Fire-fighting lance

Abstract

The invention belongs to the technical field of fire-fighting tools, and particularly relates to a fire-fighting lance. The invention provides a fire-fighting lance, and aims to solve the problems of unreasonable structure of a channel through which water flows in the fire-fighting lance and complex structure of the fire-fighting lance in the prior art. A fire-fighting lance comprises a lance body and a control valve which is arranged in the lance body and used for controlling opening and closing of the lance, and a wrench for operating the control valve is further arranged on the lance body. An organic whole is formed through a specific waterway structure. The waterway structure is simple and direct, and smooth conveying of water flow is guaranteed; and the fire-fighting lance can meet the use requirement without an additional complex structure. Meanwhile, in the aspect of maintenance, the simple structure enables troubleshooting and maintenance to be easier.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of fire-fighting tools, and particularly relates to a fire-fighting water gun. BACKGROUND

[0002] With buildings being more and more dense and the utilization rate of fire and electricity being higher and higher, the frequency of fire caused by accidents is also higher and higher, and the harm of fire to people's personal and property safety is huge, and fire needs to be extinguished by fire-fighting equipment.

[0003] The fire-fighting water gun is one of fire-fighting equipment, and is widely used in the prior art. The fire-fighting water gun in the prior art comprises a gun body and a handle arranged on the gun body, and the handle is used to control the opening or closing of water flow. The fire-fighting water gun in the prior art has unreasonable structure, and the channel structure for water flow in the fire-fighting water gun is unreasonable, which causes the structure of the fire-fighting water gun to be very complex. SUMMARY

[0004] The present application provides a fire-fighting water gun, which aims to solve the problems of unreasonable channel structure for water flow in the fire-fighting water gun and complex structure of the fire-fighting water gun in the prior art.

[0005] In order to solve the above technical problems, the technical scheme adopted by the present application is as follows:

[0006] A fire-fighting water gun comprises a gun body and a control valve arranged in the gun body and used to control the opening and closing of the water gun, and a wrench for operating the control valve is arranged on the gun body.

[0007] The wrench comprises an opening position for enabling the water gun to be in an opening state through the control valve and a closing position for enabling the water gun to be in a closing state through the control valve.

[0008] A handle is arranged on the gun body, a water inlet for supplying water to the gun body is further arranged on the handle, the water inlet is arranged at the lower end of the handle, a water flow channel is arranged in the handle, and the water inlet is communicated with the water flow channel; the control valve comprises a valve cavity, the water flow channel is communicated with the valve cavity, a water outlet and a spray head are further arranged on the gun body, the water outlet is communicated with the valve cavity through a water outlet channel, the water outlet channel is arranged in the gun body, and the water flow entering from the water inlet flows through the water flow channel, the valve cavity, the water outlet channel, the water outlet and the spray head in sequence and is output by the spray head.

[0009] A further improved solution: A locking assembly is provided between the gun body and the wrench to keep the wrench in the open position. The locking assembly includes a locking tongue rotatably disposed on the wrench. The gun body is provided with a locking groove that cooperates with the locking tongue. When the wrench is in the open position, the locking tongue is operated to make the locking groove cooperate with the locking tongue to lock the wrench in the open position. After the locking tongue disengages from the locking groove, the wrench is in an unlocked state that can swing relative to the gun body.

[0010] Based on the above technical solution: by incorporating a locking component, firefighters can simply adjust the wrench to the open position and then securely lock it using the locking component. Once locked, the water hose will continuously and stably flow water, eliminating the need for firefighters to constantly maintain the handle in the open position. This allows firefighters to dedicate more energy and effort to observing the fire, adjusting firefighting strategies, and responding to other emergencies, significantly improving the efficiency and safety of firefighting operations. For example, in high-rise building fires, firefighters can use the self-locking function to keep the water hose in the open position and then quickly move to another location for rescue or firefighting operations without worrying about the hose accidentally shutting off. A continuous and stable water supply is crucial during firefighting. Existing fire hoses, because the handle cannot be kept open, are prone to shutting off due to accidental touches or operational errors that could cause the wrench to move. This situation, once it occurs, will severely affect the continuity and effectiveness of firefighting operations. For example, when extinguishing flammable liquid fires, a sudden interruption of the water flow could lead to the rapid spread of the fire or even cause explosions and other serious consequences. The self-locking water gun of this invention ensures the stability of the wrench in the open position through a locking assembly. Once the wrench is in the open position and locked by the locking assembly, it will not move easily unless firefighters actively operate the locking tongue to disengage it from the locking groove. This effectively prevents the water gun from shutting off due to unforeseen circumstances, ensuring a continuous water supply during firefighting. For example, in a chemical warehouse fire, a stable water flow can continuously cool flammable materials, preventing reignition and providing reliable support for firefighting efforts. Firefighters can easily engage or disengage the water gun by simply turning the locking tongue with their fingers, without complicated actions or additional tools. This simple and easy-to-understand operation is particularly important in emergency fire scenes, ensuring that firefighters can quickly lock and unlock the water gun, improving firefighting response speed. For example, in the face of a sudden small fire, firefighters can quickly adjust the water gun to the open position and lock it, then quickly extinguish the fire, preventing its spread. During firefighting, a continuous and stable water supply is crucial for ensuring effective extinguishing. This locking assembly, through the tight engagement of the locking tongue and locking groove, securely locks the wrench in the open position. Unless a firefighter actively disengages the locking tongue from the locking groove, the wrench will not move easily. This effectively prevents the water hose from shutting off due to unforeseen circumstances, ensuring a continuous water supply during firefighting.

[0011] A further improved solution: The locking groove is located on the lower side of the gun body, the gun body includes a front end and a rear end, the wrench is in the open state when the lower end of the wrench is in the position close to the rear end, the locking groove includes a front side wall that cooperates with the locking tongue to lock the wrench in the open position and a rear side wall opposite to the front side wall.

[0012] Based on the above technical solution: the locking groove is located on the lower side of the nozzle body, and the lower end of the wrench is in the open state when it is near the rear end of the nozzle body. This layout fully considers the posture of firefighters in actual firefighting operations. When using a water hose, firefighters usually carry the hose on their shoulder or hold it in front of them. The locking groove position on the lower side of the nozzle body allows their arms and fingers to be in a naturally extended state when operating the locking tongue to engage or disengage from the locking groove. For example, when a firefighter is standing on the ground and holding a water hose to extinguish a fire, when they need to lock the wrench in the open position, their fingers can naturally turn the locking tongue on the wrench downwards to engage with the locking groove on the lower side of the nozzle body, without excessive bending or stretching of the arm, reducing operational fatigue and improving operational comfort. This structural design allows firefighters to quickly complete the locking and unlocking operations of the wrench. When firefighters need to turn on and lock the water hose for continuous water spraying, they can quickly adjust the wrench to the open position near the rear end, and then quickly operate the locking tongue to engage with the front wall of the locking groove to complete the locking. When it is necessary to turn off the water gun, the latch can be quickly disengaged from the lock groove, and the wrench can be moved to the closed position.

[0013] A further improved solution: the front sidewall is set vertically, or the front sidewall is set at an angle, and the distance from the upper end of the front sidewall to the rear end is greater than the distance from the lower end of the front sidewall to the rear end.

[0014] Based on the above technical solution: when the front sidewall of the locking groove is vertically set, the contact surface between the locking tongue and the front sidewall is a plane perpendicular to the axial direction of the gun body. In the locked state, the pressure exerted by the locking tongue on the front sidewall is evenly distributed across the entire contact surface. This uniform force distribution makes the locking structure more stable and better able to withstand various external forces generated during water gun operation. For example, when the water gun sprays high-pressure water, the water flow will generate a backward reaction force on the wrench. The vertical front sidewall can evenly disperse this force, reducing local stress concentration, thereby reducing the risk of loosening or damage at the contact point between the locking tongue and the front sidewall, ensuring that the wrench remains stably locked in the open position for a long time. When the locking tongue engages with the inclined front sidewall, under the action of external forces such as the impact force of the water flow, the locking tongue will be subjected to a downward component force. This component force will make the locking tongue fit more tightly against the front sidewall. Just like a wedge embedded in an object, the more it is squeezed by external force, the deeper and more firmly it is embedded. For example, when a fire truck supplies water to a hose reel, the powerful impact of the water flow puts downward pressure on the latch, making the latch fit more tightly against the inclined front wall. This significantly enhances the lock's impact resistance and effectively prevents the wrench from accidentally unlocking under the water's force. The inclined front wall also acts as a guide. When firefighters operate the latch to engage with the lock groove, the inclined surface guides the latch smoothly into the correct locking position. Like a slide, the latch moves along the inclined front wall, allowing for a more accurate and complete fit, reducing locking failures due to inaccurate operation. This improves the accuracy and success rate of the operation, especially in emergency fire scenes, saving time and increasing firefighting efficiency.

[0015] A further improved solution: the rear sidewall is inclined, and the distance from the upper end of the rear sidewall to the rear end is greater than the distance from the lower end of the rear sidewall to the rear end.

[0016] Based on the above technical solution, the inclined rear sidewall, wider at the top and narrower at the bottom, acts like a gradually narrowing protective shield. During normal use, the latch engages with the front sidewall to lock the lever, while the inclined structure of the rear sidewall restricts the lateral movement of the latch. When the water gun is subjected to external impacts or vibrations from water flow, the latch may experience some lateral force. However, due to the restriction of the inclined rear sidewall, the latch can only move within a limited range, making it difficult to accidentally disengage from the front sidewall. If the latch slightly deviates during operation or fails to fully engage with the front sidewall for other reasons, the inclined rear sidewall acts as a guide. When firefighters attempt to relock the lever, the latch, moving along the inclined rear sidewall, is gradually guided to the correct position, accurately engaging with the front sidewall. This is similar to a guide rail, helping the latch smoothly return to the locked state, improving the reliability and success rate of the operation.

[0017] A further improved solution: An elastic element is provided between the latch and the wrench to drive the latch so that it automatically disengages from the lock groove.

[0018] Based on the above technical solution: In firefighting scenarios, time is extremely critical. When it's necessary to shut down the water hose or adjust the spray pattern, the mechanism of the elastic element automatically disengaging the locking tongue from the locking slot plays a crucial role. For example, when the fire is initially under control and firefighters need to quickly shut down the water hose to conserve water or change their firefighting strategy, the elastic element immediately releases its stored elastic potential energy, pushing the locking tongue quickly out of the locking slot. This process eliminates the need for firefighters to perform complex operations or apply significant force, greatly shortening the unlocking time and allowing firefighters to react more quickly to changes in the fire situation. The torsion spring design ensures that the locking tongue does not engage with the locking slot when no external force is applied, allowing the handle to be held and positioned in the open position by the firefighter, enabling a continuous and stable water flow from the hose. During firefighting, firefighters may need to perform prolonged spraying operations, such as covering large-area fires. This design allows firefighters to keep the handle in the open position without frequent adjustments or wrench operations, thus ensuring the continuity and stability of the water flow and improving firefighting effectiveness. For example, when fighting a large warehouse fire, firefighters can position the handle in the open position to continuously spray water at the fire source, concentrate on controlling the direction of the water jet, and more effectively control the fire.

[0019] A further improved solution: the locking tongue is rotatably connected to the wrench, the elastic element is a torsion spring, the torsion spring is sleeved on the rotating shaft, one end of the torsion spring is fixed to the locking tongue, and the other end of the torsion spring is fixed to the wrench.

[0020] Based on the above technical solution: the locking tongue is rotatably connected to the wrench via a pivot, a design that gives the locking tongue the ability to rotate freely relative to the wrench. During the operation of the fire hose, the locking tongue can rotate smoothly around the pivot. For example, when locking the wrench, the firefighter only needs to apply a certain external force to push the locking tongue, which will rotate around the pivot and engage in the locking groove. This flexible rotation method makes the cooperation between the locking tongue and the wrench more precise and efficient, avoiding problems such as jamming or operational difficulties caused by structural limitations. The pivot connection method has advantages in spatial layout. It does not require a large linear movement space between the locking tongue and the wrench; only sufficient rotational space around the pivot is needed. This makes the entire fire hose wrench locking mechanism more compact, enabling reliable functionality within a limited space. For fire hoses, which need to be used in various complex environments, the compact structure reduces the size and weight of the equipment, improving its portability and mobility, and facilitating rapid operation and use by firefighters in different scenarios. A torsion spring is fitted onto a pivot, with one end fixed to the latch and the other end fixed to a wrench. When the latch is subjected to an external force and rotates around the pivot, the torsion spring undergoes torsional deformation, storing elastic potential energy. Once the external force disappears, the torsion spring releases the stored elastic potential energy, driving the latch to automatically return to its initial position.

[0021] A further improved solution: The control valve further includes a valve core disposed within the valve cavity to control the opening and closing of the valve cavity. The wrench drives the valve core through a transmission assembly. A spring is also disposed between the valve core and the gun body to push the valve core and disconnect the valve cavity. When the wrench is in the open position, the locking tongue enters the locking groove, and the spring applies a force to the locking tongue through the valve core, the transmission assembly, and the wrench, causing the locking tongue to abut against the front side wall of the locking groove and lock the locking tongue in the locking groove.

[0022] Based on the above technical solution: by driving the valve core via a transmission assembly using a wrench, the valve core can achieve a rapid response in opening and closing the valve chamber. When a firefighter quickly operates the wrench to open the water gun, the transmission assembly immediately transmits power to the valve core, causing it to move rapidly, opening the valve chamber and allowing water to spray out quickly. Similarly, when it is necessary to close the water gun, the wrench operation can quickly close the valve chamber, cutting off the water flow. This rapid response characteristic is crucial in emergency firefighting situations, buying precious time for firefighting and effectively controlling the spread of fire. A spring between the valve core and the gun body, which pushes the valve core to disconnect the valve chamber, has an automatic reset function. When the wrench is in the non-opening position and no external force drives the valve core to open the valve chamber, the spring uses its own elasticity to push the valve core back to the disconnected position, keeping the water gun closed. This ensures that the water gun automatically closes when not in use, avoiding water waste and accidental water spray. Simultaneously, the spring also maintains the stability of the valve core when the valve chamber is disconnected, preventing accidental opening of the valve core due to water gun vibration or other external factors. When the wrench is in the open position, the latch enters the locking groove, and the spring, through the valve core, transmission assembly, and wrench, applies a force to the latch, pressing it against the front wall of the locking groove, thus locking the latch tightly within the groove. This design greatly enhances locking stability, preventing accidental unlocking of the wrench due to water gun vibration, reaction force, or other external forces during firefighting. The force applied by the spring keeps the latch firmly against the front wall of the locking groove, increasing the difficulty of unlocking and effectively preventing unlocking due to misoperation. During the operation of the water gun, firefighters may accidentally touch the wrench or other parts. Without this reliable locking mechanism, these accidental touches could cause the wrench to unlock, affecting the continuity of firefighting operations. This design, through the force of the spring, ensures that the latch will only disengage from the locking groove when the firefighter actively applies a significant external force to unlock, improving operational safety and reliability.

[0023] A further improved solution: The valve core controls the opening and closing of the valve chamber by opening or closing the water outlet channel. The cross-sectional area of ​​the valve chamber is larger than the cross-sectional area of ​​the water outlet channel. A pipe is provided inside the water outlet channel. An extension rod is provided on the valve core. When the valve core closes the water outlet channel, the extension rod is located inside the pipe.

[0024] Based on the above technical solution: when firefighters quickly operate wrenches or other control components to open the water outlet channel of the valve core, water can immediately spray out from the valve chamber through the outlet channel, quickly engaging in firefighting operations. Similarly, when it is necessary to urgently stop the water flow, the valve core can also quickly close the outlet channel, cutting off the water flow. This rapid response characteristic is crucial in emergency firefighting situations, buying precious firefighting time and effectively controlling the spread of fire. The cross-sectional area of ​​the valve chamber is larger than that of the outlet channel. According to the principles of fluid mechanics, under the same flow rate, the larger the cross-sectional area, the slower the fluid velocity and the relatively higher the pressure. When water flows from the valve chamber into the outlet channel with a smaller cross-sectional area, the flow velocity increases and the pressure decreases. This design can regulate the water pressure, ensuring that the water sprayed from the water gun has appropriate pressure and velocity. At the same time, the larger valve chamber cross-sectional area can also stabilize the water flow, reducing pressure instability caused by water flow fluctuations and ensuring the stability and uniformity of the water gun spray.

[0025] A further improved solution: The valve core is provided with a drive rod, and the transmission assembly drives the valve core through the drive rod. The transmission assembly includes a transmission rod, one end of which is rotatably connected to the drive rod, and the other end of which is rotatably connected to the wrench.

[0026] Based on the above technical solution: a drive rod is installed on the valve core, and the transmission component drives the valve core through the drive rod. This design enables precise power transmission. The drive rod, acting as a connecting bridge between the valve core and the transmission component, accurately transmits the power generated by the transmission component to the valve core. For example, when a firefighter operates a wrench, the wrench's movement is converted into a force on the drive rod through the transmission component. The drive rod then transmits this force to the valve core, causing it to open or close the water outlet channel in a predetermined manner. This precise power transmission ensures that the valve core can accurately respond to the wrench's operation, achieving precise control over water flow and interruption. The drive rod simplifies the connection structure between the valve core and the transmission component. Compared to some complex connection methods, the drive rod's structure is relatively simple, easy to manufacture and install. Furthermore, when maintenance or repair of the water gun is required, the drive rod's connection method facilitates the disassembly and replacement of related components. For example, if the valve core malfunctions and needs replacement, it can be easily removed and replaced by operating through the connection between the drive rod and the transmission component, improving maintenance efficiency and convenience.

[0027] A further improved solution: the valve core is fixed to the drive rod by threads, and the gun body is provided with a strip groove to guide the drive rod.

[0028] Based on the above technical solution: the valve core is fixed to the drive rod by threads. This connection method provides strong connection force, ensuring a tight fit between the valve core and the drive rod. During the operation of the fire hose reel, it is affected by water pressure, reaction force, and various vibrations. Threaded fixing prevents the valve core from falling off or loosening from the drive rod during movement, ensuring that the valve core can accurately follow the movement of the drive rod to open or close the water outlet channel, thereby stably controlling the flow and interruption of water flow. For example, when spraying high-pressure water, the strong water pressure will generate a large impact force on the valve core, and the threaded fixing structure can withstand this pressure, keeping the valve core in a stable position. The slotted groove on the nozzle body provides precise guidance for the drive rod. During movement, the drive rod needs to move along a specific trajectory to ensure that the valve core can accurately open or close the water outlet channel. The slotted groove restricts the direction of movement of the drive rod, allowing it to move only in a straight line along the direction of the groove, preventing the drive rod from deviating or wobbling during movement.

[0029] A further improved solution: The wrench includes an upper end and a lower end, the upper end of the wrench is rotatably connected to the gun body, and one end of the transmission rod is rotatably connected between the upper end and the lower end of the wrench.

[0030] Based on the above technical solution: the wrench consists of an upper end and a lower end, with the upper end rotatably connected to the nozzle body. This design allows the wrench to rotate flexibly around a pivot point. When operating the water hose, firefighters only need to apply a small force to the lower end of the wrench to rotate it around the pivot point at the upper end through leverage. For example, when the water hose needs to be turned on, the firefighter presses down on the lower end of the wrench. Due to the leverage effect, a small force can cause the wrench to rotate a large angle, thereby driving the transmission rod to move and opening the valve core to allow water to flow. This labor-saving design reduces the operational burden on firefighters, especially during prolonged firefighting operations, reducing physical exertion and improving operational efficiency. This rotating connection method of the wrench allows firefighters to operate it in various postures. Whether standing, squatting, or in other special postures, firefighters can easily find a suitable point of force to operate the wrench. For example, when fighting a fire in a confined space, firefighters may not be able to adopt a conventional standing posture and may need to adopt a semi-squatting or sideways posture. In this case, the rotating connection design of the wrench can ensure that firefighters can still operate the wrench flexibly and control the opening and closing of the water gun.

[0031] A further improved solution: The handle includes an operating part and a connecting part disposed on the upper end of the operating part, the connecting part being rotatably connected to the gun body, and one end of the transmission rod being rotatably connected to the connecting part.

[0032] Based on the above technical solution, the handle includes an operating section and a connecting section located at the upper end of the operating section. This design fully considers ergonomic principles. The operating section is the part that firefighters directly grip; its shape and size are designed according to the natural form of the human hand, allowing firefighters to feel comfortable while gripping it and reducing hand fatigue. The arrangement of the operating section and the connecting section achieves functional zoning. The operating section is mainly responsible for providing the grip and force application area; firefighters can control the handle by applying different forces to the operating section. The connecting section is mainly responsible for the rotational connection with the gun body, enabling the handle to rotate relative to the gun body. This clearly defined functional zoning design makes the handle's structure clearer, facilitates manufacturing and maintenance, and also improves the handle's operational reliability and stability.

[0033] A further improved solution: the locking tongue is rotatably connected to the upper end of the operating part.

[0034] Based on the above technical solution: the locking tongue is rotatably connected to the upper end of the operating part, so that the locking tongue can rotate flexibly around the connection point as the axis. The whole process is simple and quick to operate, which greatly saves time and improves the response speed in emergency fire extinguishing situations.

[0035] A further improved solution: The gun body is provided with two strip-shaped grooves, which are arranged opposite to each other on the gun body. The two ends of the drive rod extend out of the gun body through the strip-shaped grooves respectively. There are two transmission rods, which are respectively arranged at the two ends of the drive rod.

[0036] Based on the above technical solution, the strip groove provides precise guidance for the drive rod. It restricts the drive rod to move only within the path defined by the strip groove, preventing deviation or wobbling during movement. This precise guidance ensures a stable trajectory for the drive rod, thereby ensuring that components connected to it, such as the transmission rod, can accurately transmit power and motion. For example, during continuous water jetting, the drive rod moves stably along the strip groove, enabling the transmission rod to continuously and stably transmit power to the valve core, ensuring stable water jetting and improving the reliability and stability of the water gun.

[0037] A further improvement: The handle is provided with a protrusion for passing through the gaps between fingers.

[0038] Based on the above technical solution, the design of the protrusions passing through the finger gaps significantly increases the contact area and friction between the handle and the fingers. During firefighting, firefighters need to firmly grip the water gun handle to control the direction and force of the water spray. Ordinary smooth handles are prone to slipping when encountering the reaction force of the water flow or when the firefighter's body sways. Handles with protrusions that pass through the finger gaps can embed themselves into the finger gaps, changing the friction between the fingers and the handle from simple surface friction to friction with a certain embedding resistance, like adding an "anti-slip lock" between the fingers and the handle. This effectively reduces the risk of the handle slipping, allowing firefighters to hold the water gun more stably. When firefighters hold the water gun for extended periods, their fingers bear considerable pressure, easily leading to fatigue. The protrusions passing through the finger gaps can distribute the gripping pressure more evenly across all fingers and between the fingers. Compared to handles without protrusions, it avoids pressure concentrating on a single part of the fingers, such as the fingertips or finger pads. For example, when continuously spraying water for firefighting operations, the protrusions allow different parts of the fingers to share the pressure, reducing the burden on individual fingers and decreasing finger fatigue, thus ensuring that firefighters can hold the water gun stably for extended periods of time.

[0039] The beneficial effects of this invention are as follows:

[0040] This invention, by placing the water inlet at the lower end of the handle, allows water entering through the inlet to flow sequentially through the water flow channel, valve chamber, outlet channel, and outlet before being output from the nozzle. This forms a cohesive water circuit structure. The simple and direct water circuit structure ensures smooth water delivery, eliminating the need for additional complex structures to meet usage requirements. For example, it eliminates the need for complex auxiliary devices to keep the nozzle running, and avoids adding unnecessary pipes or valves to optimize the water flow path.

[0041] The simple structure of fire hoses means fewer parts are needed in the manufacturing process, and the processing technology is also relatively simple. This not only reduces raw material consumption and processing costs but also improves production efficiency. Furthermore, in terms of maintenance, the simple structure makes troubleshooting and repair easier. Maintenance personnel can quickly locate the problem and replace damaged parts more conveniently, thereby reducing maintenance costs and time.

[0042] The simple structure of a fire hose reel offers higher reliability and stability. In the fire hose reel of this invention, the water circuit structure is relatively simple, and the connections and interactions between components are also relatively straightforward, reducing performance degradation caused by component wear, loosening, or malfunction, and ensuring stable operation of the fire hose reel during firefighting. Attached Figure Description

[0043] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For users of ordinary skills in the art, other related drawings can be obtained from these drawings without creative effort.

[0044] Figure 1 This is a front view of a fire hose reel according to the present invention.

[0045] Figure 2 yes Figure 1 Sectional view at point AA.

[0046] Figure 3 This is a schematic diagram of the internal structure of a fire hose reel according to the present invention.

[0047] Figure 4 yes Figure 3 Enlarged view of section B in the middle.

[0048] Figure 5 This is a schematic diagram of a fire hose reel according to the present invention.

[0049] Explanation of the labels in the diagram:

[0050] 1-Gun body; 2-Wrench; 3-Handle; 4-Water flow channel; 5-Valve chamber; 6-Nozzle; 7-Water outlet channel; 8-Lock tongue; 9-Lock groove; 10-Front end; 11-Rear end; 12-Front side wall; 13-Rear side wall; 14-Shaft; 15-Valve core; 16-Spring; 17-Tube body; 18-Extension rod; 19-Drive rod; 20-Transmission rod; 21-Connecting part; 22-Operating part; 23-Protrusion. Detailed Implementation

[0051] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely for explaining the present invention and are not intended to limit the present invention. All other embodiments obtained by users of the art based on the embodiments of the present invention without creative effort are within the protection scope of the present invention.

[0052] refer to Figures 1 to 5 A fire hose includes a hose body 1 and a control valve disposed inside the hose body 1 to control the opening and closing of the hose. The hose body 1 is also provided with a wrench 2 for operating the control valve.

[0053] The wrench 2 includes an open position where the water gun is turned on via the control valve and a closed position where the water gun is turned off via the control valve.

[0054] The gun body 1 is provided with a handle 3, and the handle 3 is also provided with a water inlet for supplying water to the gun body 1. The water inlet is located at the lower end of the handle 3. A water flow channel 4 is provided inside the handle 3, and the water inlet communicates with the water flow channel 4. The control valve includes a valve chamber 5, and the water flow channel 4 communicates with the valve chamber 5. The gun body 1 is also provided with a water outlet and a nozzle 6. The water outlet communicates with the valve chamber 5 through a water outlet channel 7, which is located inside the gun body 1. The water entering through the water inlet flows sequentially through the water flow channel 4, the valve chamber 5, the water outlet channel 7, and the water outlet, and is output by the nozzle 6.

[0055] Specifically: A locking assembly is provided between the gun body 1 and the wrench 2 to keep the wrench 2 in the open position. The locking assembly includes a locking tongue 8 rotatably mounted on the wrench 2. The gun body 1 is provided with a locking groove 9 that cooperates with the locking tongue 8. When the wrench 2 is in the open position, operating the locking tongue 8 causes the locking groove 9 to cooperate with the locking tongue 8, locking the wrench 2 in the open position. After the locking tongue 8 disengages from the locking groove 9, the wrench 2 is in an unlocked state that can swing relative to the gun body 1. The locking groove 9 is located on the lower side of the gun body 1. The gun body 1 includes a front end 10 and a rear end 11. When the lower end of the wrench 2 is in a position close to the rear end 11, the wrench 2 is in the open state. The locking groove 9 includes a front sidewall 12 that cooperates with the locking tongue 8 to lock the wrench 2 in the open position and a rear sidewall 13 opposite to the front sidewall 12.

[0056] Wherein: the front sidewall 12 is vertically arranged, or the front sidewall 12 is inclined, and the distance from the upper end of the front sidewall 12 to the rear end 11 is greater than the distance from the lower end of the front sidewall 12 to the rear end 11. The rear sidewall 13 is inclined, and the distance from the upper end of the rear sidewall 13 to the rear end 11 is greater than the distance from the lower end of the rear sidewall 13 to the rear end 11. An elastic element is provided between the latch 8 and the wrench 2 to drive the latch 8 to automatically disengage from the locking groove 9. The latch 8 is rotatably connected to the wrench 2 through a rotating shaft 14. The elastic element is a torsion spring, which is sleeved on the rotating shaft 14. One end of the torsion spring is fixed to the latch 8, and the other end of the torsion spring is fixed to the wrench 2.

[0057] Specifically: The control valve also includes a valve core 15 disposed in the valve cavity 5 to control the opening and closing of the valve cavity 5. The wrench 2 drives the valve core 15 through a transmission assembly. A spring 16 is also disposed between the valve core 15 and the gun body 1 to push the valve core 15 to disconnect the valve cavity 5. When the wrench 2 is in the open position, the locking tongue 8 enters the locking groove 9, and the spring 16 applies a force to the locking tongue 8 through the valve core 15, the transmission assembly, and the wrench 2, causing the locking tongue 8 to abut against the front side wall 12 of the locking groove 9, thereby locking the locking tongue 8 in the locking groove 9.

[0058] Wherein: the valve core 15 controls the opening and closing of the valve chamber 5 by opening or closing the water outlet channel 7. The cross-sectional area of ​​the valve chamber 5 is larger than the cross-sectional area of ​​the water outlet channel 7. A pipe body 17 is provided inside the water outlet channel 7. An extension rod 18 is provided on the valve core 15. When the valve core 15 closes the water outlet channel 7, the extension rod 18 is located inside the pipe body 17. A drive rod 19 is provided on the valve core 15. The transmission assembly drives the valve core 15 through the drive rod 19. The transmission assembly includes a transmission rod 20. One end of the transmission rod 20 is rotatably connected to the drive rod 19, and the other end of the transmission rod 20 is rotatably connected to the wrench 2. The valve core 15 is fixed to the drive rod 19 by threads. A strip groove is provided on the gun body 1 to guide the drive rod 19. The wrench 2 includes an upper end and a lower end. The upper end of the wrench 2 is rotatably connected to the gun body 1. One end of the transmission rod 20 is rotatably connected between the upper end and the lower end of the wrench 2. The handle 3 includes an operating part 22 and a connecting part 21 disposed on the upper end of the operating part 22. The connecting part 21 is rotatably connected to the gun body 1, and one end of the transmission rod 20 is rotatably connected to the connecting part 21. The locking tongue 8 is rotatably connected to the upper end of the operating part 22. The connecting part 21 and the operating part 22 are integrally formed. The gun body 1 is provided with two strip-shaped grooves, which are disposed opposite to each other on the gun body 1. Both ends of the drive rod 19 extend out of the gun body 1 through the strip-shaped grooves. There are two transmission rods 20, which are disposed at both ends of the drive rod 19. The cross-sectional shape of the transmission rod 20 can be rectangular.

[0059] Specifically, the handle 3 is provided with a protrusion 23 for passing through the gaps between fingers. The protrusion 23 can be manufactured integrally with the main body of the handle 3. This connection method has the advantages of high structural strength and simple manufacturing process. Through processes such as injection molding or casting, the protrusion 23 and the main body of the handle 3 are manufactured in one piece, so that there is no obvious connection gap between the protrusion 23 and the handle 3, avoiding the possibility of the protrusion 23 loosening or falling off during use. For example, in the manufacturing of plastic handle 3, an injection molding process can be used to inject molten plastic into a mold, forming the main body of the handle 3 and the protrusion 23 at the same time, ensuring a tight fit between the two. The shape of the protrusion 23 should match the shape of the gaps between human fingers. The shape of the protrusion 23 can be arc-shaped or trapezoidal. The curved surface of the arc-shaped protrusion 23 can better fit the natural curvature of the gaps between fingers, making the fingers feel more comfortable when gripping, like a "groove" tailor-made for the fingers. The trapezoidal protrusion 23 has a sloping side. When fingers are inserted between the fingers, the sloping surface guides the fingers to be correctly positioned while providing resistance to enhance grip stability. For example, the upper base of the trapezoidal protrusion 23 is narrower and the lower base is wider. The fingers can easily fit into the wider lower base, while the narrower upper base prevents excessive finger slippage. To further improve the friction between the protrusion 23 and the fingers, the surface of the protrusion 23 can be specially treated. Fine textures or particles, such as knurling, can be created on the surface of the protrusion 23. These textures and particles increase the contact area and coefficient of friction between the fingers and the surface of the protrusion 23. In wet or oily environments, this surface treatment can more effectively prevent fingers from slipping, ensuring that firefighters can hold the handle 3 stably.

[0060] The working principle of this embodiment:

[0061] The water gun features a well-designed and efficient overall water flow path, ensuring a smooth flow of water from the water source to the nozzle 6 and forming a powerful jet. Water first enters through the inlet at the lower end of the handle 3, which is tightly connected to the water flow channel 4 inside the handle 3. The water flow channel 4 inside the handle 3 guides the water flow, smoothly delivering it to the valve chamber 5 of the control valve.

[0062] The control valve is the core component for controlling the water flow of the water gun, and its valve chamber 5 is connected to the water flow channel 4. When the lever 2 is in the open position, the control valve opens, allowing water to flow through the valve chamber 5. The valve chamber 5 is connected to the water outlet through the water outlet channel 7 inside the gun body 1. The water outlet channel 7 is located inside the gun body 1 and serves to further guide the water flow. Finally, the water flow is output from the water outlet through the nozzle 6, forming a water flow with a certain pressure and velocity for extinguishing fires. For example, when water enters the water flow channel 4 inside the handle 3 from the water inlet, the water flow will follow the shape and direction of the channel to avoid water flow turbulence or backflow. When passing through the valve chamber 5 of the control valve, the design of the valve chamber 5 ensures that the water flow is smooth and does not generate excessive resistance. The setting of the water outlet channel 7 further optimizes the water flow path, allowing the water to reach the nozzle 6 in the best possible condition.

[0063] Wrench 2 is a key component for operating the control valve. It is mounted on the nozzle body 1 and has two positions: open and closed. These two positions control the opening and closing of the water nozzle via the control valve. When wrench 2 is in the open position, it opens the control valve. At this time, water can flow according to the overall water flow path described above and spray out from the nozzle 6, forming the water flow required for fire extinguishing. When wrench 2 is in the closed position, it acts on the control valve again, closing it. At this time, the water flow is cut off, and the water nozzle stops discharging water.

[0064] When the wrench 2 is in the open position, firefighters can operate the locking tongue 8 to engage with the locking groove 9 on the nozzle body 1. Once the locking tongue 8 and locking groove 9 are successfully engaged, the wrench 2 is securely locked in the open position, and the water nozzle remains open. When it is necessary to turn off the water nozzle, firefighters need to disengage the locking tongue 8 from the locking groove 9. Once the locking tongue 8 and locking groove 9 are disengaged, the wrench 2 is in an unlocked state, allowing it to swing relative to the nozzle body 1. At this point, firefighters can move the wrench 2 to the closed position, thereby turning off the water nozzle. This locking assembly design ensures the stability of the wrench 2 in the open position and facilitates the firefighters' shutdown operation after use, demonstrating high practicality and reliability.

[0065] This invention is not limited to the above-mentioned optional embodiments. Under the premise of non-contradiction, the various solutions can be combined arbitrarily. Anyone can derive other forms of products under the guidance of this invention. However, no matter what changes are made in their shape or structure, all technical solutions that fall within the scope of the claims of this invention are within the protection scope of this invention.

Claims

1. A fire hose reel, characterized in that: It includes a gun body and a control valve disposed inside the gun body to control the opening and closing of the water gun, and the gun body is also provided with a wrench to operate the control valve; The wrench includes an open position where the water gun is turned on via the control valve and a closed position where the water gun is turned off via the control valve. The gun body is equipped with a handle, and the handle is also equipped with a water inlet for supplying water to the gun body. The water inlet is located at the lower end of the handle, and a water flow channel is provided inside the handle. The water inlet communicates with the water flow channel. The control valve includes a valve chamber, and the water flow channel communicates with the valve chamber. The gun body is also equipped with a water outlet and a nozzle. The water outlet communicates with the valve chamber through a water outlet channel, which is located inside the gun body. The water entering through the water inlet flows sequentially through the water flow channel, the valve chamber, the water outlet channel, and the water outlet, and is output by the nozzle.

2. A fire hose reel according to claim 1, characterized in that: A locking assembly is provided between the gun body and the wrench to keep the wrench in the open position. The locking assembly includes a locking tongue rotatably disposed on the wrench. The gun body is provided with a locking groove that cooperates with the locking tongue. When the wrench is in the open position, the locking tongue is operated to make the locking groove cooperate with the locking tongue to lock the wrench in the open position. After the locking tongue disengages from the locking groove, the wrench is in an unlocked state that can swing relative to the gun body. The locking groove is located on the lower side of the gun body. The gun body includes a front end and a rear end. When the lower end of the wrench is in a position close to the rear end, the wrench is in an open state. The locking groove includes a front side wall that cooperates with the locking tongue to lock the wrench in the open position and a rear side wall opposite to the front side wall. The front sidewall is set vertically, or the front sidewall is set at an angle, and the distance from the upper end of the front sidewall to the rear end is greater than the distance from the lower end of the front sidewall to the rear end. The rear sidewall is inclined, and the distance from the upper end of the rear sidewall to the rear end is greater than the distance from the lower end of the rear sidewall to the rear end.

3. A fire hose reel according to claim 2, characterized in that: An elastic element is provided between the latch and the wrench to drive the latch to automatically disengage from the lock groove.

4. A fire hose reel according to claim 3, characterized in that: The locking tongue is rotatably connected to the wrench via a rotating shaft. The elastic element is a torsion spring, which is sleeved on the rotating shaft. One end of the torsion spring is fixed to the locking tongue, and the other end of the torsion spring is fixed to the wrench.

5. A fire hose reel according to claim 4, characterized in that: The control valve also includes a valve core disposed in the valve cavity to control the opening and closing of the valve cavity. The wrench drives the valve core through a transmission assembly. A spring is also disposed between the valve core and the gun body to push the valve core to disconnect the valve cavity. When the wrench is in the open position, the locking tongue enters the locking groove, and the spring applies a force to the locking tongue through the valve core, the transmission assembly, and the wrench to lock the locking tongue against the front side wall of the locking groove, thereby locking the locking tongue in the locking groove. The valve core controls the opening and closing of the valve chamber by opening or closing the water outlet channel. The cross-sectional area of ​​the valve chamber is larger than the cross-sectional area of ​​the water outlet channel. A pipe is provided inside the water outlet channel. An extension rod is provided on the valve core. When the valve core closes the water outlet channel, the extension rod is located inside the pipe.

6. A fire hose reel according to claim 5, characterized in that: The valve core is provided with a drive rod, and the transmission assembly drives the valve core through the drive rod. The transmission assembly includes a transmission rod, one end of which is rotatably connected to the drive rod, and the other end of which is rotatably connected to the wrench.

7. A fire hose reel according to claim 6, characterized in that: The valve core is fixed to the drive rod by threads, and the gun body is provided with a strip groove to guide the drive rod.

8. A fire hose reel according to claim 7, characterized in that: The wrench includes an upper end and a lower end. The upper end of the wrench is rotatably connected to the gun body, and one end of the transmission rod is rotatably connected between the upper end and the lower end of the wrench. The handle includes an operating part and a connecting part disposed on the upper end of the operating part. The connecting part is rotatably connected to the gun body, and one end of the transmission rod is rotatably connected to the connecting part. The locking tongue is rotatably connected to the upper end of the operating part.

9. A fire hose reel according to claim 8, characterized in that: The gun body is provided with two strip-shaped grooves, which are arranged opposite to each other on the gun body. The two ends of the drive rod extend out of the gun body through the strip-shaped grooves. There are two transmission rods, which are respectively arranged at the two ends of the drive rod.

10. A fire hose reel according to claim 1, characterized in that: The handle is provided with protrusions for passing through the gaps between fingers.

Images