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

Abstract

The utility model discloses a water supply and drainage vehicle and a water supply and drainage device thereof, and the water supply and drainage device comprises a multi-stage telescopic pipe which comprises a first pipeline and a second pipeline which can slide in a relatively telescopic manner; the telescopic mechanism is used for enabling the multi-stage telescopic pipe to stretch out and draw back; the sliding frame mechanism comprises a sliding frame and a supporting frame, the sliding frame is arranged on the supporting frame in a sliding mode and located above the supporting frame, the second pipeline is arranged on the sliding frame in a sliding mode, and the sliding direction of the second pipeline on the sliding frame is in the axial direction of the sliding frame; and one end of the locking mechanism is arranged on the first pipeline and keeps static with one end of the locking mechanism, and the other end of the locking mechanism is arranged on the supporting frame. The locking mechanism keeps supporting the first pipeline all the time, and when the end of the first pipeline is detachably connected with the bent pipe and water pumping is conducted, unnecessary movement or deformation of the first pipeline and the bent pipe due to water flow impact force or other external force influences can be avoided.

Description

Technical Field

[0001] The utility model relates to the field of drainage, in particular to a water supply and drainage vehicle and a water supply and drainage device thereof. Background Art

[0002] Water supply and drainage vehicles are versatile specialized vehicles that not only provide water for firefighting operations but also have drainage capabilities, enabling them to quickly remove accumulated water in emergencies and mitigate the impact of flooding. These vehicles are typically equipped with efficient water pump systems, retractable water pipes, and necessary auxiliary equipment to ensure effective operation in a variety of complex environments.

[0003] The applicant's previously filed Chinese patent application, CN216395110U, discloses a vehicle water supply system and a water pump truck. The water supply system includes a base, a water pump, a water supply pipe, a connecting pipe, and a first water pipe assembly. The water supply pipe and the first water pipe assembly are arranged side by side on the base. The water pump is located at the water inlet of the water supply pipe. The water outlet of the water supply pipe is detachably connected to one end of the connecting pipe, and the other end of the connecting pipe is detachably connected to the water inlet of the first water pipe assembly. The water outlet of the first water pipe assembly is connected to a water intake device. The water supply system has two water outlet modes, allowing for rapid extinguishing of nearby fires.

[0004] The applicant discovered the following problems during the use of the above-mentioned water supply pump truck: the water supply pipe is a multi-stage telescopic pipe, which is extended and retracted by a linear motion mechanism such as a cylinder or an oil cylinder. When necessary, a connecting pipe can be installed between the multi-stage telescopic pipe and the water supply pipe. The water pump pumps external water into the multi-stage telescopic pipe, which flows through the connecting pipe and the first water pipe assembly. During this period, the water flowing from the multi-stage telescopic pipe hits the inner wall of the elbow to form a reaction force. If this reaction force exceeds a certain threshold, under the impact of this reaction force, the linear motion mechanism such as the cylinder or the oil cylinder will contract uncontrollably, thereby driving the pipe level connected to the elbow in the multi-stage telescopic pipe to extend and retract, which will damage the connection between the multi-stage telescopic pipe and the elbow. Utility Model Content

[0005] Therefore, it is necessary to provide a water supply and drainage vehicle and a water supply and drainage device thereof to solve the problems raised in the background technology.

[0006] To achieve the above objectives, this embodiment provides a water supply and drainage device, comprising:

[0007] A multi-stage telescopic pipe, comprising a first pipe and a second pipe that can telescope and slide relative to each other;

[0008] a telescopic mechanism, the telescopic mechanism being used to extend and retract the multi-stage telescopic tube;

[0009] a slide mechanism, the slide mechanism comprising a slide frame and a support frame, the slide frame being slidably disposed on the support frame and located above the support frame, the second pipe being slidably disposed on the slide frame, and the sliding direction of the second pipe on the slide frame being along the axial direction thereof; and

[0010] A locking mechanism, one end of which is arranged on the first pipe and remains stationary with the one end of the locking mechanism, and the other end is arranged on the support frame.

[0011] Furthermore, the locking mechanism includes a connector and a bracket, one end of the connector is provided on the first pipe, the other end of the connector is provided on one end of the bracket, and the other end of the bracket has two connection structures respectively connected to the locking mechanism.

[0012] Furthermore, one end of the connecting member close to the first pipe is arc-shaped and connected to the first pipe, and the width of the connecting member gradually decreases from the one end close to the first pipe to the other end.

[0013] Furthermore, the connecting piece is welded to the first pipe, and the arc length is greater than or equal to one quarter of the circumference of the first pipe.

[0014] Furthermore, the bracket includes a front vertical end plate, a first diagonal brace, a rear horizontal end plate, a second diagonal brace and a rear vertical end plate;

[0015] The front vertical end plate is connected to the rear surface of an end of the connecting member away from the first pipe by bolts, the first diagonal brace and the second diagonal brace extend rearward from the rear surface of the front vertical end plate, the first diagonal brace is inclined to the rear of the second diagonal brace, the rear surface of the front vertical end plate is connected to the upper surface of the rear horizontal end plate through the first diagonal brace, the rear surface of the front vertical end plate is connected to the front surface of the rear vertical end plate through the second diagonal brace, the rear horizontal end plate is one of the connecting structures and is connected to the support frame by bolts, and the rear vertical end plate is another of the connecting structures and is connected to the support frame by bolts.

[0016] Furthermore, the first diagonal brace, the second diagonal brace, and the front vertical end plate are integrally formed, and the first diagonal brace and / or the second diagonal brace are provided with reinforcing ribs.

[0017] Furthermore, the telescopic mechanism includes a telescopic rod, which is an oil cylinder or an air cylinder. One end of the telescopic rod is connected to the sliding frame through a first base, and the other end of the telescopic rod is connected to an end of the connecting member away from the first pipe through a second base. The telescopic direction of the telescopic rod is along the axial direction of the first pipe.

[0018] Furthermore, the multi-stage telescopic tube also includes a third pipe, a fourth pipe and a fifth pipe. The inner diameters of the first pipe, the third pipe and the second pipe increase successively. The first pipe is slidably sleeved on the front end of the third pipe, and the second pipe is slidably sleeved on the rear end of the third pipe. The inner diameters of the fifth pipe, the fourth pipe and the second pipe increase successively. The fourth pipe is slidably sleeved on the rear end of the second pipe, and the fifth pipe is slidably sleeved on the rear end of the fourth pipe.

[0019] Furthermore, it also includes a bend pipe and a water supply pipe, the water supply pipe is arranged on the bottom of the support frame, the water inlet of the bend pipe is detachably connected to the water outlet of the first pipe, and the water outlet of the bend pipe is detachably connected to the water inlet of the water supply pipe.

[0020] To achieve the above objectives, this embodiment further provides a water supply and drainage vehicle, comprising a chassis, wherein the chassis is provided with a water supply and drainage device as described in any one of the above embodiments, and the multi-stage telescopic pipes of the water supply and drainage device are provided with a water pump for pumping water.

[0021] Different from the existing technology, the above technical solution has the following beneficial effects:

[0022] The locking mechanism always maintains support for the first pipe. When the end of the first pipe is detachably connected to the elbow and water is pumped, unnecessary movement or deformation of the first pipe and the elbow due to water flow impact or other external forces can be avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A perspective view of a portion of the water supply and drainage device in this embodiment;

[0024] Figure 2 is a three-dimensional diagram of the bracket in this embodiment;

[0025] Figure 3 is a side view of the bracket and the connector in this embodiment;

[0026] Figure 4 Schematic diagram showing that the width of the connecting piece in this embodiment gradually decreases from one end close to the first pipe to the other end;

[0027] Figure 5 It is a three-dimensional diagram of the water supply and drainage device in this embodiment.

[0028] Description of reference numerals:

[0029] 1. Multi-stage telescopic tube;

[0030] 11. First pipeline; 12. Second pipeline; 13. Third pipeline; 14. Fifth pipeline;

[0031] 2. Sliding frame mechanism; 21. Sliding frame; 22. Support frame;

[0032] 3. Locking mechanism; 31. Connector; 32. Bracket; 321. Front vertical end plate; 322. First diagonal brace; 323. Rear horizontal end plate; 324. Second diagonal brace; 325. Rear vertical end plate; 326. Reinforcement rib;

[0033] 4. Telescopic mechanism; 41. Telescopic rod; 42. Second base;

[0034] 5. Bend pipe;

[0035] 6. Water supply pipeline;

[0036] 7. Water pump. DETAILED DESCRIPTION

[0037] In order to explain in detail the possible application scenarios, technical principles, specific solutions that can be implemented, and the purpose and effects of this application, the following is a detailed description of the specific embodiments listed in conjunction with the accompanying drawings. The embodiments described herein are only used to more clearly illustrate the technical solutions of this application and are therefore only examples and are not intended to limit the scope of protection of this application.

[0038] References to "embodiments" herein mean that the specific features, structures, or characteristics described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the word "embodiment" in various places 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 this application, as long as there are no technical contradictions or conflicts, the various technical features mentioned in the embodiments can be combined in any manner to form a corresponding implementable technical solution.

[0039] Unless otherwise defined, the technical terms used herein have the same meanings as those generally understood by those skilled in the art to which this application belongs; the use of relevant terms herein is only for describing specific embodiments and is not intended to limit this application.

[0040] In the description of this application, the term "and / or" is used to describe a logical relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A exists, B exists, and both A and B exist. In addition, the character " / " in this document generally indicates that the objects before and after are in a logical "or" relationship.

[0041] In this application, terms such as "first" and "second" are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual quantity, priority or sequence relationship between these entities or operations.

[0042] Without further limitations, in this application, the words "include", "comprise", "have" or other similar expressions used in the sentences are intended to cover non-exclusive inclusion. These expressions do not exclude the presence of additional elements in the process, method or product including the elements, so that the process, method or product including a series of elements may include not only those defined elements, but also other elements not explicitly listed, or elements inherent to such process, method or product.

[0043] Consistent with the understanding in the Examination Guidelines, in this application, expressions such as "greater than," "less than," and "exceed" are understood to exclude the number itself; expressions such as "above," "below," and "within" are understood to include the number itself. Furthermore, in the description of the embodiments of this application, "multiple" means more than two (including two), and similar expressions related to "multiple" are also understood in this manner, such as "multiple groups," "multiple times," etc., unless otherwise specifically defined.

[0044] In the description of the embodiments of the present application, the space-related expressions used, such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "vertical", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate the orientation or position relationship based on the orientation or position relationship shown in the specific embodiments or drawings, and are only for the convenience of describing the specific embodiments of the present application or facilitating 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, it should not be understood as a limitation on the embodiments of the present application.

[0045] Unless otherwise expressly specified or limited, in the description of the embodiments of the present application, the terms "installed", "connected", "connected", "fixed", "set", etc. used should be understood in a broad sense. For example, the "connection" can be a fixed connection, a detachable connection, or an integrated setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. For those skilled in the art of the present application, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0046] See also Figures 1 to 5 This embodiment provides a water supply and drainage device, including:

[0047] The multi-stage telescopic pipe 1 includes a first pipe 11 and a second pipe 12 that can slide telescopically relative to each other;

[0048] The telescopic mechanism 4 is used to extend and retract the multi-stage telescopic tube 1;

[0049] The slide mechanism 2 includes a slide frame 21 and a support frame 22. The slide frame 21 is slidably disposed on the support frame 22 and is located above the support frame 22. The second pipe 12 is slidably disposed on the slide frame 21. The sliding direction of the second pipe 12 on the slide frame 21 is along the axial direction thereof; and

[0050] The locking mechanism 3 has one end disposed on the first pipe 11 and remains stationary, and the other end is disposed on the support frame 22 .

[0051] When the water supply and drainage system is in use, the operating state of the multi-stage telescopic pipe 1 is controlled by operating the telescopic mechanism 4. To extend the pipe length, the telescopic mechanism 4 pushes the second pipe 12 to slide away from the first pipe 11, simultaneously causing the sliding frame 21 to move accordingly on the support frame 22. Conversely, to shorten the pipe length, the telescopic mechanism 4 pulls the second pipe 12 back. The locking mechanism 3 maintains support for the first pipe 11. When the end of the first pipe 11 is detachably connected to the elbow 5 for water pumping, it prevents the first pipe 11 and the elbow 5 from moving or deforming due to the impact of water flow or other external forces.

[0052] See also Figures 1 to 3 In this embodiment, the locking mechanism 3 includes a connector 31 and a bracket 32. One end of the connector 31 is attached to the first pipe 11, and the other end of the connector 31 is attached to one end of the bracket 32. The other end of the bracket 32 ​​has two connection structures, each connected to the locking mechanism 3. When the multi-stage telescopic tube 1 is in operation, especially when water flows through the elbow and generates a reaction force, the connector 31 and bracket 32 ​​work together to prevent the first pipe 11 from being displaced by external forces. This reduces the risk of collision between internal components of the multi-stage telescopic tube 1, especially under high-pressure water flow conditions, and helps extend the service life of the device.

[0053] See also Figures 2 to 4 In this embodiment, the end of the connector 31 close to the first pipe 11 is arc-shaped and welded to the first pipe 11. This arc-shaped design enables the connector 31 to better fit the outer surface of the first pipe 11, ensuring a good contact area and a stable connection.

[0054] See also Figure 4In this embodiment, the width of the connector 31 gradually decreases from one end close to the first pipe 11 to the other end, preferably evenly, and has a shape similar to an isosceles trapezoid, which helps to distribute the stress acting on the connector 31 more evenly throughout the structure, reducing local stress concentration and thus reducing the risk of fracture.

[0055] See also Figure 4 In this embodiment, the arc length is greater than or equal to one-quarter of the circumference of the first pipe 11, providing a sufficiently large contact area between the connector 31 and the first pipe 11, thereby providing a more stable connection. Preferably, the arc length is approximately one-half of the circumference of the first pipe 11, and the connector 31 is welded to the left or right side of the first pipe 11.

[0056] In some embodiments, the connector 31 may be flange-connected to the first pipe 11 .

[0057] See also Figures 1 to 3 The cam 324 is a latching mechanism which is used to lock the cam 325 and the support frame 326 together so as to lock the cam 326 in the forward direction and lock the support frame 326 together.

[0058] See also Figures 1 to 3 In the preferred case, when the multi-stage telescopic tube 1 is placed flat (axially parallel to the horizontal direction), the support frame 22 and the sliding frame 21 are parallel to the horizontal direction, the front vertical end plate 321 and the rear vertical end plate 325 are perpendicular to the horizontal direction, and the rear horizontal end plate 323 is parallel to the horizontal direction.

[0059] Figures 2 to 3It is shown that the inclination of the first diagonal brace 322 is greater than that of the second diagonal brace 324, and the rear horizontal end plate 323 is connected to the upper surface of the support frame 22, providing a support point in the horizontal direction, and the rear vertical end plate 325 is connected to the front surface of the support frame 22, forming a triangular stable structure, providing a support point in the vertical direction. Such a structure can effectively disperse and transmit the force from the connecting member 31, improve the overall stability of the bracket 32, and effectively fix the first pipe 11 connected thereto, thereby maintaining a stable connection between the first pipe 11 and the elbow 5.

[0060] See also Figures 2 to 3 In this embodiment, the first diagonal brace 322 and the second diagonal brace 324 are integrally formed with the front vertical end plate 321. This integral design allows the front vertical end plate 321, the first diagonal brace 322, and the second diagonal brace 324 to form a complete unit, reducing potential failure points caused by connection points and improving the stability and reliability of the entire bracket 32.

[0061] See also Figure 2 In this embodiment, the first diagonal brace 322 and / or the second diagonal brace 324 are provided with reinforcing ribs 326. The provision of the reinforcing ribs 326 significantly enhances the structural strength of the diagonal brace, enabling it to better withstand the force from the connector 31 and the first pipe 11, and prevent deformation or breakage.

[0062] See also Figure 1 and Figure 5 In this embodiment, the telescopic mechanism 4 includes a telescopic rod 41, which is a hydraulic or pneumatic cylinder. One end of the telescopic rod 41 is connected to the sliding frame 21 via a first base, and the other end is connected to the end of the connector 31 away from the first pipe 11 via a second base 42. The telescopic rod 41 extends and retracts along the axial direction of the first pipe 11. The telescopic rod 41 (hydraulic or pneumatic) is a linear drive device that can extend and retract using hydraulic or pneumatic pressure. This design allows the multi-stage telescopic tube 1 to be adjusted in length when needed. The first base secures one end of the telescopic rod 41 to the sliding frame 21, and the second base 42 secures the other end of the telescopic rod 41 to the end of the connector 31 away from the first pipe 11. As the telescopic rod 41 extends or retracts, it pushes or pulls the connector 31, allowing the sliding frame 21 to slide along the pipe's axial direction on the support frame 22, thereby moving the second pipe 12 along with it and, in turn, causing the first and second pipes 11, 12 to slide relative to each other. In some embodiments, the telescopic rod 41 may be disposed at a position where one end is disposed on the second pipe 12 and the other end is disposed on the first pipe 11 .

[0063] See also Figure 1 and Figure 5In this embodiment, the multi-stage telescopic tube 1 also includes a third tube 13, a fourth tube, and a fifth tube 14. The inner diameters of the first tube 11, the third tube 13, and the second tube 12 increase in sequence, and the first tube 11, the third tube 13, and the second tube 12 are slidably connected from front to back. The first tube 11 (with the smallest inner diameter in this combination) can slide into the third tube 13. The third tube 13 (with a medium inner diameter) can slide into the second tube 12. The inner diameters of the fifth tube 14, the fourth tube, and the second tube 12 increase in sequence, and the second tube 12, the fourth tube, and the fifth tube 14 are slidably connected from front to back. The fifth tube 14 (with the smallest inner diameter in this combination) can slide into the fourth tube. The fourth tube can slide into the second tube 12 (with the largest inner diameter in this combination). With this structure, the multi-stage telescopic tube 1 is finally completely connected to the largest second tube 12, allowing it to be flexibly extended or shortened while remaining compact.

[0064] In some embodiments, the inner diameter of the pipes included in the multi-stage telescopic pipe 1 can increase sequentially from one end to the other end of the whole, rather than from small to large and then from large to small as described above with respect to the first pipe 11 to the fifth pipe 14 .

[0065] In this embodiment, the telescopic mechanism 4 drives the first pipe 11 to the fifth pipe 14 to extend and retract, correspondingly comprising four telescopic rods. Since the second pipe 12 has the largest diameter, one end of three of the telescopic rods can be positioned on the second pipe 12, and the other ends can be positioned on the fifth pipe 14, the fourth pipe, and the third pipe 13, respectively. The remaining telescopic rod 41 is used to connect the first pipe 11 to the sliding frame 21. In certain embodiments, the telescopic rod 41 connected to the first pipe 11 does not need to be positioned on the sliding frame 21, but can be positioned on the second pipe 12.

[0066] See also Figure 1 In this embodiment, the water supply and drainage device further includes a bend 5 and a water supply pipe 6. The water supply pipe 6 is provided on the bottom of the support frame 22. The water inlet of the bend 5 is detachably connected to the water outlet of the first pipe 11, and the water outlet of the bend 5 is detachably connected to the water inlet of the water supply pipe 6. Preferably, the bend 5 is U-shaped. The bend 5 serves to connect the first pipe 11 and the water supply pipe 6. The water inlet of the bend 5 is connected to the water inlet of the first pipe 11 by a detachable connection method (such as a flange connection, a quick connector, etc.), and the water outlet of the bend 5 is connected to the water inlet of the water supply pipe 6 by the same detachable connection method.

[0067] See also Figures 1 to 5This embodiment provides a water supply and drainage vehicle, including a chassis equipped with a water supply and drainage device as described in any of the above embodiments. The multi-stage telescopic pipe 1 of the water supply and drainage device is equipped with a water pump 7 for pumping water. A first pipe 11 serves as the end pipe on the water outlet side of the multi-stage telescopic pipe 1. The water pump 7 is installed on a first pipe (the end pipe on the water inlet side) of the multi-stage telescopic pipe 1, away from the first pipe 11, and can be the end of the fifth pipe 14 mentioned above.

[0068] When water pump 7 is activated, water flows from multi-stage telescopic pipe 1 into elbow 5, then through elbow 5 into water delivery pipe 6, ultimately reaching the target location for water supply or drainage. This target location can be a fire scene or other location requiring water supply or drainage. Alternatively, by removing elbow 5, water pumped by water pump 7 can be ejected directly from first pipe 11.

[0069] It should be noted that although the above embodiments have been described herein, this does not limit the scope of patent protection of the present utility model. Therefore, based on the innovative concept of the present utility model, changes and modifications to the embodiments described herein, or equivalent structural or process transformations made using the contents of the present utility model specification and drawings, and direct or indirect application of the above technical solutions to other related technical fields are all included in the scope of protection of the present utility model patent.

Claims

1. A water supply and drainage device, characterized in that: include: A multi-stage telescopic pipe, comprising a first pipe and a second pipe that can telescope and slide relative to each other; a telescopic mechanism, the telescopic mechanism being used to extend and retract the multi-stage telescopic tube; A slide mechanism, the slide mechanism comprising a slide frame and a support frame, the slide frame being slidably disposed on the support frame and located above the support frame, the second pipe being slidably disposed on the slide frame, and the sliding direction of the second pipe on the slide frame being along the axial direction thereof; as well as A locking mechanism, one end of which is arranged on the first pipe and remains stationary with the one end of the locking mechanism, and the other end is arranged on the support frame.

2. The water supply and drainage device according to claim 1, characterized in that: The locking mechanism includes a connector and a bracket, one end of the connector is arranged on the first pipe, the other end of the connector is arranged on one end of the bracket, and the other end of the bracket has two connection structures respectively connected to the locking mechanism.

3. The water supply and drainage device according to claim 2, characterized in that: One end of the connecting member close to the first pipe is arc-shaped and connected to the first pipe. The width of the connecting member gradually decreases from the one end close to the first pipe to the other end.

4. The water supply and drainage device according to claim 3, characterized in that: The connecting piece is welded to the first pipe, and the length of the arc is greater than or equal to one quarter of the circumference of the first pipe.

5. The water supply and drainage device according to claim 2, characterized in that: The bracket includes a front vertical end plate, a first diagonal brace, a rear horizontal end plate, a second diagonal brace and a rear vertical end plate; The front vertical end plate is connected to the rear surface of an end of the connecting member away from the first pipe by bolts, the first diagonal brace and the second diagonal brace extend rearward from the rear surface of the front vertical end plate, the first diagonal brace is inclined to the rear of the second diagonal brace, the rear surface of the front vertical end plate is connected to the upper surface of the rear horizontal end plate through the first diagonal brace, the rear surface of the front vertical end plate is connected to the front surface of the rear vertical end plate through the second diagonal brace, the rear horizontal end plate is one of the connecting structures and is connected to the support frame by bolts, and the rear vertical end plate is another of the connecting structures and is connected to the support frame by bolts.

6. The water supply and drainage device according to claim 5, characterized in that: The first diagonal brace, the second diagonal brace and the front vertical end plate are integrally formed, and the first diagonal brace and / or the second diagonal brace are provided with reinforcing ribs.

7. The water supply and drainage device according to claim 2, characterized in that: The telescopic mechanism includes a telescopic rod, which is an oil cylinder or a pneumatic cylinder. One end of the telescopic rod is connected to the sliding frame through a first base, and the other end of the telescopic rod is connected to an end of the connecting member away from the first pipe through a second base. The telescopic direction of the telescopic rod is along the axial direction of the first pipe.

8. The water supply and drainage device according to claim 1, characterized in that: The multi-stage telescopic pipe also includes a third pipe, a fourth pipe and a fifth pipe. The inner diameters of the first pipe, the third pipe and the second pipe increase in sequence. The first pipe is slidably sleeved on the front end of the third pipe, and the second pipe is slidably sleeved on the rear end of the third pipe. The inner diameters of the fifth pipe, the fourth pipe and the second pipe increase in sequence. The fourth pipe is slidably sleeved on the rear end of the second pipe, and the fifth pipe is slidably sleeved on the rear end of the fourth pipe.

9. The water supply and drainage device according to any one of claims 1 to 8, characterized in that: It also includes a bend pipe and a water supply pipe. The water supply pipe is arranged on the bottom of the support frame. The water inlet of the bend pipe is detachably connected to the water outlet of the first pipe, and the water outlet of the bend pipe is detachably connected to the water inlet of the water supply pipe.

10. A water supply and drainage vehicle, characterized in that: The utility model comprises a chassis, wherein the chassis is provided with the water supply and drainage device according to any one of claims 1 to 9, and the multi-stage telescopic pipes of the water supply and drainage device are provided with a water pump for pumping water.

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