable foam spray gun fire extinguishing device, comprising a first fire extinguishing tank 1, a second fire extinguishing tank 2, a connecting main board 3, a three-way pipe 4, a nozzle 5, a downward pressure operating mechanism 6, a linkage locking mechanism 7 and a pipeline cleaning mechanism 8. In the present embodiment, the first fire extinguishing tank 1 is filled with a foam fire extinguishing medium by a certain pressure, and the second fire extinguishing tank 2 is filled with a dry powder fire extinguishing medium by a certain pressure. The first fire extinguishing tank 1 and the second fire extinguishing tank 2 are symmetrically distributed on the connecting main board 3, and the first fire extinguishing tank 1 and the second fire extinguishing tank 2 are both provided with a head valve and a pressing operating handle 9 on the top. After the safety bolt of the head valve is pulled out, the head valve can be opened by pressing the pressing operating handle 9, which is convenient for the compression tank to release pressure and bring out the fire extinguishing medium, and the pressing operating handle 9 is released, and the pressing operating handle 9 rebounds and resets, and the head valve is closed again, which is convenient for controlling the opening and closing of the fire extinguisher.

[0038] A three-way pipe 4 is fixedly connected to the middle position of the connecting main board 3. The three-way pipe 4 is divided into left and right ports and a middle bottom port. The discharge ends of the first fire extinguishing tank 1 and the second fire extinguishing tank 2 are respectively connected to the left and right ports of the three-way pipe 4 through the pipe body, and the nozzle 5 is connected to the middle bottom port of the three-way pipe 4 through a long hose; the fire extinguishing device also includes a downward pressing operating mechanism 6, a linkage locking mechanism 7 and a pipeline cleaning mechanism 8.

[0039] There are two groups of pressing operating mechanisms 6, which are symmetrically distributed on both sides of the connecting main board 3. The two groups of pressing operating mechanisms 6 include a pressing plate 61, a guide rod 62, a guide sleeve 63, a sliding bolt 64 and a first spring 65. The two pressing plates 61 are respectively aligned and arranged above the corresponding pressing operating handles 9. The two pressing plates 61 are vertically fixedly connected with the guide rod 62 at one end away from the pressing operating handle 9, and the guide rod 62 passes through the edge of the connecting main board 3, and the guide rod 62 can slide up and down relative to the connecting main board 3. It should also be noted here that in this embodiment, guide sleeves 63 are installed on the edges of both sides of the connecting main board 3, and the guide rod 62 passes through the guide sleeve 63 to slide up and down. A first spring 65 is connected between the guide rod 62 and the guide sleeve 63, and the two sliding bolts 64 respectively pass through the bottom of the corresponding guide rod 62 horizontally, and the sliding bolt 64 can slide horizontally relative to the guide rod 62.

[0040] The linkage locking mechanism 7 is fixed to the bottom of the first fire extinguishing tank 1 and the second fire extinguishing tank 2 , and the linkage locking mechanism 7 cooperates with the sliding bolts 64 , and driving one group of sliding bolts 65 can cause the other group of sliding bolts 65 to disengage from the linkage locking mechanism 7 . Specifically, when the sliding bolt 64 on one side relies on the corresponding guide rod 62 to descend and align with the linkage locking mechanism 7, it can be docked and fixed with the linkage locking mechanism 7, thereby ensuring that the lower pressure plate 61 that presses the push-type operating handle 9 remains fixed. In this process, the corresponding first spring 65 is stretched to generate a rebound force, and the pressed push-type operating handle 9 causes the corresponding fire extinguishing tank to open and spray the corresponding fire extinguishing medium. The fire extinguishing medium rushes to the nozzle 5 through the three-way pipe 4 and is sprayed through the nozzle 5. When it is necessary to replace another fire extinguishing medium, the sliding bolt 64 on the other side is directly pulled down to make it cooperate and dock with the linkage locking mechanism 7. In this way, the sliding bolt 64 originally docked in the linkage locking mechanism 7 slides out in a linkage manner, so that the corresponding guide rod 62 is lifted up by relying on the rebound force of the first spring 65, and drives the corresponding lower pressure plate 61 to lift up, so that the corresponding push-type operating handle 9 is reset to close the corresponding fire extinguishing tank.

[0041] There are two groups of pipeline cleaning mechanisms 8, which are respectively arranged at both ends of the three-way pipe 4. The pipeline cleaning mechanisms 8 correspond to the lower pressure plate 61. When the lower pressure plate 61 on one side descends to start the corresponding fire extinguishing tank, the lower pressure plate 61 first acts on the corresponding pipeline cleaning mechanism 8, so that the corresponding pipeline cleaning mechanism 8 runs first to clean the pipeline between the nozzle 5 and the three-way pipe 4, so as to avoid the previously used fire extinguishing medium from remaining in the pipeline and causing blockage, affecting the spraying and use of the switched fire extinguishing medium.

[0042] It should be noted that, in order to start and stop the medium spraying at any time during the process of spraying the fire extinguishing medium, a valve is installed on the nozzle 5 to facilitate the start and stop control of the fire extinguishing medium spraying process.

[0043] In some specific embodiments, in order to facilitate the use of the sliding bolt 64 on one side, the sliding bolt 64 on the other side can be automatically reset by relying on the linkage locking mechanism 7, such as Figure 2 As shown, the linkage locking mechanism 7 includes a transverse tube 71 and a rod core 72. The transverse tube 71 is horizontally fixedly connected between the bottom of the first fire extinguishing tank 1 and the bottom of the second fire extinguishing tank 2. The transverse tube 71 is a through-type tube body. The rod core 72 is slidably inserted into the transverse tube 71. The length of the rod core 72 is less than the length of the transverse tube 71. When one end of the rod core 72 is aligned with the end of the transverse tube 71, the space between the other end and the corresponding end of the transverse tube 71 can just insert a sliding bolt 64 of a corresponding length.

[0044] like Figure 7 As shown, when the sliding bolt 64 on one side is inserted into the transverse tube 71, the end of the sliding bolt 64 abuts against one end of the rod core 72, and the other end of the rod core 72 slides to a position flush with the corresponding end of the transverse tube 71, as shown in FIG. Fig. 9As shown, when the sliding bolt 64 on the other side needs to be switched, the sliding bolt 64 on the other side is directly lowered and then inserted horizontally into the horizontal tube 71. At this time, the sliding bolt 64 pushes the rod core 72, causing the rod core 72 to slide relative to the horizontal tube 71, thereby ejecting the originally inserted sliding bolt 64.

[0045] It should be noted that the ends of the rod core 72 and the sliding bolt 64 are both anti-skid rubber bodies that match the inside of the cross tube 71. In the absence of external force, the rod core 72 and the sliding bolt 64 inside the cross tube 71 can remain relatively stable and avoid sliding and falling off at will.

[0046] In some specific implementation schemes, in order to facilitate the rapid alignment of the sliding bolt 64 with the end of the cross tube 71 after it descends, a positioning cross plate 10 is fixedly connected to the bottom of the cross tube 71, and the two ends of the positioning cross plate 10 extend to the outside of the corresponding ends of the cross tube 71 respectively. When the sliding bolt 64 descends, the sliding bolt 64 is first blocked by the positioning cross plate 10. At this time, the sliding bolt 64 is aligned with the end of the cross tube 71, and then it can be inserted by directly sliding horizontally, which facilitates and quickly completes the operation and improves the convenience of operation.

[0047] In some specific implementation schemes, in order to ensure that each time the fire extinguishing medium is switched, the pipeline between the nozzle 5 and the three-way pipe 4 can be cleaned by the pipeline cleaning mechanism 8, such as Figure 3 As shown, the two sets of pipeline cleaning mechanisms 8 include an elastic telescopic support rod 81, a stepper motor 82, a reset start switch assembly 83, a turntable 84, and a high-pressure flushing assembly 85. The two elastic telescopic support rods 81 are respectively fixedly connected to the two sides above the three-way pipe 4. Specifically, the elastic telescopic support rod 81 includes a telescopic rod 811 and a second spring 812. The second spring 812 connects the fixed end and the telescopic end of the telescopic rod 811 and can be compressed, that is, the elastic telescopic support rod 81 contracts after being compressed and generates a rebound force. The two stepper motors 82 are respectively The retractable end of the corresponding elastic telescopic support rod 81 is fixedly installed. The retractable support rod 81 is also provided with a reset start switch assembly 83 electrically connected to the corresponding stepping motor 82. The output end of each stepping motor 82 is fixedly connected to a turntable 84. A plurality of high-pressure flushing assemblies 85 are provided and circumferentially equidistantly distributed on the turntable 84. The high-pressure flushing assembly 85 is arranged in cooperation with the lower pressure plate 61. The upper sides of both ends of the tee pipe 4 are fixedly connected with a butt pipe 41, and the end of the butt pipe 41 away from the tee pipe 4 cooperates with the high-pressure flushing assembly 85, such as Figure 4 As shown, a first one-way valve plate 11 is provided at one end of the butt-joint tube 41 close to the three-way tube 4. The first one-way valve plate 11 is fitted on the inner bottom of the butt-joint tube 41 connecting to the three-way tube 4, and one end is movably connected to one side edge of the butt-joint tube 41 through a rebound hinge. The first one-way valve plate 11 cannot deflect toward the inside of the butt-joint tube 41 and can only deflect toward the inside of the three-way tube 4, thereby ensuring that the fluid can enter the three-way tube 4 through the butt-joint tube 41 and cannot flow in the reverse direction.

[0048] The reset start switch assembly 83 includes a bracket 831, an elastic mounting plate 832, a start button switch and an extrusion roller 833. The bracket 831 is connected to the fixed end of the elastic telescopic support rod 81. The elastic mounting plate 832 is horizontally movably connected to the top of the bracket 831 through a rebound hinge. The start button switch is fixedly mounted on the bottom of the elastic mounting plate 832, and the start button switch is electrically connected to the corresponding stepping motor 82. The extrusion roller 833 is fixedly set on the telescopic end of the elastic telescopic support rod 81, and the extrusion roller 833 cooperates with the elastic mounting plate 832. Before the elastic telescopic support rod 81 is not compressed, the extrusion roller 833 is aligned at the top of the elastic mounting plate 832. When the elastic telescopic support rod 81 is subjected to external force After the action contracts, it drives the squeezing roller 833 to descend. During the descending process, the squeezing roller 833 squeezes through the elastic mounting plate 832. During this process, the start button switch is at the bottom of the elastic mounting plate 832 and is not affected. When the elastic telescopic support rod 81 rises and resets by relying on the rebound force, it drives the squeezing roller 833 to rise. During this process, the squeezing roller 833 rises and squeezes through the elastic mounting plate 832, and produces a squeezing effect on the start button switch, so that the corresponding stepper motor 82 runs once, and the stepper motor 82 drives the turntable 84 to rotate a certain angle, so that the distributed high-pressure flushing components 85 rotate accordingly. Each time it rotates, there is a group of high-pressure flushing components 85 aligned with the docking pipe 41.

[0049] In some specific embodiments, in order to ensure that the high-pressure flushing assembly 85 aligned with the butt pipe 41 can be started and operated during the lowering process of the lower pressure plate 61, Figure 3 and Figure 5 As shown, the high-pressure flushing assembly 85 includes a high-pressure tank body 851, a solenoid valve 852 and a nozzle 853. The high-pressure tank body 851 is fixedly connected to the turntable 84. The high-pressure tank body 851 is filled with compressed gas at a certain pressure, and other compressed fluids can also be stored according to actual needs. The nozzle 853 is arranged at one end of the high-pressure tank body 851 away from the turntable 84, and the nozzle 853 and the high-pressure tank body 851 are connected through the solenoid valve 852. The solenoid valve 852 controls the on-off between the nozzle 853 and the high-pressure tank body 851. The nozzle 853 cooperates with the docking pipe 41. A plurality of switch baffles 12 aligned with the solenoid valve 852 are circumferentially distributed on one side of the turntable 84 away from the stepping motor 82, and the lower pressure plate 61 is cooperated between the distributed switch baffles 12. Each switch baffle 12 is installed with a pressure sensing switch electrically connected to the corresponding solenoid valve 852, and the initial position of the switch baffle 12 is higher than the position of the push-type operating handle 9. It should be noted that the high-pressure gas or other compressed fluid inside the high-pressure tank 851 is stored in advance and connected to a power supply device installed on the main board 3 to supply power to the solenoid valve 852 and the stepper motor 82 .

[0050] When the lower pressure plate 61 on one side descends, the lower pressure plate 61 first contacts the switch baffle 12 below it, causing the corresponding elastic telescopic support rod 81 to contract, so that the turntable 84 descends accordingly, and the nozzle 853 of the high-pressure tank 851 directly below is aligned with the corresponding docking tube 41. At this time, the nozzle 853 descends and inserts into the docking tube 41 to achieve docking, and the pressure sensing switch on the switch baffle 12 under the downward pressure causes the corresponding solenoid valve 852 to open, thereby facilitating the high-pressure gas in the corresponding high-pressure tank 851 to pass through the nozzle 853 and the docking tube. The pipe 41 is released into the three-way pipe 4, and along the three-way pipe 4 impacts the pipeline between the nozzle 5, flushing out the fire extinguishing medium that may remain blocked in the pipeline, achieving dredging, and avoiding affecting the fire extinguishing medium to be used. Finally, the lower pressure plate 61 descends and acts on the push-type operating handle 9 on the corresponding fire extinguishing tank, so that the corresponding fire extinguishing tank is opened to release the fire extinguishing medium. At this time, the gas in the docked high-pressure tank body 851 has been released. The first one-way valve plate 11 connected to the docking pipe 41 prevents the fire extinguishing medium from leaking from the docking pipe 41. The fire extinguishing medium can flow to the nozzle 5 through the three-way pipe 4 to be sprayed out.

[0051] In some specific embodiments, a second one-way valve plate 13 is fitted on the inner sides of both ends of the three-way pipe 4. The connection method of the second one-way valve plate 13 is the same as that of the first one-way valve plate 11, and the second one-way valve plate 13 is used to prevent the fluid in the three-way pipe 4 from flowing back to the inner side of the discharge end in the fire extinguishing tank, and only allows the fire extinguishing medium to flow into the three-way pipe 4 through the discharge end of the fire extinguishing tank.

[0052] In some specific implementation schemes, when the fire extinguishing medium on one side is used, it is necessary to switch the fire extinguishing medium on the other side. In order to stop the originally released fire extinguishing medium in time when the switch starts, Figure 3 and Figure 6 As shown, the telescopic ends of the two elastic telescopic support rods 81 are fixedly connected with the linkage rod 14, and the two linkage rods 14 are symmetrically distributed about the center point of the three-way pipe 4, and the two ends of the three-way pipe 4 are slidably inserted with sealing plates 15, which cooperate with the ports of the three-way pipe 4 to close the corresponding ports, and the two sealing plates 15 are respectively connected to the corresponding linkage rods 14, that is, the elastic telescopic support rod 81 on the left is connected to the sealing plate 15 on the right through the linkage rod 14, and the elastic telescopic support rod 81 on the right is connected to the sealing plate 15 on the left through the linkage rod 14.

[0053] When the lower pressure plate 61 on one side descends, causing the elastic telescopic support rod 81 on the same side to descend, the elastic telescopic support rod 81 drives the sealing plate 15 on the other side to descend through the corresponding linkage rod 14. Even if the fire extinguisher on the other side is not closed in time at this time, the descending sealing plate 15 can timely block the port of the three-way pipe 4 to prevent the fire extinguishing medium from being input into the three-way pipe 4 by the fire extinguisher on the other side before the lower pressure plate 61 on one side is completely descended, thereby affecting the cleaning effect of the corresponding high-pressure tank body 851 on the pipeline.

[0054] like Figure 1 As shown, in some specific implementation schemes, in order to reduce the hindering effect of the external environment on the movement of the turntable 84 , a U-shaped baffle 16 is fixedly connected to the connecting main board 3 , and the turntable 84 is located on the inner side of the U-shaped baffle 16 .

[0055] In some specific implementation schemes, the fire extinguishing device can be loaded on an existing small trailer according to usage, or can be carried on the body for use. A back plate 17 is fixedly connected to the front side of the main board 3, and a shoulder strap 18 is connected to the back plate 17 for easy carrying.

[0056] In order to facilitate the understanding of the embodiments of this solution by those skilled in the art, the working principle of this solution is briefly described in combination with specific application scenarios:

[0057] The user can carry the entire fire extinguishing device on his back through the shoulder strap 18 for use, or it can be equipped with a trolley for mobile use. Before use, the safety pins on the first fire extinguishing tank 1 and the second fire extinguishing tank 2 are unplugged. When the foam fire extinguishing medium needs to be used first, the sliding bolt 64 close to the side of the first fire extinguishing tank 1 is pulled down. The sliding bolt 64 is blocked after it descends to the position of the positioning horizontal plate 10. At this time, the sliding bolt 64 is aligned with the end of the horizontal tube 71, and then the sliding bolt 64 can be directly inserted into the horizontal tube 71 by sliding horizontally. During the descent of the sliding bolt 64, it drives the corresponding lower pressure plate 61 to descend through the guide rod 62. This process The first spring 65 is stretched to generate a rebound force, and the lower pressure plate 61 presses down the push-type operating handle 9 on the first fire extinguishing tank 1, so that the valve of the first fire extinguishing tank 1 is opened, and the foam fire extinguishing medium compressed in the tank is released by a certain pressure, flows to the nozzle 5 through the three-way pipe 4 and the corresponding pipeline, and is sprayed out by the nozzle 5. When the dry powder fire extinguishing medium needs to be switched to the fire extinguishing medium during the use of the foam fire extinguishing medium due to changes in the combustion material or other external factors, at this time, the sliding bolt 64 close to the side of the second fire extinguishing tank 2 is directly pulled down to make it drop to the positioning horizontal plate 10 and then inserted into the horizontal pipe 71;

[0058] When the sliding bolt 64 near the side of the first fire extinguishing tank 1 is inserted into the interior of one end of the transverse tube 71, the end of the sliding bolt 64 abuts against one end of the rod core 72, and the other end of the rod core 72 slides to a position flush with the other end of the transverse tube 71. In this way, when the sliding bolt 64 near the side of the second fire extinguishing tank 2 is inserted into the transverse tube 71 during the switching operation, the sliding bolt 64 pushes the rod core 72, causing the rod core 72 to slide relative to the transverse tube 71, thereby ejecting the sliding bolt 64 near the side of the first fire extinguishing tank 1, and then the corresponding guide rod 62 drives the lower pressure plate 61 to rise under the action of the rebound force of the first spring 65, so that the pressure on the push-type operating handle 9 on the first fire extinguishing tank 1 is released, and reset is achieved, that is, the first fire extinguishing tank 1 is closed again, and the push-type operating handle 9 on the second fire extinguishing tank 2 is opened under the downward pressure of the corresponding lower pressure plate 61, that is, the fire extinguishing medium is effectively switched, and there is no need to close one fire extinguishing tank first and then open another fire extinguishing tank.

[0059] When the lower pressure plate 61 on one side is lowered to switch the fire extinguishing medium, the lower pressure plate 61 first contacts the switch baffle 12 below it, and causes the corresponding elastic telescopic support rod 81 to contract, so that the turntable 84 is lowered accordingly, and the nozzle 853 of the high-pressure tank 851 directly below is aligned with the corresponding docking tube 41. At this time, the nozzle 853 is lowered and inserted into the docking tube 41 to achieve docking, and the pressure sensing switch on the switch baffle 12 under the downward pressure causes the corresponding solenoid valve 852 to open, thereby facilitating the high-pressure gas in the corresponding high-pressure tank 851 to pass through the nozzle 853 and the docking tube 41 are released into the three-way pipe 4, and impact the pipeline where the nozzle 5 is located along the three-way pipe 4, flushing out the fire extinguishing medium that may remain blocked in the pipeline, achieving dredging, and avoiding affecting the fire extinguishing medium to be used. Finally, the lower pressure plate 61 descends and acts on the pressing operating handle 9 on the corresponding fire extinguishing tank, so that the corresponding fire extinguishing tank opens and releases the fire extinguishing medium. At this time, the gas in the docked high-pressure tank body 851 has been released, and the first one-way valve plate 11 connected to the docking tube 41 prevents the fire extinguishing medium from leaking from the docking tube 41. The fire extinguishing medium can flow to the nozzle 5 through the three-way pipe 4 to be sprayed out.

[0060] When the lower pressure plate 61 on one side descends, causing the elastic telescopic support rod 81 on the same side to descend, the elastic telescopic support rod 81 drives the sealing plate 15 on the other side to descend through the corresponding linkage rod 14. Even if the fire extinguisher on the other side is not closed in time at this time, the descending sealing plate 15 can be used to timely seal the port of the three-way pipe 4 to prevent the fire extinguisher on the other side from inputting fire extinguishing medium into the three-way pipe 4 before the lower pressure plate 61 on one side is completely descended, thereby affecting the cleaning effect of the corresponding high-pressure tank body 851 on the pipeline.

[0061] At the same time, each time the fire extinguishing medium switching operation is performed, since the lower pressure plate 61 on one side descends, the lower pressure plate 61 on the other side rises and resets under the action of the corresponding first spring 65 rebound force, the elastic telescopic support rod 81 corresponding to the ascending and reset lower pressure plate 61 also extends and resets. During this process, the squeezing roller 833 connected to the telescopic end of the elastic telescopic support rod 81 rises and squeezes through the elastic mounting plate 832, and produces a squeezing effect on the start button switch, so that the corresponding stepper motor 82 runs once, and the stepper motor 82 drives the turntable 84 to rotate a certain angle, so that the distributed high-pressure tank body 851 rotates accordingly. Each time it rotates, there is a high-pressure tank body 851 that is aligned with the docking tube 41, that is, it is guaranteed that within a certain range of usage times, there is a usable high-pressure tank body 851 that is aligned with the docking tube 41, which is convenient for effective use when switching the fire extinguishing medium.

[0062] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-limiting from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention, and any reference numerals in the claims should not be regarded as limiting the claims involved.

[0063] The above-described embodiments merely represent implementation methods of the invention. The protection scope of the present invention is not limited to the above-described embodiments. For those skilled in the art, several modifications and improvements may be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A fire extinguishing device with a switchable fire extinguishing medium foam spray gun, characterized in that: It includes a first fire extinguishing tank, a second fire extinguishing tank, a connecting mainboard, a three-way pipe, a nozzle, a pressing operation mechanism, a linkage locking mechanism and a pipeline cleaning mechanism. The first fire extinguishing tank and the second fire extinguishing tank are both provided with a pressing operation handle. The connecting mainboard is provided with a three-way pipe. The first fire extinguishing tank, the second fire extinguishing tank and the nozzle are respectively connected to the ports corresponding to the three-way pipe; The two ends of the connecting main board are respectively provided with a pressing operating mechanism capable of pressing a pressing operating handle, the pressing operating mechanism comprises a pressing plate, a guide rod, a guide sleeve, a sliding bolt and a first spring, each group of pressing plates is arranged above the corresponding pressing operating handle, one end of each pressing plate is connected to a guide rod, the guide sleeve is correspondingly arranged at the edge of the connecting main board, a first spring is connected between the guide rod and the guide sleeve, and the sliding bolt is slidably arranged at the bottom of the corresponding guide rod; A linkage locking mechanism capable of cooperating with the sliding bolts is arranged at the bottom of the first fire extinguishing tank and the second fire extinguishing tank, and driving one set of sliding bolts can cause the other set of sliding bolts to disengage from the linkage locking mechanism; Each group of lower pressure plates is provided with a pipeline cleaning mechanism which can be connected with the three-way pipe.

2. A fire extinguishing medium switchable foam spray gun fire extinguishing device according to claim 1, characterized in that: The linkage locking mechanism comprises a transverse tube and a rod core, wherein the transverse tube is arranged at the bottom of the first fire extinguishing tank and the second fire extinguishing tank, and the rod core is slidably inserted into the transverse tube.

3. A fire extinguishing medium switchable foam spray gun fire extinguishing device according to claim 2, characterized in that: The length of the rod core is smaller than the length of the cross tube.

4. The fire extinguishing medium switchable foam spray gun fire extinguishing device according to claim 1, characterized in that: The pipeline cleaning mechanism includes an elastic telescopic support rod, a stepper motor, a reset start switch assembly, a turntable, and a high-pressure flushing assembly; the elastic telescopic support rod is fixed above the three-way pipe, the stepper motor is fixedly connected to the telescopic end of the elastic telescopic support rod, and the elastic telescopic support rod is also provided with a reset start switch assembly electrically connected to the corresponding stepper motor, the output end of the stepper motor is connected to the turntable, the high-pressure flushing assembly is provided with multiple and circumferentially equidistantly distributed on the turntable, the high-pressure flushing assembly is arranged in cooperation with the lower pressure plate, the three-way pipe is fixedly connected with a docking tube, and the end of the docking tube away from the three-way pipe can cooperate with the output end of the high-pressure flushing assembly, and the end of the docking tube close to the three-way pipe is provided with a first one-way valve sheet.

5. A fire extinguishing medium switchable foam spray gun fire extinguishing device according to claim 4, characterized in that: The reset start switch assembly includes a bracket, an elastic mounting plate, a start button switch and an extrusion roller, the bracket is connected to the fixed end of the elastic telescopic support rod, the elastic mounting plate is horizontally movably connected to the top of the bracket, the start button switch is fixedly mounted on the bottom of the elastic mounting plate, and the start button switch is electrically connected to the corresponding stepping motor, the extrusion roller is fixedly arranged on the telescopic end of the elastic telescopic support rod, and the extrusion roller cooperates with the elastic mounting plate.

6. A fire extinguishing medium switchable foam spray gun fire extinguishing device according to claim 4, characterized in that: The high-pressure flushing assembly includes a high-pressure tank body, a solenoid valve and a nozzle. The high-pressure tank body is fixedly connected to the turntable. The nozzle is arranged at the end of the high-pressure tank body away from the turntable, and the nozzle and the high-pressure tank body are connected through the solenoid valve. The nozzle can cooperate with the docking tube. A plurality of switch baffles aligned with the solenoid valves are circumferentially distributed on the side of the turntable away from the stepper motor, and the lower pressure plate is cooperated between the correspondingly distributed switch baffles. A pressure sensing switch electrically connected to the corresponding solenoid valve is installed on each of the switch baffles.

7. A fire extinguishing medium switchable foam spray gun fire extinguishing device according to claim 4, characterized in that: The telescopic end of the elastic telescopic support rod is fixedly connected with a linkage rod, and both ends of the three-way pipe are slidably inserted with a blocking plate, which cooperates with the three-way pipe port, and the blocking plate is correspondingly connected to the linkage rod connected to another set of elastic telescopic support rods.

8. The fire extinguishing medium switchable foam spray gun fire extinguishing device according to claim 1, characterized in that: The inner sides of both ends of the three-way pipe communicating with the first fire extinguishing tank and the second fire extinguishing tank are fitted with second one-way valve sheets.

9. The fire extinguishing medium switchable foam spray gun fire extinguishing device according to claim 1, characterized in that: A U-shaped baffle is fixedly connected to the connecting main board, and the rotating disk is located inside the U-shaped baffle.

10. The fire extinguishing medium switchable foam spray gun fire extinguishing device according to claim 1, characterized in that: The front side of the connecting main board is fixedly connected with a back plate, and the back plate is connected with a shoulder strap.

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