Multi-agent combination lifting boom and fire truck

Abstract

The utility model relates to fire fighting equipment technical field especially, more dose combined lifting arm support and fire engine, the utility model provides a more dose combined lifting arm support, including support platform, lifting arm, fire monitor and dry powder pipeline, one end of lifting arm is movably connected with support platform, and the inside of lifting arm is provided with conveying passage, fire monitor sets up at the one end of lifting arm far from support platform, and communicates with conveying passage, dry powder pipeline includes: first pipeline, arranges in conveying passage, second pipeline, second pipeline penetrates the side wall of lifting arm adjacent to the one end of fire monitor, one end of second pipeline communicates with first pipeline, and the other end communicates with fire monitor, the utility model provides a more dose combined lifting arm support simple structure, improves the protection to dry powder pipeline, avoids the eccentric load effect of dry powder pipeline outside effectively simultaneously.

Description

Technical Field

[0001] This utility model relates to the field of fire-fighting equipment technology, and in particular to a multi-agent lifting boom and fire truck. Background Technology

[0002] With the increasing trend of modern buildings towards high-rise and large-scale structures, and the widespread use of flammable and explosive materials in industrial production, the complexity and danger of fire accidents are constantly increasing. Traditional single-agent extinguishing agents are often insufficient to meet the needs of extinguishing complex fires, leading to the emergence of multi-agent fire suppression technologies. Multi-agent fire suppression systems can simultaneously use water-based extinguishing agents (such as foam mixtures) and dry powder extinguishing agents. Through the synergistic effect of the two agents, they achieve rapid fire suppression and effective prevention of reignition, making them particularly suitable for complex fire scenarios such as petrochemical plants, large warehouses, and high-rise buildings.

[0003] Currently, multi-agent fire trucks typically employ lifting booms to achieve remote spraying operations, protecting firefighters and expanding the operational range. Existing multi-agent lifting booms generally include basic components such as a support platform, a lifting boom, and a fire monitor. The support platform supports the entire boom system, the lifting boom adjusts the spray angle and height via a luffing mechanism, and the fire monitor serves as the final actuator to spray the extinguishing agent.

[0004] In existing technologies, dry powder delivery pipelines are externally mounted, either fixed to the outer surface of the lifting arm or arranged outside the lifting arm via a support system. Externally mounted pipelines generate an off-center load effect during the lifting arm's luffing and telescopic movements. Because the weight of the dry powder pipeline and its support system deviates from the lifting arm's central axis, additional unbalanced torque is generated during boom movement, affecting the lifting arm's motion accuracy and stability, increasing the load on the drive system, and potentially leading to structural fatigue and decreased control precision. Secondly, externally mounted pipelines are susceptible to adverse effects from external environmental factors. In firefighting operations, lifting arms need to operate in harsh environments such as high temperatures, dense smoke, and strong winds. Externally mounted dry powder pipelines are directly exposed to these harsh conditions, making them vulnerable to heat radiation, corrosive gases, and mechanical impacts, leading to accelerated pipeline aging, decreased sealing performance, and even ruptures and leaks. Utility Model Content

[0005] This utility model provides a multi-agent lifting boom and fire truck. The multi-agent lifting boom has a simple structure, improves the protection of dry powder pipelines, and effectively avoids the off-center load effect of externally located dry powder pipelines.

[0006] This utility model provides a multi-agent combined lifting boom, including: a support platform; a lifting boom, one end of which is movably connected to the support platform, and a conveying channel is provided inside the lifting boom; a fire monitor, which is located at the end of the lifting boom away from the support platform and is connected to the conveying channel; and a dry powder pipeline, which includes: a first pipeline arranged in the conveying channel; and a second pipeline that penetrates the side wall of the lifting boom near the fire monitor, one end of which is connected to the first pipeline and the other end of which is connected to the fire monitor.

[0007] In one possible implementation, the first conduit is coaxially arranged with the delivery channel.

[0008] In one possible implementation, the length of the first pipeline is less than or equal to the length of the delivery channel.

[0009] In one possible implementation, the second conduit is a flexible pipe; the fire monitor includes: an adjustment mechanism connected to the lifting arm; and a nozzle disposed at the movable end of the adjustment mechanism; wherein the adjustment mechanism is used to adjust the spray angle of the nozzle.

[0010] In one possible implementation, a support member is also included, which is disposed within the delivery channel to support the first pipeline.

[0011] In one possible implementation, the support member is provided with a connecting port along the extension direction of the conveying channel, the connecting port being used to connect the spaces on both sides of the support member.

[0012] In one possible implementation, multiple support members are spaced apart along the extension direction of the conveying channel.

[0013] In one possible implementation, a power unit is also included, with its fixed end connected to the support platform and its movable end connected to the lifting arm for adjusting the height of the lifting arm.

[0014] In one possible implementation, a rotary joint is also included, which is rotatably connected to the lifting arm and communicates with the conveying channel.

[0015] In one possible implementation, the lifting arm is a telescopic boom, and the first pipeline is a telescopic pipeline.

[0016] In one possible implementation, the lifting arm is made of aluminum alloy.

[0017] Secondly, this utility model provides a fire truck, including: a vehicle body; and the aforementioned multi-agent lifting boom.

[0018] This utility model provides a multi-agent lifting boom that, through a redesigned internal structural layout, enables the lifting boom to serve both structural support and dual media delivery functions. Ingenious space utilization achieves an organic unity of pipeline protection and functional integration. Specifically, the support platform provides a stable installation foundation for the entire lifting boom. One end of the lifting boom is movably connected to the support platform to form a luffing mechanism. The internal delivery channel of the lifting boom provides a dedicated path for the delivery of the mixed liquid. The fire monitor is located at the end of the lifting boom furthest from the support platform and is connected to the delivery channel, ensuring the mixed liquid can smoothly reach the spray position. The dry powder pipeline adopts a segmented design: the first pipeline is entirely arranged inside the delivery channel, utilizing the lifting boom's protective structure to achieve safe dry powder delivery; the second pipeline penetrates the side wall of the lifting boom near the fire monitor, reliably connecting the internal first pipeline to the external fire monitor, forming a complete dry powder delivery link. When the fire truck is conducting firefighting operations in complex environments, the built-in first pipeline is fully protected by the lifting boom structure, preventing direct impact from external high temperatures, corrosive gases, or mechanical shocks, ensuring the reliability and service life of the dry powder delivery system. Meanwhile, since the first pipeline is located in the central area of ​​the lifting arm, its weight distribution is close to the central axis of the lifting arm. This prevents significant off-center loading moments during the lifting arm's luffing and telescopic movements, maintaining the accuracy and stability of the lifting arm's movement and reducing the load on the drive system and the risk of structural fatigue. In summary, this multi-agent combined lifting arm has a simple structure, improves the protection of the dry powder pipeline, and effectively avoids the off-center loading effect of externally located dry powder pipelines. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 This is a three-dimensional structural diagram of a multi-agent lifting boom provided by this utility model.

[0021] Figure 2 This is a schematic diagram of the structure of a multi-agent lifting boom provided by this utility model when it is erected.

[0022] Figure 3 yes Figure 2 The diagram shows a cross-sectional view of the multi-agent lifting boom along the axial direction.

[0023] Figure 4 This is a top view structural diagram of a multi-agent lifting boom provided by this utility model.

[0024] Figure 5 This is a schematic diagram of the radial cross-sectional structure of a lifting arm provided by this utility model.

[0025] Figure 6 This is a schematic diagram of the structure of a lifting arm, a support component, and a first pipeline connection provided by this utility model.

[0026] Figure 7 This is a structural schematic diagram of a fire truck provided by this utility model.

[0027] Figure 8 This is a structural schematic diagram of a fire truck in another state provided by this utility model.

[0028] Figure label: 1. Support platform; 2. Lifting arm; 21. Conveying channel; 3. Fire monitor; 31. Adjustment mechanism; 32. Monitor head; 4. Dry powder pipeline; 41. First pipeline; 42. Second pipeline; 5. Supporting components; 51. Connecting opening; 52. Curved plate; 53. Supporting plate; 6. Power unit; 7. Rotary joint; 8. Vehicle body. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0030] The following is combined Figure 1-6 This utility model provides a multi-agent lifting boom, including a support platform 1, a lifting boom 2, a fire monitor 3, and a dry powder pipeline 4, wherein: One end of the lifting arm 2 is movably connected to the support platform 1, and a conveying channel 21 is provided inside the lifting arm 2.

[0031] The fire monitor 3 is located at the end of the lifting arm 2 away from the support platform 1 and is connected to the conveying channel 21.

[0032] The dry powder pipeline 4 includes: a first pipeline 41, which is arranged in the conveying channel 21; and a second pipeline 42, which passes through the side wall of the lifting arm 2 near one end of the fire monitor 3, with one end of the second pipeline 42 connected to the first pipeline 41 and the other end connected to the fire monitor 3.

[0033] The lifting arm 2 is rotatably connected to the support platform 1, allowing it to switch between a horizontal and vertical position to adjust the height of the fire monitor 3. The first pipeline 41 is used to transport the mixed liquid. The fire monitor 3 is a three-phase jet fire monitor 3, which can be selectively connected to the delivery channel 21 and / or the dry powder pipeline 4. When the fire monitor 3 is connected to the delivery channel 21, it is used to spray the mixed liquid. When the fire monitor 3 is connected to both the delivery channel 21 and the dry powder pipeline 4, the mixed liquid and dry powder are mixed at the fire monitor 3, enabling multi-agent combined fire extinguishing operations.

[0034] In this invention, by redesigning the internal structure of the lifting arm 2, it is made to serve both structural support and dual media delivery functions, achieving an organic unity of pipeline protection and functional integration through ingenious space utilization. Specifically, the support platform 1 provides a stable installation foundation for the entire lifting arm. One end of the lifting arm 2 is movably connected to the support platform 1 to form a luffing mechanism. The delivery channel 21 inside the lifting arm 2 provides a dedicated path for the delivery of the mixed liquid. The fire monitor 3 is located at the end of the lifting arm 2 away from the support platform 1 and is connected to the delivery channel 21 to ensure that the mixed liquid can smoothly reach the spray position. The dry powder pipeline 4 adopts a segmented design: the first pipeline 41 is completely arranged inside the delivery channel 21, utilizing the protective structure of the lifting arm 2 to achieve safe delivery of dry powder; the second pipeline 42 penetrates the side wall of the lifting arm 2 near the end adjacent to the fire monitor 3, reliably connecting the internal first pipeline 41 to the external fire monitor 3, forming a complete dry powder delivery link. When fire trucks are operating in complex environments, the built-in first pipeline 41 is fully protected by the lifting arm 2 structure, preventing direct impact from external high temperatures, corrosive gases, or mechanical shocks, thus ensuring the reliability and service life of the dry powder delivery system. Simultaneously, because the first pipeline 41 is located in the central area of ​​the lifting arm 2, its weight distribution is close to the central axis of the lifting arm 2. This prevents significant off-center loading moments during the luffing and telescopic movements of the lifting arm 2, maintaining the accuracy and stability of its movement and reducing the load on the drive system and the risk of structural fatigue. In summary, this multi-agent lifting arm structure is simple, improves the protection of the dry powder pipeline 4, and effectively avoids the off-center loading effect of an externally located dry powder pipeline 4.

[0035] In one specific embodiment, when the fire truck arrives at the fire scene, the operator activates the lifting boom system. The lifting boom 2 can be adjusted on the support platform 1 to precisely position the fire monitor 3 to the optimal fire extinguishing position. At this time, the onboard liquid mixture is delivered to the fire monitor 3 through the delivery channel 21, while the dry powder is also delivered to the fire monitor 3 through a combination of the first pipeline 41 and the second pipeline 42, achieving a mixed spray of the two extinguishing media at the fire monitor 3. Since the dry powder pipeline 4 is entirely located inside the lifting boom 2, it will not be affected or damaged by the external environment during the lifting boom 2's adjustment process, ensuring the continuity and reliability of the fire extinguishing operation. Compared to the traditional external pipeline solution, this internal solution greatly improves the fire truck's mobility in complex environments, allowing it to operate normally in narrow spaces and areas with dense obstacles without worrying about the pipeline being scratched or tangled.

[0036] In related technologies, existing multi-agent fire trucks generally adopt an external piping design, where the dry powder delivery pipeline is arranged on the outside of the lifting boom 2 and fixed to the surface of the lifting boom 2 by brackets or clamps. This design has several significant drawbacks: First, the external pipeline occupies the space around the lifting boom 2, increasing the overall size of the boom system and affecting the fire truck's maneuverability in narrow areas; second, the external pipeline is susceptible to environmental factors such as wind load, rain, snow, and high temperature, which may lead to accelerated aging or performance degradation of the pipeline; third, the external pipeline generates additional loads during the movement of the lifting boom 2, and this off-center loading will affect the movement accuracy and stability of the lifting boom 2, and may even lead to structural fatigue; finally, the external pipeline is prone to collision with external objects, posing a risk of damage in complex operating environments.

[0037] In this embodiment of the invention, by completely integrating the first pipe 41 within the conveying channel 21 inside the lifting arm 2, the various drawbacks of external pipes are entirely eliminated. The built-in first pipe 41 is fully protected by the lifting arm 2 structure and is not directly affected by the external environment, greatly improving the system's reliability and service life. Simultaneously, the built-in design eliminates the off-center loading problem caused by external pipes, making the movement of the lifting arm 2 smoother and more precise. Although the second pipe 42 needs to penetrate the side wall, its length is very short and its position is fixed, so it will not negatively affect the overall system's compactness and reliability. This design also brings additional advantages: the lifting arm 2 has a simpler and more aesthetically pleasing appearance, facilitating cleaning and maintenance; the center of gravity distribution of the entire system is more reasonable, which is beneficial to the stability of the fire truck; and the temperature environment of the built-in pipes is more stable, which is beneficial to the storage and conveying quality of dry powder.

[0038] In some embodiments, the first conduit 41 is coaxially arranged with the delivery channel 21.

[0039] In this invention, by coaxially arranging the first pipeline 41 and the conveying channel 21, the dry powder conveying pipeline and the mixed liquid conveying channel are arranged concentrically, ensuring the orderly separation and conveying of the two media inside the lifting arm 2, avoiding mutual interference, and optimizing fluid dynamics performance and structural stability. The core principle of the coaxial arrangement lies in utilizing the geometric characteristics of a circular cross-section to position the first pipeline 41 on the central axis of the conveying channel 21, forming a double-channel structure with concentric inner and outer sides.

[0040] Specifically, the first pipe 41, serving as the inner pipe, is specifically used for conveying dry powder. Its outer diameter is smaller than the inner diameter of the conveying channel 21, forming an annular space between them. The conveying channel 21, serving as the outer channel, has an annular space between its inner wall and the outer wall of the first pipe 41 used for conveying the mixed liquid. The coaxial arrangement means that the central axis of the first pipe 41 coincides with the central axis of the conveying channel 21. This geometric relationship ensures the symmetry and uniformity of the two channels. During fluid transport, the dry powder flows axially inside the first pipe 41, and the mixed liquid also flows axially within the annular space. The flow paths of the two media are parallel and separate, avoiding cross-interference. The coaxial arrangement also gives the entire dual-channel system good structural symmetry, which is beneficial for withstanding internal pressure and external loads.

[0041] In one specific embodiment, when the fire-fighting system is operating, the vehicle-mounted dry powder enters the first pipeline 41 through the powder supply system. Because the first pipeline 41 and the delivery channel 21 are coaxially aligned, the flow of dry powder within the pipeline is very stable, preventing eddies or blockages due to eccentricity or asymmetry. Simultaneously, the mixed liquid enters the delivery channel 21 from the base of the lifting arm 2, flowing uniformly within the annular space. The coaxial alignment ensures circumferential uniformity of the annular space, resulting in a more even distribution of the mixed liquid's flow velocity and reduced energy loss. This design is particularly effective under high-pressure conditions: when the fire monitor 3 requires remote spraying, the internal system pressure is high. The coaxial structural symmetry ensures a uniform distribution of pressure load, preventing structural deformation or pipeline displacement caused by eccentric loads and ensuring safe and reliable operation under high-pressure conditions.

[0042] In related technologies, if the arrangement of the first pipe 41 within the conveying channel 21 is not coaxial but eccentric or arbitrary, some technical defects still exist. An eccentric arrangement leads to unevenness in the annular space, causing the flow of the mixture within the annular space to deviate, with some areas having excessively high flow velocities while others have excessively low velocities. This uneven flow increases flow resistance and energy loss. Simultaneously, the eccentric arrangement subjectes the first pipe 41 to uneven loads, making it prone to vibration or displacement under system operating pressure, affecting conveying stability. Furthermore, during the luffing motion of the lifting arm 2, the eccentric arrangement may cause the first pipe 41 to contact or rub against the inner wall of the conveying channel 21, leading to wear and sealing problems.

[0043] In this embodiment of the invention, the coaxial arrangement of the first pipeline 41 and the conveying channel 21 perfectly solves the various problems associated with eccentric arrangements. The coaxial arrangement ensures the circumferential uniformity of the annular space, allowing the mixture to flow uniformly throughout the entire annular cross-section with a symmetrical velocity distribution, significantly reducing flow resistance and pressure loss, and improving conveying efficiency. Structural symmetry ensures a uniform load distribution on the first pipeline 41, eliminating vibration and displacement caused by eccentric loads and ensuring long-term operational stability. The coaxial arrangement also facilitates the support and fixation of the first pipeline 41, making it easier to design a reasonable support structure to maintain the coaxial relationship. From a manufacturing and installation perspective, the coaxial arrangement provides a clear geometric reference, facilitating precision control and assembly quality assurance, and promoting product standardization and large-scale production.

[0044] In some embodiments, the length of the first conduit 41 is less than or equal to the length of the delivery channel 21.

[0045] In this invention, by limiting the length of the first pipeline 41 to be less than or equal to the length of the conveying channel 21, it is ensured that the dry powder conveying pipeline can be completely accommodated within the protective structure of the lifting arm 2. This achieves rational pipeline layout and installation feasibility, avoiding problems such as installation difficulties due to excessively long pipelines or functional incompleteness due to excessively short pipelines. This length relationship is set based on both structural adaptability and functional integrity, providing flexible design space for different application requirements.

[0046] Specifically, when the length of the first pipe 41 is equal to the length of the conveying channel 21, the dry powder conveying path is maximized. The first pipe 41 runs through the entire conveying channel 21, extending from the base of the lifting arm 2 to near the fire monitor 3. This design ensures that the main path of dry powder conveying is entirely within the protection range of the lifting arm 2, minimizing the impact of the external environment on dry powder conveying. When the length of the first pipe 41 is less than the length of the conveying channel 21, the first pipe 41 can enter the conveying channel 21 from a suitable position near the support platform 1 on the lifting arm 2. This design provides greater flexibility for the connection between the first pipe 41 and the vehicle body 8 piping system, facilitating optimized design based on the layout of the vehicle body 8 and the piping routing. Regardless of the length configuration, the second pipe 42 ensures a reliable connection between the first pipe 41 and the fire monitor 3, forming a complete dry powder conveying link.

[0047] In one specific embodiment, for large aerial work platform fire trucks, where the lifting arm 2 is relatively long, a design scheme is adopted in which the length of the first pipeline 41 is equal to the length of the conveying channel 21. This ensures that long-distance dry powder conveying is entirely protected by the lifting arm 2, avoiding the wind load impact and mechanical damage risks that may arise from externally mounted long pipelines. For compact fire trucks, where the vehicle body 8 has a compact spatial layout, the pipeline system needs to achieve complex routing within a limited space. In this case, a design where the length of the first pipeline 41 is less than the length of the conveying channel 21 allows the first pipeline 41 to enter the conveying channel 21 from the middle section of the lifting arm 2, leaving space at the base to accommodate complex pipeline joints and adapters. This ensures protection of the main conveying path while also facilitating system integration. This flexible length design also benefits maintenance: a shorter first pipeline 41 facilitates disassembly and replacement, while a longer first pipeline 41 reduces the number of joints and lowers the risk of leakage.

[0048] In this embodiment of the invention, by limiting the length of the first pipe 41 to be less than or equal to the length of the conveying channel 21, an optimal balance between maximizing pipe protection and installation feasibility is achieved. This length limitation ensures that the first pipe 41 can fully utilize the protection space inside the lifting arm 2, while avoiding installation problems caused by excessive length. When the length of the first pipe 41 is equal to the length of the conveying channel 21, the protection effect is maximized; when the length of the first pipe 41 is less than the length of the conveying channel 21, design and installation flexibility is provided. This flexible length design also facilitates product serialization and standardization: the first pipe 41 of appropriate length can be designed according to different specifications of lifting arms 2 to achieve the best cost performance. At the same time, a reasonable length design also benefits the flow characteristics of dry powder in the pipe: it avoids pressure loss and uneven flow that may be caused by excessively long pipes, ensuring that the dry powder can reach the fire monitor 3 at appropriate pressure and flow rate.

[0049] In some embodiments, the second pipeline 42 is a flexible pipe; the fire monitor 3 includes: an adjustment mechanism 31 connected to the lifting arm 2; and a monitor head 32 disposed at the movable end of the adjustment mechanism 31; wherein the adjustment mechanism 31 is used to adjust the spray angle of the monitor head 32.

[0050] In this invention, by designing the second pipe 42 as a flexible pipe and cooperating with the adjustment mechanism 31 and nozzle 32 structure of the fire monitor 3, the dry powder conveying system achieves perfect adaptation to the angle adjustment of the fire monitor 3. This solves the technical problem that the second pipe 42 needs to adapt to positional changes when the fire monitor 3 adjusts its spray angle, ensuring the continuity and reliability of dry powder conveying at any adjustment angle. The core of this technical solution lies in the organic combination of the deformation adaptability of the flexible pipe and the precise adjustment function of the fire monitor 3.

[0051] Specifically, the second pipe 42 adopts a flexible pipe design, possessing excellent bending performance and fatigue resistance, allowing it to bend freely within a certain range without affecting the unobstructed flow of the internal channels. The adjustment mechanism 31 of the fire monitor 3 is fixedly connected to the lifting arm 2, serving as the support and drive base for the fire monitor 3, and achieving precise angle adjustment via hydraulic, electric, or manual means. The nozzle 32 is located at the movable end of the adjustment mechanism 31, changing its spatial position and spray direction as the adjustment mechanism 31 moves. When the adjustment mechanism 31 drives the nozzle 32 to adjust its angle, the position of the nozzle 32 changes in three-dimensional space. The flexibility of the second pipe 42 allows it to follow the movement trajectory of the nozzle 32 and undergo corresponding bending deformation, always maintaining a reliable connection with the first pipe 41 and the fire monitor 3. The precise control of the adjustment mechanism 31 ensures that the nozzle 32 can accurately position itself to the required spray angle, achieving precise target coverage.

[0052] In one specific embodiment, when facing a fire in a high-rise building, firefighters need to adjust the fire monitor 3 from a horizontal position to gradually adjust it upwards to the optimal elevation angle for spraying. During this adjustment process, the adjustment mechanism 31 drives the nozzle 32 to rotate from a horizontal position to an elevation position, causing continuous changes in the spatial coordinates of the nozzle 32. If the second pipeline 42 is a rigid pipe, it will inevitably be subjected to tensile or compressive stress during this angle adjustment process, which may lead to pipeline deformation, loosening of joints, or even breakage. However, the second pipeline 42, with its flexible pipe design, can smoothly adapt to this positional change, maintaining the integrity and sealing of the pipeline throughout the adjustment process, ensuring uninterrupted dry powder delivery. At the same time, the precise control of the adjustment mechanism 31 allows the nozzle 32 to accurately position itself at the optimal attack angle to the fire point, achieving a highly efficient fire extinguishing effect. This design is particularly suitable for operational scenarios that require frequent adjustments to the spray angle, such as moving target fire extinguishing, multi-point alternating fire extinguishing, and other complex operational conditions.

[0053] In some embodiments, a support member 5 is also included, which is disposed within the conveying channel 21 to support the first pipeline 41.

[0054] In this invention, by providing a support member 5 within the conveying channel 21 to support the first pipeline 41, the dry powder conveying pipeline is stably fixed inside the lifting arm 2. This ensures that the first pipeline 41 maintains the correct position and shape under various working conditions, preventing pipeline deformation or displacement caused by vibration, pressure changes, or gravity, and providing a reliable structural guarantee for the stable conveying of dry powder. The design of the support member 5 fully considers the complex working environment and multiple functional requirements within the conveying channel 21.

[0055] Specifically, the support member 5 is disposed within the conveying channel 21, in the annular space between the outer surface of the first pipe 41 and the inner wall of the conveying channel 21. It provides radial support through direct contact with the first pipe 41, preventing displacement or deformation of the first pipe 41 in the radial direction. The material and structural design of the support member 5 considers material compatibility with the first pipe 41 and the conveying channel 21, avoiding electrochemical corrosion or mechanical wear caused by material differences. The shape and dimensions of the support member 5 are precisely designed to provide sufficient support while avoiding excessive obstruction to the flow of the mixture. The fixing method of the support member 5 ensures that it will not loosen or fall off during system operation, while also facilitating installation and maintenance. The support member 5 also needs to withstand the dynamic load generated by the flow of dry powder within the first pipe 41 and the inertial force during the movement of the lifting arm 2, thus possessing sufficient strength and rigidity.

[0056] In one specific embodiment, when the fire truck travels on bumpy roads or the boom 2 undergoes rapid luffing movements, the first pipeline 41 is subjected to complex dynamic loads. Without the support member 5, the first pipeline 41 may experience irregular movement within the delivery channel 21, or even collide with the inner wall of the channel, leading to pipeline wear or damage. The presence of the support member 5 ensures that the first pipeline 41 maintains a stable spatial position, preserving its coaxial relationship with the delivery channel 21 even under severe external disturbances. When the system operates at high pressure, the dry powder pressure within the first pipeline 41 generates radial expansion force; the constraint provided by the support member 5 ensures that the first pipeline 41 does not contact the inner wall of the delivery channel 21 due to pressure expansion. During long-term use, the support member 5 also plays a role in vibration damping, absorbing and dispersing the vibration energy of the first pipeline 41, reducing fatigue damage, and extending the system's service life.

[0057] In some embodiments, the support member 5 is provided with a connecting port 51 along the extension direction of the conveying channel 21, and the connecting port 51 is used to connect the spaces on both sides of the support member 5.

[0058] In this invention, by providing a connecting port 51 on the supporting member 5 along the extension direction of the conveying channel 21, effective communication between the spaces on both sides of the supporting member 5 is achieved, ensuring smooth flow of the mixture within the annular channel and preventing the supporting member 5 from obstructing fluid delivery, while maintaining the effective support function of the supporting member 5 for the first pipeline 41. This design cleverly balances the contradiction between structural support requirements and fluid delivery requirements.

[0059] like Figure 6As shown, specifically, the support member 5 includes an arc-shaped plate 52 and a support plate 53. The arc-shaped plate 52 abuts against the outer circumferential surface of the first pipeline 41, and the support plate 53 is connected to the outer surface of the arc-shaped plate 52 and extends along the extension direction of the conveying channel 21. One arc-shaped plate 52 is connected to at least two support plates 53. Multiple support plates 53 are arranged radially, extending radially from the outer surface of the arc-shaped plate 52 to the inner wall of the conveying channel 21, establishing a stable radial connection between the first pipeline 41 and the conveying channel 21. The multiple support plates are evenly distributed along the circumference of the first pipeline 41, forming a regular radial support array, providing 360-degree radial support for the first pipeline 41. The space naturally formed between adjacent support plates is the connecting port 51. These connecting ports 51 are continuously distributed along the extension direction of the conveying channel 21, providing sufficient channel space for the axial flow of the mixture. The dimensions and shape of the connecting ports 51 are carefully designed to ensure sufficient flow area to meet the flow rate requirements of the mixture, while also ensuring that the support plate has sufficient width to provide effective support. The thickness and material strength of the support plate are designed to withstand the load of the first pipeline 41, while optimizing the impact on fluid flow. In addition, the uniformly arranged connecting ports 51 can play a certain role in equalizing the flow of the mixture, ensuring the uniformity of the mixture's delivery within the conveying channel 21.

[0060] In one specific embodiment, when the fire protection system requires a large flow of the mixed liquid, the mixed liquid enters the delivery channel 21 from the base of the lifting arm 2 and flows towards the fire monitor 3 along the annular space. Due to the design of the connecting port 51 of the support member 5, the mixed liquid can smoothly pass through each support member 5 without forming flow dead zones or pressure accumulation. The reasonable arrangement of the connecting port 51 minimizes the flow resistance of the mixed liquid when passing through the support member 5, maintaining high delivery efficiency. At the same time, the radially distributed support plates provide stable support for the first pipeline 41, ensuring that the first pipeline 41 maintains a stable coaxial position even under high pressure and high flow conditions. This design is particularly effective when the fire monitor 3 requires a rapid response: the mixed liquid can reach the fire monitor 3 in the shortest time and with the least resistance, ensuring timely fire extinguishing response. The presence of the connecting port 51 also facilitates system maintenance and cleaning, allowing the cleaning fluid to flow smoothly through the entire delivery channel 21 without forming cleaning dead zones at the support member 5.

[0061] In some embodiments, multiple support members 5 are provided at intervals along the extension direction of the conveying channel 21.

[0062] In this invention, by arranging multiple support members 5 at intervals along the extension direction of the conveying channel 21, distributed support is achieved throughout the entire length of the first pipeline 41. This ensures that the first pipeline 41 maintains an accurate coaxial position along its entire length, avoiding local deformation or positional deviation, while also providing the first pipeline 41 with excellent vibration resistance and load-bearing capacity. The spaced arrangement of the multiple support members 5 is based on a comprehensive optimization design of structural mechanics and fluid mechanics.

[0063] Specifically, multiple support members 5 are arranged in an orderly manner along the extension direction of the conveying channel 21 at a certain axial spacing, forming a multi-point constraint system for the first pipeline 41. Each support member 5 independently provides radial support for the first pipeline 41. The multiple support members 5 work together to decompose the long span of the first pipeline 41 into multiple short spans, significantly improving the overall stiffness of the first pipeline 41. The spacing of the support members 5 is precisely calculated to ensure that the first pipeline 41 will not experience excessive deflection at any position, while also avoiding increased manufacturing costs and flow resistance due to overly dense support members 5. The spacing also takes into account the natural vibration frequency of the first pipeline 41, avoiding resonance through a reasonable distribution of support points. The support stiffness and damping characteristics of each support member 5 are designed to ensure effective dissipation of vibration energy. The axial positioning accuracy of the support members 5 ensures the full-process control of the coaxiality of the first pipeline 41.

[0064] In one specific embodiment, for a long lifting arm 2, a single or a few support members 5 may not be sufficient to provide adequate support for the entire first pipeline 41. The spaced arrangement of multiple support members 5 allows the first pipeline 41 to be supported at multiple fulcrums, much like a continuous beam. The free length of each segment of the first pipeline 41 is significantly shortened, and its deflection and deformation are controlled within a very small range. When the lifting arm 2 undergoes luffing motion, changes in acceleration generate inertial forces in the first pipeline 41. The multi-point support system can effectively transfer these inertial forces to the lifting arm 2 structure, preventing the first pipeline 41 from experiencing excessive bending stress. Under high-pressure conditions, the pressure within the first pipeline 41 generates radial and axial expansion forces. Distributed support can constrain these deformations locally, maintaining the geometric stability of the first pipeline 41. This design demonstrates excellent reliability in long-term use: even if one support member 5 wears or fails, other support members 5 can still maintain the basic stability of the first pipeline 41, improving the system's fault tolerance.

[0065] In some embodiments, a power unit 6 is also included. The fixed end of the power unit 6 is connected to the support platform 1, and the movable end of the power unit 6 is connected to the lifting arm 2 for adjusting the height of the lifting arm 2.

[0066] In this invention, by setting up a power unit 6 and connecting its fixed end to the support platform 1 and its movable end to the lifting arm 2, the height of the lifting arm 2 is dynamically adjusted. This provides a precise and reliable luffing function for multi-agent lifting arms, enabling the fire monitor 3 to be quickly adjusted to the optimal working height, greatly improving the efficiency and adaptability of firefighting operations. The power unit 6, as a specialized luffing actuator, features high load-bearing capacity, high control precision, and fast response speed.

[0067] Specifically, the power unit 6 employs a luffing cylinder, leveraging the advantages of hydraulic transmission to provide powerful lifting force and precise position control. The fixed end of the luffing cylinder is securely fixed to the support platform 1 via a mechanical connection, forming a stable support foundation capable of withstanding all reaction forces during the lifting process. The movable end is hinged to the lifting arm 2, allowing the lifting arm 2 to adjust its angle relative to the movable end of the cylinder during luffing, avoiding additional bending stress. The stroke design of the luffing cylinder covers the entire luffing range of the lifting arm 2 from its lowest to its highest position, typically enabling large-angle adjustments from a horizontal to near-vertical position. Pressure and flow control of the hydraulic system ensures the smoothness and precision of the luffing action, enabling stepless speed regulation and precise positioning. The internal sealing system of the cylinder guarantees long-term reliability and safety.

[0068] In one specific embodiment, when the fire truck arrives at the fire scene, the operator, based on the height and distance requirements of the fire, operates the luffing cylinder via the hydraulic control system to quickly adjust the boom 2 to the optimal attack angle. For ground-level or low-rise building fires, the boom 2 can maintain a low elevation angle for horizontal or small-angle spraying; for high-rise building fires, the boom 2 can be adjusted to a larger elevation angle for high-altitude spraying. The powerful thrust of the luffing cylinder ensures that even when the boom 2 is carrying the fire monitor 3, piping system, and media, angle adjustments can still be completed quickly and smoothly. The precise control of the hydraulic system allows the boom 2 to be accurately positioned at any intermediate position, meeting the needs of precise attack on targets at different heights. During operation, if the fire situation changes or the attack angle needs to be adjusted, the luffing cylinder can respond to operating commands at any time, achieving dynamic angle adjustments, greatly improving the flexibility and effectiveness of firefighting operations.

[0069] In some embodiments, a rotary joint 7 is also included, which is rotatably connected to the lifting arm 2 and communicates with the conveying channel 21.

[0070] In this invention, by setting a rotary joint 7 and rotatably connecting it to the lifting arm 2 while simultaneously communicating with the conveying channel 21, a continuous and stable supply of the mixed liquid is achieved during the luffing process of the lifting arm 2. This solves the technical problem of ensuring continuous liquid supply during the angle adjustment of the lifting arm 2, ensuring that the fire extinguishing effect is not affected by the interruption of liquid supply during firefighting operations. As a specialized fluid rotation transmission device, the rotary joint 7 can maintain reliable sealing and fluid transmission functions during relative movement.

[0071] Specifically, one end of the rotary joint 7 is reliably connected to the delivery channel 21 of the lifting arm 2, establishing a complete mixed liquid delivery path from the rotary joint 7 to the fire monitor 3. The other end of the rotary joint 7 is connected to the mixed liquid container inside the vehicle body 8, providing the mixed liquid source to the lifting arm through the onboard liquid supply system. The rotary joint 7 and the lifting arm 2 can rotate relative to the rotation axis of the lifting arm 2, and this rotation capability covers the entire range of amplitude of the lifting arm 2 from horizontal to vertical position. The rotary joint 7 employs advanced sealing technology, such as mechanical seals or dynamic sealing rings, to ensure that no leakage occurs during rotation. The flow channel design of the rotary joint 7 ensures smooth flow of the mixed liquid as it passes through the rotary joint 7, minimizing pressure loss. The bearing system of the rotary joint 7 is designed to withstand loads during rotation, including its own weight, fluid pressure, and external loads. The material selection for the rotary joint 7 takes into account the chemical compatibility and corrosion resistance requirements of the mixed liquid.

[0072] In one specific embodiment, when firefighters need to adjust the attack angle of the boom 2, the luffing cylinder drives the boom 2 to rotate from its current position to the target position. During this rotation, the rotary joint 7 moves along with the boom 2, and its internal rotating mechanism allows the two parts of the joint to rotate relative to each other, thereby adapting to the angle change of the boom 2. Throughout the luffing process, the liquid mixture in the vehicle body 8 continuously flows into the delivery channel 21 through the rotary joint 7 and is then delivered to the fire monitor 3, achieving an uninterrupted supply of liquid mixture. This continuous liquid supply capability is particularly important for fighting large fires, as any interruption in the supply may cause the fire to recur or expand. The reliable seal of the rotary joint 7 ensures that no leakage will occur under high-pressure conditions, guaranteeing the safety and environmental friendliness of the system. Once the boom 2 is adjusted to the correct position, the rotary joint 7 maintains the corresponding angle position, continuing to provide a stable supply of liquid mixture, supporting long-term continuous operation.

[0073] In this embodiment of the invention, the ingenious design of the rotary joint 7 perfectly solves the problem of continuous fluid supply during the luffing process. The professional design of the rotary joint 7 ensures reliable fluid transmission at any luffing angle, eliminating the impact of angle changes on the fluid supply system. Compared to flexible piping solutions, the rotary joint 7 offers better flow characteristics and higher reliability, reducing flow resistance and maintenance requirements. The compact design of the rotary joint 7 does not increase the system's overall size, maintaining a simple overall layout. The application of rotary sealing technology ensures long-term reliability, reducing leakage risks and maintenance frequency. This design also provides a foundation for automated system control, enabling coordinated control of the lifting arm 2 angle adjustment and the fluid supply system. From an operational perspective, the presence of the rotary joint 7 allows operators to focus on fire assessment and angle adjustment without worrying about fluid supply issues, improving operational convenience and safety. The standardized design of the rotary joint 7 also facilitates system modularization and maintenance convenience.

[0074] In some embodiments, the lifting arm 2 is a telescopic boom, and the first pipeline 41 is a telescopic pipeline.

[0075] In this invention, by designing the lifting boom 2 as a telescopic boom and coordinating it with the telescopic design of the first pipeline 41, the fire-fighting operation radius is significantly expanded. This allows the fire truck to achieve long-distance operation capabilities while maintaining a compact vehicle body, effectively resolving the contradiction between the fire truck's mobility and operating range, and providing a flexible and efficient solution for fire-fighting operations in complex environments. The design of the telescopic system integrates advanced achievements in mechanical engineering, hydraulic technology, and sealing technology.

[0076] Specifically, the lifting boom 2 adopts a telescopic boom design, typically a multi-section sleeve structure, with each section capable of axial extension and retraction via hydraulic drive. The first pipeline 41 employs a corresponding telescopic pipeline design, allowing for length adjustment synchronized with the extension and retraction of the lifting boom 2. The telescopic system is typically driven by a hydraulic cylinder or hydraulic motor in conjunction with a pulley and rope system, providing powerful extension force and precise position control. Guide devices are used between each boom section to ensure smooth extension and retraction and coaxiality, preventing jamming caused by uneven loading or extension. The extension and retraction of the first pipeline 41 can be achieved through a sleeve design, corrugated pipe sections, or flexible connecting sections, ensuring continuous and sealed dry powder delivery at any extension position. The telescopic system is also equipped with a corresponding locking mechanism, reliably locking after extension and retraction to withstand operational loads.

[0077] In one specific embodiment, after the fire truck arrives at the fire scene, the operator can control the extension and retraction system of the boom 2 based on the distance to the fire and the surrounding environment. For close-range targets, the boom 2 remains retracted, reducing space occupation and facilitating maneuverability in confined areas; for distant targets, the boom 2 can extend to its maximum length, pushing the fire monitor 3 to the optimal attack position. During the extension and retraction of the boom 2, the first pipeline 41 extends and retracts synchronously, always maintaining a match with the boom 2 to ensure the integrity of the dry powder delivery path. This design is particularly suitable for firefighting operations in large industrial areas or densely populated high-rise building areas. The fire truck can park at a relatively safe distance and then approach the fire point via boom extension and retraction. The extension and retraction function also helps to cross obstacles or bypass buildings for firefighting operations, greatly expanding the fire truck's operational adaptability. In the retracted state, the fire truck's overall size is compact, facilitating rapid maneuverability and road access, while the large operating radius in the extended state ensures firefighting capabilities.

[0078] In some embodiments, the lifting arm 2 is made of aluminum alloy.

[0079] In this invention, by using aluminum alloy to manufacture the lifting boom 2, a lightweight design of the lifting boom system is achieved. This significantly reduces the system weight while ensuring sufficient structural strength, improving the overall performance of the fire truck, including enhanced mobility, reduced energy consumption, and increased stability, while also providing weight reserves for future system functional expansion. The choice of aluminum alloy is based on a comprehensive consideration of its excellent strength-to-weight ratio, corrosion resistance, and processing performance.

[0080] Specifically, the lifting boom 2 is made of high-strength aluminum alloy, such as 6061-T6 or 7075-T6, which possesses excellent mechanical properties and corrosion resistance. The density of aluminum alloy is approximately one-third that of steel, resulting in significant weight reduction for the same volume. The yield strength and tensile strength of aluminum alloy can be achieved to high levels through alloying and heat treatment, meeting the strength requirements of the lifting boom 2 in bearing the fire monitor 3, piping system, and operational loads. Aluminum alloy exhibits good fatigue performance, suitable for withstanding cyclic loads during the boom 2's luffing and extension processes. The oxide film formed on the aluminum alloy surface provides natural corrosion protection, making it particularly suitable for use in humid, high-temperature, or corrosive environments. Aluminum alloy has good thermal conductivity, facilitating heat dissipation, which is advantageous for fire-fighting equipment that may be exposed to high-temperature environments. Aluminum alloy has good machinability, facilitating precision manufacturing and surface treatment.

[0081] like Figure 7 and 8 As shown, this utility model provides a fire truck, including: a vehicle body 8; and the aforementioned multi-agent lifting boom.

[0082] In this utility model, by integrating the aforementioned multi-agent combined lifting boom onto a fire truck, an advanced multi-agent combined fire protection technology and a mobile platform are perfectly combined, providing a complete, efficient, and mobile fire extinguishing solution for fire rescue. This greatly improves the response speed, operational efficiency, and adaptability of fire rescue, meeting the urgent needs of modern fire rescue for rapid response, remote operation, and diversified fire extinguishing methods.

[0083] Specifically, the fire truck body 8 provides a stable load-bearing platform and power source for the entire system. The body 8 houses supporting equipment such as a mixed liquid storage system, a dry powder storage system, a hydraulic power system, and an electrical control system. The multi-agent lifting boom is installed at an appropriate location on the body 8, typically at the rear or side, and is securely connected to the body 8 via a support platform 1. The mixed liquid system of the body 8 is connected to the lifting boom's delivery channel 21 via pipelines, providing a continuous supply of mixed liquid for firefighting operations. The dry powder system of the body 8 is connected to the lifting boom's dry powder pipeline 4 via a dedicated powder supply device, enabling automatic dry powder delivery. The hydraulic system of the body 8 provides power to the lifting boom's luffing cylinders and telescopic system. The electrical system of the body 8 provides electrical and signal support for the lifting boom's control, monitoring, and safety protection. The operator's cab of the body 8 houses the lifting boom's control devices, allowing the operator to control the entire system from a safe location.

[0084] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0085] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A multi-agent combined lifting boom, characterized in that, include: Support platform (1); Lifting arm (2), one end of which is movably connected to the support platform (1), and a conveying channel (21) is provided inside the lifting arm (2). A fire monitor (3) is located at one end of the lifting arm (2) away from the support platform (1) and is connected to the conveying channel (21); Dry powder pipeline (4), the dry powder pipeline (4) includes: The first pipeline (41) is arranged in the conveying channel (21); The second pipe (42) passes through the side wall of the lifting arm (2) near one end of the fire monitor (3). One end of the second pipe (42) is connected to the first pipe (41), and the other end is connected to the fire monitor (3).

2. The multi-agent lifting boom according to claim 1, characterized in that, The first pipeline (41) is coaxially arranged with the conveying channel (21).

3. The multi-agent lifting boom according to claim 1, characterized in that, The length of the first pipeline (41) is less than or equal to the length of the delivery channel (21).

4. The multi-agent lifting boom according to claim 1, characterized in that, The second pipeline (42) is a flexible pipe; the fire monitor (3) includes: Adjustment mechanism (31) is connected to the lifting arm (2); The cannon head (32) is located at the movable end of the adjustment mechanism (31); The adjustment mechanism (31) is used to adjust the spray angle of the gun head (32).

5. The multi-agent lifting boom according to claim 1, characterized in that, It also includes a support member (5), which is disposed in the conveying channel (21) and is used to support the first pipeline (41).

6. The multi-agent lifting boom according to claim 5, characterized in that, The support member (5) is provided with a connecting port (51) along the extension direction of the conveying channel (21), and the connecting port (51) is used to connect the spaces on both sides of the support member (5).

7. The multi-agent lifting boom according to claim 5, characterized in that, The support member (5) is provided in multiple intervals along the extension direction of the conveying channel (21).

8. The multi-agent lifting boom according to any one of claims 1-7, characterized in that, It also includes a power unit (6), the fixed end of which is connected to the support platform (1), and the movable end of which is connected to the lifting arm (2) for adjusting the height of the lifting arm (2).

9. The multi-agent lifting boom according to any one of claims 1-7, characterized in that, The lifting arm (2) is a telescopic boom, and the first pipeline (41) is a telescopic pipeline.

10. A fire truck, characterized in that, include: Vehicle body (8); The multi-agent lifting boom according to any one of claims 1-9.

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