Drainage vehicle hydraulic system and drainage vehicle

Abstract

A drainage vehicle hydraulic system (1), and a drainage vehicle. One end of an oil outlet pipe (12) is connected to an oil supply mechanism (11), and the other end of the oil outlet pipe (12) is connected to a hydraulic motor (13). One end of an oil return pipe (14) is connected to the hydraulic motor (13), and the other end of the oil return pipe (14) is connected to the oil supply mechanism (11). The oil supply mechanism (11) is used to provide hydraulic oil, and the hydraulic motor (13) drives an operation apparatus (9) of the drainage vehicle to operate. A venturi tube (16) is disposed on the oil return pipe (14), and the venturi tube (16) is connected to the oil return pipe (14). One end of a first oil pipe (15) is connected to a housing oil return port of the hydraulic motor (13), and the other end of the first oil pipe (15) is connected to the venturi tube (16).

Description

Hydraulic system of drainage vehicle and drainage vehicle Technical Field

[0001] The utility model relates to the technical field of emergency drainage equipment, in particular to a hydraulic system of a drainage vehicle and the drainage vehicle. Background Art

[0002] As one of the most commonly used emergency rescue equipment, drainage trucks are often used for drainage, flood control, and waterlogging. They are also used for irrigation in agriculture and urban greening. When in use, drainage trucks use the drainage device on the drainage truck to drain water from potholes, ditches, and rivers.

[0003] Currently, hydraulic power is provided to the entire vehicle body by a hydraulic system. During operation, due to the need for cooling and lubrication of the hydraulic motor of the hydraulic system, some hydraulic oil needs to be returned to the hydraulic oil tank through a separate housing oil return port using an oil pipe. Since the oil line from the housing oil return port to the hydraulic oil tank is long, the installation of a long oil pipe requires more installation space and time, which brings great inconvenience to on-site construction, layout, and deployment, and also increases manufacturing costs. Utility Model Content

[0004] To this end, it is necessary to provide a hydraulic system and a drainage vehicle for a drainage vehicle, which are used to solve the problem that due to the need for cooling and lubrication of the hydraulic motor of the hydraulic system of the drainage vehicle during operation, part of the hydraulic oil needs to pass through a separate shell return oil port and be connected to the hydraulic oil tank using an oil pipe. Since the oil path from the shell return oil port to the hydraulic oil tank is long, the arrangement of the longer oil pipe requires more installation space and arrangement time, which brings great inconvenience to on-site construction, arrangement, and deployment, and also increases the technical problem of manufacturing cost.

[0005] To achieve the above-mentioned object, the inventor provides a hydraulic system for a drainage vehicle, comprising an oil supply mechanism, an oil outlet pipe, a hydraulic motor, an oil return pipe, a first oil pipe, and a venturi tube;

[0006] One end of the oil outlet pipe is connected to the oil supply mechanism, and the other end of the oil outlet pipe is connected to the hydraulic motor;

[0007] One end of the oil return pipe is connected to the hydraulic motor, and the other end of the oil return pipe is connected to the oil supply mechanism;

[0008] The oil supply mechanism is used to provide hydraulic oil, and the hydraulic motor is used to drive the working device of the drainage vehicle to perform operations;

[0009] The venturi tube is arranged on the oil return pipe, and the venturi tube is connected to the oil return pipe;

[0010] One end of the first oil pipe is connected to the oil return port of the housing of the hydraulic motor, and the other end of the first oil pipe is connected to the Venturi tube.

[0011] As a preferred structure of the present invention, the Venturi tube is arranged on the oil return pipe close to the hydraulic motor.

[0012] As a preferred structure of the present invention, the venturi tube includes a contraction tube, a throat tube and a diffusion tube;

[0013] The contraction tube, the throat tube and the diffusion tube are connected to each other in sequence; or

[0014] The shrink tube, the throat tube and the diffuser tube are integrally formed in sequence;

[0015] The contraction tube and the diffusion tube are respectively connected to the oil return pipe;

[0016] The other end of the first oil pipe is connected to the throat pipe.

[0017] As a preferred structure of the present invention, the venturi tube includes an inlet tube, a contraction tube, a throat tube and a diffusion tube;

[0018] The inlet pipe, the contraction pipe, the throat pipe and the diffusion pipe are connected to each other in sequence; or

[0019] The inlet pipe, the contraction pipe, the throat pipe and the diffusion pipe are integrally formed in sequence;

[0020] The inlet pipe and the diffuser pipe are respectively connected to the oil return pipe;

[0021] The other end of the first oil pipe is connected to the throat pipe.

[0022] As a preferred structure of the present invention, the oil supply mechanism includes a hydraulic oil tank and a hydraulic pump, one end of the oil outlet pipe is connected to the hydraulic oil tank, the hydraulic pump is arranged on the oil outlet pipe, and the other end of the oil return pipe is connected to the hydraulic oil tank.

[0023] As a preferred structure of the present invention, the hydraulic system of the drainage vehicle also includes a reversing valve, which is arranged on the oil outlet pipe and the oil return pipe, and the Venturi tube is arranged on the oil return pipe between the reversing valve and the oil supply mechanism.

[0024] Different from the prior art, the beneficial effects of the above technical solution are as follows: the hydraulic system of a drainage vehicle of the utility model includes an oil supply mechanism, an oil outlet pipe, a hydraulic motor, an oil return pipe, a first oil pipe and a Venturi tube; one end of the oil outlet pipe is connected to the oil supply mechanism, and the other end of the oil outlet pipe is connected to the hydraulic motor; one end of the return oil pipe is connected to the hydraulic motor, and the other end of the return oil pipe is connected to the oil supply mechanism; the oil supply mechanism is used to provide hydraulic oil, and the hydraulic motor is used to drive the operating device of the drainage vehicle to operate; the Venturi tube is arranged on the return oil pipe, and the Venturi tube is connected to the return oil pipe; one end of the first oil pipe is connected to the oil return port of the housing of the hydraulic motor, and the other end of the first oil pipe is connected to the Venturi tube. A Venturi tube is provided on the oil outlet pipe, and the oil return port of the hydraulic motor casing is connected to the Venturi tube through the first oil pipe. The Venturi effect generated when the hydraulic system returns oil is used to bring the oil return from the hydraulic motor casing to the oil supply mechanism. Since the Venturi tube is provided on the oil return pipe, the oil return port of the hydraulic motor casing is connected to the Venturi tube through the first oil pipe. Compared with the length of the existing oil circuit from the oil return port of the casing to the hydraulic oil tank, the arrangement length of the first oil pipe is shorter, which greatly shortens the arrangement length of the first oil pipe, simplifies the arrangement of the on-site oil pipes, shortens the deployment time of the drainage vehicle equipment, improves work efficiency, and reduces manufacturing costs.

[0025] To achieve the above purpose, the inventor provides a drainage vehicle, including an operating device and

[0026] A hydraulic system for a drainage vehicle as provided by any one of the above inventors;

[0027] The hydraulic system of the drainage vehicle is used to provide hydraulic power to the working device, thereby driving the working device to perform operations.

[0028] As a preferred structure of the present invention, the operating device is a water pump, and the water pump is used for drainage operation; or

[0029] The operating device is a winch component, and the winch component is used to retract and extend the water hose or oil pipe on the drainage vehicle; or

[0030] The working device is a cooler component, and the cooler component is used to cool the hydraulic oil of the hydraulic system; or

[0031] The operating device is a turntable component, and the turntable component is used to drive the rotary mechanism of the drainage vehicle to rotate.

[0032] As a preferred structure of the present invention, the operating device is a water pump, and the water pump is used for drainage operation;

[0033] The drainage vehicle also includes a frame, a lifting mechanism, an arm, a multi-stage telescopic drainage pipe and a driving mechanism;

[0034] The arm is hinged to the frame;

[0035] One end of the lifting mechanism is connected to the vehicle frame, and the other end of the lifting mechanism is connected to the arm, and the lifting mechanism is used to flip the arm;

[0036] The multi-stage telescopic drain pipe is arranged on the arm, and the multi-stage telescopic drain pipes are nested and slidably connected with each other, and the driving mechanism is used to drive the multi-stage telescopic drain pipe to extend and retract;

[0037] The water pump is connected to the water inlet of the multi-stage telescopic drainage pipe.

[0038] As a preferred structure of the present invention, the drainage vehicle further includes a translation mechanism and a rotation mechanism;

[0039] The translation mechanism is arranged on the vehicle frame, the slewing mechanism is arranged on the translation mechanism, the arm is hinged to the slewing mechanism, and one end of the lifting mechanism is connected to the slewing mechanism;

[0040] The translation mechanism is used to translate the slewing mechanism and the arm to move away from or closer to the vehicle frame;

[0041] The slewing mechanism is used for slewing the arm left and right.

[0042] Different from the prior art, the beneficial effects of the above technical solution are as follows: the present invention provides a drainage vehicle, wherein the hydraulic system of the drainage vehicle is provided with a Venturi tube on the oil outlet pipe, and the housing oil return port of the hydraulic motor is connected to the throttle port of the Venturi tube through a first oil pipe. The Venturi effect generated when the hydraulic system returns oil is utilized to bring the housing oil return of the hydraulic motor back to the oil supply mechanism. Because the Venturi tube is provided on the oil return pipe, the housing oil return port of the hydraulic motor is connected to the Venturi tube through the first oil pipe. Compared with the length of the existing oil circuit from the housing oil return port to the hydraulic oil tank, the layout length of the first oil pipe is shorter, greatly shortening the layout length of the first oil pipe, simplifying the layout of the on-site oil pipe, shortening the deployment time of the drainage vehicle equipment, improving operational efficiency, and reducing manufacturing costs.

[0043] The above-mentioned records related to the content of the utility model are only an overview of the technical solution of this application. In order to enable ordinary technicians in this field to understand the technical solution of this application more clearly, and then implement it according to the text of the specification and the contents recorded in the drawings, and to make the above-mentioned purposes and other purposes, features and advantages of this application easier to understand, the following is an explanation in combination with the specific implementation methods and drawings of this application. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] The accompanying drawings are only used to illustrate the principles, implementation methods, applications, characteristics and effects of the specific embodiments of this application and other related contents, and are not to be considered as limiting this application.

[0045] In the drawings of the specification:

[0046] FIG1 is a schematic diagram of a hydraulic system of a drainage vehicle according to a specific embodiment;

[0047] FIG2 is a second schematic diagram of the hydraulic system of the drainage vehicle according to the specific embodiment;

[0048] FIG3 is a third schematic diagram of the hydraulic system of the drainage vehicle according to the specific embodiment;

[0049] FIG4 is a fourth schematic diagram of the hydraulic system of the drainage vehicle according to the specific embodiment;

[0050] FIG5 is a schematic structural diagram of a venturi tube according to a specific embodiment;

[0051] FIG6 is a second structural diagram of the Venturi tube according to the specific embodiment;

[0052] FIG7 is a schematic structural diagram of the drainage vehicle according to a specific embodiment.

[0053] The reference numerals in the above drawings are described as follows:

[0054] hydraulic system,

[0055] Oil supply mechanism,

[0056] Hydraulic oil tank,

[0057] hydraulic pumps,

[0058] Oil outlet pipe,

[0059] Hydraulic motor,

[0060] Oil return pipe,

[0061] First oil pipeline,

[0062] Venturi tube,

[0063] Inlet pipe,

[0064] Shrink tubing,

[0065] throat,

[0066] diffuser tube,

[0067] reversing valve,

[0068] Frame,

[0069] Translation mechanism,

[0070] Rotating mechanism,

[0071] Lifting mechanism,

[0072] boom,

[0073] Multi-stage telescopic drain pipe,

[0074] Drive mechanism,

[0075] operating equipment;

[0076] water pump,

[0077] Winch parts. DETAILED DESCRIPTION

[0078] 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.

[0079] 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.

[0080] 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.

[0081] 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.

[0082] 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.

[0083] 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.

[0084] 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 two or more (including two), and similar expressions related to "multiple," such as "multiple groups" and "multiple times," are also understood in this manner, unless otherwise specifically defined.

[0085] 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, and therefore cannot be understood as a limitation on the embodiments of the present application. In addition, in the context, it is also necessary to understand that when it is mentioned that an element is connected to another element "on" or "under", it can not only be directly connected to the other element "on" or "under", but also be indirectly connected to the other element "on" or "under" through an intermediate element.

[0086] 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.

[0087] Please refer to Figures 1 to 7. This embodiment relates to a hydraulic system of a drainage vehicle, including an oil supply mechanism 11, an oil outlet pipe 12, a hydraulic motor 13, an oil return pipe 14, a first oil pipe 15 and a Venturi tube 16; one end of the oil outlet pipe 12 is connected to the oil supply mechanism 11, and the other end of the oil outlet pipe 12 is connected to the hydraulic motor 13; one end of the return oil pipe 14 is connected to the hydraulic motor 13, and the other end of the return oil pipe 14 is connected to the oil supply mechanism; the oil supply mechanism 11 is used to provide hydraulic oil, and the hydraulic motor 13 is used to drive the operating device 9 of the drainage vehicle to operate; the Venturi tube 16 is arranged on the return oil pipe 14, and the Venturi tube 16 is connected to the return oil pipe 14; one end of the first oil pipe 15 is connected to the oil return port of the housing of the hydraulic motor 13, and the other end of the first oil pipe 15 is connected to the Venturi tube 16.

[0088] Specifically, the hydraulic system 1 of the drainage vehicle in this embodiment has a Venturi tube 16 installed on the oil outlet pipe 12. The oil return port of the hydraulic motor 13 is connected to the throttle port of the Venturi tube 16 via a first oil pipe 15. The Venturi effect generated when the hydraulic system 1 returns oil is used to bring the oil return from the hydraulic motor 13 back to the oil supply mechanism 11. Specifically, as shown in Figures 1 and 2, because the Venturi tube 16 is installed on the oil return pipe 14 and the oil return port of the hydraulic motor 13 is connected to the Venturi tube 16 via the first oil pipe 15, the length of the first oil pipe 15 is shorter than the length of the existing oil path from the oil return port to the hydraulic oil tank. This significantly reduces the length of the first oil pipe 15, simplifies the layout of the oil pipes on site, shortens the deployment time of the drainage vehicle equipment, improves operational efficiency, and reduces manufacturing costs. It should be noted that the Venturi effect is the phenomenon in which the flow velocity of a fluid increases when passing through a narrowing flow cross-section, and the flow velocity is inversely proportional to the flow cross-section. Bernoulli's principle states that an increase in flow rate is accompanied by a decrease in fluid pressure, a phenomenon commonly known as the Venturi effect. In layman's terms, the Venturi effect refers to the low pressure generated near a high-speed flowing fluid, which creates an adsorption effect. Specifically, in this embodiment, when the hydraulic system 1 returns oil, the hydraulic oil flows from the return oil pipe 14 into the Venturi tube 16. At this time, the hydraulic oil's flow rate in the Venturi tube 16 increases, and the low pressure generated within the Venturi tube 16 creates an adsorption effect, bringing the oil returned from the casing of the hydraulic motor 13 back to the oil supply mechanism 11.

[0089] Preferably, in this embodiment, as shown in Figures 1 and 2, the Venturi tube 16 is disposed on the oil return pipe 14 near the hydraulic motor 13, thereby significantly shortening the layout length of the first oil pipe 15. Specifically, since the Venturi tube 16 is disposed on the oil return pipe 14, the housing oil return port of the hydraulic motor 13 is connected to the Venturi tube 16 via the first oil pipe 15. Compared to the length of the existing oil circuit from the housing oil return port to the hydraulic oil tank, the layout length of the first oil pipe 15 is shorter, greatly shortening the layout length of the first oil pipe 15, simplifying the layout of the on-site oil pipes, shortening the deployment time of the drainage vehicle equipment, improving operational efficiency, and reducing manufacturing costs.

[0090] According to some embodiments of the present application, as shown in Figures 5 and 6 , the Venturi tube 16 optionally includes an inlet pipe 161, a contraction pipe 162, a throat pipe 163, and a diffuser 164; the inlet pipe 161, the contraction pipe 162, the throat pipe 163, and the diffuser 164 are sequentially welded and fixedly connected to each other; or in other embodiments, the inlet pipe 161, the contraction pipe 162, the throat pipe 163, and the diffuser 164 are sequentially integrally formed. This integral forming process helps improve the strength and hardness of the Venturi tube 16 and prolongs the service life of the Venturi tube 16. The inlet pipe 161 and the diffuser 164 are respectively connected to the oil return pipe 14; the other end of the first oil pipe 15 is connected to the throat pipe 163. Specifically, in the hydraulic system 1 of the drainage vehicle in this embodiment, a venturi tube 16 is provided on the oil outlet pipe 12, and the housing oil return port of the hydraulic motor 13 is connected to the throat 163 of the venturi tube 16 through the first oil pipe 15. The housing oil return port of the hydraulic motor 13 is brought back to the oil supply mechanism 11 by utilizing the Venturi effect generated when the hydraulic system 1 returns oil. Since the venturi tube 16 is provided on the return oil pipe 14, the housing oil return port of the hydraulic motor 13 is connected to the venturi tube 16 through the first oil pipe 15. Compared with the length of the existing oil circuit from the housing oil return port to the hydraulic oil tank, the layout length of the first oil pipe 15 is shorter, greatly shortening the layout length of the first oil pipe 15, simplifying the layout of the on-site oil pipe, shortening the deployment time of the drainage vehicle equipment, improving operational efficiency, and reducing manufacturing costs. It should be noted that the structure of the venturi tube 16 in this embodiment is not limited to this. Those skilled in the art can select other suitable venturi tubes 16 based on the teachings of this embodiment.

[0091] According to some embodiments of the present application, the Venturi tube 16 optionally includes a contraction tube 162, a throat tube 163, and a diffuser 164; the contraction tube 162, the throat tube 163, and the diffuser 164 are welded and fixedly connected to each other in sequence; or in other embodiments, the contraction tube 162, the throat tube 163, and the diffuser 164 are integrally formed. This integral forming process improves the strength and hardness of the Venturi tube 16, thereby increasing the service life of the Venturi tube 16. The contraction tube 162 and the diffuser 164 are respectively connected to the oil return pipe 14; the other end of the first oil pipe 15 is connected to the throat tube 163. Specifically, in the hydraulic system 1 of the drainage vehicle in this embodiment, the Venturi tube 16 is provided on the oil outlet pipe 12. The oil return port of the hydraulic motor 13 is connected to the throat tube 163 of the Venturi tube 16 via the first oil pipe 15. The oil return port of the hydraulic motor 13 is brought back to the oil supply mechanism 11 by utilizing the Venturi effect generated when the hydraulic system 1 returns oil. Since the Venturi tube 16 is arranged on the oil return pipe 14, the housing oil return port of the hydraulic motor 13 is connected to the Venturi tube 16 through the first oil pipe 15. Compared with the length of the existing oil circuit from the housing oil return port to the hydraulic oil tank, the layout length of the first oil pipe 15 is shorter, which greatly shortens the layout length of the first oil pipe 15, simplifies the layout of the on-site oil pipes, shortens the deployment time of the drainage vehicle equipment, improves work efficiency, and reduces manufacturing costs.

[0092] According to some embodiments of the present application, optionally, as shown in FIG5 and FIG6, the inlet pipe 161 is a cylindrical tube, that is, the cross-section of the inlet pipe 161 is circular. In other embodiments, the cross-section of the inlet pipe 161 can also be elliptical. The contraction tube 162 is a conical tube; wherein the cone angle of the contraction tube 162 is 19-23°, and the throat pipe 163 is a cylindrical tube, that is, the cross-section of the throat pipe 163 is circular. In other embodiments, the cross-section of the throat pipe 163 can also be elliptical. The diffuser 164 is a conical tube, wherein the cone angle of the diffuser 164 is 8-15°. Specifically, the diameter of the contraction tube 162 gradually decreases in the direction approaching the throat pipe 163, and the diameter of the diffuser 164 gradually increases in the direction away from the throat pipe 163, thereby satisfying the formation of the Venturi effect.

[0093] According to some embodiments of the present application, optionally, as shown in Figures 2 and 4, the oil supply mechanism 11 includes a hydraulic oil tank 111 and a hydraulic pump, one end of the oil outlet pipe 12 is connected to the hydraulic oil tank 111, the hydraulic pump 112 is provided on the oil outlet pipe 12, and the other end of the oil return pipe 14 is connected to the hydraulic oil tank 111. Alternatively, in other embodiments, the oil supply mechanism 11 is another oil source on the drainage vehicle. It should be noted that the structure of the oil supply mechanism 11 of this embodiment is not limited thereto, and those skilled in the art can select other suitable oil supply mechanisms 11 based on the teachings of this embodiment.

[0094] According to some embodiments of the present application, as shown in Figures 3 and 4, the hydraulic system 1 of the drainage vehicle further includes a reversing valve 17, which is disposed on the oil outlet pipe 12 and the oil return pipe 14. The reversing valve 17 is used to achieve the circulation, shutoff, and reversal of the hydraulic oil, as well as pressure unloading and sequential operation control. The venturi tube 16 is disposed on the oil return pipe 14 between the reversing valve 17 and the oil supply mechanism 11. Since the venturi tube 16 is disposed on the oil return pipe 14, away from the hydraulic oil tank 111, the first oil pipe 15 connects the oil return port of the hydraulic motor 13 to the venturi tube 16. Compared with the length of the existing oil circuit from the oil return port to the hydraulic oil tank, the length of the first oil pipe 15 is shortened, greatly reducing the length of the first oil pipe 15, simplifying the on-site oil pipe layout, shortening the deployment time of the drainage vehicle equipment, improving operational efficiency, and reducing manufacturing costs.

[0095] Specifically, in this embodiment, as shown in Figures 1 to 6, a Venturi tube 16 is provided on the oil outlet pipe 12, and the casing oil return port of the hydraulic motor 13 is connected to the throat 163 of the Venturi tube 16 through the first oil pipe 15. When the hydraulic system 1 returns oil, the hydraulic oil flows from the return oil pipe 14 into the Venturi tube 16. At this time, the flow rate of the hydraulic oil in the Venturi tube 16 increases, and the low pressure generated in the Venturi tube 16 generates an adsorption effect to bring the casing return oil of the hydraulic motor 13 back to the hydraulic oil tank 111. Since the Venturi tube 16 is provided on the return oil pipe 14, away from the hydraulic oil tank 111, the casing oil return port of the hydraulic motor 13 is connected to the Venturi tube 16 through the first oil pipe 15. Compared with the length of the existing oil line from the casing oil return port to the hydraulic oil tank, the layout length of the first oil pipe 15 is shorter, which greatly shortens the layout length of the first oil pipe 15, simplifies the layout of the on-site oil pipes, shortens the deployment time of the drainage vehicle equipment, improves work efficiency, and reduces manufacturing costs.

[0096] Referring to Figure 7 , this embodiment relates to a drainage vehicle, comprising an operating device 9 and a hydraulic system 1 similar to the drainage vehicle described in the above embodiment. The hydraulic system 1 of the drainage vehicle is used to provide hydraulic power to the operating device 9, thereby driving the operating device 9 to perform operations. The drainage vehicle is a vertically descending well drainage vehicle or a multi-type drainage vehicle. The drainage vehicle can be a gasoline vehicle, a diesel vehicle, a pure electric vehicle, a hybrid vehicle, or an extended-range vehicle.

[0097] According to some embodiments of the present application, optionally, as shown in FIG7 , the operating device 9 is a water pump 91 for performing drainage operations; or in other embodiments, the operating device 9 is a winch component 92 for retracting and unretracting the water hose or oil pipe on the drainage vehicle, saving time and effort and improving operation efficiency. Alternatively, in other embodiments, the operating device 9 is a cooler component for cooling the hydraulic oil of the hydraulic system 1; or in other embodiments, the operating device 9 is a turntable component for driving the slewing mechanism 4 of the drainage vehicle to rotate.

[0098] According to some embodiments of the present application, the operating device 9 is optionally a water pump 91 for draining water. The drainage vehicle further includes a frame 2, a lifting mechanism 5, an arm 6, a multi-stage telescopic drainage pipe 7, and a drive mechanism 8. The frame 2 serves as the framework of the vehicle and is the foundation of the vehicle. It supports and connects the various components of the vehicle, ensuring that they maintain relative correct positions and withstands various loads inside and outside the drainage vehicle. The arm 6 is hinged to the frame 2 via a hinged plate. One end of the lifting mechanism 5 is connected to the frame 2, and the other end of the lifting mechanism 5 is connected to the arm 6. The lifting mechanism 5 is used to tilt the arm 6 to bring the water pump 91 closer to the water intake point. The lifting mechanism 5 is equipped with a lifting cylinder, and there are two lifting cylinders. In other embodiments, electric lifting cylinders or pneumatic lifting cylinders may also be used. The multi-stage telescopic drainage pipe is mounted on the arm 6, and the arm 6 supports the multi-stage telescopic drainage pipe. The multi-stage telescopic drain pipes are nested and slidably connected with each other, wherein the multi-stage telescopic drain pipes can be three-stage telescopic drain pipes or two-stage telescopic drain pipes, and the three-stage telescopic drain pipes are nested and slidably connected with each other, or the two-stage telescopic drain pipes are nested and slidably connected with each other. It should be noted that the number of multi-stage telescopic drain pipes is not limited in this embodiment. In other embodiments, the multi-stage telescopic drain pipes can be five-stage telescopic drain pipes. The driving mechanism 8 is used to drive the multi-stage telescopic drain pipes to extend and retract; the water pump 91 is connected to the water inlet of the multi-stage telescopic drain pipes. The driving mechanism 8 can use a telescopic oil cylinder, and multiple telescopic oil cylinders can be used to drive the multi-stage telescopic drain pipes to extend and retract, so as to approach the drainage operation point to facilitate the drainage operation. In other embodiments, the driving mechanism 8 can also use a pneumatic cylinder or an electric cylinder.

[0099] Specifically, in this embodiment, as shown in Figure 7, the drainage vehicle further includes a translation mechanism 3 and a slewing mechanism 4. The translation mechanism 3 is mounted on the vehicle frame 2, and the slewing mechanism 4 is mounted on the translation mechanism 3. The arm 6 is hingedly connected to the slewing mechanism 4 via a hinge plate, and one end of the lifting mechanism 5 is connected to the slewing mechanism 4. The translation mechanism 3 is used to translate the slewing mechanism 4 and the arm 6 away from the vehicle frame 2 to facilitate drainage operations, or toward the vehicle frame 2. The translation mechanism 3 includes a translation cylinder and a movable end. The slewing mechanism 4 is mounted on the movable end. The translation cylinder drives the movable end to translate outward, achieving translational movement, allowing the vehicle to approach the work point and facilitate drainage operations. The slewing mechanism 4 is used to rotate the arm 6 left and right to reach the drainage point. The slewing mechanism 4 can be used to rotate the water pump 91 to the left or right side of the vehicle frame 2 to facilitate drainage. The slewing mechanism 4 can utilize a motor-driven slewing bearing to achieve left and right rotation.

[0100] Specifically, in the drainage vehicle of this embodiment, the drainage vehicle is driven to a flat area during operation, and the water pump 91 is moved to the operation point for drainage operation through the cooperation of the translation mechanism 3, the lifting mechanism 5, the rotation mechanism 4 and the driving mechanism 8. The hydraulic system 1 of the drainage vehicle is provided with a venturi tube 16 on the oil outlet pipe 12, and the housing oil return port of the hydraulic motor 13 is connected to the throat 163 of the venturi tube 16 through the first oil pipe 15. When the hydraulic system 1 returns oil, the hydraulic oil flows from the return oil pipe 14 into the venturi tube 16. At this time, the flow rate of the hydraulic oil in the venturi tube 16 increases, and the low pressure generated in the venturi tube 16 generates an adsorption effect to bring the housing return oil of the hydraulic motor 13 back to the hydraulic oil tank 111. Since the venturi tube 16 is provided on the return oil pipe 14, away from the hydraulic oil tank 111, the housing oil return port of the hydraulic motor 13 is connected to the venturi tube 16 through the first oil pipe 15. Compared with the length of the existing oil circuit from the housing oil return port to the hydraulic oil tank, the layout length of the first oil pipe 15 is shorter, which greatly shortens the layout length of the first oil pipe 15, simplifies the layout of the on-site oil pipes, shortens the deployment time of the drainage vehicle equipment, improves work efficiency, and reduces manufacturing costs.

[0101] Finally, it should be noted that although the above embodiments have been described in the specification and drawings of this application, this does not limit the scope of patent protection of this application. All technical solutions generated by replacing or modifying equivalent structures or equivalent processes based on the essential concepts of this application using the contents recorded in the specification and drawings of this application, as well as directly or indirectly implementing the technical solutions of the above embodiments in other related technical fields, are included in the scope of patent protection of this application.

Claims

1. A hydraulic system for a drainage vehicle, characterized in that: It includes an oil supply mechanism, an oil outlet pipe, a hydraulic motor, an oil return pipe, a first oil pipe and a venturi pipe; One end of the oil outlet pipe is connected to the oil supply mechanism, and the other end of the oil outlet pipe is connected to the hydraulic motor; One end of the oil return pipe is connected to the hydraulic motor, and the other end of the oil return pipe is connected to the oil supply mechanism; The oil supply mechanism is used to provide hydraulic oil, and the hydraulic motor is used to drive the working device of the drainage vehicle to perform operations; The venturi tube is arranged on the oil return pipe, and the venturi tube is connected to the oil return pipe; One end of the first oil pipe is connected to the oil return port of the housing of the hydraulic motor, and the other end of the first oil pipe is connected to the Venturi tube.

2. The hydraulic system of the drainage vehicle according to claim 1, characterized in that: The venturi tube is arranged on the oil return pipe close to the hydraulic motor.

3. The hydraulic system of the drainage vehicle according to claim 1 or 2, characterized in that: The venturi tube comprises a contraction tube, a throat tube and a diffusion tube; The contraction tube, the throat tube and the diffusion tube are connected to each other in sequence; or The shrink tube, the throat tube and the diffuser tube are integrally formed in sequence; The contraction tube and the diffusion tube are respectively connected to the oil return pipe; The other end of the first oil pipe is connected to the throat pipe.

4. The hydraulic system of the drainage vehicle according to claim 1 or 2, characterized in that: The venturi tube comprises an inlet tube, a contraction tube, a throat tube and a diffusion tube; The inlet pipe, the contraction pipe, the throat pipe and the diffusion pipe are connected to each other in sequence; or The inlet pipe, the contraction pipe, the throat pipe and the diffusion pipe are integrally formed in sequence; The inlet pipe and the diffuser pipe are respectively connected to the oil return pipe; The other end of the first oil pipe is connected to the throat pipe.

5. The hydraulic system of the drainage vehicle according to claim 1, characterized in that: The oil supply mechanism comprises a hydraulic oil tank and a hydraulic pump. One end of the oil outlet pipe is connected to the hydraulic oil tank. The hydraulic pump is arranged on the oil outlet pipe. The other end of the oil return pipe is connected to the hydraulic oil tank.

6. The hydraulic system of the drainage vehicle according to claim 1, characterized in that: The hydraulic system of the drainage vehicle further comprises a reversing valve, which is arranged on the oil outlet pipe and the oil return pipe, and the venturi tube is arranged on the oil return pipe between the reversing valve and the oil supply mechanism.

7. A drainage vehicle, characterized in that: Including operating equipment and A hydraulic system for a drainage vehicle as claimed in any one of claims 1 to 6; The hydraulic system of the drainage vehicle is used to provide hydraulic power to the working device, thereby driving the working device to perform operations.

8. The drainage vehicle according to claim 7, characterized in that: The operating device is a water pump, and the water pump is used for drainage operation; or The working device is a winch component, and the winch component is used to retract and release the water hose or oil pipe on the drainage vehicle; or The working device is a cooler component, and the cooler component is used to cool the hydraulic oil of the hydraulic system; or The operating device is a turntable component, and the turntable component is used to drive the rotating mechanism of the drainage vehicle to rotate.

9. The drainage vehicle according to claim 7, characterized in that: The operating device is a water pump, and the water pump is used for drainage operations; The drainage vehicle also includes a frame, a lifting mechanism, an arm, a multi-stage telescopic drainage pipe and a driving mechanism; The arm is hinged to the frame; One end of the lifting mechanism is connected to the vehicle frame, and the other end of the lifting mechanism is connected to the boom, and the lifting mechanism is used to flip the boom; The multi-stage telescopic drainage pipe is arranged on the arm frame, the multi-stage telescopic drainage pipes are nested and slidably connected with each other, and the driving mechanism is used to drive the multi-stage telescopic drainage pipe to extend and retract; The water pump is connected to the water inlet of the multi-stage telescopic drainage pipe.

10. The drainage vehicle according to claim 9, characterized in that: The drainage vehicle also includes a translation mechanism and a rotation mechanism; The translation mechanism is arranged on the frame, the slewing mechanism is arranged on the translation mechanism, the arm is hinged to the slewing mechanism, and one end of the lifting mechanism is connected to the slewing mechanism; The translation mechanism is used to translate the slewing mechanism and the arm to move away from the frame or closer to the frame; The slewing mechanism is used for slewing the arm bracket left and right.

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