Automatic winding fire reel

Abstract

The application relates to the technical field of fire-fighting reels, and discloses an automatic winding fire-fighting reel which comprises a base support, a center pipe, a reel, a control mechanism, a valve pipe and a joint. The reel is provided with a winding pipe. The control mechanism is used for controlling the winding of the winding pipe and drainage during winding. One end of the center pipe is connected with the valve pipe, and the valve pipe is provided with the joint. The automatic winding fire-fighting reel can realize automatic power winding of the reel through the servo motor. When the servo motor is disconnected with the reel, the water pipe pulling resistance of the whole is reduced, the water pipe is more smoothly pulled out, and the winding efficiency of the water pipe is improved. The rotating power of the water pipe in the winding process is utilized to form a circulating air-pumping structure, the water pipe is continuously air-pumped, the accumulated water in the water pipe is air-pressure air-pumped and automatically drained, the accumulated water in the water pipe can be effectively drained, the water pipe protection is improved, and the material hardening caused by long-time water accumulation is avoided.

Description

Technical Field

[0001] This invention relates to the field of fire hose reel technology, specifically to an automatic fire hose reel. Background Technology

[0002] Fire hose reels, typically installed in indoor fire hydrant boxes, are auxiliary firefighting facilities widely used in public areas such as offices, shopping malls, and high-rise buildings. To use them, open the extinguishing agent valve, pull the hose from the reel to the desired length, and turn on the switch at the hose head to begin firefighting operations. To retract them, rotate the reel in the opposite direction to rewind the hose back into the reel.

[0003] Currently, some fire hose reels require manual winding and unwinding during use, which is physically demanding and inefficient. Furthermore, after firefighting operations, a certain amount of water inevitably remains inside the hoses. This water is difficult to drain during winding and accumulates until the next drainage operation. Prolonged water accumulation in fire hoses increases the weight of the hose reel and can lead to mold or algae growth on the inner walls, severely damaging the hose material, making it hard, brittle, and inflexible. In sub-zero environments, the water can freeze, and the resulting ice can easily burst or block the hoses. Therefore, an automatic fire hose reel is proposed to address these issues. Summary of the Invention

[0004] Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this invention provides an automatic fire hose reel, which solves the problems of time-consuming and labor-intensive manual reel winding, as well as the inability to effectively drain water from the pipes during manual winding, leading to water accumulation and deterioration of the pipe material over time.

[0006] Technical solution

[0007] To achieve the above objectives, the present invention provides the following technical solution: an automatic fire hose reel, comprising a base support, a central tube; a reel on which a hose is wound; a control mechanism for controlling the winding of the hose and drainage during winding; a valve pipe connected to one end of the central tube, a connector provided on the valve pipe, and the water inlet end of the hose connected to the connector.

[0008] The control mechanism includes a servo motor mounted on a base bracket. The output end of the servo motor is connected to a drive gear, which meshes with a drive gear plate. A power plate is connected to the drive gear plate and is connected to the reel.

[0009] Preferably, the control mechanism further includes a sleeve, a piston is slidably connected inside the sleeve, a pull rod is rotatably connected to the piston, an eccentric column is rotatably connected to the pull rod, a rotating gear is connected to the eccentric column, a mating gear is engaged below the rotating gear, and the mating gear is connected to a drive gear.

[0010] Preferably, the piston is provided with a one-way valve, and the bottom of the sleeve is connected to an air pipe, which is connected to the central pipe.

[0011] Preferably, the drive gear disc includes a gear sleeve, the gear sleeve being provided with teeth and ratchet teeth, the teeth meshing with the drive gear, and the ratchet teeth engaging with the ratchet teeth on the mating gear disc.

[0012] Preferably, the gear sleeve is slidably connected to the power plate via a keyway, and a compression spring is abutted against the side of the gear sleeve, with one end of the compression spring abutting against the reel.

[0013] Preferably, a gap is provided between the drive gear and the power plate, and the ratchet rotates clockwise with the ratchet teeth on the mating gear plate, thereby controlling the axial movement of the teeth on the gear sleeve and disengaging from the drive gear.

[0014] Preferably, it further includes a second sleeve, a second piston slidably connected inside the second sleeve, a second pull rod connected to the second piston, one end of the second pull rod rotatably connected to an eccentric column, a connecting pipe connected to one side of the second piston, an air sleeve connected to the connecting pipe, a pressure plug slidably connected inside the air sleeve, a support rod connected to the pressure plug, the support rod passing through the air sleeve and connected to a swing frame, and the water outlet end of the coiled tube passing through the swing frame.

[0015] Preferably, the swing frame is also connected to a support rod, which is slidably connected to the base bracket. The swing frame consists of two vertical round rods, and the coiled tube is located between the two round rods.

[0016] Preferably, the base support has a pull-out port, the central tube is installed on the base support, and the water inlet of the central tube is connected to an external water source.

[0017] Beneficial effects

[0018] Compared with the prior art, the present invention provides an automatic fire hose reel with the following advantages:

[0019] 1. This automatic fire hose reel uses a servo motor to automatically wind the hose. During the process of pulling out the hose, the ratchet moves axially to disconnect the servo motor from the hose reel, reducing the overall resistance to hose pulling and making the hose pull out more smoothly. This improves the hose winding efficiency and makes it easier for operators to pull out the hose.

[0020] 2. This automatic fire hose reel uses the air pressure generated by the cyclic action to form a "circulating air pumping structure" by utilizing the rotational power of the water pipe during the rewinding process. This continuously pumps air into the rewinding water pipe, thereby pressurizing and self-draining the water inside the pipe. This ensures that the water inside the pipe can be effectively drained, thus improving the protection of the water pipe and preventing the material from hardening due to prolonged water accumulation.

[0021] 3. This automatic fire hose reel, through its pneumatic suction mechanism, ensures that the hose is not wound in one area during the winding process. Instead, it circulates and winds around the reel, ensuring a tight winding of the hose and preventing it from becoming loose after winding in one area. Attached Figure Description

[0022] Figure 1 This is a front structural diagram of an automatic fire hose reel proposed in this invention;

[0023] Figure 2 This is a schematic diagram of the back structure of an automatic fire hose reel proposed in this invention;

[0024] Figure 3 This is a schematic diagram of the cross-sectional structure of an automatic fire hose reel proposed in this invention;

[0025] Figure 4 This is a schematic diagram of the connection structure of the drive gear disc of an automatic fire hose reel proposed in this invention;

[0026] Figure 5 This is a schematic diagram of the specific structure of the drive gear disc of an automatic fire hose reel proposed in this invention;

[0027] Figure 6 This is a schematic diagram of the connection structure of the toothed disc for an automatic fire hose reel proposed in this invention;

[0028] Figure 7 This is a schematic diagram of the planar connection between the drive gear and the drive toothed disc of an automatic fire hose reel proposed in this invention.

[0029] Figure 8 This is a schematic diagram of the piston-connected structure of an automatic fire hose reel proposed in this invention.

[0030] In the diagram: 1. Base bracket; 2. Central tube; 3. Control mechanism; 301. Servo motor; 302. Power plate; 303. Drive gear; 3031. Gear; 3032. Gear sleeve; 3033. Ratchet; 3034. Compression spring; 304. Drive gear; 305. Mating gear; 306. Air pipe; 307. Sleeve 1; 308. Piston 1; 309. Pull rod 1; 310. Rotating gear; 311. Eccentric column; 312. Sleeve 2; 313. Piston 2; 314. Pull rod 2; 315. Connecting pipe; 316. Air sleeve; 317. Pressure plug; 318. Support rod; 319. Swing frame; 320. Support rod; 4. Pull pipe port; 5. Winding reel; 6. Winding pipe; 7. Valve pipe; 8. Connector. Detailed Implementation

[0031] 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.

[0032] Please see Figures 1-8 An automatic fire hose reel includes a base support 1; a central tube 2; a reel 5 with a hose 6 wound on it; a control mechanism 3 for controlling the winding of the hose 6 and drainage during winding; one end of the central tube 2 is connected to a valve pipe 7, and a connector 8 is provided on the valve pipe 7, with the water inlet end of the hose 6 connected to the connector 8.

[0033] In this embodiment, the control mechanism 3 includes a servo motor 301, which is mounted on the base bracket 1. The output end of the servo motor 301 is connected to a drive gear 304, and a drive gear 303 meshes with the drive gear 304. A power plate 302 is connected to the drive gear 303, and the power plate 302 is connected to the reel 5. In the winding state, the servo motor 301 drives the drive gear 303 to rotate through the drive gear 304. The drive gear 303 drives the power plate 302 to rotate through the keyway, thereby driving the reel 5 to rotate in the opposite direction to achieve automatic winding. When the tube 6 is manually pulled out, the reel 5 rotates in the forward direction, driving the power plate 302 and the gear sleeve 3032 to rotate synchronously. At this time, the ratchet 3033 and the ratchet teeth on the mating gear 305 form a clockwise action, causing the gear sleeve 3032 to slide axially and compress the compression spring 3034, thereby disengaging the teeth 3031 from the drive gear 304, reducing the rotational resistance of the reel 5, and ensuring smooth pulling out of the tube 6.

[0034] Furthermore, the control mechanism 3 also includes a sleeve 307, within which a piston 308 is slidably connected. A pull rod 309 is rotatably connected to the piston 308, and an eccentric column 311 is rotatably connected to the pull rod 309. A rotating gear 310 is connected to the eccentric column 311, and a meshing gear 305 meshes with the lower part of the rotating gear 310. The meshing gear 305 is connected to the drive gear 303, and the rotating gear 310 is rotatably connected to the base bracket 1. A one-way valve is provided on the piston 308, and an air pipe 306 is connected to the bottom of the sleeve 307, which communicates with the central tube 2. During the winding operation, the drive gear 303 rotates in the opposite direction, driving the meshing gear 305 to rotate synchronously through the ratchet 3033. The meshing gear 305 then drives the meshing rotating gear 310 to rotate. When the gear 310 rotates, its eccentric column 311 performs eccentric circular motion, which in turn pulls the piston 308 to reciprocate linearly within the sleeve 307 via the pull rod 309. When the piston 308 moves towards the bottom of the sleeve 307, the one-way valve on the piston 308 closes, compressing the gas inside the sleeve 307 and forcing it into the central tube 2 through the air connector 306; when the piston 308 moves in the opposite direction, the one-way valve opens, allowing external gas to enter the sleeve 307, completing the suction process. This cycle repeats, forming a "circulating air pumping structure," continuously pumping air into the central tube 2 and the connected winding tube 6 during the winding process. The air pressure then discharges the accumulated water inside the winding tube 6 from the outlet, achieving automatic drainage during the winding process.

[0035] Furthermore, the drive gear 303 includes a gear sleeve 3032, on which teeth 3031 and ratchet teeth 3033 are provided. Teeth 3031 mesh with the drive gear 304, and ratchet teeth 3033 engage with ratchet teeth on the mating gear 305. The ratchet teeth 3033 are one-way ratchet teeth, located on the other end face or outer circumference of the gear sleeve 3032, and form an engaging engagement with the ratchet teeth provided on the mating gear 305. The ratchet 3033 and the ratchet teeth on the mating gear 305 form a one-way transmission mechanism: when the drive gear 303 rotates in the reverse winding direction under the drive of the servo motor 301, the ratchet 3033 and the ratchet teeth on the mating gear 305 mesh with each other, thereby driving the mating gear 305 to rotate synchronously; when the drive gear 303 manually pulls out the winding tube 6 and rotates in the forward unwinding direction, the ratchet 3033 and the ratchet teeth on the mating gear 305 form a tooth-to-tooth relative sliding, causing the drive gear 303 to move axially and disengage from the drive gear 304, thereby cutting off the power transmission and reducing the unwinding resistance. The drive gear 303 can reliably transmit power during winding and can automatically disengage during unwinding, realizing the automatic switching of winding and unwinding actions.

[0036] Furthermore, the gear sleeve 3032 is slidably connected to the power plate 302 via a keyway. A compression spring 3034 abuts against the side of the gear sleeve 3032, and one end of the compression spring 3034 abuts against the reel 5. A gap is provided between the drive gear 304 and the power plate 302. When the ratchet 3033 rotates clockwise with the ratchet teeth on the mating gear plate 305, it controls the axial movement of the teeth 3031 on the gear sleeve 3032 and disengages from the drive gear 304. When the reel tube 6 is manually pulled out, causing the reel 5 to rotate in the forward unwinding direction, the power plate 302 drives the gear sleeve 3032 to rotate synchronously in the forward direction. At this time, the ratchet 3033 on the gear sleeve 3032 and the ratchet teeth on the mating gear plate 305 form a clockwise rotational relationship, that is, they slide relative to each other. The mating gear plate 305 generates an axial reaction force on the ratchet 3033. This force overcomes the thrust of the compression spring 3034 and pushes the gear sleeve 3032 axially along the keyway in a direction away from the drive gear 304, that is, towards the reel 5. As the gear sleeve 3032 moves axially, the teeth 3031 that were originally meshing with the drive gear 304 gradually disengage, causing the transmission connection between the drive gear plate 303 and the drive gear 304 to be disconnected. At this time, the rotation of the reel 5 and the power plate 302 is no longer subject to the resistance from the servo motor 301 side, thereby greatly reducing the operating resistance when manually pulling out the reel 6. When unwinding stops or winding begins, the servo motor 301 drives the drive gear 304 to rotate in the opposite direction. At this time, the ratchet 3033 and the ratchet teeth on the mating gear plate 305 form a reverse tooth meshing relationship. The mating gear plate 305 no longer generates axial thrust on the gear sleeve 3032. The gear sleeve 3032 automatically resets under the elastic force of the compression spring 3034, so that the teeth 3031 re-mesh with the drive gear 304, restore the power transmission path, and realize automatic winding.

[0037] In addition, it includes a second sleeve 312, a second piston 313 slidably connected inside the second sleeve 312, a second pull rod 314 connected to the second piston 313, one end of the second pull rod 314 rotatably connected to the eccentric column 311, a connecting pipe 315 connected to one side of the second piston 313, an air sleeve 316 connected to the connecting pipe 315, a pressure plug 317 slidably connected inside the air sleeve 316, a support rod 318 connected to the pressure plug 317, the support rod 318 passing through the air sleeve 316 and connected to a swing frame 319, and the water outlet end of the coil 6 passing through the swing frame 319. During the winding process, the rotating gear 310 drives the second pull rod 314 to reciprocate through the eccentric column 311, and the second pull rod 314 pulls the second piston 313 to reciprocate linearly within the second sleeve 312. When piston 313 moves in the compression direction, it forces the gas in sleeve 312 into gas sleeve 316 through connecting pipe 315. The gas pressure in gas sleeve 316 increases, pushing pressure plug 317 and its connected support rod 318 and swing frame 319 to one side. When piston 313 moves in the suction direction, the gas in gas sleeve 316 is drawn back into sleeve 312, the gas pressure decreases, and pressure plug 317 moves in the opposite direction under the action of external atmospheric pressure or the reset structure, driving swing frame 319 to move to the other side. With the continuous reciprocating motion of piston 313, swing frame 319 performs continuous left-right reciprocating lateral movement in the horizontal direction. Since the water outlet end of the hose 6 passes between the two vertical round rods of the swing frame 319, the reciprocating lateral movement of the swing frame 319 will cause the hose 6 to swing left and right along the axial direction of the reel 5 during the winding process. This ensures that the hose 6 is evenly layered on the surface of the reel 5, avoiding the problem of loose winding and uneven arrangement caused by the hose 6 being concentrated and piled up at the same cross-sectional position. At the same time, the reciprocating motion of piston 2 313 and the air pumping and drainage action of piston 1 308 are driven by the same eccentric column 311, ensuring the synchronous coordination of the drainage and uniform hose arrangement actions during the winding process.

[0038] It is worth noting that a support rod 320 is also connected to the swing frame 319. The support rod 320 is slidably connected to the base bracket 1. The swing frame 319 consists of two vertical round rods, with the coiled tube 6 positioned between the two rods. The base bracket 1 has a tube opening 4, and the central tube 2 is installed on the base bracket 1. The water inlet end of the central tube 2 is connected to an external water source. The swing frame 319 consists of two vertically arranged round rods, with a certain distance between them, forming a channel for the coiled tube 6 to pass through. The water outlet end of the coiled tube 6 passes between these two vertical round rods, so that the coiled tube 6 is constrained and guided by the swing frame 319 during the winding process. When the swing frame 319 moves back and forth under pneumatic drive, the two vertical round rods drive the outlet end of the hose 6 to swing horizontally synchronously, thereby guiding the hose 6 to be evenly arranged in the axial direction of the reel 5, achieving orderly layered winding. The hose pull port 4 is an opening structure set on the side plate or front plate of the base bracket 1, and its position corresponds to the lead-out direction of the hose 6. After the outlet end of the hose 6 is led out from the reel 5, it passes between the two round rods of the swing frame 319, and then extends to the outside of the base bracket 1 through the hose pull port 4 for the operator to pull. The edge of the hose pull port 4 can be set as rounded corners or fitted with a protective sleeve to reduce friction and wear on the surface of the hose 6. The water inlet end is used to connect to the external water source pipeline and connect to the fire water supply system. The other end of the central pipe 2 is connected to the valve pipe 7, and the valve pipe 7 is equipped with a rotatable connector 8, and the water inlet end of the hose 6 is sealed to the connector 8. When the reel 5 rotates to wind up or unwind, the connector 8 rotates synchronously with the reel 5, while the central pipe 2 remains stationary, thus achieving a dynamic water flow path connection between the fixed pipeline and the rotating reel 6. Water from an external water source flows through the central pipe 2 into the valve pipe 7, then through the connector 8 into the reel 6, and finally exits from the outlet of the reel 6 for firefighting operations.

[0039] The working principle is as follows: The entire fire hose reel operates in two stages: pulling and rewinding. During the pulling process, manual control is required to extend the hose 6 and rotate the reel 5 to unwind it. At this time, the servo motor 301 does not operate because the rotation speed of the reel 5 controlled by the motor cannot be guaranteed to match the actual pulling speed in the scenario. Therefore, this process relies on manual pulling based on the on-site environment. The operator pulls the end of the hose 6 to extend it. As the hose 6 extends, it drives the reel 5 to rotate. The reel 5 and the central tube 2 are rotatably connected, so the hose 6 drives the reel 5 to rotate and unwind. Simultaneously, the valve pipe 7 and connector 8 rotate synchronously. External water enters from one end of the central tube 2, flows into the valve pipe 7, and then, through the connection between the hose 6 and connector 8, enters the hose 6 from the connector 8. When the hose 6 is unwinding, the internal water is discharged from the outlet for firefighting operations or connected to fire extinguishing equipment. The entire process is the water hose reel operation. The winding process is driven by a servo motor 301. The fire hose reel can be powered by a built-in rechargeable battery or an external power source to control the rotation of the servo motor 301. Many existing technologies use manual winding or automatic winding with a coil spring. However, automatic winding with a coil spring generates a certain reverse pull, requiring the operator to overcome this pull during the pulling of the hose reel 6, which is very strenuous. Furthermore, prolonged pulling and winding can cause the coil spring to loosen, compromising the effective automatic winding of the hose. Therefore, this solution uses a servo motor 301 for direct electric drive and automatic winding. When the servo motor 301 rotates, it drives the drive gear 304 to rotate. The rotation of the drive gear 304, through the meshing of the gears, drives the drive gear disk 303 to rotate. The rotation of the drive gear disk 303, through the keyway connection between the gear sleeve 3032 and the power plate 302, drives the power plate 302 to rotate. The power plate 302 then drives the winding reel 5 to rotate in the opposite direction, achieving the winding action. During the unwinding phase, when the power plate 302 rotates in the forward direction, it drives the gear sleeve 3032 to rotate in the forward direction. At this time, the ratchet 3033 on the gear sleeve 3032 and the ratchet teeth on the mating gear plate 305 form a clockwise action. Therefore, the gear sleeve 3032 will slide axially on the power plate 302 and compress the compression spring 3034. When sliding axially, the teeth 3031 will disengage from the drive gear 304. Therefore, when the reel 5 is pulled to unwind, the drive gear 304 will not generate excessive resistance to the reel 5.When the reverse gear rotates, it also drives the mating gear 305 to rotate. The mating gear 305, through meshing with the rotating gear 310, drives the rotating gear 310 to rotate. The rotating gear 310, using the eccentric column 311, drives the first pull rod 309 and the second pull rod 314 to perform piston-like movements, respectively controlling the first piston 308 and the second piston 313 to perform plunger movements within the first sleeve 307 and the second sleeve 312. As the first piston 308 circulates, it continuously generates air pressure that enters the interior of the central tube 2 from the air connector 306. Because the external water source is closed during the winding action, there is no water pressure in the central tube 2, and the water inlet is closed. Air pressure enters the interior of the winding tube 6 from the central tube 2 via the connector 8. After the air pressure enters the winding tube 6, it will squeeze out the water inside the winding tube 6. As the winding action continues, the piston 308 will continuously generate airflow into the interior of the winding tube 6, thereby continuously air-filling and discharging the water inside the winding tube 6, ensuring that the water inside the winding tube 6 can be automatically discharged during the winding action. The action of piston 313 generates air pressure that enters the air jacket 316 through the connecting pipe 315, squeezing the pressure plug 317. The pressure plug 317's squeezing and sliding will drive the swing frame 319 to move laterally through the support rod 318. With the squeezing and suction actions of piston 313, the swing frame 319 will continuously move laterally left and right. At this time, the coil 6 passing through the swing frame 319 will swing left and right during the winding process, so that the coil 6 is evenly wound on the surface of the reel 5 after winding. This avoids the situation where the coil 6 becomes loose and not tightly wound after winding, which would result in the coil 6 being too loose after winding.

[0040] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

Claims

1. An automatic winding fire hose reel, characterized in that, include: Base support (1); Central tube (2); A reel (5) is provided with a winding tube (6) on the reel (5); The control mechanism (3) is used to control the winding of the hose (6) and the drainage during winding; One end of the central tube (2) is connected to a valve tube (7), and a connector (8) is provided on the valve tube (7). The water inlet end of the coiled tube (6) is connected to the connector (8). The control mechanism (3) includes a servo motor (301), which is mounted on the base bracket (1). The output end of the servo motor (301) is connected to a drive gear (304), which meshes with a drive gear (303). A power plate (302) is connected to the drive gear (303), which is connected to the reel (5). The control mechanism (3) further includes a sleeve (307), a piston (308) is slidably connected inside the sleeve (307), a pull rod (309) is rotatably connected to the piston (308), an eccentric column (311) is rotatably connected to the pull rod (309), a rotating gear (310) is connected to the eccentric column (311), a mating gear (305) meshes below the rotating gear (310), the mating gear (305) is connected to the drive gear (303), and the rotating gear (310) is rotatably connected to the base bracket (1).

2. The automatic fire hose reel according to claim 1, characterized in that: The piston (308) is equipped with a one-way valve, and the bottom of the sleeve (307) is connected to an air pipe (306), which is connected to the central pipe (2).

3. The automatic fire hose reel according to claim 1, characterized in that: The drive gear disk (303) includes a gear sleeve (3032), on which teeth (3031) and ratchet teeth (3033) are provided. The teeth (3031) mesh with the drive gear (304), and the ratchet teeth (3033) engage with the ratchet teeth on the mating gear disk (305).

4. The automatic fire hose reel according to claim 3, characterized in that: The gear sleeve (3032) is slidably connected to the power plate (302) via a keyway. A compression spring (3034) abuts against the side of the gear sleeve (3032), and one end of the compression spring (3034) abuts against the reel (5).

5. The automatic fire hose reel according to claim 4, characterized in that: A gap is provided between the drive gear (304) and the power plate (302). When the ratchet (3033) rotates with the ratchet teeth on the mating gear plate (305), the teeth (3031) on the control gear sleeve (3032) move axially and disengage from the drive gear (304).

6. The automatic fire hose reel according to claim 1, characterized in that: It also includes a second sleeve (312), a second piston (313) is slidably connected inside the second sleeve (312), a second pull rod (314) is connected to the second piston (313), one end of the second pull rod (314) is rotatably connected to the eccentric column (311), a connecting pipe (315) is connected to one side of the second piston (313), an air sleeve (316) is connected to the connecting pipe (315), a pressure plug (317) is slidably connected inside the air sleeve (316), a support rod (318) is connected to the pressure plug (317), the support rod (318) passes through the air sleeve (316) and is connected to the swing frame (319), and the water outlet end of the coil (6) passes through the swing frame (319).

7. An automatic fire hose reel according to claim 6, characterized in that: The swing frame (319) is also connected to a support rod (320), which is slidably connected to the base bracket (1). The swing frame (319) is composed of two vertical round rods, and the coil tube (6) is between the two round rods.

8. An automatic fire hose reel according to claim 7, characterized in that: The base support (1) has a pull-out port (4), the central pipe (2) is installed on the base support (1), and the water inlet of the central pipe (2) is connected to an external water source.

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