Fire fighting truck and its hoistable water supply and discharge arm

Abstract

This utility model discloses a fire truck and its hoistable water supply and drainage boom, wherein the water supply and drainage boom includes: a multi-stage telescopic pipe; a lifting mechanism connected to the multi-stage telescopic pipe for adjusting the pitch of the multi-stage telescopic pipe; and a hoisting mechanism, the hoisting mechanism including a winch bracket, a winch, a pulley, a pulley bracket, and a hook. The winch bracket is mounted on the multi-stage telescopic pipe, the winch is mounted on the winch bracket, the pulley bracket is mounted on the multi-stage telescopic pipe, the pulley bracket is closer to the outlet direction of the multi-stage telescopic pipe than the winch, the pulley is mounted on the pulley bracket, the pulley allows the hoisting rope of the winch to pass over, and the hook is mounted on the end of the hoisting rope. The above technical solution integrates the multi-stage telescopic pipe and the hoisting mechanism into one unit, saving valuable vehicle space and making the structure more compact.

Description

Technical Field

[0001] This utility model relates to the field of emergency rescue, and in particular to a fire truck and its hoistable water supply and drainage boom. Background Technology

[0002] With the acceleration of urbanization, special vehicles such as drainage trucks and fire trucks are playing an increasingly important role in emergency rescue, municipal maintenance, and disaster response. These vehicles are typically equipped with specially designed booms for efficient and flexible water supply or drainage operations. Existing drainage trucks or fire trucks usually need to carry both a boom for water supply or drainage and a separate lifting mechanism when performing tasks, each occupying a certain amount of installation space, resulting in an increase in the overall size of the vehicle. Utility Model Content

[0003] Therefore, it is necessary to provide a fire truck and its hoistable water supply and drainage boom to solve the problem that the boom and hoisting mechanism each occupy a certain amount of installation space, resulting in a large overall vehicle size.

[0004] To achieve the above objectives, the inventors provide a hoistable water supply and drainage boom, comprising:

[0005] Multi-stage expansion joints; and

[0006] The hoisting mechanism includes a winch support, a winch, a pulley, a pulley support, and a hook. The winch support is mounted on the multi-stage telescopic pipe, the winch is mounted on the winch support, the pulley support is mounted on the multi-stage telescopic pipe, the pulley support is closer to the outlet direction of the multi-stage telescopic pipe than the winch, the pulley is mounted on the pulley support, the pulley is through which the hoisting rope of the winch passes, and the hook is mounted on the end of the hoisting rope.

[0007] Furthermore, the hoisting mechanism also includes a counterweight, which is located between the hook and the hoisting rope.

[0008] Furthermore: the multi-stage telescopic pipe includes an outer pipe and an inner pipe, the inner pipe being directly or indirectly slidably sleeved in the outer pipe, and the winch bracket and the pulley bracket are both located on the outer pipe.

[0009] Furthermore, it also includes a translation mechanism for sliding the outer tube and the inner tube relative to each other.

[0010] Furthermore: the translation mechanism includes a translation telescopic rod, which is located below the outer tube. Both the outer tube and the inner tube are provided with connecting plates below them. One end of the translation telescopic rod is connected to the connecting plate of the outer tube, and the other end of the translation telescopic rod is connected to the connecting plate of the inner tube.

[0011] Furthermore, the hoisting mechanism also includes a limiting structure, which is provided on the outer tube and located between the winch support and the pulley support. The limiting structure has a limiting space for the hoisting rope to pass through and supports the hoisting rope.

[0012] Furthermore: the limiting structure includes a limiting bracket and a rotating drum. The limiting bracket is disposed on the multi-stage telescopic tube and located between the winch bracket and the pulley bracket. The limiting bracket has a left side wall and a right side wall. The rotating drum is disposed on the left side wall and the right side wall of the limiting bracket and can rotate relative to the limiting bracket. The rotating drum supports the hoisting rope below the hoisting rope. A gap is left between the rotating drum and the upper limiting bracket as a limiting space.

[0013] Furthermore: the water supply and drainage boom is a fire boom, which also includes a fire monitor, the inlet of which is connected to the outlet of the multi-stage telescopic pipe.

[0014] Furthermore, it also includes lifting mechanisms and support components.

[0015] The lifting mechanism is connected to the multi-stage telescopic tube and is used to adjust the pitch of the multi-stage telescopic tube.

[0016] The support assembly includes a lower support cylinder, a left water supply pipe, and a right water supply pipe;

[0017] The multi-stage telescopic pipe includes an outer pipe, a lower support cylinder located below the outer pipe, a left outlet of the lower support cylinder connected to the inlet of the left water supply pipe, an outlet of the left water supply pipe connected to the left inlet of the outer pipe, a right outlet of the lower support cylinder connected to the inlet of the right water supply pipe, and an outlet of the right water supply pipe connected to the right inlet of the outer pipe.

[0018] The left inlet of the outer pipe can rotate relative to the outlet of the left water supply pipe, and the right inlet of the outer pipe can rotate relative to the outlet of the right water supply pipe; or, the inlet of the left water supply pipe can rotate relative to the left outlet of the lower support cylinder, and the inlet of the right water supply pipe can rotate relative to the right outlet of the lower support cylinder.

[0019] The support assembly is directly or indirectly connected to the lifting mechanism via the lower support cylinder.

[0020] To achieve the above objectives, the inventors also provide a fire truck, including a chassis, a slewing mechanism, and a water supply and drainage boom. The slewing mechanism is mounted on the chassis and supports the water supply and drainage boom, and is used to drive the water supply and drainage boom to rotate. The water supply and drainage boom is the hoistable water supply and drainage boom described in any of the above embodiments.

[0021] Unlike existing technologies, the above technical solution integrates multi-stage telescopic pipes and hoisting mechanisms into one unit, saving valuable vehicle space and making the structure more compact.

[0022] The above description of the utility model is merely an overview of the technical solution of this application. In order to enable those skilled in the art to better understand the technical solution of this application and to implement it based on the description and drawings, and to make the above-mentioned objectives and other objectives, features and advantages of this application easier to understand, the following description is provided in conjunction with the specific embodiments and drawings of this application. Attached Figure Description

[0023] The accompanying drawings are only used to illustrate the principles, implementation methods, applications, features, and effects of specific embodiments of this utility model and other related contents, and should not be considered as limitations on this application.

[0024] Figure 1 This is one of the schematic diagrams of the drainage boom in this application;

[0025] Figure 2 for Figure 1 Enlarged diagram of part A in the middle;

[0026] Figure 3 This is a schematic diagram of the hoisting mechanism in this application;

[0027] Figure 4 This is the second schematic diagram of the drainage boom in this application;

[0028] Figure 5 for Figure 1 Enlarged diagram of part B in the middle;

[0029] Figure 6 This is the third schematic diagram of the drainage boom in this application;

[0030] Figure 7 This is a schematic diagram of the fire truck in this application.

[0031] Explanation of reference numerals in the attached figures:

[0032] 1. Lower support cylinder; 11. Left outlet; 12. Right outlet;

[0033] 2. Left water supply pipe;

[0034] 3. Right water supply pipe;

[0035] 4. Multi-stage expansion joint; 41. Outer pipe; 42. Inner pipe; 43. Left inlet; 44. Right inlet;

[0036] 5. Fire monitor;

[0037] 6. Lifting mechanism; 61. Lifting telescopic rod;

[0038] 7. Slewing mechanism;

[0039] 8. Lifting mechanism; 81. Winch support; 82. Winch; 83. Pulley; 84. Pulley support; 85. Hook; 86. Counterweight; 87. Limiting bracket; 88. Rotary drum; 89. Lifting rope;

[0040] 9. Translation mechanism; 91. Translation telescopic rod; 92. Connecting plate;

[0041] 100. Chassis;

[0042] 110. Fire pump. Detailed Implementation

[0043] To illustrate the possible application scenarios, technical principles, implementable specific solutions, and achievable objectives and effects of this application in detail, the following description, in conjunction with the listed specific embodiments and accompanying drawings, provides a detailed explanation. The embodiments described herein are merely illustrative of the technical solutions of this application and are therefore intended to limit the scope of protection of this application.

[0044] In this document, the term "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The term "embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment, nor does it specifically limit its independence or connection with other embodiments. In principle, in this application, as long as there are no technical contradictions or conflicts, the technical features mentioned in each embodiment can be combined in any way to form corresponding implementable technical solutions.

[0045] Unless otherwise defined, the technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the use of related terms herein is merely for the purpose of describing particular embodiments and is not intended to limit this application.

[0046] In the description of this application, the term "and / or" is used to describe the logical relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A exists, B exists, and A and B exist simultaneously. Additionally, the character " / " in this document generally indicates that the preceding and following objects have an "or" logical relationship.

[0047] In this application, terms such as “first” and “second” are used only to distinguish one entity or operation from another, and do not necessarily require or imply any actual quantity, hierarchy or order relationship between these entities or operations.

[0048] Without further limitations, the use of terms such as “comprising,” “including,” “having,” or other similar open-ended expressions in this application is intended to cover non-exclusive inclusion, which does not exclude the presence of additional elements in a process, method, or product that includes the stated elements, such that a process, method, or product that includes a list of elements may include not only those defined elements but also other elements not expressly listed, or elements inherent to such a process, method, or product.

[0049] Similar to the understanding in the Examination Guidelines, in this application, expressions such as "greater than," "less than," and "exceeding" are understood to exclude the stated number; expressions such as "above," "below," and "within" are understood to include the stated number. Furthermore, in the description of the embodiments in this application, "multiple" means two or more (including two), and similar expressions related to "multiple" are also understood in this way, such as "multiple groups" and "multiple times," unless otherwise explicitly specified.

[0050] In the description of the embodiments of this application, the space-related expressions used, such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "vertical," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," indicate the orientation or positional relationship based on the orientation or positional relationship shown in the specific embodiments or drawings. They are only for the purpose of describing the specific embodiments of this application or for the reader's understanding, and do not indicate or imply that the device or component referred to must have a specific position, a specific orientation, or be constructed or operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0051] Unless otherwise expressly specified or limited, the terms "installation," "connection," "linking," "fixing," and "setting," as used in the description of the embodiments of this application, should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral arrangement; it can be a direct connection or an indirect connection through an intermediate medium; it can be a relationship of two components combined together, an interaction relationship between two components, or a connection within two structures. Those skilled in the art to which this application pertains can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0052] Please see Figures 1 to 7 This embodiment provides a hoistable water supply and drainage boom, including:

[0053] Multi-stage expansion joint 4;

[0054] The lifting mechanism 6, connected to the multi-stage telescopic tube 4, is used to adjust the pitch of the multi-stage telescopic tube 4; and

[0055] The hoisting mechanism 8 includes a winch support 81, a winch 82, a pulley 83, a pulley support 84, and a hook 85. The winch support 81 is mounted on the multi-stage telescopic pipe 4, the winch 82 is mounted on the winch support 81, the pulley support 84 is mounted on the multi-stage telescopic pipe 4, and the pulley support 84 is closer to the outlet direction of the multi-stage telescopic pipe 4 than the winch 82. The pulley 83 is mounted on the pulley support 84, and the hoisting rope 89 of the winch 82 passes around the pulley 83. The hook 85 is mounted on the end of the hoisting rope 89.

[0056] It should be noted that the multi-stage telescopic tube 4 is a component composed of multiple nested tubes, typically including an outer tube 41 and an inner tube 42. Each tube can slide and extend layer by layer to adapt to different working height or distance requirements. For ease of description, this article only uses a two-stage structure including an outer tube 41 and an inner tube 42 as an example, but this does not mean that the multi-stage telescopic tube 4 is limited to two stages. In fact, depending on the actual application scenario and performance requirements, this structure can be expanded into a three-stage, four-stage, five-stage, or even more-stage telescopic tube, all of which fall within the protection scope and technical concept of this application.

[0057] It should be noted that the lifting mechanism 6 can raise or lower the port (usually the outlet) of the multi-stage telescopic pipe 4, allowing it to face different directions to meet water supply or drainage needs. Typically, a hook 85 is installed near this port, and a winch 82 is installed at a distance.

[0058] It should be noted that the lifting device winds and unwinds the lifting rope 89 by driving the winch 82. The lifting and lowering operation of the hook 85 is achieved by controlling the length of the lifting rope 89. The lifting rope 89 can smoothly pass over the pulley 83, reducing friction between the lifting rope 89 and the winch 82. The hook 85 is used to lift heavy objects. The hook 85 may be designed with an anti-detachment structure to ensure that it will not accidentally fall off during the lifting process.

[0059] The above technical solution has the following beneficial effects: integrating the multi-stage telescopic tube 4 and the hoisting mechanism 8 into one unit saves valuable vehicle space and makes the structure more compact.

[0060] Please see Figures 1 to 3 In some embodiments, the lifting mechanism 8 further includes a counterweight 86 located between the hook 85 and the lifting rope 89 to ensure stability during the lifting process and avoid danger caused by the shift of the center of gravity.

[0061] Please see Figure 1 , Figure 2 and Figure 4In some embodiments, the multi-stage telescopic pipe 4 includes an outer pipe 41 and an inner pipe 42, with the inner pipe 42 slidably fitted directly or indirectly into the outer pipe 41. Preferably, a winch bracket 81 is mounted on the outer pipe 41, and a pulley bracket 84 is mounted on the outer pipe 41. The total length of the multi-stage telescopic pipe 4 is adjusted by controlling the sliding of the inner pipe 42 within the outer pipe 41, allowing the hook 85 to reach the lifting location without moving the vehicle. It should be noted that the outer pipe 41 and inner pipe 42 are relative concepts; the outer pipe 41 has a larger inner diameter, and the inner pipe 42 has a smaller inner diameter. In some embodiments, the winch bracket 81 can be mounted on the outer pipe 41, and the pulley brackets 84 can be mounted on the inner pipe 42. The pulley brackets 84 typically do not move with the inner pipe 42 into the outer pipe 41.

[0062] Please see Figure 1 and Figure 4 In some embodiments, the water supply and drainage boom also includes a translation mechanism 9, which is used to allow the outer pipe 41 and the inner pipe 42 to slide relative to each other. The translation mechanism 9 enables the multi-stage telescopic pipe 4 to extend and retract, and is a component for adjusting the length of the multi-stage telescopic pipe 4.

[0063] Please see Figure 1 and Figure 4 In some embodiments, the translation mechanism 9 includes a translation telescopic rod 91, which can be a hydraulic cylinder, pneumatic cylinder, or electric cylinder. The translation telescopic rod 91 is located below the outer tube 41. Connecting plates are provided below both the outer tube 41 and the inner tube 42. One end of the translation telescopic rod 91 is connected to the connecting plate of the outer tube 41, and the other end is connected to the connecting plate 92 of the inner tube 42. Typically, the outer tube 41 and the inner tube 42 are coaxially arranged, and the connecting plate is perpendicular to the axial direction of the outer tube 41 and the inner tube 42, ensuring that the direction of force transmission is consistent with the extension and retraction direction of the tube segment. The translation telescopic rod 91 is arranged along the axial direction of the outer tube 41 and the inner tube 42, and its extension and retraction action can directly drive the inner tube 42 to extend and retract inside the outer tube 41. This design allows the translation telescopic rod 91 to effectively push or pull the inner tube 42, realizing the length adjustment of the multi-stage telescopic tube 4.

[0064] It should be noted that the hoisting mechanism 8 and the translation mechanism 9 are circumferentially spaced to avoid interference between them during movement. For example, both the hoisting mechanism 8 and the translation mechanism 9 can be installed in the lower half of the multi-stage telescopic pipe 4, with the winch 82 and pulley 83 arranged diagonally below the center line of the outer pipe 41, while the connecting plate and the translation telescopic rod 91 are located directly below the center line of the outer pipe 41. Figure 1 and Figure 2 As shown, functional independence and coordinated movement are achieved through spatial misalignment. For example, the translation mechanism 9 can be set in the bottom area of ​​the multi-stage telescopic pipe 4, while the hoisting mechanism 8 is installed on the side of the multi-stage telescopic pipe 4, further realizing the structural separation layout.

[0065] Please see Figure 1 and Figure 5 In some embodiments, the hoisting mechanism 8 further includes a limiting structure, which is located on the outer tube 41 and between the winch support 81 and the pulley support 84. The limiting structure has a limiting space for the hoisting rope 89 to pass through and supports the hoisting rope 89. Since the multi-stage telescopic tube 4 is telescopic, the hoisting rope 89 may extend too far along the axial direction of the outer tube 41 during hoisting. One function of the limiting structure is to guide the hoisting rope 89, ensuring that the hoisting rope 89 maintains the correct path during operation. Another function is to support the hoisting rope 89, distributing and balancing the force borne by the hoisting rope 89 to a certain extent.

[0066] Please see Figure 5 In some embodiments, the limiting structure includes a limiting bracket 87 and a rotating drum 88. The limiting bracket 87 is mounted on the outer tube 41 and located between the winch bracket 81 and the pulley bracket 84. The limiting bracket 87 has a left side wall and a right side wall. The rotating drum 88 is mounted on the left side wall and the right side wall of the limiting bracket 87 and can rotate relative to the limiting bracket 87. The rotating drum 88 supports the lifting rope 89 below it, and a gap is left between the rotating drum 88 and the upper limiting bracket 87 as a limiting space. The left and right side walls of the limiting bracket 87 constrain the lifting rope 89. The rotating drum 88 is located below the lifting rope 89, directly contacting and supporting the lifting rope 89. When the lifting rope 89 moves during operation, the rotating drum 88 rotates accordingly, reducing friction between the lifting rope 89 and the limiting structure, extending the service life of the lifting rope 89, and ensuring that the lifting rope 89 always maintains appropriate tension.

[0067] Please see Figure 1 , Figure 4 and Figure 6 In some embodiments, the water supply and drainage boom is a fire-fighting boom, which also includes a fire monitor 5. The inlet of the fire monitor 5 is connected to the outlet of the multi-stage telescopic pipe 4. Typically, one end of the inner pipe 42 extending out of the outer pipe 41 serves as the outlet of the multi-stage telescopic pipe 4. The outlet of the inner pipe 42 is located at the end of the inner pipe 42 furthest from the outer pipe 41, while the inlet of the inner pipe 42 is always located inside the outer pipe 41. The fire monitor 5 is used to spray high-pressure water or other extinguishing agents for fire-fighting operations.

[0068] Please see Figure 4 and Figure 6 In some embodiments, the water supply and drainage boom further includes a support assembly, which includes a lower support cylinder 1, a left water supply pipe 2, and a right water supply pipe 3.

[0069] The lower support cylinder 1 is located below the outer pipe 41. The left outlet 11 of the lower support cylinder 1 is connected to the inlet of the left water supply pipe 2. The outlet of the left water supply pipe 2 is connected to the left inlet 43 of the outer pipe 41. The right outlet 12 of the lower support cylinder 1 is connected to the inlet of the right water supply pipe 3. The outlet of the right water supply pipe 3 is connected to the right inlet 44 of the outer pipe 41.

[0070] The left inlet 43 of the outer pipe 41 can rotate relative to the outlet of the left water pipe 2, and the right inlet 44 of the outer pipe 41 can rotate relative to the outlet of the right water pipe 3; or, the inlet of the left water pipe 2 can rotate relative to the left outlet 11 of the lower support cylinder 1, and the inlet of the right water pipe 3 can rotate relative to the right outlet 12 of the lower support cylinder 1.

[0071] The support assembly is directly or indirectly connected to the lifting mechanism 6 via the lower support cylinder 1.

[0072] The outer pipe 41 is located at the top, the left water supply pipe 2 and the right water supply pipe 3 are located in the middle, and the two are symmetrically arranged. The lower support cylinder 1 is located at the bottom. The water flow is sent from the external water source into the inlet of the lower support cylinder 1. Since the lower support cylinder 1 has two outlets, one flows out from the left outlet 11 of the lower support cylinder 1 and enters the inlet of the left water supply pipe 2. The other flows out from the right outlet 12 of the lower support cylinder 1 and enters the inlet of the right water supply pipe 3. The water flow is delivered through the left water supply pipe 2 to the left inlet 43 and the right inlet 44 of the outer pipe 41, and then flows into the interior of the outer pipe 41. The inlet of the inner pipe 42 can slide and extend in the outer pipe 41. The water flow is finally transmitted through the inner pipe 42 to its far end (i.e. the end away from the outer pipe 41) and discharged from the outlet of the inner pipe 42 for water supply, drainage or connection to the fire monitor 5.

[0073] The left water pipe 2 and the right water pipe 3 are symmetrically arranged on both sides (left and right sides) of the outer pipe 41. This symmetrical double pipe structure evenly distributes the support force that might have been concentrated on one side to the left and right sides of the boom, reducing the probability of structural deformation.

[0074] A direct connection between the lower support cylinder 1 and the lifting mechanism 6 means that one end of the lifting mechanism 6 is directly mounted on the mounting point provided on the lower support cylinder 1. An indirect connection means that the lifting mechanism 6 is connected to the lower support cylinder 1 through mounting points on other components that are fixedly connected to it. These components could be a slewing mechanism 7 that supports and drives the lower support cylinder 1 to rotate, or a chassis 100, rather than being directly connected to the lower support cylinder. In this case, the lower support cylinder is fixed to the slewing mechanism, and driving the slewing mechanism can push the multi-stage telescopic tube, the lifting telescopic rod, and the lower support cylinder to rotate together.

[0075] Please see Figure 1 , Figure 4 and Figure 6In some embodiments, the lifting mechanism 6 includes a lifting telescopic rod 61, which can be a hydraulic cylinder, pneumatic cylinder, or electric cylinder. One end of the rod is hinged to the side wall of the outer tube 41 via a hinged connection (such as a pin connection), while the other end can be directly or indirectly hinged to the lower support cylinder 1. The extension and retraction of the lifting telescopic rod 61 pushes the outer tube 41 to rise or fall around the rotation center, adjusting the pitch and aligning the outlet with a preset direction. Typically, there are two lifting telescopic rods 61, located on the left and right sides of the outer tube 41, extending and retracting synchronously to improve the smoothness of the boom movement and structural stability. In other embodiments, the lifting mechanism 6 can tilt the multi-stage telescopic tube 4 around the rotation point by suspending it.

[0076] Please see Figure 7 This embodiment also provides a fire truck, including a chassis 100, a slewing mechanism 7 and a water supply and drainage boom. The slewing mechanism 7 is mounted on the chassis 100 and supports the water supply and drainage boom, and is used to drive the water supply and drainage boom to rotate. The water supply and drainage boom is the hoistable water supply and drainage boom described in any of the above embodiments.

[0077] The slewing mechanism 7 is mounted on the chassis 100 and typically includes a slewing bearing (turntable bearing) and a slewing drive device (such as a geared motor, hydraulic motor, etc.). This mechanism can drive the upper water supply and drainage boom to rotate in the horizontal plane, achieving multi-directional operation coverage. Preferably, the lifting telescopic rod 61 supports the outer pipe 41 on the slewing mechanism 7, thereby allowing the multi-stage telescopic pipe 4 to pitch around the rotation point of the water supply pipe (inlet or outlet).

[0078] In this embodiment, a fire pump 110 is installed on the chassis 100 of the fire truck. The fire pump 110 pressurizes the water and sends it to the lower support cylinder 1, and finally sprays it out through the fire monitor 5.

[0079] Finally, it should be noted that although the above embodiments have been described in the text and drawings of this application, this should not limit the scope of patent protection of this application. Any technical solutions that are based on the essential concept of this application and utilize the content described in the text and drawings of this application, resulting in equivalent structural or procedural substitutions or modifications, as well as the direct or indirect application of the technical solutions of the above embodiments to other related technical fields, are all included within the scope of patent protection of this application.

Claims

1. A hoistable water supply and drainage boom, characterized in that, include: Multi-stage expansion joint; as well as The hoisting mechanism includes a winch support, a winch, a pulley, a pulley support, and a hook. The winch support is mounted on the multi-stage telescopic pipe, the winch is mounted on the winch support, the pulley support is mounted on the multi-stage telescopic pipe, the pulley support is closer to the outlet direction of the multi-stage telescopic pipe than the winch, the pulley is mounted on the pulley support, the pulley is through which the hoisting rope of the winch passes, and the hook is mounted on the end of the hoisting rope.

2. The water supply and drainage boom according to claim 1, characterized in that: The hoisting mechanism also includes a counterweight, which is located between the hook and the hoisting rope.

3. The water supply and drainage boom according to claim 1, characterized in that: The multi-stage telescopic pipe includes an outer pipe and an inner pipe. The inner pipe can be directly or indirectly slidably sleeved in the outer pipe. The winch bracket and the pulley bracket are both located on the outer pipe.

4. The water supply and drainage boom according to claim 3, characterized in that: It also includes a translation mechanism for sliding the outer tube and the inner tube relative to each other.

5. The water supply and drainage boom according to claim 4, characterized in that: The translation mechanism includes a translation telescopic rod located below the outer tube. Both the outer tube and the inner tube are provided with connecting plates below them. One end of the translation telescopic rod is connected to the connecting plate of the outer tube, and the other end of the translation telescopic rod is connected to the connecting plate of the inner tube.

6. The water supply and drainage boom according to claim 1, characterized in that: The hoisting mechanism also includes a limiting structure, which is provided on the multi-stage telescopic pipe and located between the winch support and the pulley support. The limiting structure has a limiting space for the hoisting rope to pass through and supports the hoisting rope.

7. The water supply and drainage boom according to claim 6, characterized in that: The multi-stage telescopic tube includes an outer tube and an inner tube, wherein the inner tube can be directly or indirectly slidably sleeved in the outer tube; The limiting structure includes a limiting bracket and a rotating drum. The limiting bracket is mounted on the outer tube and located between the winch bracket and the pulley bracket. The limiting bracket has a left side wall and a right side wall. The rotating drum is mounted on the left side wall and the right side wall of the limiting bracket and can rotate relative to the limiting bracket. The rotating drum supports the hoisting rope below the hoisting rope. A gap is left between the rotating drum and the upper limiting bracket as a limiting space.

8. The water supply and drainage boom according to claim 1, characterized in that: The water supply and drainage boom is a fire boom, which also includes a fire monitor. The inlet of the fire monitor is connected to the outlet of the multi-stage telescopic pipe.

9. The water supply and drainage boom according to claim 1 or 8, characterized in that: It also includes the lifting mechanism and support components. The lifting mechanism is connected to the multi-stage telescopic tube and is used to adjust the pitch of the multi-stage telescopic tube. The support assembly includes a lower support cylinder, a left water supply pipe, and a right water supply pipe; The multi-stage telescopic pipe includes an outer pipe, a lower support cylinder located below the outer pipe, a left outlet of the lower support cylinder connected to the inlet of the left water supply pipe, an outlet of the left water supply pipe connected to the left inlet of the outer pipe, a right outlet of the lower support cylinder connected to the inlet of the right water supply pipe, and an outlet of the right water supply pipe connected to the right inlet of the outer pipe. The left inlet of the outer pipe can rotate relative to the outlet of the left water supply pipe, and the right inlet of the outer pipe can rotate relative to the outlet of the right water supply pipe; or, the inlet of the left water supply pipe can rotate relative to the left outlet of the lower support cylinder, and the inlet of the right water supply pipe can rotate relative to the right outlet of the lower support cylinder. The support assembly is directly or indirectly connected to the lifting mechanism via the lower support cylinder.

10. A fire truck, characterized in that, It includes a chassis, a slewing mechanism, and a water supply and drainage boom. The slewing mechanism is mounted on the chassis and supports the water supply and drainage boom, and is used to drive the water supply and drainage boom to rotate. The water supply and drainage boom is a hoistable water supply and drainage boom as described in any one of claims 1 to 9.

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