Control valve group

Abstract

The invention provides a control valve group. The control valve group comprises a valve block; the circulation pipeline is arranged in the valve block in a penetrating mode, the circulation pipeline is provided with an oil inlet, a first oil outlet and a second oil outlet which are sequentially arranged, the oil inlet is formed in the outer side wall of the valve block, the first oil outlet is communicated with the brake pedal valve, and the second oil outlet is communicated with the parking hand brake valve; the filter is arranged on the valve block and communicated with the circulation pipeline; the brake valve group is arranged on the valve block and communicates with the circulation pipeline, one end of the brake valve group communicates with the oil inlet, and the other end of the brake valve group communicates with the first oil outlet; and the parking valve group is arranged on the valve block and communicates with the circulation pipeline, one end of the parking valve group communicates with the oil inlet, the other end of the parking valve group communicates with the second oil outlet, and the parking valve group is used for controlling the flow of the second oil outlet. By means of the technical scheme, the problems that in the prior art, a hydraulic system is large in occupied space and poor in integration degree can be solved.

Description

Technical Field

[0001] The present invention relates to the field of hydraulic control technology, and in particular to a control valve group. Background Art

[0002] During coal mining, it is necessary to use inspection vehicles regularly to check the construction conditions and environmental safety. In the hydraulic brake system of the inspection vehicle, it is necessary to control the driving brake pressure and the parking brake pressure. The control valve group is the core component of the automobile braking system. Its main function is to control the flow direction of the oil, adjust the oil flow, and control the oil pressure, so that the car can achieve braking, power operation, parking and other functions.

[0003] In general hydraulic brake systems, hydraulic control valves with various functions, such as charging valves, parking brake valve groups, return oil manifold blocks and other auxiliary components are usually installed together, and various components are connected through hydraulic pipelines and brackets to achieve the above hydraulic brake functions. This makes the hydraulic system occupy a large space, and the pipelines are exposed to the outside, which is prone to leakage failures. Summary of the invention

[0004] The present invention provides a control valve group to solve the problems of large occupied space and poor integration of the hydraulic system in the prior art.

[0005] The present invention provides a control valve group, which includes: a valve block; a circulation pipeline, which is penetrated in the valve block, and the circulation pipeline has an oil inlet, a first oil outlet and a second oil outlet which are arranged in sequence, the oil inlet is arranged on the outer side wall of the valve block, the oil inlet is connected to the oil tank, the first oil outlet is connected to the brake pedal valve, and the second oil outlet is connected to the parking handbrake valve; a filter, which is arranged on the valve block, the filter is connected to the circulation pipeline, and the filter is used to filter impurities in the oil in the circulation pipeline; a brake valve group, which is arranged on the valve block and connected to the circulation pipeline, one end of the brake valve group is connected to the oil inlet, and the other end of the brake valve group is connected to the first oil outlet, and the brake valve group is used to control the flow of the first oil outlet; a parking valve group, which is arranged on the valve block and connected to the circulation pipeline, one end of the parking valve group is connected to the oil inlet, and the other end of the parking valve group is connected to the second oil outlet, and the parking valve group is used to control the flow of the second oil outlet.

[0006] Furthermore, the brake valve group includes a flow control component and a shuttle valve connected in sequence. The shuttle valve is arranged on the valve block, the flow control component is located upstream of the shuttle valve, the flow control component is connected to the oil inlet, and the flow control component can adjust the flow of oil in the circulation pipeline according to the pressure of the first oil outlet.

[0007] Furthermore, the shuttle valve has a first oil port, a second oil port and a third oil port which are relatively arranged, the first oil port is connected to the oil inlet, the second oil port and the third oil port are both connected to the brake pedal valve, and the second oil port and the third oil port form a first oil outlet; the shuttle valve has a first state and a second state, when the shuttle valve is in the first state, the first oil port is connected to the second oil port; when the shuttle valve is in the second state, the first oil port is connected to the third oil port.

[0008] Furthermore, the flow control component includes: a flow valve, which is arranged on the valve block and connected to the circulation pipeline, the flow valve has a fourth oil port, a fifth oil port and a sixth oil port, the fourth oil port is connected to the oil inlet, the fifth oil port is connected to the first oil outlet, and the sixth oil port is connected to the outside; the flow valve has a relatively set circulation state and a pressure relief state, when the flow valve is in the circulation state, the fourth oil port is connected to the fifth oil port, and the oil in the circulation pipeline can flow from the flow valve to the shuttle valve; when the flow valve is in the pressure relief state, the fourth oil port is connected to the sixth oil port, and the circulation pipeline The oil in the control valve group flows out of the flow valve; the pressure relief valve is arranged on the valve block and is connected with the circulation pipeline. The pressure relief valve has a seventh oil port, an eighth oil port and a ninth oil port. The seventh oil port is connected with the oil inlet, the eighth oil port is connected with the first oil port, and the ninth oil port is connected with the outside. The pressure relief valve also has a tenth oil port. The tenth oil port is connected with the flow valve through the first pressure pipeline. A second pressure pipeline is also arranged between the circulation pipeline and the flow valve. The first pressure pipeline and the second pressure pipeline cooperate with each other to drive the flow valve to switch between the circulation state and the pressure relief state.

[0009] Furthermore, the shuttle valve is connected in parallel with the parking valve group and both are located downstream of the flow valve. The parking valve group includes an electromagnetic reversing valve and a first pressure sensor, which are sequentially arranged on the circulation pipeline. The electromagnetic reversing valve is arranged on the valve block. The electromagnetic reversing valve has a first inlet, a first outlet and a second outlet. The first inlet is connected to the oil inlet, the first outlet is connected to the second oil outlet, and the second outlet is connected to the outside. The electromagnetic reversing valve has a relatively set pressurized state and a decompressed state. When the electromagnetic reversing valve is in the pressurized state, the first inlet is connected to the first outlet, and when the electromagnetic reversing valve is in the decompressed state, the first inlet is connected to the second outlet; the first pressure sensor is arranged on the valve block and is located between the electromagnetic reversing valve and the second oil outlet. The first pressure sensor is used to detect the pressure of the second oil outlet, and the electromagnetic reversing valve switches between the pressurized state and the decompressed state according to the pressure of the second oil outlet.

[0010] Furthermore, the parking valve group also includes a pressure reducing valve, which is arranged on the valve block and located between the flow valve and the electromagnetic reversing valve. The pressure reducing valve is used to control the flow of oil in the circulation pipeline located at the front end of the electromagnetic reversing valve.

[0011] Furthermore, the control valve group also includes an overflow valve and a second pressure sensor, which are both arranged on the valve block, one end of the overflow valve is connected to the oil inlet, and the other end of the overflow valve is connected to the outside, the overflow valve is connected to the circulation pipeline, and the second pressure sensor is connected to the oil inlet. The second pressure sensor can detect the pressure at the oil inlet, and the overflow valve can adjust the flow rate of oil at the oil inlet.

[0012] Furthermore, the brake valve group also includes a third pressure sensor, which is arranged on the valve block, on the flow pipeline, and between the flow valve and the parking valve group. The third pressure sensor is used to detect the pressure value at the first oil port.

[0013] Furthermore, the brake valve group also includes a first one-way valve, which is arranged on the valve block, is communicated with the flow pipeline, and is located between the flow valve and the shuttle valve.

[0014] Furthermore, the parking valve group also includes a second one-way valve, which is arranged on the valve block, connected to the flow pipeline, and located between the pressure reducing valve and the electromagnetic reversing valve.

[0015] By applying the technical solution of the present invention, the flow pipeline, filter, brake valve group and parking valve group are integrated on the valve block, the integration of the control valve group is increased, the space occupied by the hydraulic system in the whole vehicle becomes smaller, and the technical design of the whole vehicle can be more concise and efficient. The filter also improves the cleanliness of the oil and extends the service life of the brake system. The processed flow pipeline inside the valve block replaces the traditional external pipeline connection, which not only saves costs, but also eliminates pipeline leakage caused by improper installation, use and maintenance, reduces the risk of oil leakage, reduces the possibility of external pollutants entering the hydraulic system, and improves the stability of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0017] Figure 1 The structure diagram of the control valve group provided by the present invention is shown;

[0018] Figure 2 The hydraulic principle diagram of the control valve group provided by the present invention is shown.

[0019] The above drawings include the following reference numerals:

[0020] 10. Circulation pipeline;

[0021] 11. Oil inlet;

[0022] 12. The first oil outlet;

[0023] 13. Second oil outlet;

[0024] 14. The first oil drain port;

[0025] 15. Second oil drain port;

[0026] 20. Filter;

[0027] 30. Shuttle valve;

[0028] 40. Flow valve;

[0029] 50. Pressure relief valve;

[0030] 60. Solenoid reversing valve;

[0031] 70. A first pressure sensor;

[0032] 71. A second pressure sensor;

[0033] 73. A third pressure sensor;

[0034] 80. Pressure reducing valve;

[0035] 90. Overflow valve;

[0036] 91. Second one-way valve;

[0037] 92. First one-way valve;

[0038] 100. Valve block. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] like Figure 1 and Figure 2As shown, an embodiment of the present invention provides a control valve group, which includes: a valve block 100, a circulation pipeline 10, a filter 20, a brake valve group and a parking valve group. The circulation pipeline 10 is arranged in the valve block 100, and the circulation pipeline 10 has an oil inlet 11, a first oil outlet 12 and a second oil outlet 13 arranged in sequence. The oil inlet 11 is arranged on the outer wall of the valve block 100, the oil inlet 11 is connected to the oil tank, the first oil outlet 12 is connected to the brake pedal valve, and the second oil outlet 13 is connected to the parking hand brake valve. The filter 20 is arranged on the valve block 100, the filter 20 is connected to the circulation pipeline 10, and the filter 20 is used to filter impurities in the oil in the circulation pipeline 10. The brake valve group is arranged on the valve block 100 and is connected to the circulation pipeline 10. One end of the brake valve group is connected to the oil inlet 11, and the other end of the brake valve group is connected to the first oil outlet 12. The brake valve group is used to control the flow of the first oil outlet 12. The parking valve group is arranged on the valve block 100 and communicated with the flow pipeline 10 . One end of the parking valve group is communicated with the oil inlet 11 , and the other end of the parking valve group is communicated with the second oil outlet 13 . The parking valve group is used to control the flow of the second oil outlet 13 .

[0041] By applying the technical solution of the present invention, the circulation pipeline 10, the filter 20, the brake valve group and the parking valve group are integrated on the valve block 100, thereby increasing the integration of the control valve group, making the space occupied by the hydraulic system in the whole vehicle smaller, and the technical design of the whole vehicle can be more concise and efficient. The filter 20 also improves the cleanliness of the oil and extends the service life of the brake system. The processed circulation pipeline 10 inside the valve block 100 replaces the traditional external pipeline connection, which not only saves costs, but also eliminates pipeline leakage caused by improper installation, use and maintenance, reduces the risk of oil leakage, reduces the possibility of external pollutants entering the hydraulic system, and improves the stability of the system.

[0042] Specifically, the oil inlet 11, the first oil outlet 12 and the second oil outlet 13 are all provided on the valve block 100, and each of the ports is marked with an identification mark for easy connection. The valve bodies of the shuttle valve 30 and the flow valve 40 are all plugged into the valve block 100 through connectors, which further improves the convenience of disassembly, assembly and maintenance of each component.

[0043] The brake valve group includes a flow control component and a shuttle valve 30 connected in sequence, the shuttle valve 30 is arranged on the valve block 100, the flow control component is located upstream of the shuttle valve 30, the flow control component is connected to the oil inlet 11, and the flow control component can adjust the flow of the oil in the circulation pipeline 10 according to the pressure of the first oil outlet 12. The above arrangement can ensure that the supply of oil is adjusted in real time under different braking requirements, improve the braking response speed and braking effect, and at the same time improve the braking performance and safety of driving.

[0044] Furthermore, the shuttle valve 30 has a first oil port, a second oil port and a third oil port which are arranged relatively, the first oil port is connected to the oil inlet 11, and the second oil port and the third oil port are both connected to the brake pedal valve. Specifically, the second oil port and the third oil port are connected to the brake pedal valve through the accumulator respectively, and the second oil port and the third oil port form the first oil outlet 12; the shuttle valve 30 has a first state and a second state, when the shuttle valve 30 is in the first state, the first oil port is connected to the second oil port; when the shuttle valve 30 is in the second state, the first oil port is connected to the third oil port. The design of the shuttle valve 30 can flexibly switch the oil flow direction, so that the shuttle valve 30 can balance the pressure of the two accumulators to ensure the normal use of the brake pedal valve, thereby improving the safety of the control valve group.

[0045] Specifically, the flow control component includes: a flow valve 40, which is arranged on the valve block 100 and is connected to the circulation pipeline 10, the flow valve 40 has a fourth oil port, a fifth oil port and a sixth oil port, the fourth oil port is connected to the oil inlet 11, the fifth oil port is connected to the first oil outlet 12, and the sixth oil port is connected to the outside through the first oil drain port 14; the flow valve 40 has a relatively set flow state and a pressure relief state, when the flow valve 40 is in the flow state, the fourth oil port is connected to the fifth oil port, and the oil in the circulation pipeline 10 can flow from the flow valve 40 to the shuttle valve 30; when the flow valve 40 is in the pressure relief state, the fourth oil port is connected to the sixth oil port, and the circulation pipeline The oil in 10 flows out of the control valve group from the flow valve 40; the pressure relief valve 50 is arranged on the valve block 100 and is connected to the circulation pipeline 10. The pressure relief valve 50 has a seventh oil port, an eighth oil port and a ninth oil port. The seventh oil port is connected to the oil inlet 11, the eighth oil port is connected to the first oil port, and the ninth oil port is connected to the outside through the second oil relief port 15. The pressure relief valve 50 also has a tenth oil port, which is connected to the flow valve 40 through the first pressure pipeline. A second pressure pipeline is also arranged between the circulation pipeline 10 and the flow valve 40. The first pressure pipeline and the second pressure pipeline cooperate with each other to drive the flow valve 40 to switch between the circulation state and the pressure relief state. The flow valve can ensure the stability of the oil supply, while the pressure relief valve releases excess pressure when the pressure is overloaded. Through the cooperation of the above-mentioned pressure relief valve, the flow valve and the shuttle valve, the pressure overload in the brake system can be effectively avoided, and the system can be avoided from being damaged, which provides reliable braking guarantee for the vehicle under complex working conditions, thereby extending the service life of the vehicle and reducing maintenance costs.

[0046] And through the shuttle valve 30, the pressure relief valve 50 and the flow valve 40, the combination of the three can realize the function of the filling valve in the prior art. At the same time, the present application integrates the three valves and can be disassembled and assembled separately without causing damage to the circulation pipeline 10, which is convenient for subsequent maintenance and debugging and improves the convenience of disassembly and maintenance.

[0047] Further, the shuttle valve 30 is connected in parallel with the parking valve group, and both are located downstream of the flow valve 40. The parking valve group includes an electromagnetic reversing valve 60 and a first pressure sensor 70. The electromagnetic reversing valve 60 and the first pressure sensor 70 are sequentially arranged on the circulation pipeline 10. The electromagnetic reversing valve 60 is arranged on the valve block 100. The electromagnetic reversing valve has a first inlet, a first outlet, and a second outlet. The first inlet is connected to the oil inlet 11, the first outlet is connected to the second oil outlet 13, and the second outlet is connected to the outside through the first oil drain port 14. The reversing valve 60 has a relatively set pressurized state and a decompressed state. When the electromagnetic reversing valve 60 is in the pressurized state, the first inlet is connected to the first outlet. When the electromagnetic reversing valve 60 is in the decompressed state, the first inlet is connected to the second outlet. The first pressure sensor 70 is arranged on the valve block 100 and is located between the electromagnetic reversing valve 60 and the second oil outlet 13. The first pressure sensor 70 is used to detect the pressure of the second oil outlet 13, and then to know the pressure at the parking hand brake valve to distinguish whether the vehicle is in the parking state at this time. The electromagnetic reversing valve 60 switches between the pressurized state and the decompressed state according to the pressure of the second oil outlet 13 to change the working state of the parking hand brake valve so that it switches between the unlocked state and the parking state. The coordinated use of the electromagnetic reversing valve 60 and the first pressure sensor 70 realizes the intelligent control of the parking hand brake valve, improves the efficiency and safety of the parking brake, can optimize the braking process, reduce unnecessary energy consumption, and improve the energy efficiency of the vehicle.

[0048] The parking valve group further includes a pressure reducing valve 80, which is arranged on the valve block 100 and located between the flow valve 40 and the electromagnetic reversing valve 60. The pressure reducing valve 80 is used to control the flow of oil in the circulation pipeline 10 located at the front end of the electromagnetic reversing valve 60. The arrangement of the pressure reducing valve 80 further optimizes the pressure regulation of the oil, ensures the stability and reliability of the parking brake system under different working conditions, and avoids the reduction of braking performance due to pressure fluctuations.

[0049] Specifically, the control valve group also includes a relief valve 90 and a second pressure sensor 71, both of which are arranged on the valve block 100, one end of the relief valve 90 is connected to the oil inlet 11, and the other end of the relief valve 90 is connected to the outside through the first oil drain port 14, the relief valve 90 is connected to the circulation pipeline 10, the second pressure sensor 71 is connected to the oil inlet 11, the second pressure sensor 71 can detect the pressure at the oil inlet 11, and the relief valve 90 can adjust the flow of the oil at the oil inlet 11. Specifically, the relief valve 90 and the second pressure sensor 71 are connected to the circulation pipeline 10 located at the front end of the flow valve 40, and the setting of the relief valve 90 and the second pressure sensor 71 can effectively prevent the oil pressure in the circulation pipeline 10 from being too high, providing key high-pressure protection. Under high-pressure demand conditions, the relief valve can release excessive pressure to prevent system overload, while the second pressure sensor monitors the system pressure in real time to ensure operation within a safe range. This design not only improves the vehicle's reliability under extreme conditions, but also protects the system from potential damage and reduces unplanned downtime.

[0050] Furthermore, the brake valve group also includes a third pressure sensor 73, which is arranged on the valve block 100, the third pressure sensor 73 and the circulation pipeline 10, and is located between the flow valve 40 and the parking valve group, and the third pressure sensor 73 is used to detect the pressure value at the first oil port. The third pressure sensor 73 can monitor the oil pressure in the shuttle valve 30 in real time, that is, the pressure value at the brake pedal valve. If the pressure value is abnormal, the vehicle can be stopped and checked in time, thereby improving the safety of vehicle driving.

[0051] The brake valve group further includes a first one-way valve 92, which is disposed on the valve block 100, is communicated with the flow pipe 10, and is located between the flow valve 40 and the shuttle valve 30. The first one-way valve 92 prevents oil from flowing back, protects the flow valve 40 and the shuttle valve 30 from damage, and ensures the safety of the brake system in daily operation.

[0052] In the present application, the parking valve group further includes a second one-way valve 91, which is disposed on the valve block 100, is communicated with the flow line 10, and is located between the pressure reducing valve 80 and the electromagnetic reversing valve 60. The second one-way valve 91 prevents oil backflow, protects the pressure reducing valve 80 and the electromagnetic reversing valve 60 from damage, and ensures the safety of the brake system in daily operation.

[0053] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0054] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0055] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0056] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0057] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0058] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A control valve group, characterized in that: The control valve group comprises: Valve block (100); A circulation pipeline (10) is arranged in the valve block (100), the circulation pipeline (10) having an oil inlet (11), a first oil outlet (12) and a second oil outlet (13) which are arranged in sequence, the oil inlet (11) being arranged on the outer side wall of the valve block (100), the oil inlet (11) being communicated with an oil tank, the first oil outlet (12) being communicated with a brake pedal valve, and the second oil outlet (13) being communicated with a parking brake valve; A filter (20) is arranged on the valve block (100), the filter (20) is in communication with the circulation pipeline (10), and the filter (20) is used to filter impurities in the oil in the circulation pipeline (10); a brake valve group, arranged on the valve block (100) and connected to the circulation pipeline (10), one end of the brake valve group being connected to the oil inlet (11), and the other end of the brake valve group being connected to the first oil outlet (12), the brake valve group being used to control the flow rate of the first oil outlet (12); A parking valve group is arranged on the valve block (100) and is connected to the circulation pipeline (10); one end of the parking valve group is connected to the oil inlet (11), and the other end of the parking valve group is connected to the second oil outlet (13); the parking valve group is used to control the flow of the second oil outlet (13).

2. The control valve assembly according to claim 1, characterized in that: The brake valve group comprises a flow control component and a shuttle valve (30) which are connected in sequence, wherein the shuttle valve (30) is arranged on the valve block (100), the flow control component is located upstream of the shuttle valve (30), the flow control component is connected to the oil inlet (11), and the flow control component can adjust the flow of oil in the circulation pipeline (10) according to the pressure of the first oil outlet (12).

3. The control valve assembly according to claim 2, characterized in that: The shuttle valve (30) has a first oil port, a second oil port and a third oil port which are arranged opposite to each other, the first oil port is in communication with the oil inlet (11), the second oil port and the third oil port are both in communication with the brake pedal valve, and the second oil port and the third oil port form the first oil outlet (12); The shuttle valve (30) has a first state and a second state. When the shuttle valve (30) is in the first state, the first oil port is communicated with the second oil port; when the shuttle valve (30) is in the second state, the first oil port is communicated with the third oil port.

4. The control valve assembly according to claim 3, characterized in that: The flow control component comprises: a flow valve (40) arranged on the valve block (100) and connected to the circulation pipeline (10); the flow valve (40) having a fourth oil port, a fifth oil port and a sixth oil port; the fourth oil port being connected to the oil inlet (11), the fifth oil port being connected to the first oil outlet (12), and the sixth oil port being connected to the outside; the flow valve (40) having a relatively arranged circulation state and a pressure relief state; when the flow valve (40) is in the circulation state, the fourth oil port is connected to the fifth oil port, and the oil in the circulation pipeline (10) can flow from the flow valve (40) to the shuttle valve (30); when the flow valve (40) is in the pressure relief state, the fourth oil port is connected to the sixth oil port, and the oil in the circulation pipeline (10) flows out of the control valve group from the flow valve (40); A pressure relief valve (50) is arranged on the valve block (100) and is connected to the circulation pipeline (10). The pressure relief valve (50) has a seventh oil port, an eighth oil port and a ninth oil port. The seventh oil port is connected to the oil inlet (11), the eighth oil port is connected to the first oil port, and the ninth oil port is connected to the outside. The pressure relief valve (50) also has a tenth oil port. The tenth oil port is connected to the flow valve (40) through a first pressure pipeline. A second pressure pipeline is also arranged between the circulation pipeline (10) and the flow valve (40). The first pressure pipeline and the second pressure pipeline cooperate with each other to drive the flow valve (40) to switch between the circulation state and the pressure relief state.

5. The control valve assembly according to claim 4, characterized in that: The shuttle valve (30) is connected in parallel with the parking valve group and both are located downstream of the flow valve (40). The parking valve group comprises an electromagnetic reversing valve (60) and a first pressure sensor (70). The electromagnetic reversing valve (60) and the first pressure sensor (70) are arranged in sequence on the circulation pipeline (10). The electromagnetic reversing valve (60) is arranged on the valve block (100). The electromagnetic reversing valve (60) has a first inlet, a first outlet and a second outlet. The first inlet is communicated with the oil inlet (11), the first outlet is communicated with the second oil outlet (13), and the second outlet is communicated with the outside. The electromagnetic reversing valve (60) has a pressurized state and a decompressed state that are arranged relatively. When the electromagnetic reversing valve (60) is in the pressurized state, the first inlet is communicated with the first outlet. When the electromagnetic reversing valve (60) is in the decompressed state, the first inlet is communicated with the second outlet. The first pressure sensor (70) is arranged on the valve block (100) and is located between the electromagnetic reversing valve (60) and the second oil outlet (13). The first pressure sensor (70) is used to detect the pressure of the second oil outlet (13). The electromagnetic reversing valve (60) switches between the pressurized state and the depressurized state according to the pressure of the second oil outlet (13).

6. The control valve assembly according to claim 5, characterized in that: The parking valve group further comprises a pressure reducing valve (80), which is arranged on the valve block (100) and located between the flow valve (40) and the electromagnetic reversing valve (60), and the pressure reducing valve (80) is used to control the flow rate of oil in the circulation pipeline (10) located at the front end of the electromagnetic reversing valve (60).

7. The control valve assembly according to claim 4, characterized in that: The control valve group further comprises a relief valve (90) and a second pressure sensor (71). The relief valve (90) and the second pressure sensor (71) are both arranged on the valve block (100). One end of the relief valve (90) is connected to the oil inlet (11), and the other end of the relief valve (90) is connected to the outside. The relief valve (90) is connected to the circulation pipeline (10), and the second pressure sensor (71) is connected to the oil inlet (11). The second pressure sensor (71) can detect the pressure at the oil inlet (11), and the relief valve (90) can adjust the flow rate of the oil at the oil inlet (11).

8. The control valve assembly according to claim 4, characterized in that: The brake valve group also includes a third pressure sensor (73), which is arranged on the valve block (100), on the circulation pipeline (10), and between the flow valve (40) and the parking valve group. The third pressure sensor (73) is used to detect the pressure value at the first oil port.

9. The control valve assembly according to claim 4, characterized in that: The brake valve assembly further comprises a first one-way valve (92), wherein the first one-way valve (92) is arranged on the valve block (100), the first one-way valve (92) is connected to the circulation pipeline (10), and is located between the flow valve (40) and the shuttle valve (30).

10. The control valve assembly according to claim 6, characterized in that: The parking valve assembly further comprises a second one-way valve (91), wherein the second one-way valve (91) is arranged on the valve block (100), the second one-way valve (91) is connected to the flow pipeline (10), and is located between the pressure reducing valve (80) and the electromagnetic reversing valve (60).

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