Water supply and drainage vehicle and water supply and drainage device thereof

By adding flexible and telescopic hoses at the pipe connections of the drainage truck, assembly difficulties caused by assembly tolerances are solved, and the effect of simplifying installation and improving connection reliability is achieved.

CN223137285UActive Publication Date: 2025-07-22FUJIAN QIAOLONG EMERGENCY EQUIP CO LTD
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Patent Information

Application Number
CN202422610031.0
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-10-28
Publication Date
2025-07-22
Estimated Expiration
2034-10-28

AI Technical Summary

Technical Problem

Due to the assembly tolerances of the existing second pipe and the first and third pipes of the drainage truck, it is difficult to fully match, resulting in difficulty in assembly.

Method used

A flexible and telescopic hose is added between the water outlet of the second pipe and the water inlet of the third pipe, or a hose is added between the water inlet of the second pipe and the water outlet of the first pipe to make up for dimensional errors, simplify the installation process and improve connection reliability.

Benefits of technology

Through the flexibility and telescopicity of the hose, the installation process is simplified, the connection reliability is improved, the dimensional errors between different parts are adapted, and the operation difficulty is reduced.

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Abstract

The water supply and drainage vehicle comprises a first pipeline, a second pipeline, a third pipeline and a supporting mechanism, the first pipeline and the third pipeline are arranged up and down, the second pipeline is a bent pipe and is respectively communicated with a water outlet of the first pipeline and a water inlet of the third pipeline, and the supporting mechanism is connected with the first pipeline and the third pipeline. The supporting mechanism is used for supporting the first pipeline and the third pipeline, and is characterized by further comprising a hose, the water outlet of the second pipeline is communicated with the water inlet of the third pipeline through the hose, or the water inlet of the second pipeline is communicated with the water outlet of the first pipeline through the hose. A section of hose is additionally arranged between the water outlet of the second pipeline and the water inlet of the third pipeline. Similarly, a hose can be additionally arranged between the water inlet of the second pipeline and the water outlet of the first pipeline. The hose has certain flexibility and flexibility and can adapt to the size difference between different components.
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Description

Technical Field

[0001] The utility model relates to the field of emergency rescue, in particular to a water supply and drainage vehicle and its water supply and drainage device. Background Technique

[0002] In the field of emergency rescue, the water supply and drainage vehicle is an important piece of equipment. The water supply and drainage vehicle is usually equipped with a variety of pipes to achieve the liquid transfer from the water accumulation area to the designated discharge point. The existing water supply and drainage vehicle refers to Chinese Patent CN113350721B, which discloses a water intake system for a vehicle body, including a base, a water pump, a water intake pipe, a connecting pipe and a first water pipe assembly; the water intake pipe and the first water pipe assembly are arranged side by side on the base, the water inlet end of the water intake pipe and the water outlet end of the first water pipe assembly are arranged on the same side, the water outlet end of the water intake pipe and the water inlet end of the first water pipe assembly are arranged on the same side, the water pump is arranged at the water inlet of the water intake pipe, the water outlet end of the water intake pipe is detachably connected to one end of the connecting pipe, the other end of the connecting pipe is detachably connected to the water inlet end of the first water pipe assembly, and the water outlet end of the first water pipe assembly is used for connecting a water intake device or a water pipe.

[0003] The above patent has the following technical problems:

[0004] The second pipe, as the transition part between the first pipe and the third pipe, is detachable. Due to the existence of dimensional tolerances, it may cause the second pipe not to fully match the first pipe or the third pipe, which will increase the difficulty of assembly. Summary of the Utility Model

[0005] Therefore, it is necessary to provide a water supply and drainage vehicle and its water supply and drainage device to solve the problem that in the existing water supply and drainage device, the second pipe, as the transition part between the first pipe and the third pipe, is detachable. Due to the existence of assembly tolerances, it may cause the second pipe not to fully match the first pipe or the third pipe, which will increase the difficulty of assembly.

[0006] To achieve the above object, the present embodiment provides a water supply and drainage device, including a first pipe, a second pipe, a third pipe and a support mechanism. The first pipe and the third pipe are arranged up and down. The second pipe is a bent pipe and respectively communicates with the water outlet of the first pipe and the water inlet of the third pipe. The support mechanism is used to support the first pipe and the third pipe. The device further includes a hose. The water outlet of the second pipe communicates with the water inlet of the third pipe through the hose, or the water inlet of the second pipe communicates with the water outlet of the first pipe through the hose.

[0007] Further, the second pipe includes a first connecting pipe and a second connecting pipe which are symmetrically arranged. The first connecting pipe communicates with the second connecting pipe. One end port of the first connecting pipe away from the second connecting pipe serves as the water inlet of the second pipe, and one end port of the second connecting pipe away from the first connecting pipe serves as the water outlet of the second pipe.

[0008] Further, the first connecting pipe and the second connecting pipe are arc-shaped pipes. After being connected, they form a U-shaped shape. The first pipe is parallel to the third pipe.

[0009] Further, a handle is provided on the first connecting pipe and / or the second connecting pipe.

[0010] Further, a water-breaking valve is further included. The water-breaking valve is provided on the first pipe or the second pipe.

[0011] Further, when the water outlet of the second pipe communicates with the water inlet of the third pipe through the hose, the first pipe, the second pipe, the second pipe and the hose, and the hose and the third pipe are respectively connected and communicated through quick-connect joints;

[0012] When the water inlet of the second pipe communicates with the water outlet of the first pipe through the hose, the first pipe and the hose, the hose and the second pipe, and the second pipe and the third pipe are respectively connected and communicated through quick-connect joints.

[0013] Further, the quick-connect joint is a rotary joint.

[0014] Further, the hose is a fire hose.

[0015] Further, the support mechanism includes a support frame and a sliding frame. The sliding frame is slidably provided on the support frame and is located above the support frame. The first pipe is a multi-stage telescopic pipe, and one stage of the telescopic pipe is slidably provided on the sliding frame. The third pipe is provided on the support frame and is located below the support frame.

[0016] To achieve the above object, the present embodiment further provides a water supply and drainage vehicle, including the water supply and drainage device described in any one of the above embodiments. A water pump is provided at the water inlet of the first pipe of the water supply and drainage device.

[0017] Different from the prior art, the above technical solution has the following beneficial effects:

[0018] To overcome the installation difficulties caused by dimensional tolerances, a flexible hose is added between the water outlet of the second pipe and the water inlet of the third pipe in this application. Similarly, a flexible hose can also be added between the water inlet of the second pipe and the water outlet of the first pipe. The flexible hose has a certain degree of flexibility and stretchability, which can compensate for the dimensional errors between different components, thus simplifying the installation process and improving the reliability of the connection. Description of the Drawings

[0019] Figure 1 Is the front view of the water supply and drainage device in this embodiment;

[0020] Figure 2 Is the cross-sectional view of a part of the water supply and drainage device in this embodiment;

[0021] Figure 3 Is the exploded view of the first connecting pipe and the second connecting pipe in this embodiment;

[0022] Figure 4 Is Figure 2 The enlarged view of part A in

[0023] Figure 5 Is the perspective view of the first pipe and the support mechanism in this embodiment.

[0024] Description of the Reference Numerals:

[0025] 1. First pipe;

[0026] 2. Second pipe; 21. First connecting pipe; 22. Second connecting pipe; 23. Handle;

[0027] 3. Third pipe;

[0028] 4. Quick-connect fitting;

[0029] 5. Water pump;

[0030] 6. Support mechanism; 61. Support frame; 62. Sliding frame; 63. Pulley chute assembly;

[0031] 7. Flexible hose;

[0032] 8. Water-breaking valve. Detailed Embodiments

[0033] To illustrate in detail the possible application scenarios, technical principles, specific implementable solutions, achievable objectives and effects of this application, the following will be described in detail with reference to the specific embodiments listed and in conjunction with the drawings. The embodiments described herein are only used to more clearly illustrate the technical solutions of this application, so they are only examples and cannot be used to limit the protection scope of this application.

[0034] References to "embodiments" in this application mean that the specific features, structures, or characteristics described in connection with the embodiments can be included in at least one embodiment of the present application. The term "embodiment" appearing at various positions in the specification does not necessarily refer to the same embodiment, nor does it particularly limit its independence or relevance to other embodiments. In principle, in the present 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.

[0035] Unless otherwise defined, the meanings of the technical terms used in this application are the same as those commonly understood by those skilled in the technical field to which this application belongs; the use of the relevant terms in this application is only for describing specific embodiments and is not intended to limit this application.

[0036] In the description of this application, the phrase "and / or" is an expression used to describe the logical relationship between objects, indicating that there can be three relationships. For example, A and / or B means: there is A, there is B, and there is both A and B at the same time. In addition, the character " / " in this application generally represents an "or" logical relationship between the associated objects before and after.

[0037] In this application, terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual quantitative, primary-secondary, or sequential relationships between these entities or operations.

[0038] Without further limitations, in this application, the expressions "including", "comprising", "having", or other similar expressions used in the statements are intended to cover non-exclusive inclusion. These expressions do not exclude the possibility that there may be additional elements in the process, method, or product including the said elements, so that the process, method, or product including a series of elements may not only include those defined elements, but also include other elements not explicitly listed, or also include elements inherent to such process, method, or product.

[0039] Similar to the understanding in the "Examination Guidelines", in this application, expressions such as "greater than", "less than", "exceeding", etc. are understood not to include the number itself; expressions such as "above", "below", "within", etc. are understood to include the number itself. In addition, in the description of the embodiments of this application, the meaning of "multiple" is two or more (including two), and similar expressions related to "many" are also understood in this way, such as "multiple groups", "multiple times", etc., unless otherwise specifically defined.

[0040] In the description of the embodiments of the present application, the spatial-related expressions used, such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "perpendicular", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the specific embodiments or the drawings. It is only for the convenience of describing the specific embodiments of the present application or facilitating the understanding of the readers, rather than indicating or implying 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, it should not be construed as a limitation to the embodiments of the present application.

[0041] Unless otherwise clearly specified or limited, in the description of the embodiments of the present application, the terms such as "installed", "connected", "joined", "fixed", "set" should be understood in a broad sense. For example, the "connection" can be a fixed connection, a detachable connection, or an integral setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be directly connected, or indirectly connected through an intermediate medium; it can be the communication inside two elements or the interaction relationship between two elements. For those skilled in the art to which the present application pertains, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0042] Please refer to Figures 1 to 5 , this embodiment provides a water supply and drainage device, including a first pipe 1, a second pipe 2, a third pipe 3, and a support mechanism 6. The first pipe 1 and the third pipe 3 are arranged vertically. The second pipe 2 is a bent pipe and communicates with the water outlet of the first pipe 1 and the water inlet of the third pipe 3 respectively. The support mechanism 6 is used to support the first pipe 1 and the third pipe 3. The water supply and drainage device further includes a hose 7. The water outlet of the second pipe 2 is connected to the water inlet of the third pipe 3 through the hose 7, and the structure is as Figure 1 and Figure 2 shown, or the water inlet of the second pipe 2 is connected to the water outlet of the first pipe 1 through the hose 7.

[0043] The first pipe 1 and the third pipe 3 are arranged vertically. Preferably, they are arranged in parallel. This arrangement helps the water flow smoothly from the first pipe 1 to the third pipe 3. However, in practical applications, due to assembly problems, the first pipe 1 and the third pipe 3 may be slightly inclined. Such a technical solution also falls within the protection scope of the present application. In some embodiments, the first pipe 1 and the third pipe 3 are designed to be inclined at the beginning, such as forming large angles of 30 degrees, 40 degrees, or 60 degrees.

[0044] The support mechanism 6 stably positions the first pipe 1 and the third pipe 3 in place. The water outlet of the second pipe 2 is connected to the water inlet of the third pipe 3 through a hose 7, or the water inlet of the second pipe 2 is connected to the water outlet of the first pipe 1, so that the first pipe 1, the second pipe 2, the third pipe 3, and the hose 7 form a water supply and drainage pipeline.

[0045] To overcome the installation difficulties caused by dimensional tolerances, a section of hose 7 is added between the water outlet of the second pipe 2 and the water inlet of the third pipe 3 in this application. Similarly, a hose 7 can also be selected to be added between the water inlet of the second pipe 2 and the water outlet of the first pipe 1. The hose 7 has a certain flexibility and stretchability, which can compensate for the dimensional errors between different components, thus simplifying the installation process and improving the reliability of the connection.

[0046] In this embodiment, the second pipe 2 is detachable, which means that it can be selected whether to install the second pipe 2 according to actual needs. This design provides two drainage modes:

[0047] Please refer to Figure 1 , Mode 1 (installing the second pipe 2): When the second pipe 2 is installed in place, the water flow enters the water inlet of the second pipe 2 from the first pipe 1 (i.e., the end of the first connecting pipe 21 away from the second connecting pipe 22), then flows through the communicating part between the first connecting pipe 21 and the second connecting pipe 22, flows to the second connecting pipe 22, and finally enters the third pipe 3 through the hose 7 and is discharged, and the hose 7 is also passed through during this period.

[0048] Mode 2 (removing the second pipe 2): When the second pipe 2 is removed, the water flow will not enter the second pipe 2 and the third pipe 3. At this time, the water flow can be handled in other ways, such as using a water belt for drainage.

[0049] Please refer to Figures 1 to 3 , in this embodiment, the second pipe 2 includes a first connecting pipe 21 and a second connecting pipe 22 that are symmetrically arranged. The first connecting pipe 21 and the second connecting pipe 22 are connected and communicate with each other. The end port of the first connecting pipe 21 away from the second connecting pipe 22 serves as the water inlet of the second pipe 2, and the end port of the second connecting pipe 22 away from the first connecting pipe 21 serves as the water outlet of the second pipe 2. That is, when the water outlet of the second pipe 2 is connected to the water inlet of the third pipe 3 through the hose 7, the water outlet of the second connecting pipe 22 is connected to the water inlet of the third pipe 3 through the hose 7, and the structure is as Figures 1 to 3 shown; when the water inlet of the second pipe 2 is connected to the water outlet of the first pipe 1 through the hose 7, the water inlet of the first connecting pipe 21 is connected to the water outlet of the first pipe 1 through the hose 7.

[0050] The second pipeline 2 is designed to be detachable. One purpose is to adapt to different working scenarios and requirements, and the other purpose is to save costs and floor space. When the segmented second pipeline 2 retains the first connecting pipe 21 connected (directly or indirectly) to the first pipeline 1, it can be used to direct water in other directions. For example, in specific situations such as deep well drainage, the first pipeline 1 can be lifted to make it vertical, and the first connecting pipe 21 can be installed on the first pipeline 1 in a different direction (such as rotated 180°), with the bent first connecting pipe 21 facing backward, so as to change the direction of the water flow to meet the requirements of underground drainage, deep pit drainage or other special terrains. Compared with the second pipeline 2 without a segmented design, such a structure can achieve dual use of one object and is more cost-effective.

[0051] Please refer to Figures 1 to 3 , in this embodiment, the first connecting pipe 21 and the second connecting pipe 22 are arc-shaped pipes, presenting a shape bent at 90°, and after being connected, they form a U-shaped shape. The first pipeline 1 is parallel to the third pipeline 3, and the first pipeline 1, the second pipeline 2, and the third pipeline 3 also form a U-shaped shape.

[0052] Please refer to Figure 3 , in this embodiment, handles 23 are provided on the first connecting pipe 21 and / or the second connecting pipe 22. These handles 23 can be annular handles 23, hook-shaped handles 23 or other forms of grasping structures fixed on the outer wall of the pipeline. The design of the handles 23 is to facilitate the operator to operate more conveniently when installing, disassembling and carrying the second pipeline 2. When it is necessary to install or disassemble the second pipeline 2, the operator can easily operate through the handles 23 provided on the first connecting pipe 21 and / or the second connecting pipe 22. The handles 23 provide stable grasping points, reducing the risk of accidental injury caused by the operator slipping or being unable to grasp firmly, especially in a wet or complex working environment.

[0053] Please refer to Figures 1 to 4 , in this embodiment, the water supply and drainage device further includes a water breaking valve 8, and the water breaking valve 8 is provided on the first pipeline 1 or the second pipeline 2. During installation, the water breaking valve 8 is installed at a higher position on the first pipeline 1 or the second pipeline 2. Figures 1 to 4 As shown, the water breaking valve 8 is installed on the upper part of the first connecting pipe 21. The function of the water breaking valve 8 is to automatically open when the system pressure exceeds the preset safety value, quickly release the pressure in the pipeline, so as to prevent the hose 7 from being sucked into the pipeline due to excessive pressure, and thus play a role in protecting the hose 7.

[0054] In this embodiment, the detachable connection between the first pipeline 1, the second pipeline 2, the third pipeline 3, and the hose 7 is achieved through the quick-connect fitting 4. The design of the quick-connect fitting 4 makes the connection and disconnection operations between the pipelines very rapid and convenient, greatly reducing the installation and disassembly time. Since there are two cases for the installation position of the hose 7, the following explanations are made according to these two cases:

[0055] Please refer to Figure 1 and Figure 2 , when the water outlet of the second pipeline 2 is connected to the water inlet of the third pipeline 3 through the hose 7, the first pipeline 1 is connected to the second pipeline 2, the second pipeline 2 is connected to the hose 7, and the hose 7 is connected to the third pipeline 3 respectively through the quick-connect fitting 4. The quick-connect fitting 4 will be preset on each pipeline during manufacturing or installation. The water outlet of the first pipeline 1 and the water inlet of the second pipeline 2 have matching connectors. The water outlet of the second pipeline 2 and the water inlet of the hose 7 have matching connectors. The water outlet of the hose 7 and the water inlet of the third pipeline 3 have matching connectors;

[0056] When the water inlet of the second pipeline 2 is connected to the water outlet of the first pipeline 1 through the hose 7, the first pipeline 1 is connected to the hose 7, the hose 7 is connected to the second pipeline 2, and the second pipeline 2 is connected to the third pipeline 3 respectively through the quick-connect fitting 4. The quick-connect fitting 4 will be preset on each pipeline during manufacturing or installation. The water outlet of the first pipeline 1 and the water inlet of the hose 7 have matching connectors. The water outlet of the hose and the water inlet of the second pipeline 2 have matching connectors. The water outlet of the second pipeline 2 and the water inlet of the third pipeline 3 have matching connectors.

[0057] In this embodiment, the quick-connect fitting 4 is a rotary joint, a clamp joint, etc. Preferably, the rotary joint is selected as the quick-connect fitting 4. The rotary joint is such as a three-claw joint, a six-claw joint, a threaded rotary joint, etc. Preferably, in the actual use process, the above-mentioned several quick-connect fittings 4 are all of the same type and the same specification, which is convenient for procurement, cost control, and can also ensure interchangeability and operation consistency.

[0058] In some embodiments, the detachable connection between each pipeline is made by flange connection, and the disadvantage is that the disassembly of the flange is not as convenient as that of the quick-connect fitting 4.

[0059] Please refer to Figure 1 , in this embodiment, the hose 7 is a fire hose. The fire hose is usually made of wear-resistant materials and can resist wear during long-term use. The fire hose can withstand high-pressure water flow, so it can effectively cope with the high-pressure situation in the drainage system.

[0060] Please refer to Figure 1 and Figure 5, in this embodiment, the support mechanism includes a support frame 61 and a sliding frame 62. The sliding frame 62 is slidably arranged on the support frame 61 and is located above the support frame 61. The first pipeline 1 is a multi-stage telescopic pipe, and one of the telescopic pipes is slidably arranged on the sliding frame 62. The third pipeline 3 is arranged on the support frame 61 and is located below the support frame 61.

[0061] The sliding frame 62 is installed above the support frame 61 and can slide horizontally on the support frame 61. The design of the sliding frame 62 enables the height and position of the first pipeline 1 to be adjusted flexibly. The first pipeline 1 is designed as a multi-stage telescopic pipe and can be telescoped to adapt to different height requirements. One of the telescopic pipes of the first pipeline 1 is slidably arranged on the sliding frame 62. By moving the sliding frame 62 and telescoping the telescopic pipe, the height and position of the first pipeline 1 can be adjusted. The third pipeline 3 is fixed below the support frame 61 and has a relatively fixed position, responsible for discharging water flow to a predetermined position. It should be noted that when the first pipeline 1 is telescoping, the second pipeline 2 can be disassembled to avoid interference with each other. When the second pipeline 2 is installed in place, the telescopic pipe at the level where the water outlet of the first pipeline 1 is located does not move, but the other several telescopic pipes can telescope towards the water inlet to approach the water source. Since the first pipeline 1 is designed as a multi-stage telescopic pipe, it is preferable to arrange the hose 7 between the second pipeline 2 and the third pipeline 3.

[0062] Please refer to Figure 5 , in this embodiment, the sliding connections between the support frame 61 and the sliding frame 62, and between the sliding frame 62 and the first pipeline 1 can adopt a pulley and chute assembly 63.

[0063] Please refer to Figures 1 to 5 , this embodiment also provides a water supply and drainage vehicle, including the water supply and drainage device described in any one of the above embodiments. A water pump 5 is provided at the water inlet of the first pipeline 1 of the water supply and drainage device, and the water pump 5 can pump external water source into the first pipeline 1.

[0064] It should be noted that although the above embodiments have been described in this article, the patent protection scope of the present invention is not limited thereby. Therefore, based on the innovative concept of the present invention, any changes and modifications made to the embodiments described in this article, or equivalent structural or equivalent process transformations made by using the content of the specification and drawings of the present invention, and directly or indirectly applying the above technical solutions to other related technical fields, are all included in the patent protection scope of the present invention.

Claims

1. A water supply and drainage device, comprising a first pipe, a second pipe, a third pipe and a support mechanism. The first pipe and the third pipe are arranged vertically. The second pipe is a bent pipe and respectively communicates with the water outlet of the first pipe and the water inlet of the third pipe. The support mechanism is used to support the first pipe and the third pipe, and is characterized in that, It further includes a hose. The water outlet of the second pipe is connected to the water inlet of the third pipe through the hose, or the water inlet of the second pipe is connected to the water outlet of the first pipe through the hose.

2. The water supply and drainage device according to claim 1, characterized in that, The second pipe includes a first connecting pipe and a second connecting pipe which are symmetrically arranged. The first connecting pipe and the second connecting pipe are connected and communicated with each other. One end port of the first connecting pipe away from the second connecting pipe serves as the water inlet of the second pipe, and one end port of the second connecting pipe away from the first connecting pipe serves as the water outlet of the second pipe.

3. The water supply and drainage device according to claim 2, characterized in that, The first connecting pipe and the second connecting pipe are arc-shaped pipes. After being connected and communicated with each other, they form a U-shaped shape. The first pipe is parallel to the third pipe.

4. The water supply and drainage device according to claim 2, characterized in that, A handle is provided on the first connecting pipe and / or the second connecting pipe.

5. The water supply and drainage device according to any one of claims 1 to 4, characterized in that It further includes a water breaking valve, and the water breaking valve is provided on the first pipe or the second pipe.

6. The water supply and drainage device according to any one of claims 1 to 4, characterized in that When the water outlet of the second pipe is connected to the water inlet of the third pipe through the hose, the first pipe and the second pipe, the second pipe and the hose, and the hose and the third pipe are respectively connected and communicated through quick connectors. When the water inlet of the second pipe is connected to the water outlet of the first pipe through the hose, the first pipe and the hose, the hose and the second pipe, and the second pipe and the third pipe are respectively connected and communicated through quick connectors.

7. The water supply and drainage device according to claim 6, characterized in that, The quick connector is a rotary connector.

8. The water supply and drainage device according to claim 1, characterized in that, The hose is a fire hose.

9. The water supply and drainage device according to claim 1, characterized in that, The support mechanism includes a support frame and a sliding frame. The sliding frame is slidably arranged on the support frame and is located above the support frame. The first pipe is a multi-stage telescopic pipe, and one stage of the telescopic pipe is slidably arranged on the sliding frame. The third pipe is arranged on the support frame and is located below the support frame.

10. A water supply and drainage vehicle, characterized in that, It includes the water supply and drainage device according to any one of claims 1 to 9, and a water pump is provided at the water inlet of the first pipe of the water supply and drainage device.

Citation Information

Patent Citations

  • A water supply unit for vehicle body and water supply pump vehicle

    CN113350721B