Accessory hydraulic system and operation machine

Abstract

The utility model relates to the technical field of hydraulic equipment, and discloses an accessory hydraulic system and an operation machine. The accessory hydraulic system comprises a reversing assembly, an oil inlet pipeline, an oil return pipeline and a flushing assembly. The reversing assembly is used for being communicated with an oil way of an oil cylinder. An oil inlet of the reversing assembly is used for being communicated with a main machine hydraulic system oil way through an oil inlet pipeline. An oil return opening of the reversing assembly is used for being communicated with a main machine hydraulic system oil way through an oil return pipeline. A flushing oil inlet of the flushing assembly is communicated with the oil inlet pipeline, and a flushing oil outlet of the flushing assembly is communicated with the oil return pipeline; the flushing assembly has a first state and a second state. In the first state, hydraulic oil flows into the reversing assembly; in the second state, the hydraulic oil flows into the flushing assembly to achieve circular flowing. The accessory hydraulic system solves the problem that in the prior art, an executing element of an accessory hydraulic system is low in response speed under the low-temperature working condition.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic equipment, in particular to an accessory hydraulic system and an operating machine. Background Art

[0002] In the related art, the hydraulic system of the attachment of the operating machinery is far away from the oil pump of the main hydraulic system, and the oil inlet and return pipelines are long. Taking the container front-lift crane as an example, the length of the pipeline from the attachment hydraulic system to the main oil pump exceeds 30m. Under low-temperature conditions, the oil temperature is low and the viscosity is high, resulting in large pipeline losses and high back pressure. When the oil supply pressure remains unchanged, the high back pressure causes the actuators of the attachment hydraulic system to move slowly and respond slowly. The current common solution is to add heating elements such as resistance wires to heat the hydraulic oil, but this method usually has the defects of high energy consumption, heat dissipation, and poor effect. Therefore, how to improve the response speed of the actuators in the hydraulic system of the attachment under low-temperature conditions is an urgent problem that the industry needs to solve. Utility Model Content

[0003] The utility model provides an attachment hydraulic system and an operating machine, which are used to solve the defect that the actuator of the attachment hydraulic system in the prior art has a slow response speed under low temperature conditions.

[0004] The utility model provides a hydraulic system for accessories, which comprises the following steps.

[0005] A reversing assembly, used for communicating with the oil circuit of the oil cylinder;

[0006] An oil inlet pipeline, through which the oil inlet of the reversing assembly is connected to the oil circuit of the main engine hydraulic system;

[0007] An oil return pipeline, through which the oil return port of the reversing assembly is connected to the oil circuit of the main engine hydraulic system;

[0008] A flushing assembly, wherein the flushing oil inlet of the flushing assembly is connected to the oil inlet pipeline, and the flushing oil outlet of the flushing assembly is connected to the oil return pipeline; the flushing assembly has a first state and a second state;

[0009] In the first state, the hydraulic oil circulates between the main engine hydraulic system, the reversing assembly and the oil cylinder; in the second state, the hydraulic oil circulates between the main engine hydraulic system and the flushing assembly.

[0010] The hydraulic system of the attachment provided by the utility model also includes:

[0011] An energy storage component is arranged in the oil inlet pipeline between the flushing oil inlet and the oil inlet of the reversing component; in the first state, the energy storage component is used to provide the hydraulic oil to the reversing component; in the second state, the energy storage component is used to store the hydraulic oil.

[0012] According to the attachment hydraulic system provided by the utility model, the energy storage component includes:

[0013] An accumulator is arranged in the oil inlet pipeline between the flushing oil inlet and the oil inlet of the reversing assembly; in the first state, the accumulator assembly is used to provide the hydraulic oil to the reversing assembly; in the second state, the accumulator assembly is used to store the hydraulic oil;

[0014] A one-way valve is arranged in the oil inlet pipeline between the accumulator and the flushing oil inlet; the one-way valve is used to prevent pressure leakage of the accumulator.

[0015] The hydraulic system of the attachment provided by the utility model also includes:

[0016] A throttling assembly, wherein the flushing oil inlet is connected to the oil inlet pipeline through the throttling assembly, and the throttling assembly is used to reduce the flow of the hydraulic oil entering the flushing assembly.

[0017] According to the attachment hydraulic system provided by the utility model, the throttling component has a throttling hole, and the diameter of the throttling hole is smaller than the diameter of the oil inlet pipeline.

[0018] According to the attachment hydraulic system provided by the utility model, the flushing assembly includes:

[0019] A flushing valve group, wherein the flushing oil inlet of the flushing valve group is connected to the oil inlet pipeline through an oil inlet branch pipeline, and the flushing oil outlet of the flushing valve group is connected to the oil return pipeline through an oil return branch pipeline.

[0020] According to the attachment hydraulic system provided by the utility model, the diameter of the oil inlet branch pipeline is smaller than the diameter of the oil inlet pipeline.

[0021] According to the attachment hydraulic system provided by the utility model, the flushing valve group includes a two-position two-way valve.

[0022] The utility model also discloses an operating machine, comprising a machine body and any one of the above-mentioned attachment hydraulic systems; the attachment hydraulic system is arranged on the machine body.

[0023] According to the operating machinery provided by the utility model, the operating machinery includes a crane, a hoist or an aerial work vehicle.

[0024] The attachment hydraulic system and operating machinery provided by the utility model are provided with a flushing component with a first state and a second state. The flushing oil inlet of the flushing component is connected to the oil inlet pipeline, and the flushing oil outlet of the flushing component is connected to the oil return pipeline. In other words, by providing the flushing component in parallel with the reversing component, the operating state of the flushing component can be adjusted according to the operating state of the oil cylinder to ensure that when the oil cylinder is not in motion, the flushing component is in the second state, so that the hydraulic oil in the pipeline circulates, thereby reducing the viscosity of the hydraulic oil, and solving the problem of slow response speed of the actuator of the attachment hydraulic system in the prior art under low temperature conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0026] Figure 1 The utility model is a schematic diagram of the structure of the hydraulic system of the attachment in the prior art.

[0027] Figure 2 The utility model is a schematic diagram of the structure of the hydraulic system of the attachment.

[0028] Reference numerals:

[0029] 10. Main engine hydraulic system; 20. Oil cylinder;

[0030] 100, reversing assembly; 110, reversing valve; 120, hydraulic lock;

[0031] 200, oil inlet pipeline;

[0032] 300, oil return pipeline;

[0033] 400, flushing assembly; 410, flushing valve group; 420, oil inlet branch pipeline; 430, oil return branch pipeline;

[0034] 500, energy storage assembly; 510, accumulator; 520, one-way valve;

[0035] 600. Throttling component. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described clearly and completely in conjunction with the drawings in the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0037] In the description of the embodiments of the present utility model, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present utility model. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0038] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0039] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0040] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model embodiment. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0041] like Figure 1 As shown, the attachment hydraulic system in the related art includes a hydraulic lock 120 and a reversing valve 110; the oil inlet P of the reversing valve 110 is connected to the oil circuit of the main hydraulic system 10 through the first oil inlet pipeline, the oil return port T of the reversing valve 110 is connected to the oil circuit of the main hydraulic system 10 through the first oil return pipeline, the first working port of the reversing valve 110 is connected to the oil inlet of the hydraulic lock 120, and the second working port of the reversing valve 110 is connected to the oil return port of the hydraulic lock 120; the first working port A of the hydraulic lock 120 is connected to the rodless chamber of the oil cylinder 20 through the second oil inlet pipeline, and the second working port B of the hydraulic lock 120 is connected to the rod chamber of the oil cylinder 20 through the second oil return pipeline. As one of the actuators of the attachment hydraulic system, the oil cylinder 20 is far away from the oil tank of the main hydraulic system 10, resulting in a slow response speed of the actuator under low temperature conditions.

[0042] In order to improve the response speed of the actuator under low temperature conditions, the utility model provides a hydraulic system for accessories. Figure 2 The hydraulic system of the utility model is described in detail. Figure 2 The utility model is a schematic diagram of the structure of the hydraulic system of the attachment.

[0043] like Figure 2 As shown, a specific embodiment of the utility model provides an attachment hydraulic system, which includes a reversing assembly 100 , an oil inlet pipeline 200 , an oil return pipeline 300 and a flushing assembly 400 .

[0044] The reversing assembly 100 is used to communicate with the oil circuit of the oil cylinder 20. The oil inlet of the reversing assembly 100 is used to communicate with the oil circuit of the main hydraulic system 10 through the oil inlet pipeline 200. The oil return port of the reversing assembly 100 is used to communicate with the oil circuit of the main hydraulic system 10 through the oil return pipeline 300; the flushing oil inlet of the flushing assembly 400 is connected to the oil inlet pipeline 200, and the flushing oil outlet of the flushing assembly 400 is connected to the oil return pipeline 300; the flushing assembly 400 has a first state and a second state.

[0045] In the first state, the hydraulic oil circulates between the main hydraulic system, the reversing assembly and the oil cylinder; in the second state, the hydraulic oil circulates between the main hydraulic system and the flushing assembly.

[0046] In this embodiment, by providing a flushing component 400 having a first state and a second state, the flushing oil inlet of the flushing component 400 is connected to the oil inlet pipeline 200, and the flushing oil outlet of the flushing component 400 is connected to the oil return pipeline 300. In other words, by providing the flushing component 400 in parallel with the reversing component 100, the operating state of the flushing component 400 can be adjusted according to the operating state of the cylinder 20 to ensure that when the cylinder 20 is not in motion, the flushing component 400 is in the second state, so that the hydraulic oil in the pipeline circulates, thereby reducing the viscosity of the hydraulic oil, thereby solving the problem of slow response speed of the actuator of the hydraulic system of the accessories under low temperature conditions in the prior art.

[0047] Specifically, when the oil cylinder 20 is not in motion, the flushing assembly 400 is adjusted to the second state, and the hydraulic oil flows back to the main hydraulic system 10 through the flushing assembly 400, so as to realize the circulation of the hydraulic oil, reduce the viscosity of the hydraulic oil, and improve the response speed of the oil cylinder 20. When the oil cylinder 20 is in motion, the flushing assembly 400 is adjusted to the first state, and the hydraulic oil enters the rodless cavity or the rod cavity of the oil cylinder 20 through the reversing assembly 100.

[0048] In some embodiments, the pipeline between the reversing assembly 100 and the oil cylinder 20 is relatively short. Preferably, the reversing assembly 100 is directly connected to the oil cylinder 20. In other words, shortening the pipeline between the reversing assembly 100 and the oil cylinder 20 as much as possible can further improve the response speed of the oil cylinder 20 and reduce pipeline loss and back pressure.

[0049] It can be understood that the length of the pipeline between the reversing assembly 100 and the oil cylinder 20 of this embodiment is significantly smaller than the length of the pipeline between the oil cylinder 20 and the reversing assembly 100 in the related art.

[0050] Furthermore, the reversing assembly 100 includes a reversing valve 110 and a hydraulic lock 120. Preferably, the reversing valve 110 is a three-position four-way reversing valve. The oil inlet of the reversing valve 110 is connected to the oil circuit of the main hydraulic system 10 through the oil inlet pipeline 200, and the oil return port of the reversing valve 110 is connected to the oil circuit of the main hydraulic system 10 through the oil return pipeline 300; the first working port of the reversing valve 110 is connected to the oil inlet of the hydraulic lock 120, and the second working port of the reversing valve 110 is connected to the oil return port of the hydraulic lock 120; the first working port A of the hydraulic lock 120 is connected to the rodless chamber of the oil cylinder 20, and the second working port B of the hydraulic lock 120 is connected to the rod chamber of the oil cylinder 20.

[0051] In some embodiments, the attachment hydraulic system further includes an energy storage component 500; the energy storage component 500 is disposed in the oil inlet pipeline 200 between the flushing oil inlet and the oil inlet of the reversing component 100; in a first state, the energy storage component 500 is used to provide hydraulic oil to the reversing component 100; in a second state, the energy storage component 500 is used to store hydraulic oil. By providing the energy storage component 500, the response speed of the oil cylinder under low temperature conditions can be further improved.

[0052] Further, the energy storage assembly 500 includes an accumulator 510 and a one-way valve 520; the accumulator 510 is arranged in the oil inlet pipeline 200 between the flushing oil inlet and the oil inlet of the reversing assembly 100; in the first state, the energy storage assembly 500 is used to provide hydraulic oil to the reversing assembly 100; in the second state, the energy storage assembly 500 is used to store hydraulic oil; the one-way valve 520 is arranged in the oil inlet pipeline 200 between the accumulator 510 and the flushing oil inlet; the one-way valve 520 is used to prevent the pressure of the accumulator 510 from leaking. By setting the accumulator 510, hydraulic oil can be stored or discharged according to actual needs. By setting the one-way valve 520, the pressure of the accumulator 510 can be prevented from leaking, ensuring that the accumulator 510 can quickly provide hydraulic oil to the reversing valve 110.

[0053] In some embodiments, the attachment hydraulic system further includes a throttling assembly 600; the flushing oil inlet is connected to the oil inlet pipeline 200 through the throttling assembly 600, and the throttling assembly 600 is used to reduce the flow of hydraulic oil entering the flushing assembly 400. By reducing the flow of hydraulic oil flowing into the flushing assembly 400, the fluidity of the hydraulic oil is improved, the system back pressure is reduced, and the response speed of the actuator under low temperature conditions is improved.

[0054] Furthermore, the throttle assembly 600 has a throttle hole, and the diameter of the throttle hole is smaller than the diameter of the oil inlet pipeline 200. By setting the throttle hole, damping reflux is achieved, so that the oil in the standby condition always returns through the damping oil, continuously flushing the entire system circuit, improving the fluidity of the hydraulic oil and reducing the system back pressure.

[0055] In some embodiments, the flushing assembly 400 includes a flushing valve group 410; the flushing oil inlet of the flushing valve group 410 is connected to the oil inlet pipeline 200 through the oil inlet branch pipeline 420, and the flushing oil outlet of the flushing valve group 410 is connected to the oil return pipeline 300 through the oil return branch pipeline 430. By providing the flushing valve group 410, the flow direction of the hydraulic oil can be controlled, which simplifies the system structure.

[0056] Furthermore, the flushing valve group 410 includes a two-position two-way valve. The oil inlet of the two-position two-way valve is connected to the oil inlet pipeline 200 through the oil inlet branch pipeline 420, and the oil outlet of the two-position two-way valve is connected to the oil return pipeline 300 through the oil return branch pipeline 430. Specifically, the two-position two-way valve is a solenoid valve DT3. When the solenoid valve DT3 is energized, the hydraulic oil no longer circulates through the solenoid valve DT3. When the solenoid valve DT3 loses power, the hydraulic oil circulates through the solenoid valve DT3.

[0057] Furthermore, the diameter of the oil inlet branch pipeline 420 is smaller than the diameter of the oil inlet pipeline 200, which can further improve the speed of the actuator under low temperature conditions.

[0058] Combine the following Figure 2 The provided attachment hydraulic system describes the working process of the attachment hydraulic system of this embodiment in detail.

[0059] When the cylinder 20 is not in motion, the solenoid valve DT3 loses power, the P port of the accessory oil inlet pipeline 200 returns oil through the oil inlet branch pipeline 420, the solenoid valve DT3 and the oil return branch pipeline 430, and returns to the main hydraulic system 10, realizing forced reflux, so that the hydraulic oil continuously flushes the system pipeline, and the viscosity of the hydraulic oil is significantly reduced; at the same time, the P port of the accessory oil inlet pipeline 200 is pressurized to the accumulator 510 through the one-way valve 520, and the accumulator 510 maintains a certain pressure for a long time.

[0060] When the oil cylinder 20 needs to be extended, the main engine hydraulic system 10 provides the working pressure required by the attachment (significantly higher than the standby pressure), and the pressure is supplied to the valve group through the pipeline from the main engine hydraulic system 10 to the valve group of the attachment. Specifically, the hydraulic oil is supplied to the reversing valve 110 and the hydraulic lock 120 through the oil inlet pipeline 200; the solenoid valve DT3 is energized, and the hydraulic oil will not circulate through the solenoid valve DT3. At this time, the PT port is no longer connected through the solenoid valve DT3, and the P port pressure is equal to the oil supply pressure of the main engine hydraulic system 10; At this time, DT2 of the reversing valve 110 is energized and switched to the right position, and the pressure oil at port P passes through the right position of the reversing valve 110, the hydraulic lock 120, and the pipeline A-1 to the rodless chamber of the cylinder 20; at the same time, the accumulator 510 quickly releases the pressure oil and merges with the system oil inlet P pressure oil to supply oil to the rodless chamber of the cylinder 20, and the cylinder 20 extends quickly; at the same time, the rod chamber of the cylinder 20 needs to return oil, and the hydraulic oil in the rod chamber of the cylinder 20 is passed through the pipeline 2-B, the hydraulic lock 120, the right position of the reversing valve 110, and the T-port pipeline to the main hydraulic system 10. Preferably, since the three parts of the reversing valve 110, the hydraulic lock 120 and the accumulator 510 are completely installed together with the cylinder 20 without any pipeline connection in the middle, the pipeline is very short (compared with the pipeline from the main hydraulic system 10 to the valve group, the pipeline length can be ignored), so the pipeline pressure loss is small; at the same time, when the cylinder 20 is not in motion, the pipeline from PT to the main hydraulic system 10 is forced to circulate for a long time, the fluidity of the hydraulic oil is good, the pipeline pressure loss is small, and the return oil back pressure is small; during the extension of the cylinder 20, the entire return oil system pipeline pressure loss is small and the back pressure is small, so the extension speed of the cylinder 20 is significantly improved, solving the problem of slow movement due to long pipelines and high return oil back pressure under low temperature conditions.

[0061] When the oil cylinder 20 needs to be retracted, the main engine hydraulic system 10 provides the working pressure required by the attachment (significantly higher than the standby pressure), and the pressure is supplied to the valve group through the pipeline P port of the main engine hydraulic system 10 to the attachment valve group. Specifically, the hydraulic oil is supplied to the reversing valve 110 and the hydraulic lock 120 through the oil inlet pipeline 200; the solenoid valve DT3 is energized, and the hydraulic oil will not circulate through the solenoid valve DT3. At this time, the PT port is no longer connected, and the P port pressure is equal to the oil supply pressure of the main engine hydraulic system 10; at the same time, the reversing valve 11 0's DT1 is energized, the reversing valve 110 is switched to the left position, and the pressure oil at port P passes through the reversing valve 110 left position, the hydraulic lock 120, and the pipeline B-2 to the rod chamber of the cylinder 20; at the same time, the accumulator 510 quickly releases the pressure oil and merges with the system oil inlet P pressure oil to supply oil to the rodless chamber of the cylinder 20, and the cylinder 20 retracts quickly; at the same time, the rodless chamber of the cylinder 20 needs to return oil, and the oil in the rodless chamber of the cylinder 20 passes through the pipeline 1-A, the hydraulic lock 120, the reversing valve 110 left position, and the T-port pipeline to the main hydraulic system 10. Preferably, since the three parts of the reversing valve 110, the hydraulic lock 120 and the accumulator 510 are completely installed together with the oil cylinder 20 without any pipeline connection in the middle, the pipeline is very short (compared with the pipeline from the main engine to the valve group, the pipeline length can be ignored), so the pipeline pressure loss is small; at the same time, when the oil cylinder 20 is not in motion, the PT to the main engine pipeline is forced to circulate for a long time, the oil fluidity is good, the pipeline pressure loss is small, and the return oil back pressure is small; during the extension process of the oil cylinder 20, the entire return oil system pipeline pressure loss is small, the back pressure is small, so the extension speed of the oil cylinder 20 is significantly improved, solving the problem of slow movement due to long pipelines and high return oil back pressure under low temperature conditions.

[0062] A specific embodiment of the second aspect of the utility model provides a working machine, which includes a machine body and an attachment hydraulic system according to any one of the above embodiments; the attachment hydraulic system is arranged on the machine body.

[0063] The operating system of this embodiment includes the above-mentioned attachment hydraulic system, and therefore has at least the above-mentioned advantages, which will not be described in detail here.

[0064] It is understandable that the working machine includes a cylinder 20 or a similar execution structure which is far away from the main hydraulic system and has a long pipeline.

[0065] In some embodiments, the working machine may be an engineering machine such as a crane, an excavator, a pile driver, or an engineering vehicle such as a aerial platform truck, a fire truck, a mixer truck, or the like.

[0066] Furthermore, the operating machinery includes a crane, a hoist or an aerial work vehicle.

[0067] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A hydraulic system for an attachment, characterized in that: include: A reversing assembly (100) is connected to the oil circuit of the oil cylinder (20); An oil inlet pipeline (200), wherein the oil inlet of the reversing assembly (100) is connected to the oil circuit of the main engine hydraulic system (10) through the oil inlet pipeline (200); An oil return pipeline (300), wherein the oil return port of the reversing assembly (100) is connected to the oil circuit of the main engine hydraulic system (10) through the oil return pipeline (300); A flushing assembly (400), wherein the flushing oil inlet of the flushing assembly (400) is in communication with the oil inlet pipeline (200), and the flushing oil outlet of the flushing assembly (400) is in communication with the oil return pipeline (300); the flushing assembly (400) has a first state and a second state; In the first state, the hydraulic oil circulates between the main engine hydraulic system (10), the reversing assembly (100) and the oil cylinder (20); in the second state, the hydraulic oil circulates between the main engine hydraulic system (10) and the flushing assembly (400).

2. The attachment hydraulic system according to claim 1, characterized in that: Also includes: An energy storage component (500) is arranged in the oil inlet pipeline (200) between the flushing oil inlet and the oil inlet of the reversing component (100); in the first state, the energy storage component (500) is used to provide the hydraulic oil to the reversing component (100); in the second state, the energy storage component (500) is used to store the hydraulic oil.

3. The attachment hydraulic system according to claim 2, characterized in that: The energy storage component (500) comprises: an accumulator (510) arranged in the oil inlet pipeline (200) between the flushing oil inlet and the oil inlet of the reversing assembly (100); in the first state, the accumulator assembly (500) is used to provide the hydraulic oil to the reversing assembly (100); in the second state, the accumulator assembly (500) is used to store the hydraulic oil; A one-way valve (520) is arranged in the oil inlet pipeline (200) between the accumulator (510) and the flushing oil inlet; the one-way valve (520) is used to prevent pressure leakage of the accumulator (510).

4. The attachment hydraulic system according to claim 1, characterized in that: Also includes: A throttling assembly (600), wherein the flushing oil inlet is connected to the oil inlet pipeline (200) through the throttling assembly (600), and the throttling assembly (600) is used to reduce the flow rate of the hydraulic oil entering the flushing assembly (400).

5. The attachment hydraulic system according to claim 4, characterized in that: The throttling assembly (600) has a throttling hole, and the diameter of the throttling hole is smaller than the diameter of the oil inlet pipeline (200).

6. The attachment hydraulic system according to any one of claims 1 to 5, characterized in that: The flushing assembly (400) comprises: A flushing valve group (410), wherein the flushing oil inlet of the flushing valve group (410) is connected to the oil inlet pipeline (200) via an oil inlet branch pipeline (420), and the flushing oil outlet of the flushing valve group (410) is connected to the oil return pipeline (300) via an oil return branch pipeline (430).

7. The attachment hydraulic system according to claim 6, characterized in that: The diameter of the oil inlet branch pipeline (420) is smaller than the diameter of the oil inlet pipeline (200).

8. The attachment hydraulic system according to claim 6, characterized in that: The flushing valve assembly (410) comprises a two-position two-way valve.

9. A working machine, characterized in that: It comprises a machine body, and the attachment hydraulic system according to any one of claims 1 to 8; the attachment hydraulic system is arranged on the machine body.

10. The working machine according to claim 9, characterized in that: The operating machinery includes a crane, a hoist or an aerial work vehicle.

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