Folding telescopic boom structure and fire fighting truck

Abstract

The utility model relates to the field of fire fighting, and provides a folding telescopic boom structure and a fire fighting truck. The folding telescopic boom structure comprises a folding arm, and a hinge hole is formed in the first end of the folding arm. A fluid pipe is arranged in the telescopic arm in a penetrating mode, a liquid supply pipe is arranged in the hinge hole, the telescopic arm is hinged to the hinge hole through the liquid supply pipe, a rotary elbow is rotatably arranged at one end of the liquid supply pipe, and the fluid pipe is in fluid communication with the liquid supply pipe through the rotary elbow. According to the folding telescopic boom structure, the use flexibility is improved; the requirements of different angles and positions can be met; it is guaranteed that the fluid pipe does not twist, smoothness of water flow is guaranteed, and then stable water source supply can be provided for water equipment. And as the fluid pipe does not twist, the service life of the fluid pipe is prolonged, and the maintenance cost is reduced. Meanwhile, the folding telescopic boom structure can bear large work load, and durability and reliability of the folding telescopic boom structure are guaranteed.

Description

Technical Field

[0001] The utility model relates to the field of fire protection and provides a folding telescopic arm structure and a fire truck. Background Art

[0002] In the prior art, the telescopic boom structure at the end of a fire truck typically places the boom and liquid supply pipe separately at the end of the folding arm. This arrangement requires separate drive mechanisms, such as hydraulic cylinders, and centralizing these drive mechanisms and piping at the end of the boom, increasing the weight of the boom and reducing the stability of the boom system. Furthermore, since the telescopic boom at the end is connected to the liquid supply pipe, the rotation of the telescopic arm relative to the end of the folding arm can cause the liquid supply pipe to twist. Over time, this can cause the pipe to break, impacting water supply efficiency. Utility Model Content

[0003] The embodiment of the utility model provides a foldable telescopic arm structure, which is used to solve the defect in the related art that the liquid supply pipe is prone to twisting.

[0004] An embodiment of the present utility model also provides a fire truck.

[0005] A first embodiment of the present invention provides a foldable telescopic boom structure, comprising:

[0006] a folding arm, wherein a first end of the folding arm is provided with a hinge hole;

[0007] A telescopic arm, wherein a fluid tube is passed through the telescopic arm, a liquid supply tube is provided in the hinge hole, the telescopic arm is hinged to the hinge hole through the liquid supply tube, a return elbow is rotatably provided at one end of the liquid supply tube, and the fluid tube is fluidically connected to the liquid supply tube through the return elbow.

[0008] According to one embodiment of the present invention, the telescopic arm comprises:

[0009] an outer sleeve, wherein the fluid pipe is passed through the outer sleeve;

[0010] The telescopic tube is adapted to be partially passed through the outer sleeve via the guide mechanism and to be in fluid communication with the fluid tube.

[0011] According to one embodiment of the present invention, the guide mechanism includes:

[0012] a guide groove provided in one of the telescopic tube and the outer sleeve;

[0013] A guide rail is matched with the guide groove for guidance, and the guide rail is arranged on the other one of the telescopic tube and the outer sleeve.

[0014] According to one embodiment of the present utility model, a first control port is provided at the first end of the outer sleeve, a second control port is provided at the second end of the outer sleeve, an extension cavity and a retraction cavity are formed in the outer sleeve, the first control port is communicated with the extension cavity, the second control port is communicated with the retraction cavity, and the telescopic tube is sealedly connected to the extension cavity and the retraction cavity.

[0015] According to one embodiment of the present invention, a water-using device is provided at one end of the telescopic tube extending out of the outer sleeve.

[0016] According to one embodiment of the present invention, a cable reel is provided on the outer wall surface of the outer sleeve, a water monitor cable is wound around the cable reel, and at least one of the outer sleeve and the telescopic tube is provided with a cable seat, and the water monitor cable is connected to the water-using equipment by passing through the cable seat.

[0017] According to an embodiment of the present invention, a first elbow is provided on the return elbow, and a second elbow is provided on the fluid pipe, and the first elbow and the second elbow are suitable for being connected by a clamp.

[0018] According to one embodiment of the present invention, the telescopic arm is an aluminum alloy telescopic arm.

[0019] According to one embodiment of the present invention, it further comprises an amplitude changing assembly, wherein the amplitude changing assembly is connected between the folding arm and the telescopic arm.

[0020] A second embodiment of the present invention provides a fire truck, comprising a vehicle body, on which the above-mentioned folding telescopic arm structure is installed.

[0021] According to the first embodiment of the present invention, the foldable telescopic boom structure provided by the present invention utilizes a combined design of a foldable arm and a telescopic arm, which not only reduces the space occupied by the foldable telescopic boom structure but also improves its flexibility. A hinge hole is provided at the first end of the foldable arm, allowing the telescopic arm to flexibly rotate about the hinge hole to adapt to different angles and positions. By providing a liquid supply pipe in the hinge hole and connecting the telescopic arm to the liquid supply pipe, the fluid pipe and the liquid supply pipe are connected via a reversing elbow. This allows the fluid pipe running inside the telescopic arm to rotate relative to the liquid supply pipe. Regardless of how the telescopic arm rotates, the fluid pipe itself is prevented from twisting, ensuring unimpeded water flow and providing a stable water supply for water-using equipment (such as fire monitors and fire guns). Because the fluid pipe itself does not twist, its service life is extended, reducing maintenance costs. Furthermore, the foldable telescopic boom structure can withstand heavy workloads, ensuring its durability and reliability.

[0022] According to the fire truck provided by the embodiment of the second aspect of the present invention, since the folding telescopic boom structure integrates the telescopic arm and the folding arm, the fire truck can easily cope with fire fighting and rescue tasks at different heights, angles and complex environments. The combination of the telescopic function of the telescopic arm and the folding flexibility of the folding arm greatly expands the operating range of the fire truck and improves the efficiency of fire fighting and rescue. The fluid pipe and the liquid supply pipe passing through the folding telescopic boom structure are fluidically connected through a return elbow. This design ensures that when the fire truck is performing a task, no matter how the boom rotates, the water source can be stably and smoothly delivered to the required location. This not only improves the reliability of the fire truck, but also ensures the continuity and effectiveness of firefighting operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1 It is a schematic structural diagram of the fire truck provided by the utility model.

[0025] Figure 2 It is a schematic structural diagram of the folding arm and the telescopic arm provided by the utility model.

[0026] Figure 3 It is a schematic side view of the telescopic arm and fire monitor provided by the utility model.

[0027] Figure 4 It is a schematic cross-sectional view of the telescopic arm and fire monitor provided by the utility model.

[0028] Figure 5 It is a schematic three-dimensional diagram of the telescopic arm and fire monitor provided by the utility model.

[0029] Figure 6 It is a schematic structural diagram of the outer sleeve provided by the utility model.

[0030] Figure 7 It is a schematic cross-sectional view of the outer sleeve and the fluid tube provided by the utility model.

[0031] Figure 8 It is a schematic cross-sectional view of the guide mechanism between the outer sleeve and the fluid tube provided by the utility model.

[0032] Figure 9 It is a schematic cross-sectional view of the connection position of the folding arm and the telescopic arm provided by the utility model.

[0033] Reference numerals:

[0034] 100. Folding arm; 102. Hinge hole; 104. Telescopic arm; 106. Fluid pipe; 108. Liquid supply pipe; 110. Return elbow; 112. Outer sleeve; 114. Telescopic tube; 116. Guide groove; 118. Guide rail; 120. First control port; 122. Second control port; 124. Extension chamber; 126. Retraction chamber; 128. Fire monitor; 130. Cable reel; 132. Water monitor cable; 134. Cable seat; 136. First elbow; 138. Second elbow; 140. Clamp; 142. Boom length adjustment assembly; 144. Vehicle body. DETAILED DESCRIPTION

[0035] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0036] like Figures 1 to 9 As shown, the first embodiment of the present invention provides a foldable telescopic boom structure, comprising:

[0037] A folding arm 100, wherein a hinge hole 102 is provided at a first end of the folding arm 100;

[0038] The telescopic arm 104 has a fluid tube passing through it, and a liquid supply tube 108 is provided in the hinge hole 102. The telescopic arm 104 is hinged to the hinge hole 102 through the liquid supply tube 108. A return elbow 110 is rotatably provided at one end of the liquid supply tube 108, and the fluid tube is in fluid communication with the liquid supply tube 108 through the return elbow 110.

[0039] The foldable telescopic boom structure provided by the first embodiment of the present invention utilizes a combined design of a foldable arm 100 and a telescopic arm 104, thereby reducing the space occupied by the structure and improving its flexibility. A hinge hole 102 is provided at the first end of the foldable arm 100, allowing the telescopic arm 104 to flexibly rotate about the hinge hole 102 to accommodate various angles and positions. A fluid supply pipe 108 is provided in the hinge hole 102, and the telescopic arm 104 is connected to the fluid supply pipe 108. A reversible elbow 110 connects the fluid pipe and the fluid supply pipe 108, allowing the fluid pipe running through the telescopic arm 104 to rotate relative to the fluid supply pipe 108. Regardless of how the telescopic arm 104 rotates, the fluid pipe itself remains untwisted, ensuring unimpeded water flow and providing a stable water supply for water-using equipment (such as fire monitors and fire guns). This resistance to twisting of the fluid pipe extends its service life and reduces maintenance costs. At the same time, the foldable telescopic boom structure can also withstand a larger workload, ensuring the durability and reliability of the foldable telescopic boom structure.

[0040] Please continue to see Figures 1 to 9 The folding telescopic arm structure provided in the embodiment of the first aspect of the present invention mainly includes two parts: a folding arm 100 and a telescopic arm 104.

[0041] The folding arm 100 serves as the main support component of the folding telescopic boom structure. It has a sufficient length and strength to support the telescopic arm 104 and other potentially mounted devices. A hinge hole 102 is provided at the first end of the folding arm 100. This hinge hole 102 is used to connect to the telescopic arm 104 and allows the telescopic arm 104 to rotate or swing around it.

[0042] In an embodiment of the present invention, a plurality of folding arms 100 may be provided, and the plurality of folding arms 100 are hinged to each other. Two adjacent folding arms 100 may be connected via an amplitude adjustment assembly 142, thereby adjusting the relative angle between the two adjacent folding arms 100.

[0043] Similarly, a variable amplitude assembly 142 may also be provided between the folding arm 100 and the telescopic arm 104 .

[0044] like Figure 1 As shown, by arranging the amplitude variation assembly 142 between the folding arm 100 and the telescopic arm 104 , the telescopic plate can also be rotated relative to the folding arm 100 .

[0045] The telescopic arm 104 is an arm-like structure that can be telescopically adjusted along its length. A fluid pipe is provided inside the telescopic arm 104 for transporting water or other fluid media to water-using equipment (such as fire monitors, fire guns, etc.).

[0046] A liquid supply pipe 108 is installed in the hinge hole 102 of the foldable arm 100. This pipe not only connects the telescopic arm 104 to the foldable arm 100 but also transports fluid and supports the telescopic arm 104. The pipe 108 is fixed in the hinge hole 102, and a pivot elbow 110 is rotatably mounted on one end of the pipe. The design of the pivot elbow 110 ensures that the fluid pipe remains in fluid communication with the pipe 108 even when the telescopic arm 104 rotates around it, ensuring continuous and stable fluid transmission.

[0047] In an embodiment of the present invention, by combining the liquid supply pipe 108 with the hinge hole 102, a compact design of the folding telescopic arm structure is achieved. At the same time, the liquid supply pipe 108 and the folding arm 100 jointly assume the supporting role of the telescopic arm 104. This design not only reduces the number of components, but also improves the integration of the entire folding telescopic arm structure, making it lighter, easier to install and maintain. More importantly, the application of the return elbow 110 allows the fluid pipe to maintain relative rotation with the liquid supply pipe 108 when the telescopic arm 104 rotates, thereby avoiding twisting of the fluid pipe itself and ensuring the stability and reliability of fluid transmission. Even under complex and changeable working conditions, it can ensure that water or other fluid media can be smoothly transported to the designated location.

[0048] According to an embodiment of the present invention, a first elbow 136 is provided on the return elbow 110 , and a second elbow 138 is provided on the fluid pipe. The first elbow 136 and the second elbow 138 are adapted to be connected via a clamp 140 .

[0049] like Figure 9 As shown, in a specific embodiment of the present invention, in order to enhance the flexibility and connection reliability of the telescopic arm 104, a return elbow 110 is provided on the first elbow 136, and a second elbow 138 is provided on the fluid pipe, and the two are connected by a clamp 140.

[0050] As part of the return elbow 110, first elbow 136 has a specific bend angle and shape to accommodate specific turning requirements. Second elbow 138, provided on the fluid pipe, must match the shape and dimensions of first elbow 136 to ensure a tight connection. Second elbow 138 must also meet fluid dynamics requirements to ensure a stable flow of fluid.

[0051] The first elbow 136 and the second elbow 138 are connected by a clamp 140. The clamp 140 can be tightly clamped around the outer circumference of the first elbow 136 and the second elbow 138, thereby achieving a secure connection. This connection method is not only simple and easy to use, but also has high sealing and reliability. The use of the clamp 140 connection method ensures a tight connection between the first elbow 136 and the second elbow 138, preventing fluid leakage and loosening. This reliable connection method helps to improve the overall stability and safety of the telescopic arm 104.

[0052] According to one embodiment of the present invention, the telescopic arm 104 includes:

[0053] An outer sleeve 112, through which the fluid tube is passed;

[0054] The telescopic tube 114 is adapted to pass through the outer sleeve 112 through the guide mechanism portion and be in fluid communication with the fluid tube.

[0055] like Figure 7 As shown, in a specific embodiment of the present invention, the telescopic arm 104 mainly includes two parts: an outer sleeve 112 and a telescopic tube 114 .

[0056] The outer sleeve 112 is the outer structure of the telescopic arm 104 and has a certain strength and rigidity for supporting and protecting the internal fluid pipe. The fluid pipe is arranged inside the outer sleeve 112 and extends along the length of the outer sleeve 112 for conveying water or other fluid media.

[0057] The telescopic tube 114 is the core part of the telescopic arm 104. The telescopic tube 114 can telescope within the outer sleeve 112, thereby changing the overall length of the telescopic arm 104. In order to achieve the telescopic function and achieve accurate guidance, the telescopic tube 114 is partially inserted into the outer sleeve 112 through a guide mechanism.

[0058] By installing a telescopic tube 114 within the outer sleeve 112 and utilizing a guide mechanism to achieve its telescopic function, the telescopic arm 104 can be adjusted in length to meet different operational requirements. This design not only improves the flexibility of the telescopic arm 104 but also enhances its adaptability to various working conditions. The fluid connection between the telescopic tube 114 and the fluid pipe ensures continuous fluid flow during the telescopic arm 104's extension and retraction process, preventing interruption or leakage due to length changes.

[0059] The combined design of the outer sleeve 112 and the telescopic tube 114 makes the telescopic arm 104 more compact, reducing unnecessary components and weight. Furthermore, the use of a guide mechanism improves the smoothness and reliability of the telescopic operation, reducing the risk of failure. The relatively simple and modular design of the telescopic arm 104 facilitates maintenance and component replacement. For example, if the fluid tube or the telescopic tube 114 becomes damaged, they can be replaced individually without having to replace the entire telescopic arm 104.

[0060] According to one embodiment of the present invention, the telescopic arm 104 is an aluminum alloy telescopic arm 104 .

[0061] In a specific embodiment of the present invention, the telescopic arm 104 is made of aluminum alloy as the main structural material, forming an aluminum alloy telescopic arm 104. This choice is based on a series of excellent properties of aluminum alloy material, aiming to improve the overall performance of the telescopic arm 104, reduce weight and enhance durability.

[0062] The telescopic arm 104, constructed from aluminum alloy, is not only lightweight but also possesses high strength and rigidity, capable of withstanding significant pressure and impact. Furthermore, the corrosion resistance of aluminum alloy ensures a long service life in harsh environments. Compared to traditional materials, the aluminum alloy telescopic arm 104 is significantly lighter, which reduces energy consumption, increases flexibility, and reduces maintenance costs for equipment that requires frequent movement and operation.

[0063] According to one embodiment of the present invention, the guide mechanism includes:

[0064] a guide groove 116 provided in one of the telescopic tube 114 and the outer sleeve 112;

[0065] The guide rail 118 cooperates with the guide groove 116 for guidance, and is disposed on the other of the telescopic tube 114 and the outer sleeve 112 .

[0066] like Figure 8 As shown, in a specific embodiment of the present invention, the guide mechanism is designed in detail to include two parts: a guide groove 116 and a guide rail 118. These two parts are respectively arranged in the telescopic tube 114 and the outer sleeve 112 to achieve smooth and precise guidance of the telescopic tube 114 in the outer sleeve 112.

[0067] The guide groove 116 is provided in one of the telescopic tube 114 or the outer sleeve 112. The guide groove 116 can be a groove whose shape and size match the guide rail 118. The main function of the guide groove 116 is to provide a guide path so that the guide rail 118 can slide along it, thereby ensuring that the telescopic tube 114 maintains the correct direction and position during the telescopic process.

[0068] The guide rail 118 is a portion that cooperates with the guide groove 116 and is provided on the telescopic tube 114 or the outer sleeve 112 opposite the guide groove 116. The shape and size of the guide rail 118 closely match the guide groove 116 and can slide along the guide groove 116 when the telescopic tube 114 is extended or retracted.

[0069] The guiding cooperation of the guide groove 116 and the guide rail 118 ensures that the telescopic tube 114 always maintains the correct orientation and position during the telescopic operation, preventing instability caused by deviation or shaking. The design of the guide groove 116 and the guide rail 118 not only provides guidance but also enhances the overall structural strength of the telescopic arm 104. By supporting and restraining each other, the telescopic arm 104 is more stable and reliable when subjected to external forces. Furthermore, the guide groove 116 and the guide rail 118 reduce friction and impact during the telescopic operation, thereby reducing noise and wear. This helps extend the service life of the telescopic arm 104 and improve its operating efficiency.

[0070] Of course, in some other embodiments, the guide mechanism can also be a series of sliders or other forms of guide elements, which can only limit the movement trajectory of the telescopic tube 114, prevent it from deviating from the predetermined direction, and ensure the smoothness and reliability of the telescopic process.

[0071] According to one embodiment of the present utility model, a first control port 120 is provided at the first end of the outer sleeve 112, and a second control port 122 is provided at the second end of the outer sleeve 112. An extension cavity 124 and a retraction cavity 126 are formed in the outer sleeve 112. The first control port 120 is communicated with the extension cavity 124, and the second control port 122 is communicated with the retraction cavity 126. The telescopic tube 114 is sealedly connected to the extension cavity 124 and the retraction cavity 126.

[0072] like Figure 7 As shown, in a specific embodiment of the present invention, a first control port 120 and a second control port 122 are respectively provided at both ends of the outer sleeve 112 , and an extension cavity 124 and a retraction cavity 126 are formed inside the outer sleeve 112 .

[0073] Specifically, a first control port 120 and a second control port 122 are provided at the first and second ends of the outer sleeve 112, respectively. These two control ports can be connected to external hydraulic equipment. By inputting hydraulic oil into the first and second control ports 120, 122, the fluid in the telescopic tube 114 can be controlled, thereby driving the telescopic movement of the telescopic tube 114.

[0074] Inside the outer sleeve 112, two independent chambers, an extension chamber 124 and a retraction chamber 126, are formed according to the movement direction of the telescopic tube 114. The extension chamber 124 is located near the first control port 120. When hydraulic oil is introduced into the extension chamber 124, the telescopic tube 114 extends outward. The retraction chamber 126 is located near the second control port 122. When hydraulic oil is introduced into the retraction chamber 126, the telescopic tube 114 retracts inward.

[0075] The telescopic tube 114 is sealed against the extension chamber 124 and the retraction chamber 126 to prevent hydraulic fluid from leaking into the outer sleeve 112 or flowing from one chamber into another during the process of controlling the extension or retraction of the telescopic tube 114. This sealed connection can be achieved using sealing elements such as sealing rings and gaskets, which effectively prevent fluid leakage and maintain stable pressure within the chambers.

[0076] By supplying hydraulic oil to the first control port 120 or the second control port 122, the extension and retraction of the telescopic tube 114 can be precisely controlled. This control method is simple and reliable, and enables precise adjustment of the movement speed and position of the telescopic tube 114. The sealed connection between the telescopic tube 114 and the extension chamber 124 and retraction chamber 126 ensures that hydraulic oil does not leak during the control process, improving the overall sealing performance of the telescopic arm 104.

[0077] According to one embodiment of the present invention, a water-dispensing device, such as a fire monitor 128 , is provided at one end of the telescopic tube 114 extending out of the outer sleeve 112 .

[0078] like Figures 2 to 5 As shown, in one embodiment of the present invention, a fire monitor 128 is added to the end of the telescopic tube 114 that extends from the outer sleeve 112. The fire monitor 128 is directly mounted on the end of the telescopic tube 114 that extends from the outer sleeve 112. This allows the monitor 128 to move with the telescopic tube 114 as it retracts, thereby covering a wider firefighting area. The fire monitor 128 typically has an adjustable spray angle and range to accommodate varying firefighting needs.

[0079] To ensure the proper function of the fire monitor 128, the fluid pipe inside the telescopic arm 104 is connected to the water inlet of the fire monitor 128, forming a complete fluid delivery system. When the water pump or other pressure source is activated, water (or other fire extinguishing medium) flows along the fluid pipe to the fire monitor 128 and is ejected through its nozzle at high pressure and velocity to extinguish the fire.

[0080] By installing the fire monitor 128 at the end of the telescopic tube 114, the telescopic arm 104 not only has telescopic adjustment capabilities but also possesses powerful firefighting capabilities. This design significantly improves the firefighting efficiency and coverage of the fire truck, reducing firefighting time and manpower and material costs. Because the telescopic tube 114 can telescope within the outer sleeve 112, the spray position of the fire monitor 128 can also be flexibly adjusted. This flexibility enables the fire monitor 128 to easily respond to firefighting needs at various heights, angles, and in complex environments, increasing its applicability and practicality.

[0081] According to one embodiment of the present invention, a cable reel 130 is provided on the outer wall of the outer sleeve 112, and a water cannon cable is wound around the cable reel 130. At least one of the outer sleeve 112 and the telescopic tube 114 is provided with a cable seat 134, and the water cannon cable is connected to the water-using equipment by passing through the cable seat 134.

[0082] like Figure 3As shown, in one embodiment of the present invention, to further enhance the practicality and convenience of the telescopic arm 104, the outer wall of the outer sleeve 112 is designed to mount a cable reel 130, around which a water monitor cable is wound. Furthermore, at least one of the outer sleeve 112 and the telescopic tube 114 is provided with a cable seat 134, allowing the water monitor cable to pass around the cable seat 134 and connect to the fire monitor 128.

[0083] The cable reel 130 is mounted on the outer wall of the outer sleeve 112 for storing and releasing the monitor cable. This design allows the monitor cable to be neatly wound on the reel when not in use, avoiding the cable from being disorganized and possibly damaged.

[0084] To ensure the monitor cable can be smoothly routed and connected to the fire monitor 128, at least one of the outer sleeve 112 and the telescopic tube 114 is equipped with a cable seat 134. Cable seat 134 has a smooth surface and a suitable shape to reduce friction and resistance during the cable routing process. The location and number of cable seats 134 can be flexibly adjusted based on actual needs to ensure the cable can be smoothly connected along the intended route.

[0085] The design of the cable reel 130 and cable holder 134 facilitates the retraction, deployment, and connection of the monitor cable. Operators can easily control the length and routing of the cable, allowing for quick connection of the monitor 128 to the control system. Mounting the cable reel 130 on the outer wall of the outer casing 112 not only saves internal space but also allows for a more rational and aesthetically pleasing cable layout. This design helps optimize the overall structure and space efficiency of the telescopic arm 104.

[0086] like Figure 1 As shown, the second embodiment of the present invention provides a fire truck, including a vehicle body 144, on which the above-mentioned folding telescopic arm structure is installed.

[0087] According to the fire truck provided by the embodiment of the second aspect of the present utility model, since the folding telescopic boom structure integrates the telescopic arm 104 and the folding arm 100, the fire truck can easily cope with fire fighting and rescue tasks at different heights, angles and complex environments. The combination of the telescopic function of the telescopic arm 104 and the folding flexibility of the folding arm 100 greatly expands the operating range of the fire truck and improves the efficiency of fire fighting and rescue. The fluid pipe and the liquid supply pipe 108 passing through the folding telescopic boom structure are fluidically connected through the return elbow 110. This design ensures that when the fire truck is performing a task, no matter how the boom rotates, the water source can be stably and smoothly delivered to the required location. This not only improves the reliability of the fire truck, but also ensures the continuity and effectiveness of firefighting operations.

[0088] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A foldable telescopic boom structure, characterized in that: include: A folding arm (100), wherein a first end of the folding arm (100) is provided with a hinge hole (102); A telescopic arm (104) is provided with a fluid tube (106) passing through the telescopic arm (104), a liquid supply tube (108) is provided in the hinge hole (102), the telescopic arm (104) is hinged to the hinge hole (102) through the liquid supply tube (108), a reversing elbow (110) is rotatably provided at one end of the liquid supply tube (108), and the fluid tube (106) is in fluid communication with the liquid supply tube (108) through the reversing elbow (110).

2. The foldable telescopic arm structure according to claim 1, characterized in that: The telescopic arm (104) comprises: an outer sleeve (112), wherein the fluid pipe (106) is passed through the outer sleeve (112); The telescopic tube (114) is adapted to be partially passed through the outer sleeve (112) via a guide mechanism and to be in fluid communication with the fluid tube (106).

3. The foldable telescopic arm structure according to claim 2, characterized in that: The guiding mechanism comprises: a guide groove (116) provided in one of the telescopic tube (114) and the outer sleeve (112); A guide rail (118) is in guiding cooperation with the guide groove (116), and the guide rail (118) is provided on the other one of the telescopic tube (114) and the outer sleeve (112).

4. The foldable telescopic arm structure according to claim 2, characterized in that: The first end of the outer sleeve (112) is provided with a first control port (120), and the second end of the outer sleeve (112) is provided with a second control port (122). An extension cavity (124) and a retraction cavity (126) are formed in the outer sleeve (112). The first control port (120) is communicated with the extension cavity (124), and the second control port (122) is communicated with the retraction cavity (126). The telescopic tube (114) is sealedly connected to the extension cavity (124) and the retraction cavity (126).

5. The foldable telescopic boom structure according to claim 2, characterized in that: One end of the telescopic tube (114) extending out of the outer sleeve (112) is provided with a water-using device.

6. The foldable telescopic boom structure according to claim 5, characterized in that: The outer wall surface of the outer sleeve (112) is provided with a cable reel (130), and a water monitor cable (132) is wound around the cable reel (130). At least one of the outer sleeve (112) and the telescopic tube (114) is provided with a cable seat (134), and the water monitor cable (132) is connected to the water-using equipment by passing through the cable seat (134).

7. The foldable telescopic boom structure according to any one of claims 1 to 6, characterized in that: The return elbow (110) is provided with a first elbow (136), and the fluid pipe (106) is provided with a second elbow (138). The first elbow (136) and the second elbow (138) are suitable for being connected through a clamp (140).

8. The foldable telescopic boom structure according to any one of claims 1 to 6, characterized in that: The telescopic arm (104) is an aluminum alloy telescopic arm (104).

9. The foldable telescopic boom structure according to any one of claims 1 to 6, characterized in that: It also includes an amplitude changing assembly (142), which is connected between the folding arm (100) and the telescopic arm (104).

10. A fire truck, characterized in that: The vehicle comprises a vehicle body (144), on which a folding telescopic boom structure according to any one of claims 1 to 9 is installed.

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