A diverter valve block

Abstract

The present invention relates to the field of hydraulic valves, and in particular to a diverter valve block. It comprises a valve block body and a priority flow valve core, wherein the priority flow valve core is arranged on the side surface of the valve block body, the priority flow valve core is connected to the main pump oil circuit, the priority flow valve core is respectively connected to the steering mechanism and the traveling mechanism oil circuit, and the priority flow valve core supplies oil to the steering mechanism first. When the hydraulic system is working, the main pump supplies oil to each actuator. Since the priority flow valve core is respectively connected to the steering mechanism and the traveling mechanism oil circuit, the priority flow valve core supplies oil to the steering mechanism first. The priority flow valve core ensures through flow control that no matter how the pressure of the non-priority port changes, as long as there is a demand at the priority port, the system flow first meets the demand of the priority port, thereby ensuring the priority of the steering system function of the working device. On the premise of ensuring the priority of the steering system function, the hydraulic oil flow of the traveling mechanism is given the second priority, thereby ensuring the oil flow demand of the steering mechanism in the working device.

Description

Technical Field

[0001] The invention relates to the field of hydraulic valves, and in particular to a diverter valve block. Background Art

[0002] At present, the hydraulic steering process of low-speed vehicles is as follows (taking right steering as an example): when the steering wheel is stationary, the valve core is in a neutral position relative to the valve sleeve. When the steering wheel is turned to the right, the steering gear valve core opens, and the oil from the oil pump enters the oil cylinder through the steering gear, pushing the piston to the right. The piston rod pushes the steering rocker arm to swing, causing the front wheel to deflect to the right and at the same time returning the steering gear valve core. The valve core returns to the neutral position, and the piston stops at this position and no longer moves to the right, that is, the steering wheel realizes servo control of the wheel. If continuous right steering is required, the steering wheel should continue to be turned to the right. Since one pump in the tractor drives multiple actuators, the uneven distribution of system flow leads to the inability to guarantee the oil volume of the steering mechanism. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a diverter valve block to solve the problem that the oil quantity of the steering mechanism cannot be guaranteed.

[0004] The technical solution of the present invention to solve the above technical problems is as follows: a diverter valve block, including a valve block body and a priority flow valve core, the priority flow valve core is arranged on the valve block body, the priority flow valve core is connected to the main pump oil circuit, the priority flow valve core is respectively connected to the steering mechanism and the walking mechanism oil circuit, and the priority flow valve core preferentially supplies oil to the steering mechanism.

[0005] Furthermore, the priority flow valve core includes a first priority flow valve and a second priority flow valve, the oil inlet of the first priority flow valve is connected to the main pump oil circuit, the two oil outlets of the first priority flow valve are respectively connected to the steering mechanism and the oil inlet of the second priority flow valve, and the two oil outlets of the second priority flow valve are respectively connected to the shifting component and the lifting component of the walking mechanism.

[0006] Furthermore, a pressure collection component is provided on the valve block body at a side opposite to the priority flow valve core position, the pressure collection component is connected to the main pump control oil circuit, and the pressure collection component is used to collect the load pressure of each actuator in the hydraulic system.

[0007] Furthermore, a detection oil port group is provided on the upper surface of the valve block body, and the detection oil port group is connected to the oil circuit of the pressure collection component.

[0008] Furthermore, the detection oil port group includes a system pressure collection port, a steering system pressure collection port, a shift pressure collection port, a lifting system pressure collection port, a maximum pressure collection port, a steering system feedback pressure collection port and a lifting system feedback pressure collection port.

[0009] Furthermore, the shift pressure collection port, the lifting system pressure collection port and the lifting system feedback pressure collection port are all arranged on the side surface of the valve block body adjacent to the priority flow valve core, the system pressure collection port, the steering system pressure collection port, the maximum pressure collection port and the steering system feedback pressure collection port.

[0010] The present invention provides a diverter valve block, comprising a valve block body and a priority flow valve core, wherein the priority flow valve core is arranged on the valve block body, the priority flow valve core is connected to the main pump oil circuit, the priority flow valve core is respectively connected to the steering mechanism and the traveling mechanism oil circuit, and the priority flow valve core supplies oil to the steering mechanism first. In this way, when the hydraulic system is working, the main pump supplies oil to each actuator, and since the priority flow valve core is respectively connected to the steering mechanism and the traveling mechanism oil circuit, the priority flow valve core supplies oil to the steering mechanism first, and the priority flow valve core ensures through flow control that no matter how the pressure of the non-priority port changes, as long as there is a demand at the priority port, the system flow first meets the demand of the priority port, thereby ensuring that the steering system function of the working device is prioritized, and on the premise of ensuring the priority of the steering system function, the hydraulic oil flow of the traveling mechanism is given second priority, thereby ensuring the oil flow demand of the steering mechanism in the working device. Compared with the prior art, the advantages are: the steering mechanism and the traveling mechanism oil circuit are supplied with oil by the priority flow valve core, ensuring that the oil flow of the steering mechanism in the working device is given first priority, and the hydraulic oil flow of the traveling mechanism is given second priority. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic diagram of the overall structure of a diverter valve block of the present invention;

[0012] Figure 2 This is a schematic diagram of the overall structure of a diverter valve block of the present invention from another perspective;

[0013] Figure 3 The figure is a schematic diagram of the hydraulic principle of a diverter valve block of the present invention.

[0014] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0015] 1. Valve block body, 2. First priority flow valve, 3. Second priority flow valve, 4. Pressure collection component. DETAILED DESCRIPTION

[0016] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0017] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "center", "inside", "outside", "top", "bottom", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0018] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0019] like Figure 1-Figure 3 As shown, the present invention provides a diverter valve block, including a valve block body 1 and a priority flow valve core, wherein the priority flow valve core is arranged on the valve block body 1, the priority flow valve core is connected to the main pump oil circuit, the priority flow valve core is respectively connected to the steering mechanism and the traveling mechanism oil circuit, and the priority flow valve core supplies oil to the steering mechanism first. In this way, when the hydraulic system is working, the main pump supplies oil to each actuator, and since the priority flow valve core is respectively connected to the steering mechanism and the traveling mechanism oil circuit, the priority flow valve core supplies oil to the steering mechanism first, and the priority flow valve core ensures through flow control that no matter how the pressure of the non-priority port changes, as long as there is a demand at the priority port, the system flow first meets the demand of the priority port, thereby ensuring that the steering system function of the working device is prioritized, and on the premise of ensuring the priority of the steering system function, the hydraulic oil flow of the traveling mechanism is given second priority, thereby ensuring the oil flow demand of the steering mechanism in the working device. Compared with the prior art, the advantages are: the steering mechanism and the traveling mechanism oil circuit are supplied with oil by the priority flow valve core, ensuring that the oil flow of the steering mechanism in the working device is given first priority, and the hydraulic oil flow of the traveling mechanism is given second priority.

[0020] The diverter valve block of the present invention is as follows Figure 1-Figure 3As shown, on the basis of the technical solution described above, it can also be that: the priority flow valve core includes a first priority flow valve 2 and a second priority flow valve 3, the oil inlet of the first priority flow valve 2 is connected to the main pump oil circuit, the two oil outlets of the first priority flow valve 2 are respectively connected to the steering mechanism and the oil inlet of the second priority flow valve 3, and the two oil outlets of the second priority flow valve 3 are respectively connected to the shifting component and the lifting component of the walking mechanism. In this way, when the hydraulic system is working, the main pump supplies oil to the hydraulic system, and the hydraulic oil first passes through the oil inlet of the first priority flow valve 2 and enters the first priority flow valve 2. When the steering mechanism is working, the oil circuit from the first priority flow valve 2 to the second priority flow valve 3 is reduced or even closed, and the hydraulic oil is preferentially supplied to the steering mechanism to ensure the priority execution of the steering action; while ensuring the priority execution of the steering action, the remaining oil enters the second priority flow valve 3; when the steering action stops and the walking mechanism moves, the valve core position of the first priority flow valve 2 is switched, and the oil circuit to the steering mechanism is cut off, and the hydraulic oil flows from the first priority flow valve 2 to the second priority flow valve 3. The position switching of the valve core of the second priority flow valve 3 realizes the oil supply to the shifting action or the lifting mechanism to realize the mechanical action.

[0021] The diverter valve block of the present invention is as follows Figure 1-Figure 3As shown, on the basis of the technical solution described above, it can also be: a pressure collection component 4 is arranged on the valve block body 1 on the side opposite to the priority flow valve core position, and the pressure collection component 4 is connected to the main pump control oil circuit, and the pressure collection component 4 is used to collect the load pressure of each actuator in the hydraulic system. In this way, a pressure collection component 4 is arranged on the valve block body 1 on the side opposite to the priority flow valve core position, collects the size of each driving load pressure, and outputs the maximum value to the main pump for energy-saving control. A further preferred technical solution is: a detection oil port group is arranged on the valve block body 1, and the detection oil port group is connected to the oil circuit of the pressure collection component 4. In this way, when the hydraulic system is working, the hydraulic oil pressure of each working oil circuit is fed back to the pressure collection component 4 through the detection oil port group, and the pressure collection component 4 is used to compare the load size of each actuator, obtain the maximum value to control the main pump, and ensure that the main pump driving pressure is only greater than the maximum load of the system by a constant value ΔP, thereby realizing tractor energy-saving control. A further preferred technical solution is: the detection oil port group includes a system pressure collection port, a steering system pressure collection port, a shift pressure collection port, a lifting system pressure collection port, a maximum pressure collection port, a steering system feedback pressure collection port and a lifting system feedback pressure collection port. In this way, the system pressure collection port is used to collect the system pressure P, the steering system pressure collection port is used to collect the steering system pressure P1, the shift pressure collection port is used to collect the shift pressure P2, the lifting system pressure collection port is used to collect the lifting system pressure P3, the maximum pressure collection port is used to collect the maximum pressure X, the steering system feedback pressure collection port is used to collect the steering system feedback pressure X1, and the lifting system feedback pressure collection port is used to collect the lifting system feedback pressure X2, so as to realize the pressure collection of each actuator. The shift pressure collection port, the lifting system pressure collection port and the lifting system feedback pressure collection port are all arranged on the side surface of the valve block body 1 adjacent to the priority flow valve core, and the system pressure collection port, the steering system pressure collection port, the maximum pressure collection port and the steering system feedback pressure collection port are arranged on the side surface of the valve block body 1 adjacent to the priority flow valve core. In this way, the detection oil ports of each actuator in the detection oil port group are respectively arranged on the adjacent side surfaces of the valve block body 1 on the priority flow valve core, which facilitates the connection of the oil circuit and the wiring and installation of the hydraulic system.

[0022] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A diverter valve block, characterized in that: The invention comprises a valve block body (1) and a priority flow valve core, wherein the priority flow valve core is arranged on the side surface of the valve block body (1), the priority flow valve core is connected to the main pump oil circuit, the priority flow valve core is respectively connected to the steering mechanism and the walking mechanism oil circuit, and the priority flow valve core supplies oil to the steering mechanism in priority; the priority flow valve core comprises a first priority flow valve (2) and a second priority flow valve (3), the oil inlet of the first priority flow valve (2) is connected to the main pump oil circuit, the two oil outlets of the first priority flow valve (2) are respectively connected to the steering mechanism and the oil inlet of the second priority flow valve (3), and the two oil outlets of the second priority flow valve (3) are respectively connected to the shift component and the lifting component of the walking mechanism; A pressure collection component (4) is provided on the valve block body (1) on the side opposite to the priority flow valve core position, the pressure collection component (4) is connected to the main pump control oil circuit, and the pressure collection component (4) is used to collect the load pressure of each actuator in the hydraulic system; a detection oil port group is provided on the upper surface of the valve block body (1), and the detection oil port group is connected to the oil circuit of the pressure collection component (4); the hydraulic oil pressure of each working oil circuit is fed back to the pressure collection component (4) through the detection oil port group, and the pressure collection component (4) is used to compare the load size of each actuator, obtain the maximum value to control the main pump, and ensure that the main pump driving pressure is only greater than the maximum load of the system by a constant value ΔP, thereby realizing tractor energy-saving control.

2. The flow diverter valve block according to claim 1, characterized in that: The detection oil port group includes a system pressure collection port, a steering system pressure collection port, a shift pressure collection port, a lifting system pressure collection port, a maximum pressure collection port, a steering system feedback pressure collection port and a lifting system feedback pressure collection port. The system pressure collection port is used to collect the system pressure P, the steering system pressure collection port is used to collect the steering system pressure P1, the shift pressure collection port is used to collect the shift pressure P2, the lifting system pressure collection port is used to collect the lifting system pressure P3, the maximum pressure collection port is used to collect the maximum pressure X, the steering system feedback pressure collection port is used to collect the steering system feedback pressure X1, and the lifting system feedback pressure collection port is used to collect the lifting system feedback pressure X2.

3. The flow diverter valve block according to claim 2, characterized in that: The shift pressure collection port, the lifting system pressure collection port and the lifting system feedback pressure collection port are all arranged on the side surface of the valve block body (1) adjacent to the priority flow valve core.

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