A fire extinguisher filling device

Abstract

This utility model belongs to the field of fire extinguisher filling technology, specifically relating to a fire extinguisher filling device, including a support, a conveying module, a feeding module, a filling execution module, a positioning module, and a control module. The conveying module uses a drive motor to drive a conveyor belt to transport fire extinguishers; the positioning module's limiting plate is driven to rotate by a hydraulic cylinder, cooperating with a limiting groove to achieve precise positioning of the fire extinguisher; the nozzle of the filling execution module is driven vertically by a hydraulic cylinder to adapt to fire extinguisher canisters of different heights; the feeding module's storage tank and dispensing tank are connected by pipelines, and a pump and solenoid valve, under the control of a PLC control cabinet, achieve quantitative delivery of dry powder; a weight sensor in the dispensing tank and a nozzle position sensor provide real-time data feedback to the PLC to ensure accurate filling volume; a return port is provided at the top of the storage tank, allowing excess dry powder in the dispensing tank to flow back to the storage tank. This device, through the coordinated operation of multiple modules, achieves full automation of the fire extinguisher process from conveying, positioning, height adjustment to quantitative filling.

Description

Technical Field

[0001] This utility model relates to the field of fire extinguisher filling technology, specifically a fire extinguisher filling device. Background Technology

[0002] As an important fire-fighting equipment, the quality of the dry powder filling of fire extinguishers directly affects their fire-extinguishing performance and safety. Currently, the filling of dry powder fire extinguishers mainly relies on manual labor or semi-automatic equipment, and the existing technology has the following drawbacks:

[0003] On the one hand, traditional filling devices mostly rely on manual positioning, where fire extinguishers are placed below the filling nozzle manually. This can easily lead to misalignment between the fire extinguisher and the nozzle due to operational errors, resulting in dry powder leakage or insufficient filling. Furthermore, the conveying devices are mostly simple conveyor belts that lack precise limiting structures, making it easy for fire extinguishers to shift during the conveying process, further reducing filling efficiency.

[0004] On the other hand, the filling volume control relies on manual weighing or rough volume measurement, which cannot monitor the amount of dry powder in the dispensing tank and the filling status of the fire extinguisher in real time: if manual weighing is used, it is time-consuming, labor-intensive and subject to human error.

[0005] Chinese Patent CN111114864A discloses a fire extinguisher filling device, including a platform and a storage tank. The storage tank, with a trapezoidal cross-section, is located on the top of the platform and has a feed inlet at its top. Connecting plates are fixed to both sides of the storage tank and are fixedly connected to the top of the platform. This invention uses a PLC control box, along with an infrared generator and receiver, to control the operation of a transmission assembly. A first fixing plate, in conjunction with a limiting assembly, can fix fire extinguisher canisters of different diameters. The transmission assembly controls the opening and closing of the dispensing assembly, thus filling the fire extinguisher canisters. As the fire extinguisher is filled, its weight increases, causing it to descend. After a certain amount of dry powder is added, the fire extinguisher descends until the signal emitted by the infrared generator is received by the infrared receiver. At this point, the transmission assembly controls the dispensing assembly to close, completing the filling process. However, this device, using a fixed dispensing assembly, cannot accommodate fire extinguisher canisters of different heights. Summary of the Invention

[0006] The present invention aims to solve the above-mentioned prior art by adjusting the nozzle height according to the size of the fire extinguisher, thereby improving the applicability of the fire extinguisher filling device.

[0007] The technical solutions adopted in this utility model are as follows:

[0008] A fire extinguisher filling device includes a support frame, a conveying module, a feeding module, a filling execution module, a positioning module, and a control module;

[0009] The conveying module includes a support frame, a drive motor, and a conveyor track. The conveyor track is mounted on the support frame, and the output end of the drive motor drives the conveyor track to rotate horizontally along the support frame.

[0010] The feeding module includes a storage tank, a dispensing tank, and pipelines, with the storage tank connected to the dispensing tank via pipelines; the filling execution module includes a nozzle and a hydraulic cylinder for driving the nozzle, with the nozzle located directly above the conveyor belt;

[0011] The dispensing tank is fixed to the top of the support, the support is provided with a connecting plate, and the nozzle is fixed to the connecting plate; the hydraulic cylinder that drives the nozzle is fixed to the support, and its telescopic end is connected to the connecting plate to drive the nozzle to move vertically along the support.

[0012] The positioning module includes two limiting plates and hydraulic cylinders that drive the two limiting plates respectively. The limiting plates are all hinged to the support frame.

[0013] The hydraulic cylinder of the limiting plate is fixed to the support frame, and its output end is connected to the top of the limiting plate to drive the limiting plate to rotate around the support frame, thereby restricting the fire extinguisher to be filled to below the nozzle.

[0014] By adopting the above technical solutions, the support frame serves as the basic load-bearing structure, stably fixing key components such as the dispensing tank and the hydraulic cylinder driving the nozzle, ensuring the overall structural rigidity. In the conveying module, the drive motor and conveyor belt are assembled through the support frame to achieve automatic horizontal conveying of fire extinguishers, reducing swaying and improving production continuity. The storage tank and dispensing tank in the feeding module are connected by pipelines to form a "main storage-distribution" path, ensuring a continuous supply of materials. In the filling execution module, the hydraulic cylinder driving the nozzle is linked with the connecting plate and the nozzle, driving the nozzle to move vertically to adapt to fire extinguisher can openings of different heights, avoiding leakage and improving adaptability. The limiting plate of the positioning module is hinged to the support frame and driven by the hydraulic cylinder to rotate and clamp the fire extinguisher, preventing conveying deviation and ensuring accurate positioning during filling. The various modules work together to achieve full automation of the conveying, positioning, and filling process, effectively expanding the applicability of the device to fire extinguishers of different sizes and significantly improving production efficiency and filling reliability.

[0015] Furthermore, the control module includes a PLC control cabinet, which is electrically connected to the hydraulic cylinder of the drive nozzle, the hydraulic cylinder of the limit plate, and the drive motor.

[0016] By adopting the above technical solution, when the drive motor drives the conveyor belt to transport the fire extinguisher to the designated position, the PLC control cabinet can simultaneously trigger the hydraulic cylinder of the limit plate to precisely control the rotation of the limit plate to clamp the fire extinguisher. Simultaneously, according to a preset program or real-time feedback, the PLC control cabinet drives the hydraulic cylinder of the nozzle to adjust the vertical height of the nozzle, ensuring alignment with the fire extinguisher canister opening. After filling, the PLC control cabinet can then sequentially control the limit plate to release and the conveyor belt to continue moving, forming an automated closed-loop operation. This integrated control avoids the lag and errors of manual intervention, ensuring close coordination between components and significantly improving the efficiency, accuracy, and production stability of the filling process.

[0017] Furthermore, the support frame is provided with a limiting groove that is directly opposite to the limiting plate.

[0018] By adopting the above technical solution, the bottom or edge of the limiting plate is embedded in the limiting groove. The physical constraint of the groove restricts the rotation range of the limiting plate, ensuring that it stops precisely at the preset clamping position. At the same time, the limiting groove provides additional support for the limiting plate, dispersing the reaction force of the fire extinguisher on the limiting plate during clamping, reducing deformation or displacement of the limiting plate caused by uneven force, and enhancing the stability of the clamping structure. This design ensures that the fire extinguisher is constrained by both the limiting plate and the limiting groove, further ensuring that its position on the conveyor belt is strictly aligned with the nozzle directly below, avoiding filling misalignment caused by the shaking or positional deviation of the limiting plate, and significantly improving the accuracy of fire extinguisher positioning and the reliability of the filling process.

[0019] Furthermore, four dispensing tanks are provided, each dispensing tank is equipped with a weight sensor, and the nozzle is equipped with a position sensor. Both the weight sensor and the position sensor are electrically connected to the PLC control cabinet.

[0020] By adopting the above technical solution, four dispensing tanks can simultaneously fill four fire extinguishers, significantly improving the efficiency of a single filling. The weight sensor in each dispensing tank monitors the remaining dry powder in real time and feeds it back to the PLC control cabinet, ensuring that the material in the dispensing tank is sufficient and the filling amount is accurate and controllable. The position sensor of the nozzle detects its vertical height in real time and transmits it to the PLC. After comparing it with the preset height, the hydraulic cylinder driving the nozzle is adjusted to ensure that the nozzle is accurately aligned with the mouth of the fire extinguisher of different sizes. By integrating the weight and position data, the PLC dynamically coordinates the dispensing tank feeding, nozzle height adjustment and conveying positioning process, realizing automated filling with multi-station synchronization, accurate measurement and strong adaptability, which not only improves production efficiency, but also ensures the stability of fire extinguisher filling quality.

[0021] Furthermore, the feeding module also includes a pump and a solenoid valve. The pump is installed on the pipeline between the storage tank and the dispensing tank, and the solenoid valve is installed on the pipeline between the pump and the storage tank. The solenoid valve is electrically connected to the PLC control cabinet.

[0022] By adopting the above technical solution, the pump is installed in the pipeline between the storage tank and the dispensing tank, providing active driving force for the flow of dry powder and avoiding supply jams caused by insufficient gravity or dry powder agglomeration, thus ensuring stable material delivery from the storage tank to the dispensing tank. The solenoid valve is located in the pipeline between the pump and the storage tank and is electrically connected to the PLC. Controlling its on / off state or opening degree via the PLC allows for precise adjustment of the dry powder delivery volume and timing. This ensures efficient material supply and enables dynamic adjustment of the supply volume. Combined with weight monitoring in the dispensing tank, the material supply process is highly matched to filling requirements, significantly improving the accuracy of material management and production continuity of the equipment.

[0023] Furthermore, the storage tank is provided with a reflux port at the top, and the dispensing tank is connected to the reflux port through a pipe.

[0024] By adopting the above technical solution, when the amount of dry powder in the dispensing tank exceeds the preset value or when excessive material is supplied due to pressure fluctuations, the excess dry powder can be automatically returned to the storage tank through the return port via a pipeline, avoiding material waste and equipment contamination caused by the overflow of the dispensing tank. At the same time, the return design ensures that the amount of material in the dispensing tank is always reasonable, ensuring stable dry powder flowability during subsequent filling. In addition, the storage tank, as the main storage container, has a larger capacity and can efficiently receive the returned dry powder, maintain the material balance in the system, reduce the need for frequent manual replenishment or cleaning, and significantly improve the material management efficiency and operational reliability of the device.

[0025] This utility model has the following beneficial effects:

[0026] 1. This utility model achieves automatic horizontal conveying and dynamic clamping positioning of fire extinguishers by using the drive motor of the conveyor module and the support frame of the conveyor belt, combined with the positioning module's limiting plate, hydraulic cylinder of the limiting plate and limiting groove. When the conveyor belt conveys the fire extinguisher at a uniform speed to below the nozzle, the hydraulic cylinder limiting plate rotates and embeds into the limiting groove, stably restricting the fire extinguisher in a fixed position, avoiding the displacement caused by conveyor shaking in traditional manual or passive clamping structures, and significantly improving the positional accuracy during filling.

[0027] 2. This utility model achieves automatic adjustment of nozzle height by linking the hydraulic cylinder driving the nozzle of the filling execution module with the connecting plate and the nozzle, in conjunction with the PLC control cabinet of the control module and the nozzle position sensor. The position sensor feeds back the nozzle height to the PLC in real time, and the hydraulic cylinder drives the nozzle to move vertically according to the preset program, accurately adapting to the nozzle opening height of different specifications of fire extinguishers, thus solving the problem of dry powder leakage or insufficient filling caused by the height mismatch of traditional fixed nozzles.

[0028] 3. This utility model achieves precise quantitative supply of dry powder by combining the storage tank, dispensing tank, pump and solenoid valve of the feeding module with the PLC control cabinet of the control module and the weight sensor in the dispensing tank: the weight sensor monitors the amount of dry powder in the dispensing tank in real time and feeds it back to the PLC. The PLC controls the opening and closing of the solenoid valve and the start and stop of the pump, dynamically adjusting the amount of material supplied from the storage tank to the dispensing tank, avoiding overfilling or underfilling caused by traditional manual weighing or time control, and ensuring the stability of the fire extinguisher filling quality.

[0029] 4. This utility model connects the top return port of the storage tank of the feeding module to the pipeline of the dispensing tank. When there is an excess of dry powder in the dispensing tank, the excess material is automatically returned to the storage tank through the pipeline. This avoids the material waste and equipment pollution caused by the overflow of the dispensing tank due to overfilling in traditional devices. At the same time, it maintains the stability of the material quantity in the dispensing tank and improves the flowability of dry powder and filling efficiency. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0031] Figure 2 This is a schematic diagram of the assembly of the limiting plate and the hydraulic cylinder of this utility model;

[0032] Figure 3 This is a schematic diagram of the filling execution module of this utility model;

[0033] Figure 4 This is a schematic diagram of the material supply module of this utility model.

[0034] Wherein: 10-bracket; 11-connecting plate;

[0035] 20-Transmission module; 21-Support frame; 22-Drive motor; 23-Transmission track;

[0036] 30-Feeding module; 31-Storage tank; 32-Dispensing tank; 33-Pipeline; 34-Pump; 35-Solenoid valve; 36-Return port;

[0037] 40 - Filling execution module; 41 - Nozzle; 42 - Hydraulic cylinder;

[0038] 50 - Positioning module; 51 - Limiting plate; 52 - Second hydraulic cylinder; 53 - Limiting groove;

[0039] 60 - Control module; 61 - PLC control cabinet. Detailed Implementation

[0040] The present invention will now be described in further detail with reference to the accompanying drawings and specific preferred embodiments.

[0041] In the description of this utility model, it should be understood that the terms "left side," "right side," "upper part," "lower part," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. "First," "second," etc., do not indicate the importance of the components, and therefore should not be construed as a limitation of this utility model. The specific dimensions used in this embodiment are only for illustrating the technical solution and do not limit the protection scope of this utility model.

[0042] Reference Figure 1 , Figure 2 and Figure 3As can be seen, in this utility model, a fire extinguisher filling device has a feeding module 30 with a dispensing tank 32 fixed on the top of the support 10. The dispensing tank 32 is connected to the storage tank 31 through the pipe 33. The storage tank 31 is usually located on the side or below the support 10. The dry powder is conveyed from the storage tank 31 to the dispensing tank 32 through the pipe 33. A connecting plate 11 is provided in the middle of the support 10. The nozzle 41 of the filling execution module 40 is fixed to the connecting plate 11. The second hydraulic cylinder 52 that drives the nozzle 41 is fixed to the top of the support 10. Its telescopic end is connected to the connecting plate 11, so that the second hydraulic cylinder 52 can drive the connecting plate 11 and the nozzle 41 to move in the vertical direction of the support 10, ensuring that the nozzle 41 is directly above the conveyor belt 23. The support frame 21 of the conveying module 20 is located below or beside the bracket 10. The conveying track 23 is installed on the support frame 21. The drive motor 22 is fixed to one end of the support frame 21, and its output end is connected to the conveying track 23, driving the conveying track 23 to rotate horizontally along the support frame 21 to convey the fire extinguisher to be filled. The two limiting plates 51 of the positioning module 50 are hinged to the two side edges of the support frame 21. The second hydraulic cylinder 52 of the limiting plate 51 is fixed to the top or side of the support frame 21, and its output end is connected to the top of the corresponding limiting plate 51. The hydraulic cylinder 52 extends and retracts the limiting plate 51 to rotate around the hinge point, thereby forming a clamping space above the conveying track 23, restricting the fire extinguisher directly below the nozzle 41. The support frame 21 is also provided with a limiting groove 53 opposite to the limiting plate 51. When the limiting plate 51 rotates to the clamping position, its bottom or edge is embedded in the limiting groove 53, further fixing the position of the limiting plate 51. The PLC control cabinet 61 of the control module 60 is usually fixed to the side or top of the bracket 10 and is electrically connected to the second hydraulic cylinder 52 driving the nozzle, the hydraulic cylinder 52 of the limit plate, and the drive motor 22 to achieve unified control of each actuator. The weight sensor 62 in the dispensing tank 32 and the position sensor 63 on the nozzle 41 are electrically connected to the PLC control cabinet 61 to provide real-time feedback on the amount of dry powder in the dispensing tank 32 and the height of the nozzle 41. The pump 34 and the solenoid valve 35 of the feeding module 30 are set on the pipe 33 between the storage tank 31 and the dispensing tank 32. The pump 34 is closer to the dispensing tank 32 and the solenoid valve 35 is closer to the storage tank 31. Both are electrically connected to the PLC control cabinet 61 and the PLC controls the start and stop of the pump 34 and the opening and closing of the solenoid valve 35. The return port 36 at the top of the storage tank 31 is connected to the dispensing tank 32 through another pipe 33 to form a return path for excess dry powder in the dispensing tank 32 to the storage tank 31.

[0043] In one embodiment, the weight sensor 62 inside the dispensing tank 32 monitors the weight of the dry powder inside the tank in real time and feeds it back to the PLC control cabinet 61. When the fire extinguisher is fixed below the nozzle 41 by the positioning module 50, the PLC control cabinet 61 controls the nozzle 41 to open, and the dry powder inside the dispensing tank 32 is injected into the fire extinguisher through the nozzle 41. The weight sensor 62 simultaneously monitors the weight change inside the dispensing tank 32. When the weight reduction reaches the preset single tank filling amount, the fire extinguisher has been filled to the standard weight, and the PLC control cabinet 61 immediately controls the nozzle 41 to close, completing the quantitative filling. Meanwhile, under the control of the PLC control cabinet 61, the pump 34 and solenoid valve 35 of the feeding module 30 automatically replenish dry powder from the storage tank 31 to the dispensing tank 32 according to the remaining amount in the dispensing tank 32 fed back by the weight sensor 62, ensuring the quantitative accuracy of subsequent filling; if the dispensing tank 32 is over-fed or there is remaining dry powder after filling, the excess material flows back to the storage tank 31 through the return port 36 at the top of the storage tank 31 via the pipe 33, avoiding quantitative errors caused by overfilling.

[0044] In one embodiment, firstly, the drive motor 22 drives the conveyor belt 23 to rotate horizontally along the support frame 21, synchronously conveying four fire extinguishers to be filled to a preset position directly below the nozzle 41. Since there are four dispensing tanks 32, there are corresponding placement positions for the four fire extinguishers on the conveyor belt 23. At this time, the PLC control cabinet 61 of the control module 60 receives the position sensor signal of the nozzle 41 and triggers the second hydraulic cylinder 52 of the positioning module 50 to act.

[0045] Next, the output end of the second hydraulic cylinder 52 pushes the two limiting plates 51 to rotate inward around their hinge point with the support frame 21, and they move towards the four fire extinguishers simultaneously from both sides of the conveyor belt 23. When the limiting plate 51 rotates to the clamping position, its bottom edge is embedded in the limiting groove 53 set on the support frame 21. The position of the limiting plate 51 is fixed by the physical constraint of the limiting plate 51 and the limiting groove 53. At the same time, the four fire extinguishers are clamped laterally by the limiting plates 51 on both sides, restricting their horizontal movement on the conveyor belt 23.

[0046] Ultimately, the four fire extinguishers are stably positioned directly below the nozzle 41, ensuring precise alignment between the nozzle of each fire extinguisher and the nozzle 41 of the corresponding dispensing tank 32, providing a positional basis for subsequent quantitative filling. The entire positioning process is controlled by the PLC control cabinet 61, which controls the start and stop of the drive motor 22 and the extension and retraction of the second hydraulic cylinder 52, achieving synchronous and precise positioning of the four fire extinguishers.

[0047] In one embodiment, firstly, after the fire extinguisher to be filled is fixed directly below the nozzle 41 by the positioning module 50, the PLC control cabinet 61 sends an action command to the second hydraulic cylinder 52 that drives the nozzle according to the preset fire extinguisher specifications or the height parameters input by the operator; the telescopic end of the second hydraulic cylinder 52 pushes or pulls the connecting plate 11, causing the nozzle 41 fixed on the connecting plate 11 to move up or down along the vertical direction of the bracket 10.

[0048] Meanwhile, the position sensor 63 on the nozzle 41 monitors its current height in real time and feeds the position data back to the PLC control cabinet 61; the PLC control cabinet 61 continuously compares the current height with the target height, i.e., the preset height of the fire extinguisher can opening, and dynamically adjusts the extension and retraction of the second hydraulic cylinder 52 until the height fed back by the position sensor 63 is consistent with the target height. At this time, the nozzle 41 is precisely aligned with the fire extinguisher can opening.

[0049] After height adjustment, the dry powder in the dispensing tank 32 is injected into the fire extinguisher through the nozzle 41. During the filling process, the position sensor continues to monitor the position of the nozzle 41 to ensure it remains stable at the target height and avoids misalignment caused by vibration or slight displacement of the hydraulic cylinder. After filling is completed, the PLC control cabinet 61 controls the second hydraulic cylinder 52 to retract, causing the nozzle 41 to rise and reset, making room for the delivery and positioning of the next batch of fire extinguishers.

[0050] Working principle: The fire extinguisher to be filled is placed on the conveyor belt 23 of the conveyor module 20. After the drive motor 22 starts, its output end drives the conveyor belt 23 to rotate horizontally along the support frame 21, conveying the fire extinguisher at a uniform speed to directly below the nozzle 41 of the filling execution module 40. When the fire extinguisher reaches the preset position, the PLC control cabinet 61 of the control module 60 triggers the second hydraulic cylinder 52 of the positioning module 50 to act. The output end of the second hydraulic cylinder 52 pushes the two limit plates 51 to rotate inward around their hinge point with the support frame 21, moving them from the conveyor belt 23. The fire extinguisher is clamped between both sides, and the bottom or edge of the limiting plate 51 is embedded in the limiting groove 53 on the support frame 21, stably restricting the fire extinguisher directly below the nozzle 41. Subsequently, the PLC control cabinet 61 sends a command to the hydraulic cylinder 42 that drives the nozzle according to the preset fire extinguisher specifications or the height parameters input by the operator. The extension end of the hydraulic cylinder 42 pushes or pulls the connecting plate 11, causing the nozzle 41 fixed to the connecting plate 11 to move vertically along the bracket 10. The position sensor 63 on the nozzle 41 monitors the current height in real time and feeds it back to the PLC. Control cabinet 61 operates until nozzle 41 is precisely aligned with the fire extinguisher canister opening. At this point, PLC control cabinet 61 controls the solenoid valve 35 of the feeding module 30 to open, and pump 34 to start, transporting the dry powder in storage tank 31 to dispensing tank 32 through pipeline 33. Weight sensor 62 in dispensing tank 32 monitors the amount of dry powder in real time. When the preset single-tank filling volume is reached, PLC control cabinet 61 closes solenoid valve 35 and stops pump 34. Subsequently, nozzle 41 opens, and dry powder in dispensing tank 32 is injected into the fire extinguisher. Weight sensor 62 simultaneously monitors the amount of dry powder in dispensing tank 32. When the weight reduction equals the preset filling amount, indicating that the fire extinguisher is fully filled, the PLC control cabinet 61 controls the nozzle 41 to close. If there is residual dry powder in the dispensing tank 32, and it is not completely emptied after filling, the excess dry powder flows back to the storage tank 31 through the pipe 33 and the return port 36 at the top of the storage tank 31, avoiding material waste and equipment contamination. After filling is completed, the PLC control cabinet 61 controls the second hydraulic cylinder 52 to retract, the limit plate 51 rotates to release the fire extinguisher, and the drive motor 22 restarts the conveyor belt 23 to transport the filled fire extinguisher out.

[0051] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various equivalent transformations can be made to the technical solutions of the present invention, and all such equivalent transformations fall within the protection scope of the present invention.

Claims

1. A fire extinguisher filling apparatus characterised in that: It includes a support (10), a conveying module (20), a feeding module (30), a filling execution module (40), a positioning module (50), and a control module (60); The conveying module (20) includes a support frame (21), a drive motor (22) and a conveying track (23). The conveying track (23) is mounted on the support frame (21). The output end of the drive motor (22) drives the conveying track (23) to rotate horizontally along the support frame (21). The feeding module (30) includes a storage tank (31), a dispensing tank (32), and a pipe (33). The storage tank (31) is connected to the dispensing tank (32) through the pipe (33). The filling execution module (40) includes a nozzle (41) and a hydraulic cylinder (42) for driving the nozzle (41). The nozzle (41) is located directly above the conveyor belt (23). The dispensing tank (32) is fixed to the top of the bracket (10), the bracket (10) is provided with a connecting plate (11), and the nozzle (41) is fixed to the connecting plate (11); the hydraulic cylinder (42) that drives the nozzle is fixed to the bracket (10), and its telescopic end is connected to the connecting plate (11) to drive the nozzle (41) to move vertically along the bracket (10); The positioning module (50) includes two limiting plates (51) and a second hydraulic cylinder (52) that drives the two limiting plates (51) respectively. The limiting plates (51) are all hinged to the support frame (21). The hydraulic cylinder (52) of the limiting plate (51) is fixed to the support frame (21), and its output end is connected to the top of the limiting plate (51) to drive the limiting plate (51) to rotate around the support frame (21), thereby restricting the fire extinguisher to be filled to below the nozzle (41).

2. The fire extinguisher filling apparatus of claim 1, wherein: The control module (60) includes a PLC control cabinet (61), which is electrically connected to the hydraulic cylinder (42) of the driving nozzle, the hydraulic cylinder (52) of the limiting plate, and the drive motor (22).

3. The fire extinguisher filling apparatus of claim 1, wherein: The support frame (21) is provided with a limiting groove (53) that is directly opposite to the limiting plate (51).

4. The fire extinguisher filling apparatus of claim 2, wherein: Four dispensing tanks (32) are provided, each dispensing tank (32) is equipped with a weight sensor (62), and the nozzle (41) is equipped with a position sensor (63). The weight sensor (62) and the position sensor (63) are both electrically connected to the PLC control cabinet (61).

5. The fire extinguisher filling apparatus of claim 2, wherein: The feeding module (30) also includes a pump (34) and a solenoid valve (35). The pump (34) is installed on the pipe (33) between the storage tank (31) and the dispensing tank (32). The solenoid valve (35) is installed on the pipe (33) between the pump (34) and the storage tank (31). The solenoid valve (35) is electrically connected to the PLC control cabinet (61).

6. The fire extinguisher filling apparatus of claim 5, wherein: The storage tank (31) is provided with a reflux port (36) at the top, and the dispensing tank (32) is connected to the reflux port (36) through a pipe (33).

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