CN115450974A - Multi-way valve control system and engineering machinery - Google Patents
Multi-way valve control system and engineering machinery Download PDFInfo
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- CN115450974A CN115450974A CN202211073989.XA CN202211073989A CN115450974A CN 115450974 A CN115450974 A CN 115450974A CN 202211073989 A CN202211073989 A CN 202211073989A CN 115450974 A CN115450974 A CN 115450974A
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- 230000007246 mechanism Effects 0.000 claims abstract description 69
- 238000001514 detection method Methods 0.000 claims abstract description 47
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 46
- 239000003921 oil Substances 0.000 claims description 77
- 238000006073 displacement reaction Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
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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
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
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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
- F15B19/00—Testing; Calibrating; Fault detection or monitoring; Simulation or modelling of fluid-pressure systems or apparatus not otherwise provided for
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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
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/08—Servomotor systems incorporating electrically operated control means
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Abstract
The embodiment of the application provides a multi-way valve control system and engineering machinery. The system comprises: the variable pump is used for providing power for the multi-way valve control system; the first multi-way valve is used for transmitting the power of the variable pump to a second multi-way valve connected with the first multi-way valve; the analog quantity detection controller is connected with the first multi-way valve and the second multi-way valve respectively at a first end and a second end and used for feeding back the detected hydraulic oil pressure and flow of the second multi-way valve to the first multi-way valve; and the second multi-way valve is connected with the analog quantity detection controller and the first actuating mechanism and used for transmitting the received hydraulic oil to the first actuating mechanism.
Description
Technical Field
The application relates to the field of engineering machinery, in particular to a multi-way valve control system and engineering machinery.
Background
The multi-way valve is a hydraulic control valve group which consists of a head connection, a plurality of middle connections and a tail connection and is applied to engineering machinery, has a compact structure and is widely applied to the field of engineering machinery. The power of the multi-way valve is provided by the hydraulic pump, and the middle link of the multi-way valve is a working link and is connected with the actuating mechanism to control the actuating mechanism to move.
The existing multi-way valve control system mostly adopts an integrated multi-way valve structure, multi-way working connection is carried out in parallel connection, the multi-way valve control system comprises an LS load sensitive oil circuit and a variable pump, and the variable pump outputs hydraulic oil with different flow and pressure according to feedback of the LS load sensitive oil circuit. In order to meet different flow and pressure requirements of different actuators, a multi-way valve control system in the prior art mostly adopts a multi-connection pump or a flow distributor to enable the flow and the pressure input by the different actuators to be different. Therefore, the multi-way valve system is overlarge in volume and complex in structure, and the conditions of leakage and valve core clamping stagnation are easy to occur in the multi-way valve system.
Disclosure of Invention
The embodiment of the application aims to provide a multi-way valve control system and engineering machinery.
In order to achieve the above object, a first aspect of the present application provides a multiple way valve control system comprising:
the variable pump is used for providing power for the multi-way valve control system;
the first multi-way valve is used for transmitting the power of the variable pump to a second multi-way valve connected with the first multi-way valve;
the analog quantity detection controller is connected with the first multi-way valve and the second multi-way valve respectively at a first end and a second end and used for feeding back the detected hydraulic oil pressure and flow of the second multi-way valve to the first multi-way valve so as to send corresponding feedback signals to the variable pump through the feedback oil port, and after the variable pump adjusts power according to the feedback signals, the hydraulic oil pressure and flow of the second multi-way valve are controlled according to the adjusted power;
and the second multi-way valve is connected with the analog quantity detection controller and the first actuating mechanism and used for transmitting the received hydraulic oil to the first actuating mechanism.
In the embodiment of the present application, the number of the second multi-way valves and the number of the analog quantity detection controllers are multiple, where each analog quantity detection controller is correspondingly connected to one second multi-way valve.
In an embodiment of the present application, a first multiplex valve includes: the valve control unit is connected with the analog quantity detection controller and used for transmitting the power of the variable pump to the second multi-way valve and receiving a feedback signal sent by the analog quantity detection controller; and the first type of working link is connected with the second actuating mechanism and is used for transmitting the power of the variable pump to the second actuating mechanism and controlling the second actuating mechanism to work.
In an embodiment of the present application, the first type of working connection comprises a first main valve and a first pressure compensation valve; the first pressure compensation valve is positioned between the first main valve and the second actuator and used for keeping the pressure difference between the inlet and the outlet of the second actuator within a preset pressure range.
In an embodiment of the present application, the second multiplex valve includes: and the second type of working link is connected with the first actuating mechanism and used for transmitting the received hydraulic oil to the first actuating mechanism and controlling the first actuating mechanism to work.
In an embodiment of the application, the second type of working connection comprises a second main valve and a second pressure compensation valve; the second pressure compensation valve is positioned between the analog quantity detection controller and the second main valve and used for keeping the pressure difference between the inlet and the outlet of the first actuator within a preset pressure range.
In this embodiment, the multi-way valve control system further includes a compensator, and the compensator is connected with the variable pump and the feedback port and is used for determining the required pressure and the required flow of the multi-way valve control system according to the feedback signal of the feedback port, so that the variable pump outputs the required pressure and the required flow.
In the embodiment of the application, under the condition that all the actuating mechanisms are determined to be in the stop working state, the compensator controls the variable pump to keep in the standby state according to the feedback signals sent by the feedback oil ports, and outputs the preset pressure and the preset flow; and under the condition that all the actuating mechanisms are determined to be switched from the stop working state to the working state, the compensator controls the variable pump to correspondingly increase the output pressure and/or increase the output flow according to the feedback signals sent by the feedback oil ports.
In an embodiment of the present application, the first multiplex valve further comprises: the first protection link is connected with the first type of working link in parallel and used for preventing the pressure of hydraulic oil flowing through the first multi-way valve from being overlarge; and/or the second multiplex valve further comprises: and the second protection link is connected with the second type of working link in parallel and is used for preventing the pressure of the hydraulic oil flowing through the second multi-way valve from being overlarge.
In a second aspect of the present application, a work machine is provided that includes the above-described multi-way valve control system.
By adopting the multi-way valve control system, the whole multi-way valve control system is divided into a plurality of parts of multi-way valves, so that the internal space structure of the engineering machinery can be better distributed. In addition, after one multi-way valve is divided into a plurality of multi-way valves, the volume of each multi-way valve is smaller, the structure is simpler, and the problems of leakage and valve core clamping stagnation are easier to solve in the design stage.
Additional features and advantages of embodiments of the present application will be described in detail in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the detailed description serve to explain the embodiments of the application and not to limit the embodiments of the application. In the drawings:
FIG. 1 schematically illustrates a block diagram of a multi-way valve control system according to an embodiment of the present application;
FIG. 2 schematically illustrates a block diagram of a multi-way valve control system according to another embodiment of the present application;
FIG. 3 schematically illustrates a schematic diagram of a multi-way valve control system according to an embodiment of the present application;
FIG. 4 schematically illustrates a first enlarged partial view of a schematic diagram of a multi-way valve control system according to an embodiment of the present application;
FIG. 5 schematically illustrates a second enlarged partial view of a schematic diagram of a multi-way valve control system according to an embodiment of the present application;
FIG. 6 schematically illustrates a third enlarged partial view of a schematic diagram of a multi-way valve control system according to an embodiment of the present application.
Reference numerals
F1-1 first working unit F1-2 second working unit
F1-3 third working connection P1 first oil inlet oil way
T1 first oil outlet oil path LS1 first feedback oil path
A1 First working port B1 of first working unit and second working port of first working unit
F2-1 fourth working gang F2-2 fifth working gang
F2-3 sixth working connection P2 second oil inlet path
T2 second oil outlet oil path LS2 second feedback oil path
Z2-1 seventh working gang Z2-2 eighth working gang
Z2-3 ninth working connection P3 third oil inlet oil way
T3 third oil outlet oil way LS3 third feedback oil way
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it should be understood that the specific embodiments described herein are only used for illustrating and explaining the embodiments of the present application and are not used for limiting the embodiments of the present application. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making creative efforts shall fall within the protection scope of the present application.
FIG. 1 schematically illustrates a multi-way valve control system 100 according to an embodiment of the present application. As shown in fig. 1, in one embodiment of the present application, there is provided a multiple-way valve control system 100, the multiple-way valve control system 100 comprising:
the variable pump 101 is used for providing power for the multi-way valve control system 100;
an oil inlet of the first multi-way valve 102 and a feedback oil port of a feedback oil path are respectively connected with the variable pump 101, and the first multi-way valve 102 is used for transmitting the power of the variable pump 101 to a second multi-way valve 104 connected with the first multi-way valve;
an analog quantity detection controller 103, a first end and a second end of the analog quantity detection controller 103 are respectively connected with the first multi-way valve 102 and the second multi-way valve 104, and the analog quantity detection controller is used for feeding back the detected hydraulic oil pressure and flow of the second multi-way valve 104 to the first multi-way valve 102, sending corresponding feedback signals to the variable pump 101 through a feedback oil port, and controlling the hydraulic oil pressure and flow of the second multi-way valve 104 according to the adjusted power after the variable pump 101 adjusts the power according to the feedback signals;
and the second multi-way valve 104 is connected with the analog quantity detection controller 103 and the first actuating mechanism and is used for transmitting the received hydraulic oil to the first actuating mechanism.
The variable displacement pump is a device which can deliver hydraulic oil with different pressures and flow rates to a hydraulic system according to the feedback of a feedback oil circuit. The multiway valve comprises a plurality of main valves which are connected in parallel and used for controlling the actuating mechanism to move. The analog quantity detection controller can acquire the pressure and the flow of the multi-way valve connected with the analog quantity detection controller and feed the pressure and the flow back to the first multi-way valve, and the first multi-way valve sends the signal to the variable displacement pump. The actuating mechanism is a mechanism for converting hydraulic energy of hydraulic oil into mechanical energy, and common actuating mechanisms in a hydraulic system comprise an oil cylinder, a motor and the like. The first actuator is an actuator connected to the second multiplex valve. The first multi-way valve is directly connected with the variable pump, the second multi-way valve is indirectly connected with the variable pump, and the hydraulic oil flowing into the second multi-way valve firstly passes through the first multi-way valve and then flows into the second multi-way valve. The first multi-way valve and the second multi-way valve are connected in series, and the pressure of hydraulic oil flowing into the first multi-way valve is larger than that of hydraulic oil flowing into the second multi-way valve.
In the multi-way valve control system, a plurality of actuating mechanisms are connected with the main valve of the first multi-way valve or the second multi-way valve, hydraulic oil with different pressures and flow rates is needed in the movement process of the actuating mechanisms, the pressure and flow rate requirements can be fed back to the variable displacement piston pump through the feedback oil circuit, and the variable displacement piston pump confirms the pressure and flow rate needed by the actuating mechanisms according to the feedback signals. The analog quantity detection controller is connected with the second multi-way valve and the first multi-way valve, and obtains the pressure and the flow of the second multi-way valve in real time. And the analog quantity detection controller feeds back the current flow and pressure value to the feedback oil circuit. And the analog quantity detection controller controls the flow input into the second multi-way valve according to the adjusted flow. And the main valve in the second multi-way valve is used for conveying the received hydraulic oil to the first actuating mechanism so as to control the first actuating mechanism to move. The variable pump in the application controls the output flow according to the feedback pressure after receiving the signal of the feedback oil path, so as to ensure that the multi-way valve control system can stably operate.
In a specific embodiment, the lifting oil cylinder and the luffing oil cylinder are two actuating mechanisms of the engineering machinery and are controlled by the multi-way valve control system. The lifting oil cylinder is controlled by a first multi-way valve of the multi-way valve control system, and the amplitude variation oil cylinder is controlled by a second multi-way valve of the multi-way valve control system. Under the condition that the lifting oil cylinder and the amplitude-variable oil cylinder both move, the analog quantity detection controller detects the flow and the pressure of the second multi-way valve, transmits flow and pressure signals to a feedback oil circuit in the first multi-way valve, and directly feeds the flow and the pressure flowing into the lifting oil cylinder back to the feedback oil circuit. And the variable pump outputs a specific flow according to the pressure value fed back so as to ensure that the lifting oil cylinder and the variable amplitude oil cylinder both stably run.
By adopting the multi-way valve control system, the whole multi-way valve control system is divided into a plurality of parts of multi-way valves, so that the internal space structure of the engineering machinery can be better distributed. In addition, after one multi-way valve is divided into a plurality of multi-way valves, the volume of each multi-way valve is smaller, the structure is simpler, and the problems of leakage and valve core clamping stagnation are easier to solve in the design stage.
In one embodiment, the number of the second multiplex valves and the number of the analog quantity detection controllers are both multiple, wherein each analog quantity detection controller is correspondingly connected with one second multiplex valve. For example, if the number of the second multiplex valves is three, the number of the analog quantity detection controllers is also three. The second multi-way valve control module consists of a second multi-way valve and an analog quantity detection controller. And under the condition that the second multi-way valve is a multi-stage second multi-way valve, each stage of multi-way valve is connected with one analog quantity detection controller in series to form a second multi-way valve control unit of the stage, and the second multi-way valve control units of each stage are connected in parallel to form a second multi-way valve control module.
In one specific embodiment, as shown in fig. 2, a multiplex valve control system 200 is provided, which includes a variable displacement pump 101, a first multiplex valve 102, a first stage second multiplex valve 103A, a second stage second multiplex valve 103B, a first analog detection controller 104A, and a second analog detection controller 104B. The first analog quantity detection controller 104A and the second analog quantity detection controller 104B feed back the flow rate and pressure of the second multi-way valve of the stage to the feedback oil path of the first multi-way valve 102, the variable pump 101 adjusts the output flow rate according to the pressure of the feedback oil path, and the first analog quantity detection controller 104A and the second analog quantity detection controller 104B control the flow rate and pressure of the second multi-way valve of the stage according to the detected flow rate and pressure. In the embodiment of the present application, two second multi-way valves are included, but specific embodiments may be three, four or more, and the two second multi-way valves in the embodiment are not limited to the present application.
In one embodiment, the first multiplex valve comprises: the inter-valve control unit is connected with the analog quantity detection controller, and is used for transmitting the power of the variable pump to the second multi-way valve and receiving a feedback signal sent by the analog quantity detection controller; and the first type of working link is connected with the second actuating mechanism and is used for transmitting the power of the variable pump to the second actuating mechanism and controlling the second actuating mechanism to work. The power of the variable pump is transmitted to the hydraulic oil, the hydraulic oil is high-pressure hydraulic oil after passing through the variable pump, and the high-pressure hydraulic oil can drag the actuating mechanism to work. The analog quantity detection controller is connected with the valve control union, receives hydraulic oil transmitted by the valve control union, and controls the flow and the pressure of the second multi-way valve according to the pressure and the flow of the hydraulic oil of the valve control union and the pressure and the flow of the second multi-way valve. And the feedback signal sent by the analog quantity detection controller is the pressure and the flow of the hydraulic oil of the second multi-way valve. The first type of work link is connected with a second execution mechanism, wherein the second execution mechanism and the first type of work link can be multiple, and the first type of work link controls the second execution mechanism to execute corresponding operations.
In one embodiment, the first type of working connection comprises a first main valve and a first pressure compensation valve; the first pressure compensation valve is positioned between the first main valve and the second actuator and used for keeping the pressure difference between the inlet and the outlet of the second actuator within a preset pressure range. The pressure compensation valve is used for keeping the inlet and outlet pressure of the actuating mechanism within a preset range under the condition of external pressure change. The main valve is a multi-position reversing valve which can control the inflow and outflow directions of hydraulic oil in the actuating mechanism so as to control the actuating mechanism to work. The second actuating mechanism is connected with the first multi-way valve. The first type of working combination adopts a valve post-compensation mode, wherein a first pressure compensation valve is positioned between a first main valve and a second actuating mechanism, the pressure difference of hydraulic oil flowing into an inlet and an outlet of the first actuating mechanism is reduced under the condition of large external pressure, and the pressure flowing into an inlet of the actuating mechanism is compensated under the condition of insufficient external pressure, so that the pressure difference of the inlet and the outlet of the first actuating mechanism is kept within a preset range. The work of first type allies oneself with the compensation mode that adopts compensation behind the valve, and hydraulic oil passes through the main valve earlier and gets into actuating mechanism through the compensating valve again, and when oil feed oil circuit pressure in the first multiple unit valve changed, the pressure differential that makes actuating mechanism kept in predetermineeing the within range, and the mode that adopts compensation behind the valve makes pressure compensation more accurate.
In one embodiment, the second multiplex valve comprises: and the second type of working link is connected with the first actuating mechanism and is used for transmitting the received hydraulic oil to the first actuating mechanism and controlling the first actuating mechanism to work. The second multi-way valve comprises at least one second type of working link, and the second type of working link is connected with the first execution mechanism and controls the first execution mechanism to work. The number of the second type of work units is the same as that of the first actuating mechanisms, and the number of the second type of work units is at least one, and each second type of work unit controls one first actuating mechanism.
In one embodiment, the second type of working connection comprises a second main valve and a second pressure compensation valve; the second pressure compensation valve is positioned between the analog quantity detection controller and the second main valve and used for keeping the pressure difference between the inlet and the outlet of the first actuator within a preset pressure range. The second type of working connection adopts a pressure compensation mode of pre-valve compensation, namely hydraulic oil entering the second type of working connection is subjected to pressure compensation through a compensation valve and then passes through a main valve and an actuating mechanism, so that the pressure difference between an inlet and an outlet of the actuating mechanism is maintained within a preset range. The mode of compensation before the valve is adopted, so that the second type of work combination can react more quickly when pressure compensation is carried out.
In one embodiment, the multi-way valve control system further comprises a compensator, wherein the compensator is connected with the variable pump and the feedback oil port and used for determining the required pressure and the required flow of the multi-way valve control system according to the feedback signals of the feedback oil port so that the variable pump outputs the required pressure and the required flow. The compensator is connected with a feedback oil port of the multi-way valve control system, the required pressure value of the multi-way valve control system can be confirmed according to the feedback signal of the feedback oil port, and the compensator adjusts the opening of the variable, so that the variable pump adjusts the output flow according to the control of the compensator.
In a specific embodiment, the feedback oil path is an LS oil path, and the variable displacement pump is a variable displacement plunger pump. The LS oil circuit is mainly used for sensing the state of the actuating mechanism and feeding back to a compensator connected with the variable pump to adjust the output proper flow of the variable pump. The variable plunger pump is connected with the compensator, and the compensator confirms the output flow of variable plunger pump according to the feedback of LS oil circuit, and then makes multiple unit valve control system steady operation, and accurate control output flow saves the energy, raises the efficiency.
In one embodiment, the compensator controls the variable pump to keep a standby state according to a feedback signal sent by the feedback oil port under the condition that all the actuating mechanisms are determined to be in a stop working state, and outputs a preset pressure and a preset flow. And under the condition that all the actuating mechanisms are determined to be switched from the stop working state to the working state, the compensator controls the variable pump to correspondingly increase the output pressure and/or increase the output flow according to the feedback signals sent by the feedback oil ports. When all the actuating mechanisms connected with the multi-way valve control system are in a stop working state, the compensator connected with the variable pump receives a feedback signal of the feedback oil port to control the variable pump to be in a standby state. The standby state refers to outputting a small amount of hydraulic oil, so that the multi-way valve control system enters a low-pressure waiting state. And under the condition that the actuating mechanism enters the working state from the stop working state, the compensator increases the output pressure and/or increases the output flow according to the feedback signal.
In one embodiment, the first multiplex valve further comprises: the first protection link is connected with the first type of working link in parallel and used for preventing the pressure of hydraulic oil flowing through the first multi-way valve from being overlarge; and/or the second multiplex valve further comprises: and the second protection link is connected with the second type of working link in parallel and is used for preventing the pressure of the hydraulic oil flowing through the second multi-way valve from being overlarge. When the number of the second multi-way valves is multiple, the number of the second protection links is also multiple. For example, the second multi-way valve is a four-stage second multi-way valve, and four second protection links are correspondingly arranged. And a second protection link is connected in parallel in the second multi-way valve of each stage of four stages. The first multi-way valve and the second multi-way valve both comprise protection links, each protection link internally comprises an overflow valve, hydraulic oil can overflow under the condition that the pressure flowing into the first multi-way valve and/or the second multi-way valve is overlarge so as to protect pressure receiving parts inside the first multi-way valve and the second multi-way valve, and the pressure receiving parts comprise valve bodies, valve cores of the multi-way valves, transmission pipelines among the valves and the like.
In one embodiment, a work machine is provided that includes the above-described multi-way valve control system.
In a specific embodiment, the multi-way valve control system shown in fig. 3 comprises a variable pump, the variable pump is connected with a hydraulic oil tank, the variable pump is further connected with a first multi-way valve and a compensator, and the compensator controls the output hydraulic oil flow of the variable pump. The first multi-way valve comprises a first protection linkage, a first valve control linkage, a second valve control linkage, a first working linkage (F1-1), a second working linkage (F1-2) and a third working linkage (F1-3), and the first multi-way valve internally comprises a first oil inlet oil way (P1), a first oil outlet oil way (T1) and a first feedback oil way (LS 1). The first protection union comprises an overflow valve, is connected between a first oil inlet oil way (P1) and a first oil outlet oil way (T1), and is used for protecting a pressed part inside the first multi-way valve, and overflowing hydraulic oil under the condition that the pressure exceeds a preset value so as to reduce the pressure. The first inter-valve control link is connected with the first analog quantity detection controller, and the second inter-valve control link is connected with the second analog quantity detection controller, so that hydraulic oil of the variable pump is conveyed to the analog quantity detection controller, and power is transmitted to the second multi-way valve. The first multi-way valve comprises three working connectors, wherein a first working port (A1) and a second working port (B1) of the first working connector (F1-1) are respectively connected with two working oil ports of the executing mechanism. In this embodiment, the second multi-way valve includes a first-stage second multi-way valve and a second-stage second multi-way valve, which are respectively connected to the first analog detection controller and the second analog detection controller. The second multi-way valve of each stage comprises a protection link and a plurality of working links. In this embodiment, the first-stage second multi-way valve includes a second protection linkage, a fourth working linkage (F2-1), a fifth working linkage (F2-2) and a sixth working linkage (F2-3), and the first-stage second multi-way valve includes a second oil inlet path (P2), a second oil outlet path (T2) and a second feedback path (LS 2). The second-stage second multi-way valve comprises a third protection unit, a seventh working unit (Z2-1), an eighth working unit (Z2-2) and a ninth working unit (Z2-3), and the second-stage second multi-way valve internally comprises a third oil inlet oil circuit (P3), a third oil outlet oil circuit (T3) and a third feedback oil circuit (LS 3).
By adopting the multi-way valve control system, the whole multi-way valve control system is divided into a plurality of multi-way valves, so that the internal space structure of the engineering machinery can be better distributed. In addition, after one multi-way valve is divided into a plurality of multi-way valves, the volume of each multi-way valve is smaller, the structure is simpler, and the problems of leakage and valve core clamping stagnation are easier to solve in the design stage. The output flow of the variable pump is changed in real time according to the flow and pressure requirements of the multi-way valve, so that the energy utilization efficiency of the variable pump is greatly improved. By adopting the control system of the multi-way valves, when the multi-way valve control system has faults such as leakage or valve core clamping stagnation, only the multi-way valve at the fault position needs to be checked, and compared with the workload of disassembling and maintaining the whole multi-way valve system, the workload is greatly reduced. The actuating mechanism with high pressure demand is connected with the first multi-way valve, and the actuating mechanism with low pressure demand is connected with the second multi-way valve, so that all working links are prevented from being connected with high-pressure hydraulic oil, and the occurrence of faults is reduced.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Where the terms "first position" and "second position" are two different positions, and where a first feature is "over", "above" and "on" a second feature, it is intended that the first feature is directly over and obliquely above the second feature, or simply means that the first feature is at a higher level than the second feature. "beneath," "under" and "beneath" a first feature includes the first feature being directly beneath and obliquely beneath the second feature, or simply indicating that the first feature is at a lesser elevation than the second feature.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in a specific case to those of ordinary skill in the art.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising one of 8230; \8230;" 8230; "does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.
The above are merely examples of the present application and are not intended to limit the present application. Various modifications and changes may occur to those skilled in the art to which the present application pertains. Any modification, equivalent replacement, improvement or the like made within the spirit and principle of the present application shall be included in the scope of the claims of the present application.
Claims (10)
1. A multiple way valve control system, comprising:
the variable pump is used for providing power for the multi-way valve control system;
the oil inlet of the first multi-way valve and the feedback oil port of the feedback oil path are respectively connected with the variable pump, and the first multi-way valve is used for transmitting the power of the variable pump to a second multi-way valve connected with the first multi-way valve;
the analog quantity detection controller is connected with the first multi-way valve and the second multi-way valve respectively at a first end and a second end, and is used for feeding back the detected hydraulic oil pressure and flow of the second multi-way valve to the first multi-way valve so as to send corresponding feedback signals to the variable pump through the feedback oil port, and after the variable pump adjusts power according to the feedback signals, the hydraulic oil pressure and flow of the second multi-way valve are controlled according to the adjusted power;
and the second multi-way valve is connected with the analog quantity detection controller and the first actuating mechanism and used for transmitting the received hydraulic oil to the first actuating mechanism.
2. The multiple-way valve control system according to claim 1, wherein the number of the second multiple-way valves and the number of the analog quantity detection controllers are both multiple, and each analog quantity detection controller is correspondingly connected with one second multiple-way valve.
3. The multiplex valve control system of claim 1, wherein the first multiplex valve comprises:
the inter-valve control unit is connected with the analog quantity detection controller, and is used for transmitting the power of the variable pump to the second multi-way valve and receiving a feedback signal sent by the analog quantity detection controller;
and the first type of working link is connected with a second actuating mechanism and is used for transmitting the power of the variable pump to the second actuating mechanism and controlling the second actuating mechanism to work.
4. The multiple-way valve control system of claim 3, wherein the first type of working connection comprises a first main valve and a first pressure compensating valve;
the first pressure compensation valve is positioned between the first main valve and the second actuator and used for keeping the pressure difference between the inlet and the outlet of the second actuator within a preset pressure range.
5. The multiplex valve control system of claim 1, wherein the second multiplex valve comprises:
and the second type of working link is connected with the first actuating mechanism and used for transmitting the received hydraulic oil to the first actuating mechanism and controlling the first actuating mechanism to work.
6. The multiple-way valve control system of claim 5, wherein the second type of working connection comprises a second main valve and a second pressure compensating valve;
the second pressure compensation valve is positioned between the analog quantity detection controller and the second main valve and used for keeping the pressure difference between the inlet and the outlet of the first actuator within a preset pressure range.
7. The multiple-way valve control system according to claim 1, further comprising a compensator connected to the variable pump and the feedback port for determining a required pressure and a required flow rate of the multiple-way valve control system according to a feedback signal of the feedback port, so that the variable pump outputs the required pressure and the required flow rate.
8. The multiple-way valve control system according to claim 7, wherein the compensator controls the variable pump to maintain a standby state according to the feedback signal sent by the feedback oil port and outputs a preset pressure and a preset flow rate under the condition that all the actuators are determined to be in a stop working state;
and under the condition that all the actuating mechanisms are determined to be switched from the stop working state to the working state, the compensator controls the variable pump to correspondingly increase the output pressure and/or increase the output flow according to the feedback signals sent by the feedback oil ports.
9. The multiplex valve control system of claim 1, wherein the first multiplex valve further comprises: the first protection link is connected with the working link of the first type in parallel and used for preventing the pressure of hydraulic oil flowing through the first multi-way valve from being overlarge; and/or
The second multiplex valve further comprises: and the second protection link is connected with the second type of working link in parallel and is used for preventing the pressure of hydraulic oil flowing through the second multi-way valve from being overlarge.
10. A working machine comprising a multiple-way valve control system according to any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211073989.XA CN115450974A (en) | 2022-09-02 | 2022-09-02 | Multi-way valve control system and engineering machinery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211073989.XA CN115450974A (en) | 2022-09-02 | 2022-09-02 | Multi-way valve control system and engineering machinery |
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| Publication Number | Publication Date |
|---|---|
| CN115450974A true CN115450974A (en) | 2022-12-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211073989.XA Pending CN115450974A (en) | 2022-09-02 | 2022-09-02 | Multi-way valve control system and engineering machinery |
Country Status (1)
| Country | Link |
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| CN (1) | CN115450974A (en) |
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2022
- 2022-09-02 CN CN202211073989.XA patent/CN115450974A/en active Pending
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