Auxiliary fire extinguishing device for fire tankers

Abstract

This invention relates to an auxiliary fire extinguishing device for fire tanks, belonging to the technical field of fire tanks. It includes a storage tank with a valve at the bottom and a connecting pipe on one side. A spray assembly is located at the front end of the connecting pipe. The spray assembly includes a handle tube fixedly installed at the front end of the connecting pipe, a compression cylinder fixedly installed on the front side of the handle tube, and several fan-shaped compression plates rotatably installed on the front side of the compression cylinder. An elastic cone is fixedly installed on the opposite sides of the fan-shaped compression plates. A rotating annular cavity is formed inside the compression cylinder. This invention, through the linkage between the conversion assembly and the fan-shaped compression plates, automatically adjusts the opening size of the elastic cone according to the real-time pressure of the extinguishing medium inside the gas pipe. During high-pressure periods, the opening increases to expand the spray range, while during low-pressure periods, the opening narrows to maintain the range, effectively avoiding the problem of insufficient spray distance in the later stages of traditional fire extinguishers.

Description

Technical Field

[0001] This invention relates to the field of fire tank technology, specifically to an auxiliary fire extinguishing device for fire tanks. Background Technology

[0002] Fire tanks are mainly classified into two types according to their pressurization method: permanent pressurization (storage type) and immediate pressurization (gas cylinder type). Fire tanks are one of the most common devices in the fire protection field.

[0003] In the later stages of use, the pressure inside traditional fire tanks continues to drop as the extinguishing medium is released, resulting in a sharp reduction in range and coverage area, which seriously affects the fire extinguishing efficiency. In addition, the outlet size of traditional fire tanks is fixed and cannot be dynamically adjusted according to pressure changes during the spraying process. During the high-pressure period, the spraying range cannot be fully expanded, and during the low-pressure period, the range is insufficient due to the excessively large opening, which affects the fire extinguishing effect of the fire tank.

[0004] To address the aforementioned issues, we propose an auxiliary fire extinguishing device for fire tankers. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides an auxiliary fire extinguishing device for fire tanks. The device automatically adjusts the size of the elastic cone opening based on the real-time pressure of the extinguishing medium inside the gas duct through the linkage of a conversion component and a fan-shaped extrusion plate. During high-pressure periods, the opening increases to expand the spray range, while during low-pressure periods, the opening narrows to maintain the range, effectively avoiding the problem of insufficient spray distance in the later stages of traditional fire extinguishers.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an auxiliary fire extinguishing device for fire tanks, comprising a storage tank, wherein a bottle head valve is provided at the bottom of the storage tank, a connecting pipe is provided on one side of the bottle head valve, and a spraying component is provided at the front end of the connecting pipe; The ejection assembly includes a handle tube fixedly installed at the front end of the connecting tube, an extrusion cylinder fixedly installed on the front side of the handle tube, a plurality of fan-shaped extrusion plates rotatably installed on the front side of the extrusion cylinder, and an elastic cone cylinder fixedly installed on the opposite sides of the plurality of fan-shaped extrusion plates. The extrusion cylinder has a rotating annular cavity inside, and an air guide pipe is fixedly installed on the inner wall of the extrusion cylinder. A conversion component is provided on one side of each of the several fan-shaped extrusion plates inside the air guide pipe.

[0007] Furthermore, a pressure gauge is provided on the side of the bottle head valve away from the connecting pipe, and the handle tube is a rubber tube structure with a protective texture integrally formed on its surface.

[0008] Furthermore, a fixed vertical plate is provided on the rear side of the storage tank, and arc-shaped vertical plates are fixedly installed on the left and right sides of the front of the fixed vertical plate. The upper and lower sides of the surfaces of the two arc-shaped vertical plates are rotatably installed with straps. Connecting bolts are provided on the upper sides of the front of the fixed vertical plate, and a support groove plate is fixedly installed on the front of the fixed vertical plate above the bottle head valve.

[0009] Furthermore, sponge pads are embedded in the opposite sides of the two arc-shaped vertical plates. The sponge pads provide better protection for the surface of the storage tank and prevent scratches. The two corresponding straps on the left and right are fixedly connected at opposite ends by fastening bolts. The inner wall of the support groove plate is in contact with the lower side of the surface of the storage tank.

[0010] Furthermore, a connecting hole plate is fixedly installed on the upper side of the connecting pipe wall, and a fixing bend plate is fixedly installed on the front of the fixing vertical plate on one side of the connecting hole plate. The inner wall of the connecting hole plate and the surface of the fixing bend plate are both engaged with a positioning pin, which ensures the stability of the connecting pipe when it is not in use.

[0011] Furthermore, several of the aforementioned fan-shaped extrusion plates are equidistantly distributed at one end of the extrusion cylinder, and a rotary spring is provided at the rotatable connection position between several of the fan-shaped extrusion plates and the surface of the extrusion cylinder. The rotary spring is used to ensure that the fan-shaped extrusion plates are in an unfolding trend.

[0012] Furthermore, the elastic cone is integrally molded from neoprene rubber, and the handle tube is fixed to the extrusion cylinder by thread fastening. The threaded fixation facilitates the disassembly and installation of the extrusion cylinder, thereby ensuring the reusability of the internal structure of the extrusion cylinder. The front end of the air guide tube extends through to the interior of the elastic cone, and the surface of the air guide tube is fixedly connected to the surface of the elastic cone.

[0013] Furthermore, the conversion assembly includes a fan-shaped arc plate fixedly installed inside one side of the air duct. A first grooved rod is rotatably installed on the side of the fan-shaped arc plate near the inside of the air duct. A second grooved rod is rotatably installed on the inner wall of the first grooved rod. A first support block is rotatably installed on both the front and rear sides of the surface of the second grooved rod away from the first grooved rod. Two tension springs are fixedly installed on the bottom of the second grooved rod near the side of the first grooved rod. A diagonal tie rod is rotatably installed on the inner wall of the second groove rod, and a rotation opening is provided on the inner wall of the rotating ring cavity on one side of the diagonal tie rod. A third groove rod is rotatably connected to the upper side of the surface of the second groove rod. Two second support blocks are rotatably installed on the side of the third groove rod away from the second groove rod. A pressing ball is fixedly installed at the end of the third groove rod away from the diagonal tie rod, and the surface of the pressing ball is in close contact with the surface of the fan-shaped extrusion plate.

[0014] Furthermore, the fan-shaped arc plate is integrally molded from polyurethane rubber. One end of the first groove rod passes through the interior of the air guide pipe and the inner wall of the extrusion cylinder, extending to the interior of the rotating ring cavity. The second groove rod is located inside the rotating ring cavity. One side of the surfaces of the two first support blocks is fixedly connected to the inner wall of the rotating ring cavity. Due to the setting effect of the first support blocks being far away from the first groove rod, the second groove rod is guaranteed to have a labor-saving effect during operation. One end of the two tension springs is fixedly connected to the inner wall of the rotating ring cavity. The upper end of the inclined pull rod extends to the surface of the extrusion cylinder through the inner wall of the rotating opening.

[0015] Furthermore, the surface of the third grooved rod can extend into the interior of the rotating ring cavity through the rotating opening. The two second support blocks are symmetrically distributed around the axis of the third grooved rod. The surfaces of the two second support blocks extend through into the interior of the rotating ring cavity and are fixedly connected to one side of the interior of the rotating ring cavity. The connection position between the second support block and the third grooved rod is eccentrically set, so that the third grooved rod is more labor-saving during operation.

[0016] Compared with the prior art, the present invention provides an auxiliary fire extinguishing device for fire tankers, which has the following beneficial effects: 1. This device automatically adjusts the size of the elastic cone opening according to the real-time pressure of the extinguishing medium inside the gas duct through the linkage of the conversion component and the fan-shaped extrusion plate. When the pressure is high, the opening increases to expand the spray range, and when the pressure is low, the opening narrows to maintain the range, effectively avoiding the problem of insufficient spray distance in the later stage of traditional fire extinguishers.

[0017] 2. The extrusion cylinder and handle tube in this device can be quickly disassembled and assembled via threads, which facilitates regular cleaning and maintenance of internal conversion components, air guide tubes, flexible cones and other structures, effectively improving the equipment's reusability and reducing operating costs.

[0018] 3. The rotating spring in this device keeps the fan-shaped extrusion plate in the extended state under normal conditions, and the pressing ball forms a limit lock on the conversion component, keeping the air duct channel unobstructed and ensuring that the extinguishing agent is smoothly sprayed out on the first use.

[0019] 4. The device uses a sponge pad for protection to prevent scratches on the can, and the straps and fastening bolts ensure stable binding and fixation. It is suitable for various scenarios such as vehicle mounting and wall mounting. The positioning pin can lock the position of the spray component when not in operation to prevent displacement and collision. Attached Figure Description

[0020] Figure 1 This is a perspective view of the entire invention; Figure 2 This is a perspective view of the fixed vertical plate of the present invention. Figure 3 for Figure 2 Enlarged structural diagram of section A in the middle; Figure 4 This is a perspective view of the connecting pipe of the present invention; Figure 5 This is a perspective view of the ejection component of the present invention; Figure 6 This is a vertical sectional perspective view of the ejection component of the present invention; Figure 7 for Figure 6 Enlarged structural diagram of section B in the middle; Figure 8 for Figure 6 Enlarged structural diagram of section C; Figure 9 This is a perspective view of the ejection assembly of the present invention. Figure 10 This is a perspective view of the conversion component of the present invention; Figure 11 for Figure 10 Enlarged structural diagram of section D in the middle; Figure 12 This is a vertical sectional perspective view of the extrusion cylinder of the present invention.

[0021] In the diagram: 1. Storage tank; 101. Fixed vertical plate; 102. Arc vertical plate; 103. Binding strap; 1031. Fastening bolt; 104. Connecting bolt; 105. Supporting groove plate; 2. Bottle head valve; 201. Pressure gauge; 3. Connecting pipe; 301. Connecting orifice plate; 302. Fixing bend plate; 303. Positioning pin; 4. Ejection assembly; 401. Handle pipe; 402. Extrusion cylinder; 403. Fan-shaped extrusion plate; 4031. Rotary spring; 404. Elastic cone; 405. Rotating annular cavity; 406. Air guide pipe; 5. Conversion assembly; 501. Fan-shaped arc plate; 502. First groove rod; 503. Second groove rod; 504. First support block; 505. Tension spring; 506. Diagonal tie rod; 507. Rotation port; 508. Third groove rod; 509. Second support block; 510. Pressing ball. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Please see Figures 1 to 12 The auxiliary fire extinguishing device for fire tank in this embodiment includes a storage tank 1. A bottle head valve 2 is fixedly installed at the bottom of the storage tank 1. A connecting pipe 3 is fixedly connected to the bottle head valve 2 on the side. A spraying component 4 is fixedly installed at the front end of the connecting pipe 3. The ejection assembly 4 includes a handle tube 401, an extrusion cylinder 402, a fan-shaped extrusion plate 403, and an elastic cone 404. The handle tube 401 is fixedly installed at the front end of the connecting tube 3. The handle tube 401 is made of rubber and has a protective texture integrally formed on its surface to facilitate gripping and prevent slipping. The extrusion cylinder 402 is fixedly installed on the front side of the handle tube 401 by a threaded fastening method. The threaded connection structure can realize the quick disassembly and assembly of the extrusion cylinder 402, which facilitates the inspection and reuse of the internal structure of the extrusion cylinder 402. Several sector-shaped extrusion plates 403 are rotatably mounted at equal intervals at the front end of the extrusion cylinder 402. Each sector-shaped extrusion plate 403 is equipped with a rotary spring 4031 at the rotatable connection between it and the extrusion cylinder 402. The rotary spring 4031 can continuously provide elastic driving force to the sector-shaped extrusion plate 403, so that the sector-shaped extrusion plate 403 maintains an outward expansion trend under normal conditions. The relative inner sides of all sector-shaped extrusion plates 403 are fixedly connected to an elastic cone 404. The elastic cone 404 is made of neoprene rubber in one piece and has good elastic deformation ability and flame retardant properties. The extrusion cylinder 402 has a rotating annular cavity 405 with an annular structure inside. An air guide pipe 406 is fixedly installed on the inner wall of the extrusion cylinder 402. The front end of the air guide pipe 406 extends through and into the elastic cone 404 and is fixedly connected to the elastic cone 404. A set of conversion components 5 is provided inside the air guide pipe 406 corresponding to the position of each fan-shaped extrusion plate 403. Each set of conversion components 5 independently corresponds to the fan-shaped extrusion plate 403 to complete the linkage. The conversion assembly 5 includes a fan-shaped arc plate 501, a first groove rod 502, a second groove rod 503, a first support block 504, a tension spring 505, a diagonal tie rod 506, a third groove rod 508, a second support block 509, and a pressing ball 510. A fan-shaped arc plate 501 is fixedly installed inside one side of the air guide pipe 406. The fan-shaped arc plate 501 is integrally molded from polyurethane rubber. A first grooved rod 502 is rotatably installed inside the fan-shaped arc plate 501. One end of the first grooved rod 502 passes through the air guide pipe 406 and the inner wall of the extrusion cylinder 402 and extends into the rotating ring cavity 405. A second grooved rod 503 is rotatably assembled inside the first grooved rod 502. A first support block 504 is rotatably installed on both the front and rear sides of the second grooved rod 503 away from the first grooved rod 502. The first support block 504 is fixedly connected to the inner wall of the rotating ring cavity 405 to provide stable support for the second grooved rod 503 and reduce its rotational running resistance. Two tension springs 505 are fixedly connected to the bottom of the second grooved rod 503 near the first grooved rod 502. The other end of the tension spring 505 is fixedly connected to the inner wall of the rotating ring cavity 405 to achieve elastic reset of the second grooved rod 503. The inner wall of the second grooved rod 503 is rotatably fitted with a diagonal tie rod 506. The extrusion cylinder 402 has a rotation port 507 corresponding to the position of the diagonal tie rod 506, which connects to the rotating annular cavity 405. The upper end of the diagonal tie rod 506 extends to the surface of the extrusion cylinder 402 through the rotation port 507. The upper side of the second grooved rod 503 is rotatably connected to a third grooved rod 508. The third grooved rod 508 can extend into the rotating annular cavity 405 through the rotation port 507. Two second support blocks 509 are symmetrically and rotatably installed on the side of the third grooved rod 508 away from the second grooved rod 503. The surfaces of the two second support blocks 509 extend through the interior of the rotating annular cavity 405. The second support blocks 509 and the third groove rod 508 are eccentrically connected. Due to the setting effect of the first support block 504 being far away from the first groove rod 502, the second groove rod 503 can reduce the rotational resistance of the third groove rod 508 during operation, thus achieving a force-saving transmission. The end of the third groove rod 508 away from the inclined tie rod 506 is fixedly equipped with a pressing ball 510. The surface of the pressing ball 510 is in close contact with the surface of the corresponding fan-shaped extrusion plate 403. A pressure gauge 201 is fixedly installed on the side of the bottle head valve 2 away from the connecting pipe 3, which can monitor the pressure of the fire extinguishing medium inside the storage tank 1 in real time, making it easier to judge the working status of the equipment. A fixed vertical plate 101 is provided on the rear side of the storage tank 1. Arc vertical plates 102 are fixedly installed on the front side of the fixed vertical plate 101 corresponding to the left and right sides of the storage tank 1. Sponge pads are embedded in the inner side of the two arc vertical plates 102 to protect the outer wall of the storage tank 1 and prevent scratches and wear. Straps 103 are rotatably installed on the upper and lower sides of the two arc vertical plates 102. The ends of the two sets of straps 103 opposite to each other are fixedly connected by fastening bolts 1031 to securely bind and fix the storage tank 1. It is suitable for various installation scenarios such as vehicle-mounted and wall-mounted. Connecting bolts 104 are mounted on both sides of the upper front side of the fixed vertical plate 101 for the fixed installation of the whole device. A support groove plate 105 is fixedly installed on the front side of the fixed vertical plate 101 above the bottle valve 2. The inner wall of the support groove plate 105 is in contact with the lower surface of the storage tank 1, which plays a supporting and limiting role for the storage tank 1. A connecting hole plate 301 is fixedly installed on the upper side of the connecting pipe 3. A fixing bend plate 302 is fixedly installed on the front side of the fixing vertical plate 101 at the position corresponding to the connecting hole plate 301. A positioning pin 303 is engaged between the connecting hole plate 301 and the fixing bend plate 302. When the device is not in operation, the positioning pin 303 can be used to position and fix the connecting pipe 3 and the overall spraying assembly 4 to prevent the spraying assembly 4 from shaking or shifting, and to ensure the stability of the equipment storage and placement.

[0024] Working principle The entire device is fixed and limited by the fixed vertical plate 101, the arc vertical plate 102, the strap 103 and the support groove plate 105. The sponge pad protects the tank body, and the connecting bolts 104 fix the entire device. In the non-working state, the positioning pin 303 engages with the connecting hole plate 301 and the fixed bending plate 302 to lock the position of the spray component 4 and prevent displacement or damage when the equipment is idle. The pressure gauge 201 monitors the internal pressure of the storage tank 1 in real time, so that the staff can intuitively judge whether the equipment is in a normal and usable state. When the equipment is not in normal operation, the elastic action of the rotary spring 4031 keeps each sector extrusion plate 403 in an outward-expanded state. The sector extrusion plate 403 limits the third groove rod 508 through the pressing ball 510. The tension spring 505 is kept in a stretched or initially stable state. All conversion components 5 are in a locked standby state. The internal channel of the air pipe 406 is kept unobstructed and there is no extrusion or blockage. When fire extinguishing operations are required, first pull out the positioning pin 303 to release the limiting lock on the connecting pipe 3 and the spraying component 4. The operator holds the handle pipe 401 and opens the cylinder valve 2. The fire extinguishing medium inside the storage tank 1 is introduced into the handle pipe 401 through the cylinder valve 2 and the connecting pipe 3, and is then transported to the position of the elastic cone 404 through the air guide pipe 406 inside the extrusion cylinder 402 to spray out, thus realizing basic fire extinguishing operations. During the fire extinguishing process, the flow of the sprayed material will compress the fan-shaped arc plate 501, causing the fan-shaped arc plate 501 to move inside the vent pipe 406. This causes the first groove rod 502 to drive the second groove rod 503 to rotate eccentrically around the first support block 504. At this time, the second groove rod 503 will pull the diagonal tie rod 506. Under the action of the diagonal tie rod 506 pulling the third groove rod 508, the third groove rod 508 will rotate eccentrically around the second support block 509. During the initial spraying of material, due to the higher initial pressure, the fan-shaped arc plate 501 will be close to the air duct 406. At this time, through the conversion action of the first groove rod 502 and the third groove rod 508, the third groove rod 508 will drive the fan-shaped extrusion plate 403 to expand inward and outward based on the principle of the pressing ball 510. This will increase the opening of the elastic cone 404, which will increase the spray range while increasing the pressure. It can expand the spray range while ensuring the spray distance. If the flow rate in the air duct 406 decreases compared to the initial stage, the tension of the tension spring 505 will drive the above structure to run in the opposite direction. The tension of all tension springs 505 is greater than the rotational force of all rotational springs 4031, which will reduce the opening of the elastic cone 404. This will reduce the nozzle size when the pressure is lower, ensuring the spray distance without affecting the fire extinguishing effect. This can greatly avoid the problem of insufficient spray distance in the later stage of traditional fire extinguishers. Meanwhile, the handle tube 401 and the extrusion cylinder 402 are connected by a threaded detachable connection, allowing the extrusion cylinder 402 to be disassembled periodically to clean and maintain the internal conversion component 5, air guide tube 406, elastic cone 404 and other structures, effectively improving the reusability and service life of the device.

[0025] The installation, connection, or setting methods disclosed in this embodiment are all common mechanical connection methods. Any method that can achieve its beneficial effect can be implemented. In addition, the electrical components in this embodiment are all electrically connected to the main controller and the power supply. The main controller can be a conventional known device such as a computer that plays a control role. Those skilled in the art can control the electrical components through simple programming. Moreover, the existing disclosed power connection technology is also common knowledge in the field. Therefore, the specific structural composition and working principle will not be described in detail in this embodiment.

Claims

1. An auxiliary fire extinguishing device for fire-fighting tanks, comprising a storage tank (1), characterized in that: The storage tank (1) is provided with a bottle head valve (2) at the bottom, and a connecting pipe (3) is provided on one side of the bottle head valve (2). A spraying component (4) is provided at the front end of the connecting pipe (3). The ejection assembly (4) includes a handle tube (401) fixedly installed at the front end of the connecting tube (3). A squeezing cylinder (402) is fixedly installed on the front side of the handle tube (401). A plurality of fan-shaped squeezing plates (403) are rotatably installed on the front side of the squeezing cylinder (402). An elastic cone (404) is fixedly installed on the opposite side of the plurality of fan-shaped squeezing plates (403). The extrusion cylinder (402) has a rotating annular cavity (405) inside. An air guide pipe (406) is fixedly installed on the inner wall of the extrusion cylinder (402). A conversion component (5) is provided on one side of each of the several fan-shaped extrusion plates (403) inside the air guide pipe (406).

2. The auxiliary fire extinguishing device for fire tankers according to claim 1, characterized in that: A pressure gauge (201) is provided on the side of the bottle head valve (2) away from the connecting pipe (3). The handle tube (401) is a rubber tube structure, and the surface of the handle tube (401) is integrally formed with protective texture.

3. The auxiliary fire extinguishing device for fire tankers according to claim 1, characterized in that: A fixed vertical plate (101) is provided on the rear side of the storage tank (1). An arc vertical plate (102) is fixedly installed on the left and right sides of the storage tank (1) in front of the fixed vertical plate (101). A strap (103) is rotatably installed on the upper and lower sides of the surface of the two arc vertical plates (102). A connecting bolt (104) is provided on the upper sides of the front of the fixed vertical plate (101). A support groove plate (105) is fixedly installed on the upper side of the bottle head valve (2) in front of the fixed vertical plate (101).

4. The auxiliary fire extinguishing device for fire tankers according to claim 3, characterized in that: Both sides of the two arc vertical plates (102) are embedded with sponge pads, and the two corresponding straps (103) are fixedly connected at opposite ends by fastening bolts (1031). The inner wall of the support groove plate (105) is in contact with the lower side of the surface of the storage tank (1).

5. The auxiliary fire extinguishing device for fire tankers according to claim 3, characterized in that: A connecting hole plate (301) is fixedly installed on the upper side of the connecting pipe (3), and a fixing bend plate (302) is fixedly installed on the front of the fixing vertical plate (101) on one side of the connecting hole plate (301). The inner wall of the connecting hole plate (301) and the surface of the fixing bend plate (302) are both engaged with a positioning pin (303).

6. The auxiliary fire extinguishing device for fire tankers according to claim 1, characterized in that: Several fan-shaped extrusion plates (403) are equidistantly distributed at one end of the extrusion cylinder (402), and a rotary spring (4031) is provided at the rotatable connection position between the fan-shaped extrusion plates (403) and the surface of the extrusion cylinder (402).

7. The auxiliary fire extinguishing device for fire tankers according to claim 1, characterized in that: The elastic cone (404) is integrally molded from neoprene rubber. The handle tube (401) and the extrusion cylinder (402) are fixed by thread fastening. The front end of the air guide tube (406) extends through into the interior of the elastic cone (404), and the surface of the air guide tube (406) is fixedly connected to the surface of the elastic cone (404).

8. The auxiliary fire extinguishing device for fire tankers according to claim 1, characterized in that: The conversion assembly (5) includes a fan-shaped arc plate (501) fixedly installed inside one side of the air guide tube (406). A first groove rod (502) is rotatably installed in the side of the fan-shaped arc plate (501) near the inside of the air guide tube (406). A second groove rod (503) is rotatably installed on the inner wall of the first groove rod (502). A first support block (504) is rotatably installed on both the front and rear sides of the surface of the second groove rod (503) away from the first groove rod (502). Two tension springs (505) are fixedly installed on the bottom of the second groove rod (503) near the first groove rod (502). The inner wall of the second groove rod (503) is rotatably mounted with a diagonal tie rod (506), and the inner wall of the rotating ring cavity (405) is provided with a rotating opening (507) on one side of the diagonal tie rod (506). The upper side of the surface of the second groove rod (503) is rotatably connected with a third groove rod (508). Two second support blocks (509) are rotatably mounted on the side of the third groove rod (508) away from the second groove rod (503). A pressing ball (510) is fixedly mounted on the end of the third groove rod (508) away from the diagonal tie rod (506), and the surface of the pressing ball (510) is closely attached to the surface of the fan-shaped extrusion plate (403).

9. The auxiliary fire extinguishing device for fire tankers according to claim 8, characterized in that: The fan-shaped arc plate (501) is integrally molded from polyurethane rubber. One end of the first groove rod (502) passes through the interior of the air guide pipe (406) and the inner wall of the extrusion cylinder (402), extending to the interior of the rotating ring cavity (405). The second groove rod (503) is located inside the rotating ring cavity (405). One side of the surface of the two first support blocks (504) is fixedly connected to the inner wall of the rotating ring cavity (405). One end of the two tension springs (505) is fixedly connected to the inner wall of the rotating ring cavity (405). The upper end of the inclined pull rod (506) extends to the surface of the extrusion cylinder (402) through the inner wall of the rotating port (507).

10. The auxiliary fire extinguishing device for fire tankers according to claim 8, characterized in that: The surface of the third groove rod (508) can extend into the interior of the rotating ring cavity (405) through the rotating port (507). The two second support blocks (509) are symmetrically distributed about the axis of the third groove rod (508). The surfaces of the two second support blocks (509) extend through into the interior of the rotating ring cavity (405) and are fixedly connected to one side of the interior of the rotating ring cavity (405).

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