A hydraulic system and control method for a water supply and drainage vehicle.

Abstract

This invention relates to a hydraulic system and control method for a water supply and drainage vehicle. A first hydraulic cylinder is connected to a hydraulic oil tank via an oil circuit. The first hydraulic cylinder drives the boom mechanism on the water supply and drainage equipment to extend and slide, moving closer to or away from the water intake point. A second hydraulic cylinder is also connected to the hydraulic oil tank via an oil circuit. The second hydraulic cylinder drives the multi-stage first telescopic drainage pipe of the first water supply and drainage mechanism on the water supply and drainage equipment to extend and slide, moving closer to or away from the water supply point. An oil circuit connection mechanism connects the oil circuit between the first and second hydraulic cylinders, so that the first hydraulic cylinder drives the boom mechanism on the water supply and drainage equipment to extend and slide while simultaneously unlocking the second hydraulic cylinder. This allows the boom mechanism to extend and slide while simultaneously driving the second hydraulic cylinder to extend and slide, thereby driving the multi-stage first telescopic drainage pipe of the first water supply and drainage mechanism to extend and slide.

Description

Technical Field

[0001] This invention relates to the field of water supply and drainage emergency equipment technology, and in particular to a hydraulic system and control method for a water supply and drainage vehicle. Background Technology

[0002] As one of the most commonly used emergency rescue equipment, drainage trucks are frequently used for tasks such as drainage, flood control, and waterlogging control. They are also used for irrigation in agriculture and urban greening. When in use, drainage trucks use their onboard drainage devices to drain water from potholes, ditches, and rivers.

[0003] In existing drainage vehicles, the boom and drainage pipe extend and retract to drain water from potholes. Both boom and drainage pipe movements are driven by hydraulic cylinders. Currently, separate inlet and outlet oil lines supply oil to the cylinders driving the boom and the drainage pipe, respectively. When both cylinders are working simultaneously, they need to be controlled separately, which is complex, cumbersome, and detrimental to the timeliness of emergency response. Summary of the Invention

[0004] Therefore, a hydraulic system and control method for a water supply and drainage vehicle are needed to solve the problem of existing drainage vehicles that use boom extension and drainage pipe extension to reach and drain water from potholes during operation. The extension and contraction of the boom and drainage pipe both require hydraulic cylinders to drive them. Currently, separate inlet and outlet oil lines supply oil to the cylinders driving the boom and the cylinders driving the drainage pipe. When the cylinders driving the boom and the cylinders driving the drainage pipe are working simultaneously, the two cylinders need to be controlled separately, which is complex, cumbersome, and detrimental to the timeliness of emergency rescue.

[0005] To achieve the above objectives, the inventors provide a hydraulic system for a water supply and drainage vehicle, comprising:

[0006] A hydraulic oil tank, used to store hydraulic oil;

[0007] The first oil cylinder is connected to the hydraulic oil tank through an oil circuit. The first oil cylinder is used to drive the boom mechanism on the water supply and drainage vehicle to extend and slide, so as to move closer to or away from the water intake point.

[0008] The second oil cylinder is connected to the hydraulic oil tank through an oil circuit. The second oil cylinder is used to drive the multi-stage first telescopic drain pipe of the first water supply and drainage mechanism on the water supply and drainage vehicle to extend and slide, so as to move closer to or away from the water supply point.

[0009] And an oil circuit connection mechanism, which is used to connect the oil circuit between the first oil cylinder and the second oil cylinder, so that the first oil cylinder drives the boom mechanism on the water supply and drainage vehicle to extend and slide while unlocking the second oil cylinder, so that the boom mechanism extends and slides while driving the second oil cylinder to extend and slide, and when the second oil cylinder extends and slides, it drives the multi-stage first telescopic drainage pipe of the first water supply and drainage mechanism to extend and slide.

[0010] As a preferred embodiment of the present invention, the hydraulic system further includes:

[0011] The first control valve has its inlet connected to the hydraulic oil tank via a pipeline, and its return port connected to the hydraulic oil tank via a pipeline.

[0012] The second control valve has its inlet connected to the hydraulic oil tank via a pipeline, and its return port connected to the hydraulic oil tank via a pipeline.

[0013] The first oil circuit has one end connected to the first control valve and the other end connected to the rodless chamber of the first oil cylinder.

[0014] The second oil circuit has one end connected to the first control valve and the other end connected to the rod chamber of the first oil cylinder.

[0015] The third oil circuit has one end connected to the second control valve and the other end connected to the rodless chamber of the second oil cylinder.

[0016] The fourth oil circuit has one end connected to the second control valve and the other end connected to the rod chamber of the second oil cylinder.

[0017] As a preferred structure of the present invention, the oil circuit connection mechanism includes a fifth oil circuit, a sixth oil circuit, a seventh oil circuit, a first hydraulic lock, a second hydraulic lock, and a first shuttle valve;

[0018] One end of the fifth oil circuit is connected to the first oil circuit, and the other end of the fifth oil circuit is connected to the second oil circuit;

[0019] The first shuttle valve is located on the fifth oil line;

[0020] The first hydraulic lock is disposed on the fourth oil line, and the second hydraulic lock is disposed on the third oil line;

[0021] One end of the sixth oil circuit is connected to the first shuttle valve, and the other end of the sixth oil circuit is connected to the first hydraulic lock;

[0022] One end of the seventh oil circuit is connected to the sixth oil circuit, and the other end of the seventh oil circuit is connected to the second hydraulic lock.

[0023] As a preferred structure of the present invention, the oil circuit connection mechanism includes a fifth oil circuit, a sixth oil circuit, a seventh oil circuit, a first hydraulic lock, a second hydraulic lock, and a first shuttle valve;

[0024] The hydraulic system also includes an eighth oil circuit, a ninth oil circuit, a second shuttle valve, and a third shuttle valve;

[0025] One end of the fifth oil circuit is connected to the first oil circuit, and the other end of the fifth oil circuit is connected to the second oil circuit;

[0026] The first shuttle valve is located on the fifth oil line;

[0027] One end of the eighth oil circuit is connected to the third oil circuit, and the other end of the eighth oil circuit is connected to the fourth oil circuit;

[0028] The second shuttle valve is located on the eighth oil line;

[0029] One end of the ninth oil circuit is connected to the first shuttle valve, and the other end of the ninth oil circuit is connected to the second shuttle valve;

[0030] The third shuttle valve is located on the ninth oil line;

[0031] The first hydraulic lock is disposed on the fourth oil line, and the second hydraulic lock is disposed on the third oil line;

[0032] One end of the sixth oil circuit is connected to the third shuttle valve, and the other end of the sixth oil circuit is connected to the first hydraulic lock;

[0033] One end of the seventh oil circuit is connected to the sixth oil circuit, and the other end of the seventh oil circuit is connected to the second hydraulic lock.

[0034] As a preferred structure of the present invention, the hydraulic system further includes a first oil inlet passage, a second oil inlet passage, a first oil return passage, and a second oil return passage;

[0035] One end of the first oil inlet is connected to the hydraulic oil tank, and the other end of the first oil inlet is connected to the first control valve.

[0036] One end of the second oil inlet passage is connected to the first oil inlet passage, and the other end of the second oil inlet passage is connected to the second control valve;

[0037] One end of the first return oil circuit is connected to the hydraulic oil tank, and the other end of the first return oil circuit is connected to the first control valve.

[0038] One end of the second return oil circuit is connected to the first return oil circuit, and the other end of the second return oil circuit is connected to the second control valve.

[0039] As a preferred structure of the present invention, the water supply and drainage vehicle includes a body and a boom mechanism;

[0040] The boom mechanism is mounted on the vehicle body and is hinged to the vehicle body;

[0041] The boom mechanism includes a tilting boom and a first boom;

[0042] The tilting boom is hinged to the vehicle body, and the first boom is mounted on the tilting boom and slidably connected to the tilting boom;

[0043] The first hydraulic cylinder is used to drive the first boom to extend and slide on the tilting boom.

[0044] As a preferred structure of the present invention, the water supply and drainage vehicle further includes a first water supply and drainage mechanism, the boom mechanism is used to support the first water supply and drainage mechanism, and the first water supply and drainage mechanism is used to perform drainage operations and / or water supply operations.

[0045] The first water supply and drainage mechanism is mounted on the first boom;

[0046] The first water supply and drainage mechanism is fixedly connected to the first boom; or

[0047] The first water supply and drainage mechanism is slidably connected to the first boom.

[0048] As a preferred structure of the present invention, the first water supply and drainage mechanism includes a multi-stage first telescopic drainage pipe and a main drainage pipe.

[0049] The main drainage pipe is mounted on the boom mechanism;

[0050] The multi-stage first telescopic drain pipe is nested inside the main drain pipe, and the first end of the multi-stage first telescopic drain pipe is slidably connected to one end of the main drain pipe.

[0051] The multi-stage first telescopic drain pipe extends upward along the length of the boom mechanism; or

[0052] The multi-stage first telescopic drainage pipe extends downward along the length of the boom mechanism;

[0053] The multi-stage first telescopic drain pipes are nested and slidably connected to each other, and the multi-stage first telescopic drain pipes are interconnected. The first end of each multi-stage first telescopic drain pipe is connected to the main drain pipe.

[0054] One end of the second hydraulic cylinder is mounted on the first boom, and the other end of the second hydraulic cylinder is mounted at the end of the multi-stage first telescopic drain pipe;

[0055] The second hydraulic cylinder is used to drive the multi-stage first telescopic drain pipe to extend and slide.

[0056] As a preferred structure of the present invention, the multi-stage first telescopic drain pipe includes a first drain pipe and a second drain pipe;

[0057] The first drain pipe is nested and connected to the inner wall of the main drain pipe, and one end of the first drain pipe is slidably connected to one end of the main drain pipe. The second drain pipe is nested and connected to the inner wall of the first drain pipe, and one end of the second drain pipe is slidably connected to the other end of the first drain pipe.

[0058] The other end of the second cylinder is mounted on the second drain pipe.

[0059] As a preferred structure of the present invention, the first water supply and drainage mechanism further includes a multi-stage second telescopic drainage pipe and a pump body;

[0060] The hydraulic system also includes multiple third cylinders;

[0061] The multi-stage second telescopic drain pipe is arranged opposite to the multi-stage first telescopic drain pipe;

[0062] The multi-stage second telescopic drain pipe is nested inside the main drain pipe. The first end of the multi-stage second telescopic drain pipe is slidably connected to the other end of the main drain pipe. The end of the multi-stage second telescopic drain pipe is connected to the pump body. The multi-stage second telescopic drain pipe extends downward along the length of the boom mechanism.

[0063] The multi-stage second telescopic drain pipes are nested and slidably connected to each other, and the multi-stage second telescopic drain pipes are interconnected. The first end of each multi-stage second telescopic drain pipe is connected to the main drain pipe.

[0064] The plurality of third hydraulic cylinders are respectively disposed on the multi-stage second telescopic drain pipe, and the plurality of third hydraulic cylinders are respectively used to drive the multi-stage second telescopic drain pipe to extend and slide along the length direction of the boom mechanism.

[0065] As a preferred structure of the present invention, the multi-stage second telescopic drain pipe includes a third drain pipe and a fourth drain pipe;

[0066] The third drain pipe is nested within the inner wall of the main drain pipe, with one end of the third drain pipe slidably connected to the other end of the main drain pipe. The fourth drain pipe is nested within the inner wall of the third drain pipe, with one end of the fourth drain pipe slidably connected to the other end of the third drain pipe.

[0067] The advantages of the above technical solution, which differs from existing technologies, are as follows: In emergency operations, the hydraulic system of the water supply and drainage vehicle allows the vehicle to be driven to a flat area at the work site. Operation is performed according to the needs of the site. When it is necessary to slide the boom mechanism and the multi-stage first telescopic drainage pipe of the first water supply and drainage mechanism outwards, the hydraulic system's oil circuit connection mechanism connects the oil circuit between the first and second cylinders. This allows the first cylinder to drive the boom mechanism on the water supply and drainage vehicle to slide downwards while simultaneously unlocking the second cylinder. This causes the boom mechanism to slide downwards while simultaneously driving the second cylinder to slide downwards, and the second cylinder to... When the boom extends downwards, it drives the multi-stage first telescopic drain pipe of the first water supply and drainage mechanism to slide downwards and extend. At this time, the boom mechanism and the multi-stage first telescopic drain pipe of the first water supply and drainage mechanism slide downwards and extend simultaneously. During this process, there is no need to control the second cylinder separately. While controlling the first cylinder, the second cylinder is unlocked. The second cylinder is in a free state at this time. The second cylinder slides downwards and extends under the drive of the boom mechanism. The downward extension of the second cylinder drives the multi-stage first telescopic drain pipe of the first water supply and drainage mechanism to slide downwards and extend. This reduces the operation steps of controlling the second cylinder separately, making the operation simple and improving the timeliness of emergency rescue.

[0068] To achieve the above objectives, the inventors also provide a hydraulic system control method for a water supply and drainage vehicle, wherein the hydraulic control method for the drainage vehicle is applied to the hydraulic system of the water supply and drainage vehicle as described in any of the above-mentioned inventors' methods.

[0069] The hydraulic system control method of the drainage vehicle includes the following steps:

[0070] S10: The first cylinder extends, energizing YV2, which controls the first control valve. The valve core of the first control valve moves, and the hydraulic oil flows to the first oil circuit and the fifth oil circuit.

[0071] The hydraulic oil in the first oil circuit flows into the rodless chamber of the first oil cylinder, thereby causing the piston rod of the first oil cylinder to extend. The extension of the piston rod of the first oil cylinder drives the first boom of the boom mechanism to extend downward.

[0072] The hydraulic oil in the fifth oil circuit flows to the sixth and seventh oil circuits. The hydraulic oil in the sixth oil circuit flows to the fourth oil circuit, and the hydraulic oil flows from the fourth oil circuit into the rod chamber of the second oil cylinder. At the same time, the hydraulic oil in the seventh oil circuit flows to the third oil circuit, and the hydraulic oil flows from the third oil circuit into the rodless chamber of the second oil cylinder. At this time, the hydraulic oil flows freely between the rod chamber and the rodless chamber of the second oil cylinder. The second oil cylinder automatically unlocks. When the first oil cylinder drives the first boom of the boom mechanism to extend downward, it drives the piston rod of the second oil cylinder to extend. When the piston rod of the second oil cylinder extends, it drives the multi-stage first telescopic drain pipe of the first water supply and drainage mechanism to extend downward.

[0073] S20: The first cylinder retracts, energizing YV1, which controls the first control valve. The valve core of the first control valve moves, and the hydraulic oil flows to the second and fifth oil circuits.

[0074] The hydraulic oil in the second oil circuit flows into the rod chamber of the first oil cylinder, causing the piston rod of the first oil cylinder to retract. The retraction of the piston rod of the first oil cylinder drives the first boom of the boom mechanism to retract upward.

[0075] The hydraulic oil in the fifth oil circuit flows to the sixth and seventh oil circuits, and the hydraulic oil in the sixth oil circuit flows to the fourth oil circuit. Hydraulic oil flows from the fourth oil circuit into the rod chamber of the second cylinder; simultaneously, the hydraulic oil in the seventh oil circuit flows to the third oil circuit, and from the third oil circuit flows into the rodless chamber of the second cylinder. At this time, the hydraulic oil flows freely between the rod and rodless chambers of the second cylinder, and the second cylinder automatically unlocks. When the first cylinder drives the first boom of the boom mechanism to retract upwards, it simultaneously retracts the piston rod of the second cylinder. The retraction of the piston rod of the second cylinder, in turn, causes the multi-stage first telescopic drain pipe of the first water supply and drainage mechanism to retract upwards.

[0076] As a preferred method of the present invention, the hydraulic control method of the water supply and drainage vehicle further includes the following steps:

[0077] S30: The second cylinder extends, energizing YV3, which controls the second control valve. The valve core of the second control valve moves, and the hydraulic oil flows to the third and eighth oil circuits.

[0078] The hydraulic oil in the eighth oil circuit flows to the ninth oil circuit through the second shuttle valve. The hydraulic oil in the ninth oil circuit flows to the sixth and seventh oil circuits through the third shuttle valve. The hydraulic oil in the seventh oil circuit flows to V3 of the second hydraulic lock. When hydraulic oil flows into V3 of the second hydraulic lock, it connects C4 and V4 of the second hydraulic lock. The hydraulic oil flows from the third oil circuit into the rodless chamber of the second cylinder. At this time, the hydraulic oil in the third oil circuit flows into the rodless chamber of the second cylinder through the second hydraulic lock, thereby causing the piston rod of the second cylinder to extend. The extension of the piston rod of the second cylinder drives the multi-stage first telescopic drain pipe of the first water supply and drainage mechanism to extend upward.

[0079] At the same time, the hydraulic oil in the sixth oil circuit flows to V1 of the first hydraulic lock. When the hydraulic oil flows into V1 of the first hydraulic lock, it connects C2 and V2 of the first hydraulic lock, unlocking the first hydraulic lock. The hydraulic oil in the second oil cylinder flows out from the rod chamber of the second oil cylinder to the fourth oil circuit, and the hydraulic oil flows back to the hydraulic oil tank from the fourth oil circuit.

[0080] As a preferred method of the present invention, the hydraulic control method of the water supply and drainage vehicle further includes the following steps:

[0081] S40: The second cylinder retracts, energizing the YV4 control valve of the second control valve, causing the valve core of the second control valve to move, and the hydraulic oil flows to the fourth and eighth oil circuits.

[0082] The hydraulic oil in the eighth oil circuit flows to the ninth oil circuit through the second shuttle valve. The hydraulic oil in the ninth oil circuit flows to the sixth and seventh oil circuits through the third shuttle valve. The hydraulic oil in the sixth oil circuit flows to V1 of the first hydraulic lock. When hydraulic oil flows into V1 of the first hydraulic lock, it connects C2 and V2 of the first hydraulic lock, unlocking the first hydraulic lock. The hydraulic oil flows from the fourth oil circuit into the rod chamber of the second cylinder. At this time, the hydraulic oil in the fourth oil circuit flows into the rod chamber of the second cylinder through the first hydraulic lock, causing the piston rod of the second cylinder to retract. The retraction of the piston rod of the second cylinder drives the multi-stage first telescopic drain pipe of the first water supply and drainage mechanism to retract downward.

[0083] At the same time, the hydraulic oil in the seventh oil circuit flows to V3 of the second hydraulic lock. When the hydraulic oil flows into V3 of the second hydraulic lock, it connects C4 and V4 of the second hydraulic lock, unlocking the second hydraulic lock. The hydraulic oil in the second cylinder flows out from the rodless chamber of the second cylinder to the third oil circuit, and the hydraulic oil flows back to the hydraulic oil tank from the third oil circuit.

[0084] The advantages of the above technical solution, which differs from the prior art, are as follows: In the hydraulic system control method of the water supply and drainage vehicle of the present invention, the boom mechanism and the multi-stage first telescopic drainage pipe of the first water supply and drainage mechanism slide downward and extend simultaneously. During this process, there is no need to perform separate control operation on the second cylinder. While controlling the first cylinder, the second cylinder is unlocked. The second cylinder is in a free state at this time. The second cylinder slides downward and extends under the drive of the boom mechanism. The downward sliding extension of the second cylinder drives the multi-stage first telescopic drainage pipe of the first water supply and drainage mechanism to slide downward and extend. This reduces the operation steps of separately controlling the second cylinder, making the operation simple and improving the timeliness of emergency rescue.

[0085] The above description of the invention 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

[0086] The accompanying drawings are only used to illustrate the principles, implementation methods, applications, features, and effects of specific embodiments of this application and other related content, and should not be considered as limitations on this application.

[0087] In the accompanying drawings of the instruction manual:

[0088] Figure 1This is a schematic diagram of the water supply and drainage vehicle described in the specific implementation method;

[0089] Figure 2 for Figure 1 One of the enlarged partial schematic diagrams in the image;

[0090] Figure 3 for Figure 1 The second enlarged schematic diagram in the image;

[0091] Figure 4 This is a partial structural schematic diagram of the water supply and drainage vehicle described in a specific embodiment;

[0092] Figure 5 This is a schematic diagram of the hydraulic system described in a specific implementation.

[0093] Figure 6 This is one of the schematic diagrams illustrating the principle of the extension of the first cylinder of the hydraulic system described in a specific embodiment;

[0094] Figure 7 This is a second schematic diagram illustrating the principle of the extension of the first cylinder of the hydraulic system described in a specific implementation method.

[0095] Figure 8 This is one of the schematic diagrams illustrating the principle of the retraction of the first cylinder of the hydraulic system described in the specific implementation method;

[0096] Figure 9 This is the second schematic diagram illustrating the principle of the retraction of the first cylinder of the hydraulic system described in the specific implementation method.

[0097] Figure 10 This is a schematic diagram illustrating the principle of the extension of the second oil cylinder in the hydraulic system described in a specific implementation.

[0098] Figure 11 This is a schematic diagram illustrating the principle of the retraction of the second cylinder in the hydraulic system described in a specific implementation.

[0099] The reference numerals used in the above figures are explained as follows:

[0100] 1. Vehicle body,

[0101] 2. Boom mechanism,

[0102] 21. Tilting boom,

[0103] 22. First boom,

[0104] 3. The first water supply and drainage system,

[0105] 31. Main drain pipe,

[0106] 32. Multi-stage first telescopic drainage pipe,

[0107] 321. First drain pipe,

[0108] 322. Second drain pipe,

[0109] 33. Multi-stage second telescopic drainage pipe,

[0110] 331. Third drainage pipe,

[0111] 332. Fourth drain pipe,

[0112] 34. Pump body,

[0113] 35. The third hydraulic cylinder,

[0114] 4. Hydraulic system,

[0115] 41. Hydraulic oil tank,

[0116] 401. First oil inlet circuit.

[0117] 402. Second oil inlet circuit.

[0118] 403, First oil circuit,

[0119] 404, Second oil return circuit,

[0120] 42. First control valve,

[0121] 43. Second control valve,

[0122] 44. First oil circuit,

[0123] 45. Second oil circuit,

[0124] 46. ​​Third oil circuit

[0125] 47. Fourth oil circuit

[0126] 48. First oil cylinder,

[0127] 49. Second hydraulic cylinder

[0128] 410. Oil circuit connecting mechanism,

[0129] 411. Fifth oil line,

[0130] 412. Sixth oil line,

[0131] 413. Seventh oil line,

[0132] 414. First hydraulic lock,

[0133] 415. Second hydraulic lock,

[0134] 416. First shuttle valve,

[0135] 417. Eighth oil line,

[0136] 418. Ninth oil route,

[0137] 419. Second shuttle valve,

[0138] 420. Third shuttle valve. Detailed Implementation

[0139] 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.

[0140] 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.

[0141] 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.

[0142] 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.

[0143] 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.

[0144] Unless otherwise specified, the use of terms such as “comprising,” “including,” “having,” or other similar 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.

[0145] 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.

[0146] 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. These expressions are only for the convenience 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. Furthermore, in this context, it should be understood that when it is mentioned that an element is connected "on" or "below" another element, it can be directly connected not only to the other element "on" or "below," but also indirectly connected to the other element "on" or "below" through an intermediate element.

[0147] 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 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 components or the interaction between two components. For those skilled in the art to which this application pertains, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0148] Please see Figures 1 to 11This embodiment relates to a hydraulic system 4 of a water supply and drainage vehicle, including a hydraulic oil tank 41, a first cylinder 48, a second cylinder 49, and an oil circuit connection mechanism 410. The hydraulic oil tank 41 is used to store hydraulic oil. Furthermore, the hydraulic system 4 also includes a hydraulic pump, which is installed on the hydraulic pipeline of the hydraulic system 4. The first cylinder 48 is connected to the hydraulic oil tank 41 via an oil circuit to form a hydraulic loop. The first cylinder 48 is used to drive the boom mechanism 2 on the water supply and drainage vehicle to extend and slide, moving closer to or away from the water intake point, thereby facilitating drainage operations. The second cylinder 49 is connected to the hydraulic oil tank 41 via an oil circuit to form a hydraulic loop. The second cylinder 49 is used to drive the multi-stage first telescopic drainage pipe 32 of the first water supply and drainage mechanism 3 on the water supply and drainage vehicle to extend and slide, moving closer to or away from the water supply point, thereby facilitating water supply to higher locations. The oil circuit connection mechanism 410 connects the oil circuit between the first oil cylinder 48 and the second oil cylinder 49, so that the first oil cylinder 48 drives the boom mechanism 2 on the water supply and drainage vehicle to extend and slide while simultaneously unlocking the second oil cylinder 49. This eliminates the need for separate control of the second oil cylinder 49; by controlling the first oil cylinder 48 while simultaneously unlocking the second oil cylinder 49, the operation steps are reduced, making operation simpler and improving the timeliness of emergency response. The extension and sliding of the boom mechanism 2 simultaneously drives the extension and sliding of the second oil cylinder 49, which in turn drives the multi-stage first telescopic drainage pipe 32 of the first water supply and drainage mechanism 3 to extend and slide.

[0149] Specifically, in this embodiment, the hydraulic system 4 of the water supply and drainage vehicle, such as... Figures 1 to 11As shown, during emergency rescue operations, the water supply and drainage vehicle is driven to a flat area at the work site. Operation is performed according to the needs of the site. When it is necessary to slide the boom mechanism 2 and the multi-stage first telescopic drainage pipe 32 of the first water supply and drainage mechanism 3 out, the hydraulic system 4 connects the oil circuit between the first cylinder 48 and the second cylinder 49 via the oil circuit connection mechanism 410. This allows the first cylinder 48 to drive the boom mechanism 2 on the water supply and drainage vehicle to slide downwards while simultaneously unlocking the second cylinder 49. The second cylinder 49 then slides downwards, thereby driving the first water supply and drainage mechanism... The multi-stage first telescopic drain pipe 32 of the boom mechanism 2 and the first water supply and drainage mechanism 3 simultaneously slides downwards and extends. During this process, there is no need to separately control the second cylinder 49. While controlling the first cylinder 48, the second cylinder 49 is unlocked, leaving it in a free state. Driven by the boom mechanism 2, the second cylinder 49 slides downwards and extends, thereby driving the multi-stage first telescopic drain pipe 32 of the first water supply and drainage mechanism 3 to slide downwards and extend. This reduces the need for separate control of the second cylinder 49, simplifying operation and improving the timeliness of emergency response. It should be noted that in this embodiment, when the multi-stage first telescopic drain pipe 32 of the boom mechanism 2 and the first water supply and drainage mechanism 3 needs to be slidably retracted, the principle is the same as the sliding extension, and will not be repeated here.

[0150] Specifically, in this embodiment, the hydraulic system 4 provides hydraulic power to the boom mechanism 2 and the first water supply and drainage mechanism 3 of the drainage vehicle. Specifically, in this embodiment, the water supply and drainage vehicle can be, but is not limited to, a drainage emergency vehicle, a mobile pumping station, a mother-daughter drainage emergency vehicle, a water intake vehicle, a pipe laying vehicle, a tracked vehicle for well operations, a mobile drainage device for tunnels, or a van-type drainage device, etc. The water supply and drainage vehicle can be a gasoline vehicle, a diesel vehicle, a pure electric vehicle, a hybrid vehicle, or a range-extended vehicle.

[0151] Furthermore, in some embodiments, such as Figures 5 to 11 As shown, there are at least two first hydraulic cylinders 48, connected in parallel. Each of the at least two first hydraulic cylinders 48 is used to drive the boom mechanism 2 on the water supply and drainage vehicle to extend or retract, moving it closer to or away from the water intake point. Preferably, in this embodiment, as... Figures 5 to 11 As shown, there are two first hydraulic cylinders 48. In other embodiments, there may be one or more first hydraulic cylinders 48. It should be noted that in this embodiment, the number of first hydraulic cylinders 48 is not limited.

[0152] Furthermore, in some embodiments, such as Figures 5 to 11 As shown, the hydraulic system 4 of the water supply and drainage vehicle also includes:

[0153] A first control valve 42, the oil inlet of which is connected to the hydraulic oil tank 41 via a pipeline, and the oil return port of which is also connected to the hydraulic oil tank 41 via a pipeline; preferably, in this embodiment, as... Figures 5 to 11 As shown, the first control valve 42 is a three-position four-way solenoid directional valve.

[0154] The second control valve 43 has its inlet connected to the hydraulic oil tank 41 via a pipeline, and its return port connected to the hydraulic oil tank 41 via a pipeline; preferably, in this embodiment, as... Figures 5 to 11 As shown, the second control valve 43 is a three-position four-way solenoid directional valve.

[0155] The first oil passage 44 has one end connected to the first control valve 42 and the other end connected to the rodless chamber of the first oil cylinder 48.

[0156] The second oil passage 45 has one end connected to the first control valve 42 and the other end connected to the rod chamber of the first oil cylinder 48.

[0157] The third oil passage 46, one end of which is connected to the second control valve 43, and the other end of which is connected to the rodless chamber of the second oil cylinder 49;

[0158] The fourth oil passage 47 is connected at one end to the second control valve 43 and at the other end to the rod chamber of the second oil cylinder 49.

[0159] Furthermore, in some embodiments, such as Figure 6 and Figure 8 As shown, the oil circuit connection mechanism 410 includes a fifth oil circuit 411, a sixth oil circuit 412, a seventh oil circuit 413, a first hydraulic lock 414, a second hydraulic lock 415, and a first shuttle valve 416; one end of the fifth oil circuit 411 is connected to the first oil circuit 44, and the other end of the fifth oil circuit 411 is connected to the second oil circuit 45; the first shuttle valve 416 is disposed on the fifth oil circuit 411; the first hydraulic lock 414 is disposed on the fourth oil circuit 47, and the second hydraulic lock 415 is disposed on the third oil circuit 46; one end of the sixth oil circuit 412 is connected to the first shuttle valve 416, and the other end of the sixth oil circuit 412 is connected to the first hydraulic lock 414; one end of the seventh oil circuit 413 is connected to the sixth oil circuit 412, and the other end of the seventh oil circuit 413 is connected to the second hydraulic lock 415. Specifically, in this embodiment, as... Figure 6and Figure 8 As shown, the boom mechanism 2 and the multi-stage first telescopic drain pipe 32 of the first water supply and drainage mechanism 3 simultaneously slide downwards and extend. During this process, there is no need for separate control of the second cylinder 49. While controlling the first cylinder 48, the second cylinder 49 is unlocked, leaving it in a free state. Driven by the boom mechanism 2, the second cylinder 49 slides downwards and extends, thereby causing the multi-stage first telescopic drain pipe 32 of the first water supply and drainage mechanism 3 to slide downwards and extend. This reduces the need for separate control of the second cylinder 49, simplifying operation and improving the timeliness of emergency response. It should be noted that the structure of the oil circuit connection mechanism 410 in this embodiment is not limited to this. Those skilled in the art can select other suitable oil circuit connection mechanisms 410 based on the teachings of this embodiment.

[0160] Specifically, in this embodiment, such as Figure 7 , Figure 9 , Figure 10 as well as Figure 11 As shown, the oil circuit connection mechanism 410 includes a fifth oil circuit 411, a sixth oil circuit 412, a seventh oil circuit 413, a first hydraulic lock 414, a second hydraulic lock 415, and a first shuttle valve 416; the hydraulic system 4 of the water supply and drainage vehicle also includes an eighth oil circuit 417, a ninth oil circuit 418, a second shuttle valve 419, and a third shuttle valve 420; one end of the fifth oil circuit 411 is connected to the first oil circuit 44, and the other end of the fifth oil circuit 411 is connected to the second oil circuit 45; the first shuttle valve 416 is disposed on the fifth oil circuit 411; one end of the eighth oil circuit 417 is connected to the third oil circuit 46, and the other end of the eighth oil circuit 417 is connected to the fourth oil circuit 47; the second ... Valve 419 is disposed on the eighth oil passage 417; one end of the ninth oil passage 418 is connected to the first shuttle valve 416, and the other end of the ninth oil passage 418 is connected to the second shuttle valve 419; the third shuttle valve 420 is disposed on the ninth oil passage 418; the first hydraulic lock 414 is disposed on the fourth oil passage 47, and the second hydraulic lock 415 is disposed on the third oil passage 46; one end of the sixth oil passage 412 is connected to the third shuttle valve 420, and the other end of the sixth oil passage 412 is connected to the first hydraulic lock 414; one end of the seventh oil passage 413 is connected to the sixth oil passage 412, and the other end of the seventh oil passage 413 is connected to the second hydraulic lock 415. Specifically, in this embodiment, as... Figure 7 , Figure 9 , Figure 10 as well as Figure 11As shown, the boom mechanism 2 and the multi-stage first telescopic drain pipe 32 of the first water supply and drainage mechanism 3 simultaneously slide downwards and extend. During this process, there is no need for separate control of the second cylinder 49. While controlling the first cylinder 48, the second cylinder 49 is unlocked, leaving it in a free state. Driven by the boom mechanism 2, the second cylinder 49 slides downwards and extends, thereby driving the multi-stage first telescopic drain pipe 32 of the first water supply and drainage mechanism 3 to slide downwards and extend. This reduces the need for separate control of the second cylinder 49, simplifying operation and improving the timeliness of emergency response. Furthermore, operating the second cylinder 49 alone to drive the multi-stage first telescopic drain pipe 32 of the first water supply and drainage mechanism 3 to slide upwards does not affect the working state of the first cylinder 48. It should be noted that the structure of the oil circuit connection mechanism 410 in this embodiment is not limited to this; those skilled in the art can select other suitable oil circuit connection mechanisms 410 based on the teachings of this embodiment.

[0161] Furthermore, in some embodiments, such as Figures 5 to 11 As shown, the hydraulic system 4 of the water supply and drainage vehicle further includes a first oil inlet line 401, a second oil inlet line 402, a first oil return line 403, and a second oil return line 404; one end of the first oil inlet line 401 is connected to the hydraulic oil tank 41, and the other end of the first oil inlet line 401 is connected to the first control valve 42; one end of the second oil inlet line 402 is connected to the first oil inlet line 401, and the other end of the second oil inlet line 402 is connected to the second control valve 43; one end of the first oil return line 403 is connected to the hydraulic oil tank 41, and the other end of the first oil return line 403 is connected to the first control valve 42; one end of the second oil return line 404 is connected to the first oil return line 403, and the other end of the second oil return line 404 is connected to the second control valve 43.

[0162] Furthermore, in some embodiments, such as Figures 1 to 4 As shown, the water supply and drainage vehicle includes a vehicle body 1 and a boom mechanism 2; the vehicle body 1 is used to carry the emergency rescue equipment and / or the boom mechanism 2 and the first water supply and drainage mechanism 3 on the vehicle. The boom mechanism 2 is mounted on the vehicle body 1 and is hinged to the vehicle body 1 so that the boom mechanism 2 can be moved away from the vehicle body 1 and closer to the water intake point. Specifically, in this embodiment, as... Figures 1 to 4As shown, the boom mechanism 2 includes a tilting boom 21 and a first boom 22. The tilting boom 21 is hinged to the vehicle body 1, and the first boom 22 is mounted on the tilting boom 21. The first boom 22 and the tilting boom 21 are slidably connected to each other to be close to the drainage point for convenient drainage operations. The first hydraulic cylinder 48 is used to drive the first boom 22 to extend and slide on the tilting boom 21. The hydraulic circuit between the first hydraulic cylinder 48 and the second hydraulic cylinder 49 is connected through the hydraulic circuit connection mechanism 410, and the second hydraulic cylinder 49 is unlocked at the same time. This allows the first boom 22 to extend and slide while simultaneously driving the second hydraulic cylinder 49 to extend and slide. When the second hydraulic cylinder 49 extends and slides, it drives the multi-stage first telescopic drainage pipe 32 of the first water supply and drainage mechanism 3 to extend and slide. In other embodiments, there are two first booms 22, which are slidably connected to each other. It should be noted that the structure of the boom mechanism 2 in this embodiment is not limited to this. Those skilled in the art can choose other suitable boom mechanisms 2 based on the teachings of this embodiment.

[0163] Furthermore, in some embodiments, such as Figures 1 to 4 As shown, the water supply and drainage vehicle also includes a first water supply and drainage mechanism 3; the first water supply and drainage mechanism 3 is mounted on the first boom 22, and is used to perform drainage operations and / or water supply operations, selecting the operating mode according to the actual needs of the emergency rescue site. The first water supply and drainage mechanism 3 is fixedly connected to the first boom 22; or in other embodiments, the first water supply and drainage mechanism 3 is slidably connected to the first boom 22.

[0164] Furthermore, in some embodiments, such as Figures 1 to 4As shown, the first water supply and drainage mechanism 3 includes a multi-stage first telescopic drain pipe 32 and a main drain pipe 31; the main drain pipe 31 is disposed on the first boom 22 of the boom mechanism 2; the multi-stage first telescopic drain pipe 32 is nested inside the main drain pipe 31, and the first end of the multi-stage first telescopic drain pipe 32 is slidably connected to one end of the main drain pipe 31; specifically, in this embodiment, when the second hydraulic cylinder 49 is operated independently, the multi-stage first telescopic drain pipe 32 extends upward along the length direction of the boom mechanism 2; when the first hydraulic cylinder 48 is operated independently, the multi-stage first telescopic drain pipe 32 extends downward along the length direction of the boom mechanism 2. The multi-stage first telescopic drain pipes 32 are nested and slidably connected to each other, and are interconnected. The first end of each multi-stage first telescopic drain pipe 32 is connected to the main drain pipe 31. One end of the second hydraulic cylinder 49 is mounted on the first boom 22, and the other end of the second hydraulic cylinder 49 is mounted on the end of each multi-stage first telescopic drain pipe 32. The second hydraulic cylinder 49 is used to drive the multi-stage first telescopic drain pipes 32 to extend and retract. It should be noted that the structure of the first water supply and drainage mechanism 3 in this embodiment is not limited to this. Those skilled in the art can select other suitable first water supply and drainage mechanisms 3 based on the teachings of this embodiment.

[0165] Specifically, in this embodiment, such as Figures 1 to 4 As shown, the multi-stage first telescopic drain pipe 32 includes a first drain pipe 321 and a second drain pipe 322. The first drain pipe 321 is nested within the inner arm of the main drain pipe 31, with one end of the first drain pipe 321 slidably connected to one end of the main drain pipe 31. The second drain pipe 322 is nested within the inner wall of the first drain pipe 321, with one end of the second drain pipe 322 slidably connected to the other end of the first drain pipe 321. The other end of the second hydraulic cylinder 49 is disposed on the second drain pipe 322. It should be noted that the number of multi-stage first telescopic drain pipes 32 is not limited in this embodiment; the corresponding number of drain pipes can be set according to actual needs.

[0166] Furthermore, in some embodiments, such as Figures 1 to 4As shown, the first water supply and drainage mechanism 3 further includes a multi-stage second telescopic drainage pipe 33 and a pump body 34; the hydraulic system 4 of the water supply and drainage vehicle also includes multiple third oil cylinders 35; the multi-stage second telescopic drainage pipe 33 is arranged opposite to the multi-stage first telescopic drainage pipe 32; the multi-stage second telescopic drainage pipe 33 is nested inside the main drainage pipe 31, the first end of the multi-stage second telescopic drainage pipe 33 is slidably connected to the other end of the main drainage pipe 31, the end of the multi-stage second telescopic drainage pipe 33 is connected to the pump body 34, and the multi-stage second telescopic drainage pipe 33 extends downward along the length direction of the boom mechanism 2 to be close to the drainage point. The multi-stage second telescopic drain pipes 33 are nested and slidably connected to each other, and are interconnected. The first end of each multi-stage second telescopic drain pipe 33 is connected to the main drain pipe 31. Multiple third hydraulic cylinders 35 are respectively disposed on the multi-stage second telescopic drain pipes 33, and are used to drive the multi-stage second telescopic drain pipes 33 to extend and retract along the length of the boom mechanism 2. It should be noted that the structure of the first water supply and drainage mechanism 3 in this embodiment is not limited to this, and those skilled in the art can select other suitable first water supply and drainage mechanisms 3 based on the teachings of this embodiment.

[0167] Specifically, in this embodiment, such as Figures 1 to 4 As shown, the multi-stage second telescopic drain pipe 33 includes a third drain pipe 331 and a fourth drain pipe 332. The third drain pipe 331 is nested within the inner arm of the main drain pipe 31, with one end slidably connected to the other end of the main drain pipe 31. The fourth drain pipe 332 is nested within the inner wall of the third drain pipe 331, with one end slidably connected to the other end of the third drain pipe 331 to be close to the drainage point. It should be noted that the number of multi-stage second telescopic drain pipes 33 is not limited in this embodiment; the corresponding number of drain pipes can be set according to actual needs.

[0168] Please see Figures 1 to 11 This embodiment also relates to a control method for the hydraulic system 4 of a water supply and drainage vehicle. The hydraulic control method of the drainage vehicle is applied to the hydraulic system 4 of the water supply and drainage vehicle as described in any of the above-mentioned inventors.

[0169] The hydraulic system 4 control method of the drainage vehicle includes the following steps:

[0170] S10: The first cylinder 48 extends, energizing YV2 of the first control valve 42. The valve core of the first control valve 42 actuates, and the hydraulic oil flows as follows... Figure 6 and Figure 7As shown, hydraulic oil flows to the first oil passage 44 and the fifth oil passage 411; the hydraulic oil in the first oil passage 44 flows into the rodless chamber of the first cylinder 48, causing the piston rod of the first cylinder 48 to extend, which in turn drives the first boom 22 of the boom mechanism 2 to extend downward; the hydraulic oil in the fifth oil passage 411 flows to the sixth oil passage 412 and the seventh oil passage 413, the hydraulic oil in the sixth oil passage 412 flows to the fourth oil passage 47, and the hydraulic oil flows from the fourth oil passage 47 into the rod chamber of the second cylinder 49; simultaneously Hydraulic oil from the seventh oil passage 413 flows to the third oil passage 46. Hydraulic oil from the third oil passage 46 flows into the rodless chamber of the second cylinder 49. At this time, the hydraulic oil flows freely between the rod and rodless chambers of the second cylinder 49. The second cylinder 49 automatically unlocks. When the first cylinder 48 drives the first boom 22 of the boom mechanism 2 to extend downwards, it simultaneously drives the piston rod of the second cylinder 49 to extend. The extension of the piston rod of the second cylinder 49, in turn, drives the multi-stage first telescopic drain pipe 32 of the first water supply and drainage mechanism 3 to extend downwards. Specifically, in this embodiment, the flow direction of the hydraulic oil is as follows... Figure 6 and Figure 7 As shown, the hydraulic oil in the fifth oil circuit 411 flows to the sixth oil circuit 412 and the seventh oil circuit 413 through the first shuttle valve 416. The hydraulic oil in the sixth oil circuit 412 flows to V1 of the first hydraulic lock 414. When hydraulic oil flows into V1 of the first hydraulic lock 414, it connects C2 and V2 of the first hydraulic lock 414. The hydraulic oil flows from the fourth oil circuit 47 into the rod chamber of the second cylinder 49. At the same time, the hydraulic oil in the seventh oil circuit 413 flows to V3 of the second hydraulic lock 415. When hydraulic oil flows into V3 of the second hydraulic lock 415, it connects C4 and V4 of the second hydraulic lock 415. The hydraulic oil flows from the third oil passage 46 into the rodless chamber of the second cylinder 49. At this time, the hydraulic oil flows freely between the rod chamber and the rodless chamber of the second cylinder 49. The second cylinder 49 automatically unlocks. When the first cylinder 48 drives the first boom 22 of the boom mechanism 2 to extend downward, it also drives the piston rod of the second cylinder 49 to extend. When the piston rod of the second cylinder 49 extends, it drives the multi-stage first telescopic drain pipe 32 of the first water supply and drainage mechanism 3 to extend downward. Within the stroke range, the second cylinder 49 extends along with the extension of the first cylinder 48, maintaining the same extension length.

[0171] At this time, the boom mechanism 2 and the multi-stage first telescopic drain pipe 32 of the first water supply and drainage mechanism 3 simultaneously slide downward and extend. During this process, there is no need to control the second cylinder 49 separately. While controlling the first cylinder 48, the second cylinder 49 is unlocked. The second cylinder 49 is in a free state at this time. Driven by the boom mechanism 2, the second cylinder 49 slides downward and extends. The downward sliding extension of the second cylinder 49 drives the multi-stage first telescopic drain pipe 32 of the first water supply and drainage mechanism 3 to slide downward and extend. This reduces the operation steps of controlling the second cylinder 49 separately, making the operation simple and improving the timeliness of emergency rescue.

[0172] S20: The first cylinder 48 retracts, energizing YV1 of the first control valve 42. The valve core of the first control valve 42 actuates, and the hydraulic oil flows as follows... Figure 8 and Figure 9 As shown, hydraulic oil flows to the second oil passage 45 and the fifth oil passage 411; the hydraulic oil in the second oil passage 45 flows into the rod chamber of the first oil cylinder 48, causing the piston rod of the first oil cylinder 48 to retract, and the retraction of the piston rod of the first oil cylinder 48 drives the first boom 22 of the boom mechanism 2 to retract upward; the hydraulic oil in the fifth oil passage 411 flows to the sixth oil passage 412 and the seventh oil passage 413, and the hydraulic oil in the sixth oil passage 412 flows to the fourth oil passage 47. Hydraulic oil flows from the fourth oil passage 47 into the rod chamber of the second cylinder 49; simultaneously, hydraulic oil from the seventh oil passage 413 flows to the third oil passage 46, and hydraulic oil flows from the third oil passage 46 into the rodless chamber of the second cylinder 49. At this time, the hydraulic oil flows freely between the rod and rodless chambers of the second cylinder 49, and the second cylinder 49 automatically unlocks. When the first cylinder 48 drives the first boom 22 of the boom mechanism 2 to retract upward, it simultaneously drives the piston rod of the second cylinder 49 to retract. When the piston rod of the second cylinder 49 retracts, it drives the multi-stage first telescopic drain pipe 32 of the first water supply and drainage mechanism 3 to retract upward. Specifically, in this embodiment, the flow direction of the hydraulic oil is as follows: Figure 8 and Figure 9 As shown, the hydraulic oil in the fifth oil circuit 411 flows to the sixth oil circuit 412 and the seventh oil circuit 413 through the first shuttle valve 416. The hydraulic oil in the sixth oil circuit 412 flows to V1 of the first hydraulic lock 414. When hydraulic oil flows into V1 of the first hydraulic lock 414, it connects C2 and V2 of the first hydraulic lock 414. The hydraulic oil flows from the fourth oil circuit 47 into the rod chamber of the second cylinder 49. At the same time, the hydraulic oil in the seventh oil circuit 413 flows to V3 of the second hydraulic lock 415. When hydraulic oil flows into V3 of the second hydraulic lock 415, it connects C4 and V4 of the second hydraulic lock 415. The hydraulic oil flows from the third oil passage 46 into the rodless chamber of the second cylinder 49. At this time, the hydraulic oil flows freely between the rod chamber and the rodless chamber of the second cylinder 49. The second cylinder 49 automatically unlocks. When the first cylinder 48 drives the first boom 22 of the boom mechanism 2 to retract upward, it also drives the piston rod of the second cylinder 49 to retract. When the piston rod of the second cylinder 49 retracts, it drives the multi-stage first telescopic drain pipe 32 of the first water supply and drainage mechanism 3 to retract upward. Within the stroke range, the second cylinder 49 retracts along with the retraction of the first cylinder 48, maintaining the same retraction length.

[0173] At this time, the boom mechanism 2 and the multi-stage first telescopic drainage pipe 32 of the first water supply and drainage mechanism 3 simultaneously slide upward and retract. During this process, there is no need to control the second cylinder 49 separately. While controlling the first cylinder 48, the second cylinder 49 is unlocked. The second cylinder 49 is in a free state at this time. Driven by the boom mechanism 2, the second cylinder 49 slides upward and retracts. The upward sliding and retraction of the second cylinder 49 drives the multi-stage first telescopic drainage pipe 32 of the first water supply and drainage mechanism 3 to slide upward and retract. This reduces the operation steps of controlling the second cylinder 49 separately, making the operation simple and improving the timeliness of emergency rescue.

[0174] S30: The second cylinder 49 extends, energizing YV3 of the second control valve 43. The valve core of the second control valve 43 actuates, and the hydraulic oil flows as follows... Figure 10 As shown, hydraulic oil flows to the third oil passage 46 and the eighth oil passage 417; the hydraulic oil in the eighth oil passage 417 flows to the ninth oil passage 418 through the second shuttle valve 419, and the hydraulic oil in the ninth oil passage 418 flows to the sixth oil passage 412 and the seventh oil passage 413 through the third shuttle valve 420. The hydraulic oil in the seventh oil passage 413 flows to V3 of the second hydraulic lock 415. When hydraulic oil flows into V3 of the second hydraulic lock 415, it connects C4 and V4 of the second hydraulic lock 415. The hydraulic oil flows from the third oil passage 46 into the rodless chamber of the second cylinder 49. At this time, the hydraulic oil in the third oil passage 46 flows through the second hydraulic lock 415. The piston rod of the second cylinder 49 extends into the rodless chamber, causing it to extend. This extension of the piston rod drives the multi-stage first telescopic drain pipe 32 of the first water supply and drainage mechanism 3 to extend upwards. Simultaneously, hydraulic oil from the sixth oil circuit 412 flows to V1 of the first hydraulic lock 414. When hydraulic oil flows into V1 of the first hydraulic lock 414, it connects C2 and V2, unlocking the first hydraulic lock 414. The hydraulic oil in the second cylinder 49 then flows out from the rod chamber to the fourth oil circuit 47, returning to the hydraulic oil tank 41. Due to the higher pressure of the hydraulic oil flowing out of the rod chamber of the second cylinder 49, it returns to the hydraulic oil tank 41 from the fourth oil circuit 47. When the second cylinder 49 is operated independently, its extended state does not affect the working state of the first cylinder 48.

[0175] S40: The second cylinder 49 retracts, energizing YV4 of the second control valve 43. The valve core of the second control valve 43 actuates, and the hydraulic oil flows as follows... Figure 11As shown, hydraulic oil flows to the fourth oil passage 47 and the eighth oil passage 417; the hydraulic oil in the eighth oil passage 417 flows to the ninth oil passage 418 through the second shuttle valve 419, and the hydraulic oil in the ninth oil passage 418 flows to the sixth oil passage 412 and the seventh oil passage 413 through the third shuttle valve 420. The hydraulic oil in the sixth oil passage 412 flows to V1 of the first hydraulic lock 414. When hydraulic oil flows into V1 of the first hydraulic lock 414, it connects C2 and V2 of the first hydraulic lock 414, unlocking the first hydraulic lock 414. Hydraulic oil flows from the fourth oil passage 47 into the rod chamber of the second cylinder 49. At this time, the hydraulic oil in the fourth oil passage 47 flows through the first... Hydraulic lock 414 flows into the rod chamber of the second cylinder 49, causing the piston rod of the second cylinder 49 to retract. The retraction of the piston rod of the second cylinder 49, in turn, drives the multi-stage first telescopic drain pipe 32 of the first water supply and drainage mechanism 3 to retract downwards. Simultaneously, hydraulic oil in the seventh oil circuit 413 flows to V3 of the second hydraulic lock 415. When hydraulic oil flows into V3 of the second hydraulic lock 415, it connects C4 and V4 of the second hydraulic lock 415, unlocking the second hydraulic lock 415. Hydraulic oil in the second cylinder 49 flows out from the rodless chamber of the second cylinder 49 to the third oil circuit 46, and then flows back to the hydraulic oil tank 41 from the third oil circuit 46. Because the pressure of the hydraulic oil flowing out of the rodless chamber of the second cylinder 49 is relatively high, the hydraulic oil flowing out of the rodless chamber of the second cylinder 49 flows back to the hydraulic oil tank 41 from the third oil circuit 46. When the second cylinder 49 is operated independently, the second cylinder 49 retracts independently without affecting the operation of the first cylinder 48.

[0176] 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 hydraulic system for a water supply and drainage vehicle, characterized in that, include: A hydraulic oil tank, used to store hydraulic oil; The first oil cylinder is connected to the hydraulic oil tank through an oil circuit. The first oil cylinder is used to drive the boom mechanism on the water supply and drainage vehicle to extend and slide, so as to move closer to or away from the water intake point. The second oil cylinder is connected to the hydraulic oil tank through an oil circuit. The second oil cylinder is used to drive the multi-stage first telescopic drain pipe of the first water supply and drainage mechanism on the water supply and drainage vehicle to extend and slide, so as to move closer to or away from the water supply point. The first control valve has its inlet connected to the hydraulic oil tank via a pipeline, and its return port connected to the hydraulic oil tank via a pipeline. The second control valve has its inlet connected to the hydraulic oil tank via a pipeline, and its return port connected to the hydraulic oil tank via a pipeline. The first oil circuit has one end connected to the first control valve and the other end connected to the rodless chamber of the first oil cylinder. The second oil circuit has one end connected to the first control valve and the other end connected to the rod chamber of the first oil cylinder. The third oil circuit has one end connected to the second control valve and the other end connected to the rodless chamber of the second oil cylinder. The fourth oil circuit has one end connected to the second control valve and the other end connected to the rod chamber of the second oil cylinder. And an oil circuit connection mechanism, which is used to connect the oil circuit between the first oil cylinder and the second oil cylinder, so that the first oil cylinder drives the boom mechanism on the water supply and drainage vehicle to extend and slide while unlocking the second oil cylinder, so that the boom mechanism extends and slides while driving the second oil cylinder to extend and slide, and when the second oil cylinder extends and slides, it drives the multi-stage first telescopic drainage pipe of the first water supply and drainage mechanism to extend and slide. The water supply and drainage vehicle includes a body and a boom mechanism; The boom mechanism is mounted on the vehicle body and is hinged to the vehicle body.

2. The hydraulic system of the water supply and drainage vehicle according to claim 1, characterized in that: The oil circuit connection mechanism includes a fifth oil circuit, a sixth oil circuit, a seventh oil circuit, a first hydraulic lock, a second hydraulic lock, and a first shuttle valve; One end of the fifth oil circuit is connected to the first oil circuit, and the other end of the fifth oil circuit is connected to the second oil circuit; The first shuttle valve is located on the fifth oil line; The first hydraulic lock is disposed on the fourth oil line, and the second hydraulic lock is disposed on the third oil line; One end of the sixth oil circuit is connected to the first shuttle valve, and the other end of the sixth oil circuit is connected to the first hydraulic lock; One end of the seventh oil circuit is connected to the sixth oil circuit, and the other end of the seventh oil circuit is connected to the second hydraulic lock.

3. The hydraulic system of the water supply and drainage vehicle according to claim 1, characterized in that: The oil circuit connection mechanism includes a fifth oil circuit, a sixth oil circuit, a seventh oil circuit, a first hydraulic lock, a second hydraulic lock, and a first shuttle valve; The hydraulic system also includes an eighth oil circuit, a ninth oil circuit, a second shuttle valve, and a third shuttle valve; One end of the fifth oil circuit is connected to the first oil circuit, and the other end of the fifth oil circuit is connected to the second oil circuit; The first shuttle valve is located on the fifth oil line; One end of the eighth oil circuit is connected to the third oil circuit, and the other end of the eighth oil circuit is connected to the fourth oil circuit; The second shuttle valve is located on the eighth oil line; One end of the ninth oil circuit is connected to the first shuttle valve, and the other end of the ninth oil circuit is connected to the second shuttle valve; The third shuttle valve is located on the ninth oil line; The first hydraulic lock is disposed on the fourth oil line, and the second hydraulic lock is disposed on the third oil line; One end of the sixth oil circuit is connected to the third shuttle valve, and the other end of the sixth oil circuit is connected to the first hydraulic lock; One end of the seventh oil circuit is connected to the sixth oil circuit, and the other end of the seventh oil circuit is connected to the second hydraulic lock.

4. The hydraulic system of the water supply and drainage vehicle according to claim 1, characterized in that: The hydraulic system further includes a first oil inlet circuit, a second oil inlet circuit, a first oil return circuit, and a second oil return circuit; One end of the first oil inlet is connected to the hydraulic oil tank, and the other end of the first oil inlet is connected to the first control valve. One end of the second oil inlet passage is connected to the first oil inlet passage, and the other end of the second oil inlet passage is connected to the second control valve; One end of the first return oil circuit is connected to the hydraulic oil tank, and the other end of the first return oil circuit is connected to the first control valve. One end of the second return oil circuit is connected to the first return oil circuit, and the other end of the second return oil circuit is connected to the second control valve.

5. The hydraulic system of the water supply and drainage vehicle according to claim 1, characterized in that: The boom mechanism includes a tilting boom and a first boom; The tilting boom is hinged to the vehicle body, and the first boom is mounted on the tilting boom and slidably connected to the tilting boom; The first hydraulic cylinder is used to drive the first boom to extend and slide on the tilting boom.

6. The hydraulic system of the water supply and drainage vehicle according to claim 5, characterized in that: The water supply and drainage vehicle also includes a first water supply and drainage mechanism, the boom mechanism is used to support the first water supply and drainage mechanism, and the first water supply and drainage mechanism is used to perform drainage operations and / or water supply operations. The first water supply and drainage mechanism is mounted on the first boom; The first water supply and drainage mechanism is fixedly connected to the first boom; or The first water supply and drainage mechanism is slidably connected to the first boom.

7. The hydraulic system of the water supply and drainage vehicle according to claim 6, characterized in that: The first water supply and drainage mechanism includes multi-stage first telescopic drainage pipes and a main drainage pipe; The main drainage pipe is mounted on the boom mechanism; The multi-stage first telescopic drain pipe is nested inside the main drain pipe, and the first end of the multi-stage first telescopic drain pipe is slidably connected to one end of the main drain pipe. The multi-stage first telescopic drain pipe extends upward along the length of the boom mechanism; or The multi-stage first telescopic drainage pipe extends downward along the length of the boom mechanism; The multi-stage first telescopic drain pipes are nested and slidably connected to each other, and the multi-stage first telescopic drain pipes are interconnected. The first end of each multi-stage first telescopic drain pipe is connected to the main drain pipe. One end of the second hydraulic cylinder is mounted on the first boom, and the other end of the second hydraulic cylinder is mounted at the end of the multi-stage first telescopic drain pipe; The second hydraulic cylinder is used to drive the multi-stage first telescopic drain pipe to extend and slide.

8. The hydraulic system of the water supply and drainage vehicle according to claim 7, characterized in that: The multi-stage first telescopic drain pipe includes a first drain pipe and a second drain pipe; The first drain pipe is nested and connected to the inner wall of the main drain pipe, and one end of the first drain pipe is slidably connected to one end of the main drain pipe. The second drain pipe is nested and connected to the inner wall of the first drain pipe, and one end of the second drain pipe is slidably connected to the other end of the first drain pipe. The other end of the second cylinder is mounted on the second drain pipe.

9. The hydraulic system of the water supply and drainage vehicle according to claim 7, characterized in that: The first water supply and drainage mechanism also includes multi-stage second telescopic drainage pipes and a pump body; The hydraulic system also includes multiple third cylinders; The multi-stage second telescopic drain pipe is arranged opposite to the multi-stage first telescopic drain pipe; The multi-stage second telescopic drain pipe is nested inside the main drain pipe. The first end of the multi-stage second telescopic drain pipe is slidably connected to the other end of the main drain pipe. The end of the multi-stage second telescopic drain pipe is connected to the pump body. The multi-stage second telescopic drain pipe extends downward along the length of the boom mechanism. The multi-stage second telescopic drain pipes are nested and slidably connected to each other, and the multi-stage second telescopic drain pipes are interconnected. The first end of each multi-stage second telescopic drain pipe is connected to the main drain pipe. The plurality of third hydraulic cylinders are respectively disposed on the multi-stage second telescopic drain pipe, and the plurality of third hydraulic cylinders are respectively used to drive the multi-stage second telescopic drain pipe to extend and slide along the length direction of the boom mechanism.

10. The hydraulic system of the water supply and drainage vehicle according to claim 9, characterized in that: The multi-stage second telescopic drain pipe includes a third drain pipe and a fourth drain pipe; The third drain pipe is nested within the inner wall of the main drain pipe, with one end of the third drain pipe slidably connected to the other end of the main drain pipe. The fourth drain pipe is nested within the inner wall of the third drain pipe, with one end of the fourth drain pipe slidably connected to the other end of the third drain pipe.

11. A hydraulic system control method for a water supply and drainage vehicle, characterized in that, The hydraulic control method of the drainage vehicle is applied to the water supply and drainage vehicle as described in any one of claims 1 to 10 above; The hydraulic control method for the drainage vehicle includes the following steps: S10: The first cylinder extends, energizing YV2, which controls the first control valve. The valve core of the first control valve moves, and the hydraulic oil flows to the first oil circuit and the fifth oil circuit. The hydraulic oil in the first oil circuit flows into the rodless chamber of the first oil cylinder, thereby causing the piston rod of the first oil cylinder to extend. The extension of the piston rod of the first oil cylinder drives the first boom of the boom mechanism to extend downward. The hydraulic oil in the fifth oil circuit flows to the sixth and seventh oil circuits. The hydraulic oil in the sixth oil circuit flows to the fourth oil circuit, and the hydraulic oil flows from the fourth oil circuit into the rod chamber of the second oil cylinder. At the same time, the hydraulic oil in the seventh oil circuit flows to the third oil circuit, and the hydraulic oil flows from the third oil circuit into the rodless chamber of the second oil cylinder. At this time, the hydraulic oil flows freely between the rod chamber and the rodless chamber of the second oil cylinder. The second oil cylinder automatically unlocks. When the first oil cylinder drives the first boom of the boom mechanism to extend downward, it drives the piston rod of the second oil cylinder to extend. When the piston rod of the second oil cylinder extends, it drives the multi-stage first telescopic drain pipe of the first water supply and drainage mechanism to extend downward. S20: The first cylinder retracts, energizing YV1, which controls the first control valve. The valve core of the first control valve moves, and the hydraulic oil flows to the second and fifth oil circuits. The hydraulic oil in the second oil circuit flows into the rod chamber of the first oil cylinder, causing the piston rod of the first oil cylinder to retract. The retraction of the piston rod of the first oil cylinder drives the first boom of the boom mechanism to retract upward. The hydraulic oil in the fifth oil circuit flows to the sixth and seventh oil circuits. The hydraulic oil in the sixth oil circuit flows to the fourth oil circuit, and the hydraulic oil flows from the fourth oil circuit into the rod chamber of the second oil cylinder. At the same time, the hydraulic oil in the seventh oil circuit flows to the third oil circuit, and the hydraulic oil flows from the third oil circuit into the rodless chamber of the second oil cylinder. At this time, the hydraulic oil flows freely between the rod chamber and the rodless chamber of the second oil cylinder. The second oil cylinder automatically unlocks. When the first oil cylinder drives the first boom of the boom mechanism to retract upward, it also drives the piston rod of the second oil cylinder to retract. When the piston rod of the second oil cylinder retracts, it drives the multi-stage first telescopic drain pipe of the first water supply and drainage mechanism to retract upward.

12. The hydraulic system control method for a water supply and drainage vehicle according to claim 11, characterized in that: The hydraulic control method for the water supply and drainage vehicle also includes the following steps: S30: The second cylinder extends, energizing YV3, which controls the second control valve. The valve core of the second control valve moves, and the hydraulic oil flows to the third and eighth oil circuits. The hydraulic oil in the eighth oil circuit flows to the ninth oil circuit through the second shuttle valve. The hydraulic oil in the ninth oil circuit flows to the sixth and seventh oil circuits through the third shuttle valve. The hydraulic oil in the seventh oil circuit flows to V3 of the second hydraulic lock. When hydraulic oil flows into V3 of the second hydraulic lock, it connects C4 and V4 of the second hydraulic lock. The hydraulic oil flows from the third oil circuit into the rodless chamber of the second cylinder. At this time, the hydraulic oil in the third oil circuit flows into the rodless chamber of the second cylinder through the second hydraulic lock, thereby causing the piston rod of the second cylinder to extend. The extension of the piston rod of the second cylinder drives the multi-stage first telescopic drain pipe of the first water supply and drainage mechanism to extend upward. At the same time, the hydraulic oil in the sixth oil circuit flows to V1 of the first hydraulic lock. When the hydraulic oil flows into V1 of the first hydraulic lock, it connects C2 and V2 of the first hydraulic lock, unlocking the first hydraulic lock. The hydraulic oil in the second oil cylinder flows out from the rod chamber of the second oil cylinder to the fourth oil circuit, and the hydraulic oil flows back to the hydraulic oil tank from the fourth oil circuit.

13. The hydraulic system control method for a water supply and drainage vehicle according to claim 11 or 12, characterized in that: The hydraulic control method for the water supply and drainage vehicle also includes the following steps: S40: The second cylinder retracts, energizing the YV4 control valve of the second control valve, causing the valve core of the second control valve to move, and the hydraulic oil flows to the fourth and eighth oil circuits. The hydraulic oil in the eighth oil circuit flows to the ninth oil circuit through the second shuttle valve. The hydraulic oil in the ninth oil circuit flows to the sixth and seventh oil circuits through the third shuttle valve. The hydraulic oil in the sixth oil circuit flows to V1 of the first hydraulic lock. When hydraulic oil flows into V1 of the first hydraulic lock, it connects C2 and V2 of the first hydraulic lock, unlocking the first hydraulic lock. The hydraulic oil flows from the fourth oil circuit into the rod chamber of the second cylinder. At this time, the hydraulic oil in the fourth oil circuit flows into the rod chamber of the second cylinder through the first hydraulic lock, causing the piston rod of the second cylinder to retract. The retraction of the piston rod of the second cylinder drives the multi-stage first telescopic drain pipe of the first water supply and drainage mechanism to retract downward. At the same time, the hydraulic oil in the seventh oil circuit flows to V3 of the second hydraulic lock. When the hydraulic oil flows into V3 of the second hydraulic lock, it connects C4 and V4 of the second hydraulic lock, unlocking the second hydraulic lock. The hydraulic oil in the second cylinder flows out from the rodless chamber of the second cylinder to the third oil circuit, and the hydraulic oil flows back to the hydraulic oil tank from the third oil circuit.

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