Liquid fire extinguisher inflation device

Abstract

This invention discloses a liquid fire extinguisher filling device, relating to the field of fire extinguisher filling technology. It includes a transfer frame with multiple fire extinguisher cylinders mounted on top. Each fire extinguisher cylinder has a pressing handle at its top and a filling nozzle connected to its top. The device comprises: a conveying and pressurizing mechanism for horizontally conveying multiple fire extinguisher cylinders while intermittently pressurizing and releasing the pressing handle; and a docking and expansion mechanism for intermittently controlling the docking and disengagement of the filling tube and the filling nozzle. This device can cooperate with the support frame to horizontally convey the fire extinguisher cylinders, and the pressing handle is opened by the downward movement of the pressure block. The filling tube, carrying an airbag ring, is inserted into the filling nozzle. A gas pump fills part of the fire extinguisher cylinder with gas, while another part fills the airbag ring. The airbag ring expands to seal the filling nozzle, facilitating automatic filling of multiple fire extinguisher cylinders, further improving the filling efficiency and sealing performance.

Description

Technical Field

[0001] This invention relates to the field of fire extinguisher refilling technology, specifically to a liquid fire extinguisher refilling device. Background Technology

[0002] A fire extinguisher is a portable fire-fighting tool. It contains chemicals to extinguish fires. Fire extinguishers are one of the most common fire prevention facilities and are stored in public places or places where fires may occur. Different types of fire extinguishers contain different components and are designed for different causes of fires. To ensure the effective spray distance of liquid fire extinguishers, they need to be refilled when the pressure is insufficient. Chinese patent discloses a liquid low-pressure carbon dioxide fire extinguisher inflation device (authorization announcement number CN217030798U), including a base plate, two support plates 1 and 2. Support plate 1 is fixedly connected to the base plate and support plate 2. An air pipe is fixedly connected to support plate 1. A hose is connected to the end of the air pipe. An air valve and a pressure gauge are connected to the hose. A movable block is laterally slidingly contacted on one support plate 1. A fixed block is fixedly set on the other support plate 1. Clamping blocks are set on the sides of both the movable block and the fixed block. A box is set on the side of the movable block. A spring body 1 is welded between the box and support plate 1. A round rod is set inside the box. A square block is slidably sleeved on the outside of the round rod. A spring body 2 is connected between the square block and the inner wall of the box. An extension block is connected to the side of the square block. An extension groove is opened on one support plate 1. Although this device can quickly fix and inflate a single fire extinguisher, when inflating a batch of fire extinguishers, the staff needs to repeatedly fix and disassemble the fire extinguishers one by one. The process is complicated and cumbersome, reducing the inflation efficiency of the fire extinguishers. Therefore, in view of this, the present invention proposes a liquid fire extinguisher inflation device to make up for and improve the deficiencies of the prior art. Summary of the Invention

[0003] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: A liquid fire extinguisher filling device includes a transfer frame, with multiple fire extinguisher cylinders mounted on top of the transfer frame. Each fire extinguisher cylinder has a pressing handle at its top, and a filling nozzle is connected to the top of each fire extinguisher cylinder. The device includes: The conveying and pressurizing mechanism is located between the transfer frame and the fire extinguisher cylinders. The conveying and pressurizing mechanism is used to carry multiple fire extinguisher cylinders horizontally while intermittently applying pressure and releasing the pressing handle. The inflation hose is located above the fire extinguisher bottle; The docking expansion mechanism is located between the supply frame and the conveying and pressurizing mechanism, and is used to intermittently control the docking and disconnection of the inflation pipe and the inflation nozzle.

[0004] Preferably, the conveying and pressurizing mechanism includes a first motor fixedly installed on the outer surface of the conveying frame, a rotating shaft fixedly connected to the output end of the first motor, a rotating disk fixedly connected to the outer surface of the rotating shaft, a cam fixedly connected to the outer surface of the rotating disk, and a main bevel gear fixedly connected to the end of the rotating shaft away from the first motor.

[0005] Preferably, the conveying and pressurizing mechanism further includes a rotating shaft rotatably connected to the transfer frame, a metering turntable fixedly connected to the outer surface of the rotating shaft, a sliding groove provided on the metering turntable, and a gear disk fixedly connected to the end of the rotating shaft away from the transfer frame.

[0006] Preferably, the conveying and pressurizing mechanism further includes a rack slidably connected to the transfer frame, and the rack meshes with the gear disk. A bearing seat is fixedly connected to the outer surface of the rack, and a positioning frame is fixedly connected to the top surface of the bearing seat.

[0007] Preferably, the conveying and pressurizing mechanism further includes a rotating rod rotatably connected to the transfer frame, a secondary bevel gear fixedly connected to the outer surface of the rotating rod, and the secondary bevel gear meshing and matching with the main bevel gear, and a reciprocating screw fixedly connected to the top of the rotating rod.

[0008] Preferably, the conveying and pressurizing mechanism further includes a conveying rod fixedly connected to the conveying frame, a moving block slidably connected to the outer surface of the conveying rod, and the moving block being threadedly connected to the reciprocating screw, and a pressure block being fixedly connected to the outer surface of the moving block.

[0009] Preferably, the reciprocating screw is a crescent groove / bidirectional spiral groove screw, which has a continuous closed-loop spiral groove with a reversing arc transition in the middle. The moving block, which acts as a nut, has a guide pin that is locked in the groove. When the moving block reaches the end, it automatically reverses direction along the groove. The first motor can stably drive the moving block to make linear reciprocating motion by rotating in only one direction.

[0010] Preferably, the docking expansion mechanism includes a second motor fixedly installed on the outer surface of the transfer frame, the output end of the second motor is fixedly connected to a flip shaft, the outer surface of the flip shaft is fixedly connected to a swing frame, and the transfer frame is provided with a clearance groove.

[0011] Preferably, an air pump is fixedly connected to the top of the swing frame, and the output end of the air pump is connected to the inflation pipe.

[0012] Preferably, an airbag ring is fixedly connected to the outer surface of the inflation tube, a diversion tube is connected to the airbag ring, a deflation valve is connected to the diversion tube, and the end of the diversion tube away from the airbag ring is connected to the output end of the air pump.

[0013] Compared with the prior art, the beneficial effects of the present invention are: The present invention, through the set conveying and pressurizing mechanism, can use the continuous rotation of the rotating shaft to make the rotating disk carrying the cam follow the rotation, and link the quantitative turntable carrying the gear disk to rotate intermittently, thereby making the rack carrying the carrier and the fire extinguisher bottle move horizontally, completing the intermittent horizontal conveying of multiple fire extinguisher bottles, positioning and conveying multiple fire extinguisher bottles, facilitating the batch filling of fire extinguisher bottles, and improving the batch filling efficiency of multiple fire extinguisher bottles. The present invention, through the set conveying and pressurizing mechanism, can also use the continuous rotation of the rotating shaft to make the main bevel gear and the secondary bevel gear rotate, thereby linking the rotating rod and the reciprocating screw to rotate, and in conjunction with the limiting of the moving block by the shifting rod, cause the moving block to carry the pressure block and move horizontally up and down along the reciprocating screw. That is, when the pressure block moves downward, it presses the pressing handle set on one of the fire extinguisher bottles, making it open under pressure to facilitate the filling of gas. When the pressure block moves upward, it facilitates the replacement and conveying of another fire extinguisher bottle. This is beneficial for the device to automatically press and open the pressing handle when the fire extinguisher bottle needs to be filled, and to automatically release the pressing handle after the fire extinguisher bottle is filled. This invention, through the combined use of a conveying and pressurizing mechanism and a docking and expanding mechanism, utilizes the rotation of the flipping shaft to cause the swing frame carrying the air pump and inflation tube to flip, and works in conjunction with the support seat to horizontally convey the fire extinguisher bottle. The pressure block moves down to press the handle and open the valve, allowing the inflation tube carrying the airbag ring to be inserted into the inflation nozzle. The air pump fills part of the fire extinguisher bottle with gas, while the remaining gas fills the airbag ring. The airbag ring expands to seal the inflation nozzle, facilitating automatic inflation of multiple fire extinguisher bottles, further improving inflation efficiency and enhancing the sealing performance of the fire extinguisher bottles. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of a preferred embodiment of the present invention; Figure 2 This is a schematic diagram of the swing frame facing the rotating frame flipping structure of the present invention; Figure 3 This is a cross-sectional view of the overall structure shown in this invention; Figure 4 As shown in this invention Figure 3 Enlarged structural diagram at point A; Figure 5 As shown in this invention Figure 3 Enlarged structural diagram at point B; Figure 6 This is a schematic diagram of the connection structure between the moving block and the reciprocating lead screw as shown in the present invention; Figure 7 As shown in this invention Figure 6 Enlarged structural diagram at point C; Figure 8 This is a schematic diagram of the connection structure between the bearing seat and the positioning frame shown in the present invention; Figure 9 This is a longitudinal sectional view of the overall structure shown in this invention; Figure 10 for Figure 2 Enlarged structural diagram at point D.

[0015] The numbers on the map are: 1-Transfer stand; 2-Fire extinguisher bottle; 3-Conveying and pressurizing mechanism; 4-Connecting and expanding mechanism; 5-Press handle; 6-Inflation nozzle; 7-Inflation hose; 31-First motor; 32-Rotating disk; 33-Cam; 34-Main bevel gear; 35-Quantitative turntable; 36-Sliding groove; 37-Gear disk; 38-Rotating rod; 39-Secondary bevel gear; 310-Reciprocating screw; 311-Feeding rod; 312-Moving block; 313-Rack; 314-Bearing seat; 315-Pressure block; 316-Positioning frame; 41-Second motor; 42-Tilting shaft; 43-Swing frame; 44-Air pump; 46-Airbag ring; 47-Diverter pipe; 48-Relief valve; 49-Allowing groove. Detailed Implementation

[0016] 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.

[0017] Embodiments of the present invention Please refer to Figures 1-9 As shown, a liquid fire extinguisher filling device includes a transfer frame 1, with multiple fire extinguisher cylinders 2 arranged above the transfer frame 1. Each fire extinguisher cylinder 2 has a pressing handle 5 at its top, and a filling nozzle 6 connected to the top of each fire extinguisher cylinder 2. The device includes: The conveying and pressurizing mechanism 3 is located between the transfer frame 1 and the fire extinguisher bottle 2. The conveying and pressurizing mechanism 3 is used to carry multiple fire extinguisher bottles 2 horizontally while intermittently pressurizing and releasing the pressing handle 5. The inflation pipe 7 is located above the fire extinguisher bottle 2; The docking expansion mechanism 4 is located between the supply frame 1 and the conveying and pressurizing mechanism 3, and is used to intermittently control the docking and disconnection of the inflation pipe 7 and the inflation nozzle 6. The conveying and pressurizing mechanism 3 includes a first motor 31 fixedly installed on the outer surface of the conveying frame 1. The output end of the first motor 31 is fixedly connected to a rotating shaft. The outer surface of the rotating shaft is fixedly connected to a rotating disk 32. The outer surface of the rotating disk 32 is fixedly connected to a cam 33. The end of the rotating shaft away from the first motor 31 is fixedly connected to a main bevel gear 34. The conveying and pressurizing mechanism 3 also includes a rotating shaft rotatably connected to the supply and transfer frame 1. A quantitative turntable 35 is fixedly connected to the outer surface of the rotating shaft. A sliding groove 36 is provided on the quantitative turntable 35. A gear disk 37 is fixedly connected to the end of the rotating shaft away from the supply and transfer frame 1. The conveying and pressurizing mechanism 3 also includes a rack 313 that is slidably connected to the transfer frame 1, and the rack 313 meshes with the gear disk 37. A bearing seat 314 is fixedly connected to the outer surface of the rack 313, and a positioning frame 316 is fixedly connected to the top surface of the bearing seat 314. The conveying and pressurizing mechanism 3 also includes a rotating rod 38 rotatably connected to the transfer frame 1. A secondary bevel gear 39 is fixedly connected to the outer surface of the rotating rod 38, and the secondary bevel gear 39 meshes with the main bevel gear 34. A reciprocating screw 310 is fixedly connected to the top of the rotating rod 38. The conveying and pressurizing mechanism 3 also includes a conveying rod 311 fixedly connected to the conveying frame 1. A moving block 312 is slidably connected to the outer surface of the conveying rod 311, and the moving block 312 is threadedly connected to the reciprocating screw 310. A pressure block 315 is fixedly connected to the outer surface of the moving block 312. The reciprocating screw 310 adopts the most commonly used crescent-groove bidirectional spiral groove reciprocating screw on the market. The crescent-groove bidirectional spiral groove reciprocating screw has a continuous closed-loop spiral groove with a reversing arc transition in the middle. The moving block 312, which acts as a nut, has a guide pin that is stuck in the groove. When the moving block 312 reaches the end, it will automatically reverse direction along the groove. The first motor 31 rotates in one direction and directly outputs a stable linear reciprocating motion to drive the moving block 312. This linear reciprocating linear movement mechanism has a simple structure. The first motor 31 only needs to rotate in one direction, and the movement is smooth. This is a mature existing technology, which is a unidirectional rotating reciprocating screw and nut mechanism.

[0018] Additional explanation: A shift block is fixed on the outer surface of the cam 33, and four sliding grooves 36 are equally spaced on the metering turntable 35, and the shift block can slide and adapt to any one of the sliding grooves 36. The bottom of the positioning bracket 316 is arc-shaped to prevent the fire extinguisher bottle 2 from tipping over. The top of the positioning bracket 316 is L-shaped to limit the pressing handle 5 while making the inflation nozzle 6 face the inflation tube 7. Staff can control the distance between adjacent bearing seats 314 and the length of reciprocating screw 310 through multiple tests, so that each time the reciprocating screw 310 carries the pressure block 315 to the bottom, one bearing seat 314 carries the fire extinguisher bottle 2 to directly below the pressure block 315. The transfer frame 1 is provided with a T-shaped groove, and a T-shaped slider is fixedly connected to the rack 313, and the T-shaped slider slides on the T-shaped groove; The above scheme is adopted: through the set conveying and pressurizing mechanism 3, the continuous rotation of the rotating shaft can make the rotating disk 32 carrying the cam 33 follow the rotation, and the quantitative turntable 35 carrying the gear disk 37 rotates intermittently, so that the rack 313 carrying the carrier 314 and the fire extinguisher bottle 2 can move horizontally, completing the intermittent horizontal conveying of multiple fire extinguisher bottles 2, positioning and conveying multiple fire extinguisher bottles 2, facilitating the batch filling of fire extinguisher bottles 2, and improving the batch filling efficiency of multiple fire extinguisher bottles 2; Through the set conveying and pressurizing mechanism 3, the continuous rotation of the rotating shaft can also cause the main bevel gear 34 to rotate in conjunction with the secondary bevel gear 39, thereby causing the rotating rod 38 and the reciprocating screw 310 to rotate as well. In conjunction with the limiting of the moving block 312 by the supply rod 311, the moving block 312 carries the pressure block 315 and moves horizontally up and down along the reciprocating screw 310. That is, the pressure block 315 moves downward to squeeze the pressing handle 5 set on one of the fire extinguisher bottles 2, so that it is opened by pressure to facilitate the filling of gas. When the pressure block 315 moves upward, it is convenient to replace and convey the other fire extinguisher bottle 2. This is beneficial for the device to automatically press and open the pressing handle 5 when the fire extinguisher bottle 2 needs to be filled, and to automatically release the pressing handle 5 after the fire extinguisher bottle 2 is filled.

[0019] Please refer to Figures 4-9 As shown, the docking expansion mechanism 4 includes a second motor 41 fixedly installed on the outer surface of the transfer frame 1. The output end of the second motor 41 is fixedly connected to a flip shaft 42. The outer surface of the flip shaft 42 is fixedly connected to a swing frame 43. The transfer frame 1 is provided with a clearance groove 49. An air pump 44 is fixedly connected to the top of the swing frame 43, and the output end of the air pump 44 is connected to the inflation pipe 7. An airbag ring 46 is fixedly connected to the outer surface of the inflation tube 7. A diversion tube 47 is connected to the airbag ring 46. A deflation valve 48 is connected to the diversion tube 47. The end of the diversion tube 47 away from the airbag ring 46 is connected to the output end of the air pump 44. Additional explanation: When the length of the swing frame 43 is greater than the height of the fire extinguisher bottle 2, and the swing frame 43 is perpendicular to the transfer frame 1, the inflation pipe 7 and the inflation nozzle 6 are on the same horizontal line. The length of the swing frame 43 is less than the distance between adjacent bearing seats 314; The diameter of the airbag ring 46 is larger than the diameter of the inflation tube 7, and the diameter of the airbag ring 46 is smaller than the diameter of the inflation nozzle 6. The above scheme is adopted: by using the conveying and pressurizing mechanism 3 and the docking and expansion mechanism 4 together, the rotation of the flipping shaft 42 can cause the swing frame 43 to carry the air pump 44 and the inflation tube 7 to flip, and cooperate with the support seat 314 to horizontally convey the fire extinguisher bottle 2. The pressure block 315 moves down to press the handle 5 to open, and the inflation tube 7 carrying the airbag ring 46 is inserted into the inflation nozzle 6. The air pump 44 fills part of the gas into the fire extinguisher bottle 2, while the other part of the gas fills the airbag ring 46. The airbag ring 46 expands to seal the inflation nozzle 6, which is beneficial for the device to automatically inflate multiple fire extinguisher bottles 2, further improving the inflation efficiency of the fire extinguisher bottles 2 and increasing the inflation sealing of the fire extinguisher bottles 2.

[0020] It should also be noted that: for each revolution of the rotating shaft carrying the rotating disk 32 and cam 33, the cam 33 causes the quantitative rotating disk 35 to rotate 90 degrees, which enables the gear disk 37 to move the rack 313 horizontally a certain distance. That is, at this time, the distance moved by the rack 313 is equal to half the distance between the adjacent bearing seats 314. At the same time, the main bevel gear 34 rotates in conjunction with the secondary bevel gear 39, which, together with the limiting of the moving block 312 by the shift rod 311, causes the moving block 312 to move downward carrying the pressure block 315. The pressure block 315 is brought into contact with the positioning frame 316, and the pressure block 315 applies pressure to the pressing handle 5 to open it. At this time, the flip shaft 42 rotates 90 degrees clockwise, causing the swing frame 43 to flip with the air pump 44 and the inflation tube 7, so that the inflation tube 7 with the air bag ring 46 is inserted into the inflation nozzle 6. The air pump 44 inflates the fire extinguisher bottle 2 through the inflation tube 7 until the fire extinguisher bottle 2 is fully inflated. Then, the flip shaft 42 is controlled to rotate 90 degrees counterclockwise, so that the swing frame 43 with the air pump 44 and the inflation tube 7 are reset. Once the rotating disk 32 and cam 33 have rotated one revolution, the moving block 312 moves upward with the pressure block 315, while the aforementioned support seat 314 continues to move with the fully inflated fire extinguisher bottle 2. The subsequent support seat 314 then carries a matching fire extinguisher bottle 2 to take over the position of the fully inflated fire extinguisher bottle 2. This process is repeated to complete the automatic delivery and inflation of multiple fire extinguisher bottles 2.

[0021] Working principle and usage process of this invention: Preliminary preparation: The staff placed multiple fire extinguisher bottles 2 one by one on multiple support seats 314. The bottom of the arc-shaped positioning frame 316 prevented the fire extinguisher bottles 2 from tipping over, and the top of the L-shaped positioning frame 316 limited the pressing handle 5, so that the inflation nozzles 6 on multiple fire extinguisher bottles 2 all faced the inflation tube 7. Subsequently, the operator starts the first motor 31 via the control panel. The output end of the first motor 31 is fixedly connected to the rotating shaft, the outer surface of the rotating shaft is fixedly connected to the rotating disk 32, the outer surface of the rotating disk 32 is fixedly connected to the cam 33, and the rotating shaft is rotatably connected to the supply and transfer frame 1. The outer surface of the rotating shaft is fixedly connected to the metering turntable 35, and the metering turntable 35 is provided with a sliding groove 36. The end of the rotating shaft away from the supply and transfer frame 1 is fixedly connected to the gear disk 37, and the rack 313 meshes with the gear disk 37. The outer surface of the rack 313 is fixedly connected to the bearing seat 314, and the top surface of the bearing seat 314 is fixedly connected to the positioning frame 316, which causes the rack 313 to rotate with the rotating shaft, and the bearing seat 314 is linked to horizontally transport the fire extinguisher bottle 2. Meanwhile, since the end of the rotating shaft away from the first motor 31 is fixedly connected to the main bevel gear 34, the rotating rod 38 is rotatably connected to the transfer frame 1, the outer surface of the rotating rod 38 is fixedly connected to the secondary bevel gear 39, the secondary bevel gear 39 meshes with the main bevel gear 34, the top of the rotating rod 38 is fixedly connected to the reciprocating screw 310, and the outer surface of the transfer rod 311 is slidably connected to the moving block 312, the moving block 312 is threadedly connected to the reciprocating screw 310, and the outer surface of the moving block 312 is fixedly connected to the pressure block 315, causing the moving block 312 to carry the pressure block 315 and move horizontally downward along the reciprocating screw 310, squeezing the pressing handle 5 set on one of the fire extinguisher bottles 2, so that it is opened by pressure; At this time, the operator first starts the second motor 41 through the control panel. Since the output end of the second motor 41 is fixedly connected to the flip shaft 42, the outer surface of the flip shaft 42 is fixedly connected to the swing frame 43, the top of the swing frame 43 is fixedly connected to the air pump 44, and the output end of the air pump 44 is connected to the inflation tube 7, the flip shaft 42 is rotated 90 degrees clockwise, and the air pump 44 is linked to carry the inflation tube 7 through to the inflation nozzle 6. Then, since the outer surface of the inflation tube 7 is fixedly connected to the airbag ring 46, the airbag ring 46 is connected to the diversion tube 47, the diversion tube 47 is connected to the vent valve 48, and the end of the diversion tube 47 away from the airbag ring 46 is connected to the output end of the air pump 44, the air pump 44 is controlled to exhaust gas toward the inflation tube 7 and the diversion tube 47, so that part of the gas is filled into the fire extinguisher bottle 2 through the inflation tube 7 and the inflation nozzle 6, while the other part of the gas is filled into the airbag ring 46, and the airbag ring 46 expands to seal the inflation nozzle 6. After the fire extinguisher bottle 2 is fully inflated, the personnel control the second motor 41 to start, causing the swing frame 43 to rotate 90 degrees counterclockwise, resetting the air pump 44 carrying the inflation tube 7, thereby avoiding the subsequent movement of the support seat 314. The airbag ring 46 moves with the inflation tube 7 and is compressed, causing the gas inside to be discharged through the vent valve 48 until the inflation tube 7 is detached from the inflation nozzle 6.

[0022] Summary: The designed conveying and pressurizing mechanism 3 enables the intermittent horizontal conveying of multiple fire extinguisher cylinders 2, facilitating their batch filling and improving filling efficiency. During this conveying process, the moving block 312 carries the pressure block 315, reciprocating horizontally along the reciprocating screw 310. The downward movement of the pressure block 315 presses the handle 5 on one fire extinguisher cylinder 2, opening it for easy filling. Conversely, the upward movement of the pressure block 315 facilitates the replacement conveying of another fire extinguisher cylinder 2. This allows the device to automatically press and open the handle 5 when filling is needed. After the fire extinguisher cylinder 2 is fully inflated, the pressing handle 5 is automatically released, saving personnel the trouble of manually pressing the handle 5 to open the cylinder. Through the coordinated use of the conveying and pressurizing mechanism 3 and the docking and expansion mechanism 4, the swing frame 43 carrying the air pump 44 and the inflation tube 7 are flipped. The inflation tube 7 carrying the airbag ring 46 is inserted into the inflation nozzle 6. The air pump 44 fills part of the fire extinguisher cylinder 2 with gas, while the other part fills the airbag ring 46. The airbag ring 46 expands to seal the inflation nozzle 6, which is beneficial for the device to automatically inflate multiple fire extinguisher cylinders 2. This further improves the inflation efficiency of the fire extinguisher cylinders 2 and increases the inflation sealing performance of the fire extinguisher cylinders 2.

[0023] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0024] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the invention. For example, the unidirectional reciprocating screw and nut moving mechanism can also be a screw with positive and negative thread (simple version) or a cylindrical cam type reciprocating screw.

[0025] The screw has a positive thread and a negative thread, with a transition groove in the middle. The screw rotates in one direction and the nut automatically switches the direction of movement when it reaches the dividing point.

[0026] The cylindrical cam-type reciprocating screw has a more flexible groove trajectory design, allowing for customizable reciprocating speed and dwell position, making it suitable for rhythmic reciprocating conditions.

[0027] A unidirectional reciprocating screw and nut mechanism must meet the following conditions: First, the nut must be circumferentially limited: it can only move linearly back and forth and cannot rotate with the lead screw; Second, the lead screw adopts a special reciprocating thread / closed-loop guide groove, which ordinary threaded lead screws cannot achieve unidirectional reciprocation.

[0028] Third, the guide pin / slider works with the groove to complete the reversing limit.

[0029] The scope of this invention is defined by the appended claims and their equivalents.

Claims

1. A liquid fire extinguisher filling device, comprising a transfer frame (1), a plurality of fire extinguisher bottles (2) arranged above the transfer frame (1), a pressing handle (5) provided at the top of each fire extinguisher bottle (2), and an filling nozzle (6) connected to the top of each fire extinguisher bottle (2), characterized in that, It also includes a conveying and pressurizing mechanism (3), a docking and expansion mechanism (4), and an inflation tube (7). The conveying and pressurizing mechanism (3) is located between the supply frame (1) and the fire extinguisher bottle (2). The conveying and pressurizing mechanism (3) is used to carry multiple fire extinguisher bottles (2) horizontally while intermittently pressurizing and releasing the pressing handle (5). The docking and expansion mechanism (4) is located between the supply frame (1) and the conveying and pressurizing mechanism (3). The docking and expansion mechanism (4) is used to intermittently control the docking and disengagement of the inflation tube (7) and the inflation nozzle (6). The inflation tube (7) is located above the fire extinguisher bottle (2).

2. The liquid fire extinguisher filling device according to claim 1, characterized in that, The conveying and pressurizing mechanism (3) includes a first motor (31) fixedly installed on the outer surface of the conveying frame (1). The output end of the first motor (31) is fixedly connected to a rotating shaft. The outer surface of the rotating shaft is fixedly connected to a rotating disk (32). The outer surface of the rotating disk (32) is fixedly connected to a cam (33). The end of the rotating shaft away from the first motor (31) is fixedly connected to a main bevel gear (34).

3. The liquid fire extinguisher filling device according to claim 1, characterized in that, The conveying and pressurizing mechanism (3) also includes a rotating shaft rotatably connected to the feed transfer frame (1). A quantitative turntable (35) is fixedly connected to the outer surface of the rotating shaft. A sliding groove (36) is provided on the quantitative turntable (35). A gear disk (37) is fixedly connected to the end of the rotating shaft away from the feed transfer frame (1).

4. The liquid fire extinguisher filling device according to claim 3, characterized in that, The conveying and pressurizing mechanism (3) also includes a rack (313) slidably connected to the transfer frame (1), and the rack (313) meshes with the gear disk (37). A bearing seat (314) is fixedly connected to the outer surface of the rack (313), and a positioning frame (316) is fixedly connected to the top surface of the bearing seat (314).

5. The liquid fire extinguisher filling device according to claim 2, characterized in that, The conveying and pressurizing mechanism (3) also includes a rotating rod (38) rotatably connected to the transfer frame (1). A secondary bevel gear (39) is fixedly connected to the outer surface of the rotating rod (38), and the secondary bevel gear (39) meshes with the main bevel gear (34). A reciprocating screw (310) is fixedly connected to the top of the rotating rod (38).

6. The liquid fire extinguisher filling device according to claim 5, characterized in that, The conveying and pressurizing mechanism (3) further includes a conveying rod (311) fixedly connected to the conveying frame (1). A moving block (312) is slidably connected to the outer surface of the conveying rod (311), and the moving block (312) is threadedly connected to the reciprocating screw (310). A pressure block (315) is fixedly connected to the outer surface of the moving block (312).

7. The liquid fire extinguisher filling device according to claim 6, characterized in that, The reciprocating screw (310) is a crescent groove / bidirectional spiral groove screw. The reciprocating screw (310) is provided with a continuous closed-loop spiral groove in both directions, with a reversing arc transition in the middle. The moving block (312), which serves as the nut, has a guide pin that is stuck in the groove. When the moving block (312) reaches the end, it automatically reverses direction along the groove. The first motor (31) can stably drive the moving block (312) to make linear reciprocating motion as long as it rotates in one direction.

8. The liquid fire extinguisher filling device according to claim 1, characterized in that, The docking expansion mechanism (4) includes a second motor (41) fixedly installed on the outer surface of the transfer frame (1). The output end of the second motor (41) is fixedly connected to a flip shaft (42). The outer surface of the flip shaft (42) is fixedly connected to a swing frame (43). The transfer frame (1) is provided with a clearance groove (49).

9. The liquid fire extinguisher filling device according to claim 8, characterized in that, An air pump (44) is fixedly connected to the top of the swing frame (43), and the output end of the air pump (44) is connected to the inflation pipe (7).

10. The liquid fire extinguisher filling device according to claim 9, characterized in that, An airbag ring (46) is fixedly connected to the outer surface of the inflation tube (7). A diversion tube (47) is connected to the airbag ring (46). A vent valve (48) is connected to the diversion tube (47). The end of the diversion tube (47) away from the airbag ring (46) is connected to the output end of the air pump (44).

Images