A fire-fighting lance head fixing device convenient to disassemble and assemble

Abstract

The application provides a fire-fighting lance head fixing device convenient to disassemble and assemble, and relates to the technical field of fire-fighting equipment. The device comprises a butt joint sleeve, a slidingly connected connecting ring and a fixedly connected lance head are arranged on the outer side of the butt joint sleeve, a group of stable rods in annular array are arranged on one side of the lance head, a fixedly connected butt joint ring is arranged on one side of the butt joint sleeve, and a stably connected secondary sealing ring is arranged on one side of the butt joint ring. The device has reasonable structure design, simple disassembly and assembly operation, and strong overall linkage. Through the cooperation of multiple positioning, double sealing, multi-stage locking and water flow buffering structures, the problems of complicated disassembly and assembly, unstable fixation, easy water leakage under high pressure, easy loosening at the connecting position, large use vibration and poor protection of the traditional fire-fighting lance head are effectively solved. The device has the advantages of convenient and quick disassembly and assembly, firm fixation, excellent sealing performance, long service life and adaptation to emergency fire-fighting scenes.

Description

Technical Field

[0001] This invention relates to the field of fire-fighting equipment technology, and in particular to a fire hose nozzle fixing device that is easy to assemble and disassemble. Background Technology

[0002] Fire hoses are core basic equipment in fire fighting operations. The nozzle, as a key component for spraying water, needs frequent replacement and adjustment depending on the type of fire, extinguishing distance, and spray pattern. Therefore, the ease of disassembly and assembly, the robustness of the connection, and the sealing and waterproofing performance between the nozzle and the hose body directly affect the efficiency and safety of fire fighting operations. Currently, the nozzles used in fire hoses still have the following shortcomings in terms of use and disassembly / reassembly: Currently, most traditional fire hose nozzles are fixed using a single threaded connection or a simple snap-fit ​​method. First, the threaded connection is cumbersome to install and remove. In emergency fire situations, repeated tightening and loosening is time-consuming, delaying firefighting and rescue efforts and making it difficult to quickly replace the nozzle. Second, dust and impurities easily adhere to the inside of the threads, increasing wear at the threaded connection when the nozzle is fixed. In addition, the simple snap-fit ​​fixing structure has poor limiting effect and is prone to loosening under continuous high-pressure water flow. This can lead to loosening, detachment, and water leakage, causing severe nozzle shaking. Furthermore, existing nozzle fixing devices lack multiple locking and limiting structures, relying solely on a single locking method. This results in weak vibration and impact resistance, making them prone to accidental unlocking and detachment in complex fire environments. This not only affects the stability of the high-pressure water jet but also poses safety hazards. Furthermore, the high-pressure water flow directly impacts the inside of the nozzle, causing significant vibration during operation, which increases the burden on operators and can lead to fatigue wear of components over time. At the same time, the traditional fixed structure has poor positioning and guiding effects, making it difficult to align the nozzle during installation, causing assembly jams, and resulting in low standardization when multiple people take turns operating, further reducing disassembly and assembly efficiency. Summary of the Invention

[0003] This invention relates to a fire hose nozzle fixing device that is easy to assemble and disassemble. Through the coordinated operation of various components, it achieves rapid assembly and disassembly, stable fixing and double sealing of the fire hose nozzle. The structure is reasonably designed and easy to operate. The nozzle can be locked and unlocked without special tools. The locking mechanism (200) has strong linkage, with axial locking and lateral locking working together to ensure that the nozzle is firmly fixed and prevent loosening or displacement caused by high-pressure water flow impact. The double sealing structure completely eliminates water leakage, and the buffer structure reduces the wear and tear on the nozzle caused by water flow impact. The components are accurately positioned and easy to assemble and disassemble. It is suitable for various fire-fighting operation scenarios, has strong practicality and high stability, and can greatly improve the efficiency of fire-fighting operations and reduce the operating intensity of workers.

[0004] This invention provides a fire hose nozzle fixing device that is easy to assemble and disassemble, specifically including: a docking sleeve, a slidingly connected connecting ring and a fixedly connected nozzle are installed on the outer side of the docking sleeve, a set of stabilizing rods arranged in a ring array on one side of the nozzle, a fixedly connected docking ring is provided on one side of the docking sleeve, a fixedly connected secondary sealing ring is installed on one side of the docking ring, the secondary sealing ring is located between the docking ring and the nozzle, and a fixedly connected support sleeve is provided on one side of the docking sleeve.

[0005] Furthermore, a set of annular grooves are formed on the outer side of the support sleeve, and a set of rubber rings are installed inside the annular grooves.

[0006] Furthermore, a clamping groove is provided at the end of the support sleeve. The clamping groove is annular, and the end of the clamping rod is provided with an integral clamping ring. The clamping ring and the clamping groove are aligned.

[0007] Furthermore, a fixedly connected buffer sleeve is installed on one side of the gun head. The buffer sleeve has a set of evenly distributed buffer grooves inside. The buffer sleeve is connected to the inside of the gun head. A set of clamping rods distributed in a ring array is installed at the edge of the buffer sleeve. The clamping rods extend to the outside of the support sleeve.

[0008] Furthermore, a set of guide holes arranged in a ring array are opened inside the docking ring. The guide holes are arc-shaped and correspond to the diameter of the stabilizing rod. The stabilizing rod passes through the guide holes of the docking ring. An integral first locking ring is provided on the outer side of the stabilizing rod. The diameter of the first locking ring is larger than the diameter of the stabilizing rod. The first locking ring extends to the outside of the guide holes. An installation groove corresponding to the first locking ring is opened at the end of the guide holes of the docking ring.

[0009] Furthermore, the buffer sleeve extends into the interior of the docking sleeve, and the end of the docking sleeve is provided with a set of preliminary sealing rings. A sealing groove is opened inside the preliminary sealing rings, and the cross-section of the sealing groove is a triangular structure. A filling ring is provided on the inner end face of the docking sleeve, and the filling ring corresponds to the sealing groove of the preliminary sealing ring. One side of the preliminary sealing ring and the filling ring extend into the interior of the sealing groove respectively.

[0010] Furthermore, one side of the connecting ring is provided with a set of axial locking rods arranged in a ring array. A retaining ring is provided on the outer side of the axial locking rod. A support spring is installed on the outer side of the axial locking rod. The support spring is located between the retaining ring and the docking ring. A set of locking holes corresponding to the axial locking rods are opened at the edge of the gun head.

[0011] Furthermore, a set of sliding holes corresponding to the axial locking rod are opened inside the docking ring, and the axial locking rod passes through the inside of the sliding holes.

[0012] Furthermore, a fixedly connected handle is installed at the bottom of the connecting ring. A sliding hole is opened inside the handle. The sliding hole has a cylindrical stepped structure. A slidably connected transverse locking rod is installed inside the sliding hole. The upper and lower ends of the transverse locking rod pass through the interior of the sliding hole, respectively. The transverse locking rod has a cylindrical stepped structure. A support spring is installed on the outer side of the transverse locking rod. The support spring is installed at the stepped groove position at the bottom of the transverse locking rod. A locking groove corresponding to the transverse locking rod is opened at the bottom of the mating sleeve. The upper end of the transverse locking rod extends into the interior of the locking groove.

[0013] Furthermore, a fixedly connected control frame is installed at the bottom of the transverse locking rod. The connecting ring, axial locking rod, handle, transverse locking rod, and control frame cooperate with each other to form a locking mechanism. A slot corresponding to the control frame is opened at the bottom of the handle. The upper end of the control frame extends into the inside of the slot. A set of positioning protrusions with an arc structure is provided on the upper end surface of the control frame. A set of positioning grooves corresponding to the positioning protrusions with an arc structure is opened on the bottom end surface of the handle. The positioning protrusions of the control frame and the positioning grooves of the handle correspond to each other.

[0014] Furthermore, the bottom of the docking sleeve is provided with a horizontal positioning block, and the upper end of the handle is provided with a sliding groove corresponding to the positioning block. The positioning block passes through the sliding groove of the handle and positions the handle axially.

[0015] Furthermore, a set of guide holes arranged in a ring array are opened on one side of the docking sleeve. The guide holes are arc-shaped and correspond to the clamping rod. The clamping rod passes through the interior of the guide holes. An integral second locking ring is provided on the outer side of the clamping rod. The diameter of the second locking ring is larger than the diameter of the clamping rod. The second locking ring extends to the outside of the guide holes. An installation groove corresponding to the second locking ring is opened inside the guide holes on one side of the docking sleeve.

[0016] Furthermore, the end of the secondary sealing ring is provided with a set of inclined surfaces, and the end of the secondary sealing ring is provided with a set of sealing grooves. The sealing grooves are lip-shaped sealing structures. A sealing groove is provided on the mating surface of the gun head. The sealing groove of the gun head corresponds to the sealing groove of the secondary sealing ring, and one side of the secondary sealing ring extends into the sealing groove of the gun head.

[0017] This invention provides a fire hose nozzle fixing device that is easy to assemble and disassemble, and has the following beneficial effects: This invention features a reasonable structural design, simple assembly and disassembly, and strong overall linkage. Through the coordinated use of multiple positioning, double sealing, multi-level locking, and water flow buffering structures, it effectively solves the problems of traditional fire hose nozzles, such as cumbersome assembly and disassembly, unstable fixing, easy leakage under high pressure, easy loosening at connections, large vibration during use, and poor protection. It has the advantages of easy and quick assembly and disassembly, reliable fixing, excellent sealing performance, long service life, and suitability for emergency fire-fighting scenarios. The specific beneficial effects are as follows: A docking sleeve is provided for quick docking with the nozzle head. A support sleeve is provided on one side of the docking sleeve for connecting an external water pipe. After the nozzle head is installed, it is rotated slightly to one side. At this time, the axial locking rod automatically engages with the locking hole of the nozzle head under the elastic force of the support spring, completing the axial locking of the nozzle head and the docking sleeve. At the same time, the stabilizing rod and the first locking ring laterally lock the docking position of the nozzle head and the docking sleeve, and the clamping rod and the second locking ring lock the docking position of the nozzle head and the docking sleeve a second time. After the nozzle head is installed, the initial sealing ring on one side of the buffer sleeve forms an initial sealing structure, and the secondary sealing ring provides a secondary seal for the docking position of the nozzle head and the docking sleeve. After the nozzle head is installed, the clamping ring clamps the water pipe at the clamping groove position, and the clamping rod clamps the water pipe on the outside of the support sleeve, completing the automatic clamping and fixing of the support sleeve and the water pipe.

[0018] Equipped with a buffer sleeve and buffer groove structure, it can buffer and unload the high-pressure water flow, effectively reduce the impact pressure of the water flow, reduce the shaking and vibration when the nozzle is spraying, reduce the operator's holding load, and at the same time reduce the long-term erosion and wear of the internal structure of the nozzle by the high-pressure water flow, delay the aging of components, and extend the overall service life of the nozzle.

[0019] The end of the clamping rod is also equipped with a clamping ring, and the end of the support sleeve is equipped with a clamping groove. Together with the clamping rod, clamping ring, and clamping groove, they can automatically and mechanically clamp and limit the water pipe connection, significantly improving the strength and efficiency of the water pipe connection, resisting the impact of high-pressure water flow, and ensuring stable and reliable water delivery. The device is equipped with a locking mechanism consisting of a connecting ring, axial locking rod, handle, lateral locking rod, and control frame. It relies on spring elasticity to automatically reset the lock, and unlocking and locking can be completed with simple actions such as stretching, rotating, and pushing, without the need for any special tools. The nozzle disassembly and assembly steps are simple and responsive, which can meet the emergency operation needs of quickly changing different types of nozzles at fire scenes. At the same time, the axial locking and lateral locking work together to form a double locking protection, preventing the nozzle from accidentally loosening and unlocking, and improving the safety of fire fighting operations. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments will be briefly described below.

[0021] The accompanying drawings described below are only related to some embodiments of the invention and are not intended to limit the invention.

[0022] In the attached diagram: Figure 1 A schematic diagram of the combined structure of the gun head and the fixing device of the present invention is shown; Figure 2 The present invention is shown Figure 1 A schematic diagram of the structure from an upward angle; Figure 3 A schematic diagram of the gun head structure after unlocking is shown; Figure 4 A schematic diagram of the disassembled gun head structure of the present invention is shown; Figure 5 A schematic diagram of the disassembled structure of the gun head and fixing device of the present invention is shown; Figure 6 A cross-sectional structural diagram of the gun head and fixing device of the present invention is shown; Figure 7 The present invention is shown Figure 6 Front view structural diagram; Figure 8 The present invention is shown Figure 6 A schematic diagram of the partially split structure; Figure 9 The present invention is shown Figure 6 A further breakdown of the structure; Figure 10 The present invention is shown Figure 3 A magnified structural diagram at point A; Figure 11 The present invention is shown Figure 6 A magnified structural diagram at point B; Figure 12 The present invention is shown Figure 6 A magnified structural diagram at point C; Figure 13 A schematic diagram of the docking sleeve structure of the present invention is shown.

[0023] List of reference numerals 100. Connecting sleeve; 110. Supporting sleeve; 1101. Clamping groove; 120. Connecting ring; 200. Locking mechanism; 210. Connecting ring; 220. Axial locking lever; 230. Handle; 240. Lateral locking lever; 250. Control frame; 300. Gun head; 310. Stabilizing rod; 3101. First locking ring; 320. Buffer sleeve; 330. Clamping rod; 3301. Second locking ring; 3302. Clamping ring; 340. Initial sealing ring; 400. Secondary sealing ring. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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, not all, of the embodiments of the present invention. Based on the described 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.

[0025] Example 1: Please refer to Figures 1 to 13 : This invention proposes a fire hose nozzle fixing device that is easy to assemble and disassemble, comprising: a connecting sleeve 100, a set of annular grooves opened on the outer side of a supporting sleeve 110, a set of rubber rings installed inside the annular grooves, the supporting sleeve 110 being used for connecting an external water pipe, the rubber rings enhancing the sealing performance between the supporting sleeve 110 and the external water pipe, preventing high-pressure water from leaking from the connection, while increasing the friction between the two to prevent the external water pipe from falling off, and ensuring stable water delivery during firefighting operations; In this embodiment, a slidingly connected connecting ring 210 and a fixedly connected gun head 300 are installed on the outer side of the docking sleeve 100. There is one gun head 300. A set of stabilizing rods 310 arranged in a circular array are provided on one side of the gun head 300. A fixedly connected buffer sleeve 320 is installed on one side of the gun head 300. A set of evenly distributed buffer grooves are provided inside the buffer sleeve 320. The buffer sleeve 320 and the gun head 300 are connected internally. A set of clamping rods 330 arranged in a circular array are installed at the edge of the buffer sleeve 320. The clamping rods 330 extend to the outer side of the supporting sleeve 110. The buffer grooves can accommodate the height of the gun head 300. The pressurized water flow acts as a buffer, reducing the impact of the water flow on the nozzle 300 and decreasing the frequency of water flow vibration on the nozzle 300, thus reducing the vibration burden on the user. The clamping rod 330 extends to the outside of the support sleeve 110 for easy manual operation. The clamping rod 330 clamps and fixes the support sleeve 110 to the external water pipe, and also helps to position the nozzle 300, ensuring accurate and stable docking between the nozzle 300 and the docking sleeve 100. A clamping groove 1101 is formed at the end of the support sleeve 110. The clamping groove 1101 is annular. The end of the clamping rod 330 is provided with an integral clamping ring 3302. The clamping ring 3302 and the clamping groove are connected. Alignment 1101 ensures precise engagement of the clamping ring 3302 and clamping groove 1101, further tightening and securing the connection between the support sleeve 110 and the external water pipe. This enhances the connection's strength and sealing, preventing loosening and leakage caused by high-pressure water flow. It also assists in positioning the external water pipe, ensuring accurate pipe connection and improving operational stability. The docking ring 120 contains a set of guide holes arranged in a circular array. These guide holes are arc-shaped and correspond in diameter to the stabilizing rod 310. The stabilizing rod 310 passes through the guide holes of the docking ring 120. An integral first locking ring 3101 is located on the outer side of the stabilizing rod 310. The diameter of the first locking ring 3101 is larger than the diameter of the stabilizing rod 310. The first locking ring 3101 extends to the outside of the guide hole. The end of the guide hole of the mating ring 120 is provided with a mounting groove corresponding to the first locking ring 3101. The mounting groove facilitates the installation and removal of the first locking ring 3101. The arc-shaped guide hole provides a stable sliding trajectory for the stabilizing rod 310. At the same time, the guide hole guides and positions the gun head 300 and the stabilizing rod 310 to prevent the gun head 300 from shifting. After the gun head 300 is installed, rotating the gun head 300 causes the first locking ring 3101 to engage with the guide hole to achieve the effect of quick stabilization of the gun head 300. The stabilizing rod 310 improves the structural stability of the gun head 300.The buffer sleeve 320 extends into the interior of the docking sleeve 100. A set of preliminary sealing rings 340 is provided at the end of the docking sleeve 100. A sealing groove is formed inside the preliminary sealing ring 340, with a triangular cross-section. A filling ring is provided on the inner end face of the docking sleeve 100, corresponding to the sealing groove of the preliminary sealing ring 340. One side of the preliminary sealing ring 340 and the filling ring extend into the interior of the sealing groove. The triangular sealing groove, the filling ring, and the preliminary sealing ring 340 cooperate to form a preliminary sealing structure, enhancing the sealing performance at the connection between the buffer sleeve 320 and the docking sleeve 100 and preventing high-pressure water from leaking from the gap between the buffer sleeve 320 and the docking sleeve 100. Simultaneously, the triangular structure provides good sealing stability and can withstand the impact of high-pressure water flow, further improving the sealing effect and ensuring stable water delivery during firefighting operations. In this embodiment, a set of axial locking rods 220 arranged in a circular array are provided on one side of the connecting ring 210. When the connecting ring 210 moves laterally, it drives the axial locking rods 220 to move synchronously. The connecting ring 210 connects to and positions the axial locking rods 220. A retaining ring is provided on the outer side of the axial locking rod 220. A support spring is installed on the outer side of the axial locking rod 220. The support spring is located between the retaining ring and the docking ring 120. The support spring pushes the axial locking rod 220 closer to the docking point of the gun head 300. A set of locking holes corresponding to the axial locking rods 220 are opened at the edge of the gun head 300. After the gun head 300 is installed, the gun head 300 is rotated so that the locking holes of the gun head 300 and the docking point of the gun head 300 are connected. When the axial locking rod 220 is aligned, it automatically engages with the locking hole of the nozzle 300 under the support of the spring, completing the axial quick locking of the nozzle 300's locking hole and the docking sleeve 100. Simultaneously, rotating the nozzle 300 completes the locking alignment. No special tools are required, making operation convenient and significantly improving the efficiency of nozzle 300 assembly and disassembly, adapting to emergency needs in firefighting operations. A set of sliding holes corresponding to the axial locking rod 220 are opened inside the docking ring 120. The axial locking rod 220 passes through the interior of the sliding holes, which provide sliding guidance, restricting the axial locking rod 220 to move only axially, thereby achieving the connection between the connecting ring 210 and the axial locking rod 220. The axial locking rod 220 is designed to be precisely aligned with the locking hole of the gun head 300, ensuring zero stress and improving the locking accuracy and stability of the gun head 300. A fixedly connected handle 230 is installed at the bottom of the connecting ring 210. A sliding hole with a cylindrical stepped structure is opened inside the handle 230. A slidably connected transverse locking rod 240 is installed inside the sliding hole, with its upper and lower ends passing through the sliding hole. A support spring, made of a high-strength material, is installed on the outer side of the transverse locking rod 240. The support spring is installed on the bottom step of the transverse locking rod 240. At the slot position, the support spring pushes the transverse locking rod 240 upward. A locking slot corresponding to the transverse locking rod 240 is opened at the bottom of the docking sleeve 100. The upper end of the transverse locking rod 240 extends into the interior of the locking slot. The handle 230 facilitates the operator's operation of the carrier and also facilitates the movement of the connecting ring 210 and the axial locking rod 220. The high-strength support spring ensures that the transverse locking rod 240 is stably engaged in the locking slot of the docking sleeve 100, realizing the transverse locking of the connecting ring 210 and the axial locking rod 220. In turn, it works with the axial locking rod 220 to realize the circumferential locking of the gun head 300, preventing the gun head 300 from accidentally moving and unlocking, and further improving the stability of the gun head 300 locking. In this embodiment, a fixedly connected control frame 250 is installed at the bottom of the transverse locking rod 240. Stretching the control frame 250 causes the transverse locking rod 240 to move downwards. The connecting ring 210, axial locking rod 220, handle 230, transverse locking rod 240, and control frame 250 cooperate to form a locking mechanism 200. A slot corresponding to the control frame 250 is formed at the bottom of the handle 230, and the upper end of the control frame 250 extends into the slot. The slot locks the position of the control frame 250, thus controlling the movement. The upper surface of the frame 250 is provided with a set of positioning protrusions, which are arc-shaped. The bottom surface of the handle 230 is provided with a set of positioning grooves corresponding to the positioning protrusions, which are also arc-shaped. The positioning protrusions of the control frame 250 and the positioning grooves of the handle 230 correspond to each other. After the control frame 250 is pulled downward, it is then rotated 90 degrees to complete the stable locking of the control frame 250 after being stretched, without the need for continuous holding by the operator. When the control frame 250 is released, it moves upward and returns to its original position under the support of the spring. Meanwhile, the positioning protrusion engages with the positioning groove, locking the stretched control frame 250. This makes operation easier and more convenient, facilitating simultaneous disassembly and assembly of the nozzle 300, further enhancing operational ease. The locking mechanism 200 also features strong overall linkage, enabling rapid locking and unlocking of the nozzle 300, suitable for emergency firefighting scenarios. A horizontal positioning block is located at the bottom of the docking sleeve 100, and a sliding groove corresponding to the positioning block is formed at the upper end of the handle 230. The positioning block passes through the sliding groove of the handle 230, and the positioning block aligns with the handle 230. The axial positioning of the 30-axis block allows the handle 230 to move laterally stably along the positioning block. Therefore, by moving the handle 230, the connecting ring 210 and the axial locking rod 220 can move laterally synchronously. The positioning block and the sliding groove cooperate to accurately position and guide the handle 230 axially, restricting the handle 230 to move laterally and stably only along the positioning block, preventing the handle 230 from deviating or shaking, and ensuring that the handle 230 moves synchronously and smoothly with the connecting ring 210 and the axial locking rod 220, thereby improving the smoothness and accuracy of locking and unlocking the gun head 300. In this embodiment, a set of guide holes arranged in a ring array are provided on one side of the docking sleeve 100. The guide holes have an arc structure and correspond to the clamping rod 330. The clamping rod 330 passes through the interior of the guide holes. An integral second locking ring 3301 is provided on the outer side of the clamping rod 330. The diameter of the second locking ring 3301 is larger than the diameter of the clamping rod 330. The second locking ring 3301 extends to the outside of the guide holes. An installation groove corresponding to the second locking ring 3301 is provided inside the guide hole on one side of the docking sleeve 100. The installation groove of the guide hole facilitates the installation and removal of the second locking ring 3301. The arc structure of the guide hole provides a stable sliding trajectory for the clamping rod 330. After the gun head 300 is installed, rotating the gun head 300 causes the second locking ring 3301 to cooperate with the guide hole to achieve a secondary stabilization effect of the gun head 300, further improving the structural stability of the gun head 300. A fixed docking ring 120 is provided on one side of the docking sleeve 100. A secondary sealing ring 400 with a stable connection is installed on the side. There is one secondary sealing ring 400, which is located between the docking ring 120 and the nozzle 300. A support sleeve 110 with a fixed connection is provided on one side of the docking sleeve 100. The end of the secondary sealing ring 400 has a set of inclined surfaces and a set of sealing grooves. The sealing grooves are lip-shaped sealing structures. A sealing groove is opened on the docking surface of the nozzle 300. The sealing groove of the nozzle 300 corresponds to the sealing groove of the secondary sealing ring 400. One side of the secondary sealing ring 400 extends into the sealing groove of the nozzle 300. The inclined surfaces facilitate the docking of the secondary sealing ring 400 with the sealing groove of the nozzle 300. The lip-shaped sealing structure has good sealing performance and elasticity and can tightly fit the sealing groove of the nozzle 300 to form a secondary seal. It works with the primary sealing ring 340 to achieve a double seal, completely preventing high-pressure water from leaking from the connection between the nozzle 300 and the docking ring 120, and ensuring stable water flow during fire fighting operations.

[0026] Example 2, based on Example 1, such as Figures 1-13 As shown, anti-slip textures can be added to the outside of the control frame 250 to enhance grip friction, prevent hand slippage during firefighting operations, and improve operational safety. In addition, a protective sleeve can be added to the outside of the support spring to prevent the spring from being corroded or damaged by water flow, further improving the durability of the device and adapting it to harsh firefighting operating environments.

[0027] Example 3, based on Example 1, such as Figures 1-13 As shown, the end of the axial locking rod 220 is provided with a guide chamfer, and a chamfer structure can be processed at the entrance of the locking hole of the gun head 300. An integral reinforcing rib can be added between the docking sleeve 100 and the docking ring 120.

[0028] Example 4, based on Example 1, such as Figures 1-6As shown, anti-slip textures can be added to the outer surfaces of the clamping rod 330 and the clamping ring 3302 to further enhance the stability of the support sleeve 110 and the water pipe.

[0029] Example 5, based on Example 1, such as Figures 1-10 As shown: In emergency, high-pressure, high-vibration, and rapid nozzle switching scenarios such as urban high-rise fires, underground garage fires, and initial fires in chemical plants, firefighters often need to quickly switch between different types of nozzles under conditions of slippery gloves, wearing air respirators, limited visibility, and tight time constraints to adapt to different fire extinguishing needs. In such scenarios, traditional threaded nozzles require repeated rotation, which is time-consuming, prone to stripping, and difficult to align; ordinary snap-fit ​​nozzles are prone to loosening, falling off, and leaking under high-pressure water flow, making it difficult to meet the safety and reliability requirements of high-pressure jetting and emergency rescue. This embodiment employs the fixing device of the present invention, which uses a stabilizing rod 310 for guiding and positioning, an axial locking rod 220 for automatic spring-loaded locking, a transverse locking rod 240 for preventing accidental unlocking, a double-sealed structure to prevent high-pressure water leakage, a buffer sleeve 320 for stress relief and vibration reduction, and a clamping ring 3302 for automatic clamping of the water pipe. This allows firefighters to install and automatically lock the nozzle 300 with just three simple actions: inserting, turning, and releasing, without needing to observe or use auxiliary tools, while wearing slippery protective gloves. At the same time, it achieves high-pressure water-free operation, vibration-free operation, spray-free operation, and one-button unlocking for disassembly. It fully meets the requirements of rapid, reliable, safe, and efficient use in real fire fighting and rescue operations, and has practical engineering application value and on-site promotion conditions. This device is particularly suitable for emergency fire fighting and rescue scenarios such as high-rise fires, underground spaces, and chemical zones. In actual working conditions where firefighters wear protective equipment, have limited operating space, and need to quickly switch between different types of water nozzles 300, it can achieve rapid disassembly and assembly and secure connection of nozzle 300 by relying on one-button quick lock, automatic positioning, double sealing and buffer shock absorption structure, while ensuring the safety and reliability of high-pressure spray. It not only solves the problems of cumbersome traditional threaded connections and unreliable snap-fit ​​connections, but also meets the strict requirements of fire fighting equipment for safety, stability and efficiency, and has practical promotion value in real scenarios.

[0030] The working principle of this embodiment: The steps for fixing the external water pipe are as follows: the external fire water pipe is sleeved on the outside of the support sleeve 110, and the water pipe is tightly fitted with the rubber ring on the outer side of the support sleeve 110, thus initially achieving the sealing and fixing of the water pipe and the support sleeve 110. The locking and fixing steps of the gun head 300 are as follows: the operator holds the handle 230 and manually pulls the control frame 250, which moves the horizontal locking rod 240 downward and disengages it from the locking groove at the bottom of the docking sleeve 100; the control frame 250 is rotated 90 degrees so that the positioning protrusion at the upper end of the control frame 250 is aligned with the positioning groove at the bottom of the handle 230; the control frame 250 is released, and under the action of the support spring, the positioning protrusion is engaged in the positioning groove, thus locking the control frame 250 and unlocking the connecting ring 210 and the axial locking rod 220. Next, the gun head 300 is installed. The operator holds the gun head 300 and passes the stabilizing rod 310 and the first locking ring 3101 through the guide hole of the docking ring 120. At the same time, the buffer sleeve 320 is inserted into the docking sleeve 100, and the clamping rod 330 and the first locking ring 3101 pass through the guide hole of the docking sleeve 100. Then, the operator rotates the gun head 300, and the guide hole guides the rotation of the gun head 300. At this time, under the elastic force of the support spring, the axial locking rod 220 automatically engages the locking hole of the gun head 300, completing the axial locking of the gun head 300 and the docking sleeve 100. At the same time, the stabilizing rod 310 and the first locking ring 3101 laterally lock the docking position of the gun head 300 and the docking sleeve 100, and the clamping rod 330 and the second locking ring 3301 lock the docking position of the gun head 300 and the docking sleeve 100 a second time. After the gun head 300 is installed, the initial sealing ring 340 on one side of the buffer sleeve 320 forms an initial sealing structure, and the secondary sealing ring 400 provides a secondary seal to the docking position of the gun head 300 and the docking sleeve 100. After the gun head 300 is installed, the clamping ring 3302 clamps the water pipe at the clamping groove 1101, and the clamping rod 330 clamps the water pipe on the outside of the support sleeve 110, thus completing the automatic clamping and fixing of the support sleeve 110 and the water pipe. Next, rotate the control frame 250 ninety degrees in the opposite direction to unlock the transverse locking rod 240. The transverse locking rod 240 returns to its original position under the action of the support spring and engages in the locking groove of the docking sleeve 100, thereby achieving transverse locking of the connecting ring 210. This, in turn, works with the axial locking rod 220 to complete the circumferential locking of the gun head 300, thus achieving quick and secure fixing of the gun head 300. To dismantle the nozzle 300, after the firefighting operation is completed, first shut off the water supply, then stretch the control frame 250 and rotate it 90 degrees to lock it, push the handle 230 to drive the axial locking rod 220 out of the locking hole of the nozzle 300; rotate the nozzle 300 in the opposite direction to move the first locking ring 3101 and the second locking ring 3301 to the corresponding mounting slots, pull the nozzle 300 to disengage the stabilizing rod 310 and the buffer sleeve 320 from the guide hole of the docking ring 120 and the docking sleeve 100 respectively, thus completing the dismantling of the nozzle 300; if it is necessary to dismantle the external water pipe, the external water pipe can be pulled out directly.

Claims

1. A fire hose nozzle fixing device that is easy to assemble and disassemble, characterized in that, include: A docking sleeve (100) is provided with a slidingly connected connecting ring (210) and a fixedly connected gun head (300) installed on the outer side of the docking sleeve (100). A set of stabilizing rods (310) arranged in a ring array are provided on one side of the gun head (300). A fixedly connected buffer sleeve (320) is installed on one side of the gun head (300). A fixedly connected docking ring (120) is provided on one side of the docking sleeve (100). A fixedly connected secondary sealing ring (400) is installed on one side of the docking ring (120). The secondary sealing ring (400) is located between the docking ring (120) and the gun head (300). A fixedly connected support sleeve (110) is provided on one side of the docking sleeve (100).

2. The fire hose nozzle fixing device for easy assembly and disassembly according to claim 1, characterized in that, The buffer sleeve (320) has a set of evenly distributed buffer grooves inside. The buffer sleeve (320) and the gun head (300) are connected inside. A set of clamping rods (330) arranged in a ring array are installed at the edge of the buffer sleeve (320). The clamping rods (330) extend to the outside of the support sleeve (110).

3. The fire hose nozzle fixing device for easy assembly and disassembly according to claim 1, characterized in that, A set of annular grooves are opened on the outer side of the support sleeve (110), and a set of rubber rings are installed inside the annular grooves; a pressing groove (1101) is opened at the end of the support sleeve (110), and a pressing ring (3302) with an integral structure is provided at the end of the pressing rod (330), and the pressing ring (3302) and the pressing groove (1101) are aligned.

4. A fire hose nozzle fixing device that is easy to assemble and disassemble according to claim 1, characterized in that, The docking ring (120) has a set of guide holes arranged in a ring array inside. The diameter of the guide holes corresponds to that of the stabilizing rod (310). The stabilizing rod (310) passes through the guide holes of the docking ring (120). The outer side of the stabilizing rod (310) is provided with an integral first locking ring (3101). The diameter of the first locking ring (3101) is larger than that of the stabilizing rod (310). The first locking ring (3101) extends to the outside of the guide holes. The end of the guide hole of the docking ring (120) is provided with an installation groove corresponding to the first locking ring (3101).

5. A fire hose nozzle fixing device for easy assembly and disassembly according to claim 1, characterized in that, The buffer sleeve (320) extends into the interior of the docking sleeve (100). The end of the docking sleeve (100) is provided with a set of preliminary sealing rings (340). A sealing groove is opened inside the preliminary sealing rings (340). A filling ring is provided on the inner end face of the docking sleeve (100). The filling ring and the sealing groove of the preliminary sealing ring (340) correspond to each other. One side of the preliminary sealing ring (340) and the filling ring extend into the interior of the sealing groove respectively.

6. A fire hose nozzle fixing device that is easy to assemble and disassemble according to claim 1, characterized in that, A set of axial locking rods (220) arranged in a ring array are provided on one side of the connecting ring (210). A retaining ring is provided on the outer side of the axial locking rod (220). A support spring is installed on the outer side of the axial locking rod (220). The support spring is located between the retaining ring and the docking ring (120). A set of locking holes corresponding to the axial locking rods (220) are opened at the edge of the gun head (300). A set of sliding holes corresponding to the axial locking rods (220) are opened inside the docking ring (120). The axial locking rods (220) pass through the inside of the sliding holes.

7. A fire hose nozzle fixing device that is easy to assemble and disassemble according to claim 1, characterized in that, A fixedly connected handle (230) is installed at the bottom of the connecting ring (210). A sliding hole is opened inside the handle (230). The sliding hole has a cylindrical stepped structure. A slidably connected transverse locking rod (240) is installed inside the sliding hole. The upper and lower ends of the transverse locking rod (240) pass through the interior of the sliding hole respectively. A support spring is installed on the outer side of the transverse locking rod (240). The support spring is installed at the stepped groove position at the bottom of the transverse locking rod (240). A locking groove corresponding to the transverse locking rod (240) is opened at the bottom of the mating sleeve (100). The upper end of the transverse locking rod (240) extends into the interior of the locking groove.

8. A fire hose nozzle fixing device for easy assembly and disassembly according to claim 7, characterized in that, A fixedly connected control frame (250) is installed at the bottom of the transverse locking rod (240). The connecting ring (210), axial locking rod (220), handle (230), transverse locking rod (240), and control frame (250) cooperate to form a locking mechanism (200). A slot corresponding to the control frame (250) is opened at the bottom of the handle (230). The upper end of the control frame (250) extends into the slot. A set of positioning protrusions is provided on the upper end face of the control frame (250). A set of positioning grooves corresponding to the positioning protrusions is opened on the bottom end face of the handle (230). The positioning protrusions of the control frame (250) correspond to the positioning grooves of the handle (230). A transverse positioning block is provided at the bottom of the docking sleeve (100). A sliding groove corresponding to the positioning block is opened at the upper end of the handle (230). The positioning block passes through the sliding groove of the handle (230) and positions the handle (230) axially.

9. A fire hose nozzle fixing device that is easy to assemble and disassemble according to claim 1, characterized in that, A set of guide holes arranged in a ring array are opened on one side of the docking sleeve (100). The guide holes are arc structures and correspond to the clamping rod (330). The clamping rod (330) passes through the interior of the guide holes. A second locking ring (3301) with an integral structure is provided on the outer side of the clamping rod (330). The diameter of the second locking ring (3301) is larger than the diameter of the clamping rod (330). The second locking ring (3301) extends to the outside of the guide holes. An installation groove corresponding to the second locking ring (3301) is opened inside the guide hole on one side of the docking sleeve (100).

10. A fire hose nozzle fixing device that is easy to assemble and disassemble according to claim 1, characterized in that, The end of the secondary sealing ring (400) is provided with a set of inclined surfaces, and a set of sealing grooves are opened at the end of the secondary sealing ring (400). A sealing groove is opened on the mating surface of the gun head (300). The sealing groove of the gun head (300) corresponds to the sealing groove of the secondary sealing ring (400). One side of the secondary sealing ring (400) extends into the sealing groove of the gun head (300).

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