CN112762037A - Quick-insertion valve group, remote hydraulic control system and engineering vehicle - Google Patents
Quick-insertion valve group, remote hydraulic control system and engineering vehicle Download PDFInfo
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- CN112762037A CN112762037A CN202011356695.9A CN202011356695A CN112762037A CN 112762037 A CN112762037 A CN 112762037A CN 202011356695 A CN202011356695 A CN 202011356695A CN 112762037 A CN112762037 A CN 112762037A
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- 238000003780 insertion Methods 0.000 title abstract description 9
- 230000001105 regulatory effect Effects 0.000 claims abstract description 9
- 239000003921 oil Substances 0.000 claims description 397
- 239000010720 hydraulic oil Substances 0.000 claims description 10
- 230000001276 controlling effect Effects 0.000 abstract description 3
- 239000000725 suspension Substances 0.000 description 8
- 238000006073 displacement reaction Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002860 competitive effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/022—Flow-dividers; Priority valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
- F16H63/02—Final output mechanisms therefor; Actuating means for the final output mechanisms
- F16H63/30—Constructional features of the final output mechanisms
- F16H63/34—Locking or disabling mechanisms
- F16H63/3416—Parking lock mechanisms or brakes in the transmission
- F16H63/3483—Parking lock mechanisms or brakes in the transmission with hydraulic actuating means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/10—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B2013/002—Modular valves, i.e. consisting of an assembly of interchangeable components
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The disclosure relates to a quick-plug valve bank, a remote hydraulic control system and an engineering vehicle. The quick-insertion valve group comprises a valve body, a third oil duct, a fifth oil duct and an eighth oil duct are formed in the valve body, a safety overflow valve is arranged on a passage of the eighth oil duct, a throttle valve and a manual flow regulating valve are arranged on a passage of the third oil duct, and a connecting point of the third oil duct and the eighth oil duct is located between the throttle valve and the manual flow regulating valve. The throttle valve, the manual flow regulating valve and the safety overflow valve are arranged in the oil duct in the valve body, the throttle valve is used for limiting the flow of the external oil source, the manual flow regulating valve is used for manually controlling the flow of the external oil source, and the safety overflow valve is used for limiting the pressure of the external oil source, so that the external oil source is kept in a reasonable range, the vehicle fault caused by the overlarge hydraulic pressure of the external oil source is effectively avoided, and the working reliability and stability are improved.
Description
Technical Field
The utility model relates to the technical field of engineering machinery, especially, relate to a fast valve group, long-range hydraulic control system and engineering vehicle of inserting.
Background
With the rapid development of engineering vehicles and the expansion of application fields, the functions of engineering vehicles are developed in a diversified manner, when an oil supply system cannot work (the fault has many factors, such as the fault can be from the inside of a brake system or from the outside of the brake system, for example, an engine fault can cause the oil supply circuit of a working device to have no driving force and cannot work), an external pressure oil source needs to be connected, and the external pressure oil source can be a pressure oil source of a traction vehicle or a portable manual pump. The specific scheme includes, but is not limited to, installing a quick connector or similar elements (such as a pressure measuring connector, a sampling connector and the like are also small quick connectors) on an oil path of the brake accumulator, and designing a pressure line matched with the quick connector. However, multiple or continuous access of the external oil source is also limited by various conditions, and the damage of the faulty vehicle actuator caused by the access of too high pressure causes secondary fault, so that the vehicle completely loses the operation function.
In addition, in order to adapt to a narrow working space and improve competitive advantages, the engineering machinery tends to be developed towards low cost, high speed and low oil consumption, the light weight and the small size of the engineering machinery are required, so that the hydraulic system of the engineering machinery is small in arrangement space, inconvenient to install and maintain
Disclosure of Invention
The inventor researches and discovers that the technical problem of vehicle failure caused by overlarge hydraulic pressure of an external oil source exists in the related technology.
In view of this, the embodiment of the present disclosure provides a quick-plug valve bank, a remote hydraulic control system and an engineering vehicle, which can prevent a vehicle fault caused by an excessive hydraulic pressure of an external oil source, and improve the reliability and stability of operation.
Some embodiments of the present disclosure provide a fast valve group of inserting, including the valve body, be formed with the third oil duct in it, fifth oil duct and eighth oil duct, be equipped with first working oil port on the valve body, the second working oil port, third working oil port and fourth working oil port, first working oil port and second working oil port pass through the third oil duct intercommunication, third working oil port and fourth working oil port pass through the fifth oil duct intercommunication, the third oil duct passes through the eighth oil duct and communicates with the fifth oil duct, be equipped with safe overflow valve on the passageway of eighth oil duct, be equipped with choke valve and manual flow control valve on the passageway of third oil duct, the tie point of third oil duct and eighth oil duct is located between choke valve and the manual flow control valve.
In some embodiments, a sixth oil passage and a seventh oil passage are further formed in the valve body, a pressure measuring oil port communicated with the seventh oil passage is arranged on the valve body, the third oil passage is communicated with the eighth oil passage through the sixth oil passage, and the sixth oil passage is communicated with the seventh oil passage.
In some embodiments, a fourth oil passage communicated with the sixth oil passage is further formed in the valve body, a load-sensitive oil port communicated with the fourth oil passage is formed in the valve body, and a one-way valve is arranged on a passage of the fourth oil passage.
In some embodiments, the fourth oil passage and the seventh oil passage are located between the third oil passage and the fifth oil passage, and the pressure measuring oil port and the load sensing oil port are located on two opposite sides of the valve body, respectively.
In some embodiments, a first oil passage and a second oil passage are further formed in the valve body, a first oil return port, a second oil return port, a fifth working oil port and a sixth working oil port are formed in the valve body, the first oil return port and the second oil return port are communicated through the first oil passage, and the fifth working oil port and the sixth working oil port are communicated through the second oil passage.
In some embodiments, the first oil return port, the fifth working oil port, the first working oil port and the third working oil port are located on the same side of the valve body and are all provided with the quick-connect connector, and the second oil return port, the sixth working oil port, the second working oil port, the load sensitive oil port and the fourth working oil port are located on the other side of the valve body.
In some embodiments, a first male quick connector is arranged on the first oil return port, a second male quick connector is arranged on the fifth working oil port, a third male quick connector is arranged on the first working oil port, a female quick connector is arranged on the third working oil port, a fourth male quick connector is arranged on the pressure measuring oil port, a first oil port connector is arranged on the second oil return port, a second oil port connector is arranged on the sixth working oil port, a third oil port connector is arranged on the second working oil port, a fourth oil port connector is arranged on the load sensitive oil port, and a fifth oil port connector is arranged on the fourth working oil port.
In some embodiments, the maximum flow of the manual flow control valve is configured to be 100L/min.
Some embodiments of the present disclosure provide a remote hydraulic control system, including a parking brake cylinder, a hydraulic oil tank and the aforementioned quick-plugging valve set, wherein the second oil return port is communicated with the hydraulic oil tank, the sixth working oil port is communicated with a chamber of the parking brake cylinder, the second working oil port is communicated with an oil inlet passage of a working device, the load sensitive oil port is communicated with a load passage of the working device, and the fourth working oil port is communicated with an oil return passage of the working device.
Some embodiments of the present disclosure provide a work vehicle, including the aforementioned quick-plug valve group, or the aforementioned remote hydraulic control system.
Therefore, according to the embodiment of the disclosure, the throttle valve, the manual flow control valve and the safety overflow valve are arranged in the oil duct in the valve body, the throttle valve is used for limiting the flow of the external oil source, the manual flow control valve is used for manually controlling the flow of the external oil source, and the safety overflow valve is used for limiting the pressure of the external oil source, so that the external oil source is kept in a reasonable range, the vehicle fault caused by overlarge hydraulic pressure of the external oil source is effectively avoided, and the working reliability and stability are improved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description, serve to explain the principles of the disclosure.
The present disclosure may be more clearly understood from the following detailed description, taken with reference to the accompanying drawings, in which:
fig. 1 is a perspective view of some embodiments of a quick-insertion valve block of the present disclosure;
fig. 2 is a perspective view of some embodiments of the disclosed quick-insertion valve block from another perspective;
FIG. 3 is a structural schematic diagram of some embodiments of the disclosed quick-insertion valve block;
FIG. 4 is a schematic block diagram of some embodiments of the disclosed remote hydraulic control system.
Description of the reference numerals
0. A throttle valve; 1. a valve body; 2. a manual flow regulating valve; 3. a safety overflow valve; 4. a one-way valve; 5. a first male quick connector; 6. a second male quick connector; 7. a third male quick connector; 8. a female quick connector; 9. a fourth male quick connector; 10. a first port connection; 11. a second port connection; 12. a third port connection; 13. a fourth port connection; 14. a fifth port connector; 20. a parking brake cylinder; 30. a service brake cylinder; 40. a combination valve; 50. a parking solenoid valve; 60. a brake pedal; 70. a variable displacement plunger pump; 80. an oil tank; s1, a first oil passage; s2, a second oil passage; s3, a third oil passage; s4, a fourth oil duct; s5, a fifth oil duct; s6, a sixth oil duct; s7, a seventh oil duct; s8, an eighth oil duct; t1, a first oil return port; b0 and a fifth working oil port; p0, a first working oil port; r1 and a third working oil port; GP, pressure measuring oil port; t0, second oil return port; b1 and a sixth working oil port; p1 and a second working oil port; LS and a load sensitive oil port; r0 and a fourth working oil port.
Detailed Description
Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. The description of the exemplary embodiments is merely illustrative and is in no way intended to limit the disclosure, its application, or uses. The present disclosure may be embodied in many different forms and is not limited to the embodiments herein. These embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. It should be noted that: the relative arrangement of parts and steps, the composition of materials, numerical expressions and numerical values set forth in these embodiments are to be construed as merely illustrative, and not as limitative, unless specifically stated otherwise.
The use of "first," "second," and similar terms in this disclosure is not intended to indicate any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element preceding the word covers the element listed after the word, and does not exclude the possibility that other elements are also covered. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.
In the present disclosure, when a specific device is described as being located between a first device and a second device, there may or may not be intervening devices between the specific device and the first device or the second device. When a particular device is described as being coupled to other devices, the particular device may be directly coupled to the other devices without intervening devices or may be directly coupled to the other devices with intervening devices.
All terms used in the present disclosure have the same meaning as understood by one of ordinary skill in the art to which the present disclosure belongs, unless otherwise specifically defined. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate.
Referring to fig. 1 to 3, some embodiments of the present disclosure provide a quick-insertion valve set, including a valve body 1 having a first oil passage S1, a second oil passage S2, a third oil passage S3, a fourth oil passage S4, a fifth oil passage S5, a sixth oil passage S6, a seventh oil passage S7, and an eighth oil passage S8 formed therein, the valve body 1 being provided with a first working oil port P0, a second working oil port P1, a third working oil port R1, a fourth working oil port R0, a pressure measuring oil port GP, a load sensing oil port LS, a first oil return port T1, a second oil return port T0, a fifth working oil port B0, and a sixth working oil port B1, wherein the first working oil port P0 and the second working oil port P1 are communicated with each other through a third oil passage S3, the third working oil port R1 and the fourth working oil port R0 are communicated with each other through a fifth oil passage S5, and an overflow valve 5 is provided on the eighth oil passage S5, a throttle valve 0 and a manual flow rate regulating valve 2 are provided on a passage of the third oil passage S3, and a connection point a of the third oil passage S3 and the eighth oil passage S8 is located between the throttle valve 0 and the manual flow rate regulating valve 2.
In the illustrative embodiment, a throttle valve 0, a manual flow control valve 2 and a safety overflow valve 3 are arranged in a third oil passage S3 in a valve body 1, the throttle valve 0 is used for limiting the flow of an external oil source, the manual flow control valve 2 is used for manually controlling the flow of the external oil source, the safety overflow valve 3 is used for limiting the pressure of the external oil source so as to keep the pressure in a reasonable range, when a vehicle oil supply pump cannot normally work (when an engine cannot normally work and the oil supply pump loses a power source or a problem occurs in an oil supply pump system and cannot normally supply oil), pressure oil in a standby small-capacity manual pump or the external power source is introduced into the third oil passage S3, the pressure of the power source is limited by the safety overflow valve 3, the flow is adjusted through the manual flow control valve 2 so as to provide a stable and reliable pressure oil source for a vehicle, thereby effectively avoiding vehicle faults caused by overlarge hydraulic pressure of the external oil, the reliability and stability of the work are improved. When the vehicle normally runs, if other vehicles need to be externally connected with a power source or operate other machines, pressure oil can be led out through the third oil channel S3 to provide a power source for other oil channels, the pressure of the power source is limited by the safety overflow valve 3, and the flow is adjusted through the manual flow adjusting valve 2. The return oil may flow back to the oil tank through the fourth working port R0 on the fifth oil passage S5. The third oil duct S3 can stably lead in an external oil source and can also stably lead out pressure oil to push an external machine to work, so that the utilization rate of the quick-insertion valve group is improved, the structural design is simplified, the occupied space is reduced, and the light-weight design requirement is met.
In some embodiments, the maximum flow of the manual flow control valve 2 is configured to be 100L/min, ensuring flow stability.
In some embodiments, as shown in fig. 3, the pressure measuring oil port GP is communicated with the seventh oil passage S7, the third oil passage S3 is communicated with the eighth oil passage S8 through the sixth oil passage S6, and the sixth oil passage S6 is communicated with the seventh oil passage S7, so that the working pressure of the external tool can be measured through the pressure measuring oil port GP, and when the external tool is not connected, the system pressure of the working system can be measured through the pressure measuring oil port GP.
In some embodiments, as shown in fig. 3, the fourth oil passage S4 communicates with the sixth oil passage S6, the load-sensitive oil port LS communicating with the fourth oil passage S4 is provided in the valve body 1, and the check valve 4 is provided in the passage of the fourth oil passage S4. The load sensitive oil port LS is communicated with a load oil circuit of the working device, provides a load sensitive signal, and can feed back the load pressure of an external machine tool to a control port of the oil supply pump, so that the control of the discharge capacity of the oil supply pump is realized.
In order to reduce the occupied space, in some embodiments, as shown in fig. 3, the seventh oil passage S7 is located between the third oil passage S3 and the fifth oil passage S5, and the pressure measuring oil port GP and the load sensing oil port LS are located at opposite sides of the valve body 1, respectively.
In some embodiments, as shown in fig. 3, the first oil return port T1 and the second oil return port T0 communicate with each other through the first oil passage S1, and the fifth working port B0 and the sixth working port B1 communicate with each other through the second oil passage S2.
When the rigidity of a suspension system of the vehicle needs to be adjusted and pressure oil in the energy accumulator needs to be released, the pressure oil can flow back to the oil tank from the first oil passage S1, and when the rigidity of the suspension system needs to be adjusted and hydraulic oil in the energy accumulator needs to be supplemented, the pressure oil can be led out through the third oil passage S3 to supplement pressure to the energy accumulator of the suspension system.
When the vehicle can not be normally started, the external oil source prepared in advance can be utilized, pressure oil is injected into the cavity of the parking brake oil cylinder through the second oil duct S2, the parking brake spring is compressed, the parking brake is released, the fault vehicle can be moved, or the trailer rod is utilized to carry out the trailer.
In order to reduce the occupied space, in some embodiments, as shown in fig. 3, the first oil return port T1, the fifth working oil port B0, the first working oil port P0, and the third working oil port R1 are all located on the same side of the valve body 1 and are all provided with a quick-connect coupling, and the second oil return port T0, the sixth working oil port B1, the second working oil port P1, the load-sensitive oil port LS, and the fourth working oil port R0 are all located on the other side of the valve body 1. The structure is reasonable, the occupied space is small, and the practicability is high.
In some embodiments, in order to realize quick plug connection and improve connection convenience, as shown in fig. 2 and 3, a first male quick connector 5 is disposed on the first oil return port T1, a second male quick connector 6 is disposed on the fifth working oil port B0, a third male quick connector 7 is disposed on the first working oil port P0, a female quick connector 8 is disposed on the third working oil port R1, a fourth male quick connector 9 is disposed on the pressure measuring oil port GP, a first oil port connector 10 is disposed on the second oil return port T0, a second oil port connector 11 is disposed on the sixth working oil port B1, a third oil port connector 12 is disposed on the second working oil port P1, a fourth oil port connector 13 is disposed on the load-sensitive oil port LS, and a fifth oil port connector 14 is disposed on the fourth working oil port R0. The first working oil port P0 and the third working oil port R1 are provided with paired male and female quick connectors, and when pressure oil output by the first working oil port P0 is used as a power source to push an external machine tool to work, return oil of a working system of the external machine tool flows back to an oil tank through the third working oil port R1 via the fifth oil duct S5 and the fourth working oil port R0.
As shown in fig. 4, some embodiments of the present disclosure provide a remote hydraulic control system, which includes the aforementioned quick-plug valve set, a parking brake cylinder 20, a service brake cylinder 30, a combination valve 40, a parking solenoid valve 50, a brake pedal 60, a variable displacement plunger pump 70, and a hydraulic oil tank 80, wherein a second oil return port T0 is communicated with the hydraulic oil tank 80, a sixth working oil port B1 is communicated with a chamber of the parking brake cylinder 20, a second working oil port P1 is communicated with a working device oil inlet path, a load sensitive oil port LS is communicated with a working device load oil path, and a fourth working oil port R0 is communicated with a working device oil return path.
Referring to fig. 1 to 4, a first male quick connector 5 is installed at a first oil return port T1 of the first oil duct S1, a first oil port joint 10 on the second oil return port T0 is communicated with a hydraulic oil tank 80 through a hose assembly, when the stiffness of the suspension system needs to be adjusted to release pressure oil in the accumulator, the pressure oil flows back to the hydraulic oil tank 80 from the first oil duct S1, and when the stiffness of the suspension system needs to be supplemented to the hydraulic oil in the accumulator, the pressure oil is led out from a third male quick connector 7 on a first working oil port P0 of the third oil duct S3 to supplement pressure to the accumulator of the suspension system.
Referring to fig. 1 to 4, a second male quick connector 6 is installed at a fifth working oil port B0 of the second oil passage S2, and a second oil port joint 11 of the sixth working oil port B1 is connected to a chamber of a parking brake cylinder 20 of the brake, so that when an oil supply pump cannot supply oil normally, a pressure oil is injected into the third male quick connector 6 through a second passage S2 by using an external oil source prepared in advance, a parking brake spring is compressed, parking brake is released, and a faulty vehicle can be moved or towed by using a towing lever.
Referring to fig. 1 to 4, a third male-female connector 7 is installed at a first working oil port P0 of the third oil passage S3, a third oil port joint 12 on the second working oil port P1 is connected to an oil inlet passage of the combination valve 40, and is communicated with pressure oil outlets of a parking brake system, a service brake system and an oil supply pump of the engineering vehicle after passing through the combination valve 40, pressure oil at an oil outlet of the oil supply pump is divided into three paths, one path is a working device operation pressure oil source, the other path is a pressure oil source for service brake and parking brake of the vehicle, the third path is a pressure oil source for the combination valve 40, when the vehicle normally operates, if other vehicles need external power sources or operate other machines, pressure oil can be led out through the third male quick connector 7 to provide power sources for other oil ways, the pressure of the power sources is limited by the safety overflow valve 3, and the flow is adjusted through the manual flow adjusting valve 2.
When the vehicle oil supply pump (the engine can not work normally and the oil supply pump loses power source or the oil supply pump system has problems and can not work normally), the pressure oil in the spare small-capacity manual pump or the external power source is led into the third oil duct S3 through the third male quick connector 7 to provide a stable and reliable pressure oil source for the vehicle, the pressure oil enters the combination valve 40, the parking brake system and the oil supply system of the working device through the quick change block, the combined valve 40 may be used to operate the suspension system or winch to release the parking brake, apply the service brake, when the working device of the engineering vehicle is operated as required, the pressure oil source can be used for lifting or descending the working device for several times, the pressure of the pressure oil source is ensured by the safety overflow valve 3, and the flow is adjusted by the manual flow adjusting valve 2.
Referring to fig. 1 to 4, the third working oil port R1 of the fifth oil passage S5 is connected to a quick connector paired with the first working oil port P0, and when the pressure oil output from the first working oil port P0 is used as a power source to push the external attachment tool to work, the return oil of the external attachment tool working system flows back to the oil tank 80 through the third working oil port R1.
Referring to fig. 1 to 4, the pressure measuring oil port GP of the seventh oil passage S7 may be used to measure the working pressure of the external tool, and when the external tool is not connected, the pressure measuring oil port GP may be used to measure the pressure of the working system.
As shown in fig. 1 to 4, the load sensitive oil port LS of the fourth oil passage S4 is used to feed back the load pressure of the external tool to the control port of the oil supply pump, so as to control the displacement of the oil supply pump.
Some embodiments of the present disclosure provide a work vehicle, including the aforementioned quick-plug valve group, or the aforementioned remote hydraulic control system. The engineering vehicle has the beneficial technical effects correspondingly. In some embodiments, the quick-insertion valve group is installed on the outer side of a frame of a working vehicle, and the position is easy to operate.
The disclosed embodiment solves the problems of crowded valve block assembly, complex assembly and inconvenient maintenance of the existing engineering machinery hydraulic system, and under the condition that an engineering vehicle oil supply pump (the engine cannot normally work and the oil supply pump loses a power source or the oil supply pump system fails to normally supply oil) cannot normally work, the quick-plug valve bank provides a stable and reliable pressure oil source for a vehicle by using a standby small-capacity manual pump or an external power source, so that the long-distance and long-time trailer braking requirement is met. When the working device of the engineering vehicle is required, the working device can be lifted for a short time, and when the vehicle runs normally, the valve group can provide the continuous and stable pressure oil source function for other vehicles. Moreover, oil return and oil charge of rigidity adjustment of the vehicle suspension system can be realized through the valve bank, and the valve bank has high practicability and practicability.
Thus, various embodiments of the present disclosure have been described in detail. Some details that are well known in the art have not been described in order to avoid obscuring the concepts of the present disclosure. It will be fully apparent to those skilled in the art from the foregoing description how to practice the presently disclosed embodiments.
Although some specific embodiments of the present disclosure have been described in detail by way of example, it should be understood by those skilled in the art that the foregoing examples are for purposes of illustration only and are not intended to limit the scope of the present disclosure. It will be understood by those skilled in the art that various changes may be made in the above embodiments or equivalents may be substituted for elements thereof without departing from the scope and spirit of the present disclosure. The scope of the present disclosure is defined by the appended claims.
Claims (10)
1. The quick-plug valve group is characterized by comprising a valve body (1), wherein a third oil duct (S3), a fifth oil duct (S5) and an eighth oil duct (S8) are formed in the valve body (1), a first working oil port (P0), a second working oil port (P1), a third working oil port (R1) and a fourth working oil port (R0) are arranged on the valve body (1), the first working oil port (P0) and the second working oil port (P1) are communicated through a third oil duct (S3), the third working oil port (R1) and the fourth working oil port (R0) are communicated through the fifth oil duct (S5), a third oil duct (S3) is communicated with the fifth oil duct (S5) through the eighth oil duct (S8), a safety valve (3) is arranged on a passage of the eighth oil duct (S8), and a throttle valve (2) and a manual flow regulating valve (2) are arranged on the third oil duct (S3), a connection point of the third oil passage (S3) and the eighth oil passage (S8) is located between the throttle valve (0) and the manual flow rate adjustment valve (2).
2. The quick-plug valve group according to claim 1, wherein a sixth oil passage (S6) and a seventh oil passage (S7) are further formed in the valve body (1), a pressure measuring oil port (GP) communicated with the seventh oil passage (S7) is formed in the valve body (1), the third oil passage (S3) is communicated with the eighth oil passage (S8) through the sixth oil passage (S6), and the sixth oil passage (S6) is communicated with the seventh oil passage (S7).
3. The quick-plug valve group according to claim 2, wherein a fourth oil channel (S4) communicated with the sixth oil channel (S6) is further formed in the valve body (1), a load-sensitive oil port (LS) communicated with the fourth oil channel (S4) is formed in the valve body (1), and a check valve (4) is arranged on a passage of the fourth oil channel (S4).
4. The quick-insert valve group according to claim 3, wherein the fourth oil passage (S4) and the seventh oil passage (S7) are both located between the third oil passage (S3) and the fifth oil passage (S5), and the pressure measuring oil port (GP) and the load sensitive oil port (LS) are respectively located on opposite sides of the valve body (1).
5. The quick-insert valve group according to claim 3, wherein a first oil channel (S1) and a second oil channel (S2) are further formed in the valve body (1), a first oil return port (T1), a second oil return port (T0), a fifth working oil port (B0) and a sixth working oil port (B1) are formed in the valve body (1), the first oil return port (T1) and the second oil return port (T0) are communicated through the first oil channel (S1), and the fifth working oil port (B0) and the sixth working oil port (B1) are communicated through the second oil channel (S2).
6. The quick-plug valve group according to claim 5, wherein the first oil return port (T1), the fifth working oil port (B0), the first working oil port (P0) and the third working oil port (R1) are all located on the same side of the valve body (1) and are all provided with a quick-plug connector, and the second oil return port (T0), the sixth working oil port (B1), the second working oil port (P1), the load sensitive oil port (LS) and the fourth working oil port (R0) are all located on the other side of the valve body (1).
7. The quick-plug valve bank according to claim 5, characterized in that a first male quick-plug connector (5) is arranged on the first oil return port (T1), a second male quick-plug connector (6) is arranged on the fifth working oil port (B0), a third male quick-plug connector (7) is arranged on the first working oil port (P0), a female quick-plug connector (8) is arranged on the third working oil port (R1), a fourth male quick-plug connector (9) is arranged on the pressure measuring oil port (GP), a first oil port connector (10) is arranged on the second oil return port (T0), a second oil port connector (11) is arranged on the sixth working oil port (B1), a third oil port connector (12) is arranged on the second working oil port (P1), a fourth oil port connector (13) is arranged on the load sensitive oil port (LS), and a fifth oil port connector (14) is arranged on the fourth working oil port (R0).
8. Valve group according to claim 1, characterized in that the maximum flow of the manual flow regulating valve (2) is configured to be 100L/min.
9. The remote hydraulic control system is characterized by comprising a parking brake cylinder (20), a hydraulic oil tank (80) and the quick-plug valve bank of claim 5, wherein the second oil return port (T0) is communicated with the hydraulic oil tank (80), the sixth working oil port (B1) is communicated with a cavity of the parking brake cylinder (20), the second working oil port (P1) is communicated with a working device oil inlet oil way, the load sensitive oil port (LS) is communicated with a working device load oil way, and the fourth working oil port (R0) is communicated with a working device oil return oil way.
10. A working vehicle, characterized by comprising the quick-plug valve group of any one of claims 1 to 8 or the remote hydraulic control system of claim 9.
Priority Applications (1)
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| CN202011356695.9A CN112762037A (en) | 2020-11-27 | 2020-11-27 | Quick-insertion valve group, remote hydraulic control system and engineering vehicle |
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| CN202011356695.9A CN112762037A (en) | 2020-11-27 | 2020-11-27 | Quick-insertion valve group, remote hydraulic control system and engineering vehicle |
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