CN211009393U - Multi-way valve, working hydraulic system and loader - Google Patents
Multi-way valve, working hydraulic system and loader Download PDFInfo
- Publication number
- CN211009393U CN211009393U CN201921566589.6U CN201921566589U CN211009393U CN 211009393 U CN211009393 U CN 211009393U CN 201921566589 U CN201921566589 U CN 201921566589U CN 211009393 U CN211009393 U CN 211009393U
- Authority
- CN
- China
- Prior art keywords
- valve
- way
- oil
- reversing valve
- hydraulic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Operation Control Of Excavators (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The utility model relates to a work hydraulic system, for solving the problem that the accessory allies oneself with pipeline pressure and other allies oneself with pipeline pressure mutual interference and be difficult to the regulation among the loader work hydraulic system, the utility model discloses construct a multiple unit valve and work hydraulic system and loader, wherein the oil feed end of each way switching-over valve all is connected with the multiple unit valve oil inlet in the multiple unit valve, the oil return end all is connected with the multiple unit valve oil return opening, two tee bend switching-over valve oil feed ends are connected with the multiple unit valve oil inlet among the accessory pressure adjusting device, and first overflow valve and second overflow valve are connected respectively between two tee bend switching-over valve first oil outlet and multiple unit valve oil return opening and between second oil outlet and multiple unit valve oil return opening, and two tee bend switching-over valve allies oneself with switching-over valve meso position and non-meso position linkage with the accessory. The utility model discloses in, two tee bend switching-over valve working position and accessory ally oneself with the meso position state and the non-meso position state of switching-over valve are related, realize accessory ally oneself with pipeline pressure and other allies oneself with pipeline pressure and independently adjust.
Description
Technical Field
The utility model relates to a loader work hydraulic system, more specifically say, relate to a multiple unit valve and work hydraulic system and loader.
Background
The loader has a variety of accessory devices, such as a holding fork, a side dumping device, a hoisting support, a sweeper and the like, different accessory devices have different required pipeline pressure flow rates, and the same accessory has different required pipeline pressure flow rates under different working conditions, for example, when the holding fork is used for clamping wood, the hardness of different wood materials is different, and in order to avoid clamping the wood due to overlarge holding force of the holding fork, the maximum pipeline pressure and the required flow rate of the holding fork need to be adjusted according to different wood materials, so that the maximum holding force and the clamping speed of the holding fork are limited.
Currently, the maximum line pressure of the loader adjusting attachment device causes the maximum line pressure of other working devices to change accordingly. The working hydraulic system with the accessory connection has larger throttling loss. In addition, because the pipeline pressures of the movable arm linkage, the rotating bucket linkage and the accessory linkage are all controlled by the same pressure regulating device, the maximum pipeline pressure of the movable arm oil cylinder and the rotating bucket oil cylinder can be adjusted to change along with the maximum pipeline pressure of the accessory device no matter the overflow valve or the plunger pump cut-off valve is adjusted, and therefore the operation capacities of lifting, shoveling and the like of the whole machine are changed. The hydraulic flow required by the accessory during working is not as large as that of the movable arm link, and the control fineness is affected when the hydraulic flow is connected with the movable arm link in series and shares one hydraulic flow.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is that the problem that the loader work hydraulic system attachment pipeline pressure and other link pipeline pressure mutual interference and be difficult to adjust among the loader, and provide a multiple unit valve and work hydraulic system and loader.
The utility model discloses a realize that the technical scheme of its purpose is like: the multi-way valve is provided with an oil inlet and an oil return port and comprises a multi-way reversing valve, wherein the multi-way reversing valve comprises at least one main control reversing valve and one attachment linkage reversing valve, each reversing valve is respectively provided with a working oil port used for being connected with a hydraulic execution piece, the oil inlet end of each reversing valve is connected with the oil inlet of the multi-way valve, and the oil return end of each reversing valve is connected with the oil return port of the multi-way valve; the oil inlet end of the two-position three-way reversing valve is connected with the oil inlet of the multi-way valve, the first overflow valve is connected between the first oil outlet end of the two-position three-way reversing valve and the oil return port of the multi-way valve, the second overflow valve is connected between the second oil outlet end of the two-position three-way reversing valve and the oil return port of the multi-way valve, and two working positions of the two-position three-way reversing valve are correspondingly linked with the middle position and the non-middle position of the accessory union reversing valve respectively. The utility model discloses in, the position of working of two tee bend switching-over valves is related to with the meso position state and the non-meso position state of accessory allies oneself with the switching-over valve, and then the oil inlet of multiple unit valve has different pressure when accessory allies oneself with the switching-over valve at meso position and non-meso position state, realizes that accessory allies oneself with pipeline pressure and other allies oneself with pipeline pressure and can not mutual interference.
Furthermore, the multi-way valve further comprises a shuttle valve, the two-position three-way reversing valve is a hydraulic control reversing valve, the accessory connecting reversing valve is a hydraulic control reversing valve, the oil outlet end of the shuttle valve is connected with the hydraulic control end of the two-position three-way reversing valve, and the two oil inlet ends of the shuttle valve are respectively connected with the pilot hydraulic control ends at the two ends of the accessory connecting reversing valve. Or the two-position three-way reversing valve is an electrically controlled electromagnetic reversing valve. The two-position three-way reversing valve is electrically controlled, and when the accessory linked reversing valve has reversing operation, the reversing valve control device directly outputs a control signal for controlling the two-position three-way reversing valve to realize corresponding control on reversing.
Further, in the multi-way valve, when the accessory associated reversing valve is in the neutral position, the oil inlet end of the two-position three-way reversing valve is communicated with the first oil outlet end, and when the accessory associated reversing valve is not in the neutral position, the oil inlet end of the two-position three-way reversing valve is communicated with the second oil outlet end. When the accessory linked reversing valve is in a neutral position, the maximum pressure of the oil inlet of the multi-way valve is controlled by the first overflow valve, and when the accessory linked reversing valve is in a non-neutral position, the maximum pressure of the oil inlet of the multi-way valve is controlled by the second overflow valve.
Further, in the multi-way valve, the second overflow valve is an overflow pressure adjustable overflow valve, so that the corresponding overflow pressure can be adjusted according to the connected accessory or the working condition, and the adjustment of the maximum working pressure of the accessory is realized.
The utility model discloses a realize that the technical scheme of its purpose is like: a working hydraulic system is constructed, and comprises a hydraulic oil tank, a hydraulic pump with an oil suction port connected with the hydraulic oil tank, a main hydraulic actuator, an accessory hydraulic actuator, a reversing valve control device and a hydraulic oil radiator; the hydraulic control system is characterized by further comprising the multi-way valve, an oil inlet of the multi-way valve is connected with a pump port of a hydraulic pump, an oil return port of the multi-way valve is connected with a hydraulic oil tank through a radiator, a main hydraulic actuator is connected with a working oil circuit of a main control reversing valve in the multi-way valve, an accessory hydraulic actuator is connected with a working oil port of an accessory linkage reversing valve in the multi-way valve, a main control linkage control output end in a reversing valve control device is correspondingly connected with a control end of the main control reversing valve in the multi-way valve in a control mode, and an accessory linkage control output end in the reversing valve control device is correspondingly connected with a control end of the accessory linkage reversing valve in the reversing. The utility model discloses in, if when the pilot control adopted full hydraulic pilot control, the switching-over valve controlling means comprises pilot valve, the operating handle who is connected with the pilot valve, connecting line, and accessory pressure adjusting device still includes the shuttle valve, and two tee bend switching-over valves are the pilot operated switching-over valve, the play oil end of shuttle valve with the pilot operated end of two tee bend switching-over valves is connected, the both ends oil feed end of shuttle valve is connected with the pilot operated oil mouth at accessory allies oneself with switching-over valve both ends respectively. If the pilot control adopts electro-hydraulic combined pilot control, namely the pilot valve is an electromagnetic valve and is controlled by the controller, the electric control handle sends an electric signal to the controller, the controller controls the pilot valve according to the electric signal of the electric control handle, at the moment, the two-position three-way reversing valve can be an electric control electromagnetic reversing valve, and when the controller outputs a control electric signal for connecting accessories in the reversing valve control device, the controller also outputs a control electric signal for controlling the two-position three-way reversing valve simultaneously so as to reverse the two-position three-way reversing valve.
In the working hydraulic system, the multi-way valve comprises a first main control reversing valve and a second main control reversing valve, and the main hydraulic actuator comprises a first hydraulic actuator connected with a working oil port of the first main control reversing valve and a second hydraulic actuator connected with a working oil port of the second main control reversing valve.
The utility model discloses a realize that the technical scheme of its purpose is like: a loader is constructed, and the loader is characterized by comprising the working hydraulic system, wherein the first hydraulic executing part is a movable arm oil cylinder, and the second hydraulic executing part is a rotating bucket oil cylinder.
Compared with the prior art, the utility model discloses the operating pressure that can realize the accessory and other allies oneself with adjusts alone, protects noninterference. Compare in setting up large-traffic proportion relief pressure valve on the main oil pipe of accessory pipeline, the technical scheme simple structure of the utility model provides a throttling loss that hydraulic system produced is very little for hydraulic system calorific capacity, noise are also littleer.
Drawings
Fig. 1 is a schematic diagram of a working hydraulic system of the loader of the present invention.
Part names and serial numbers in the figure:
the hydraulic control system comprises a movable arm oil cylinder 1, a rotating bucket oil cylinder 2, an accessory oil cylinder 3, a multi-way valve 4, a movable arm linkage main control reversing valve 41, a rotating bucket linkage main control reversing valve 42, an accessory linkage reversing valve 43, a two-position three-way reversing valve 5, a first overflow valve 6, a second overflow valve 7, a hydraulic pump 8, a radiator 9 and a shuttle valve 10.
Detailed Description
The following description of the embodiments refers to the accompanying drawings.
The working hydraulic system shown in fig. 1 is a loader working hydraulic system, and mainly includes a hydraulic oil tank, a hydraulic pump 8 with an oil suction port connected to the hydraulic oil tank, a main hydraulic actuator, an accessory hydraulic actuator, a directional valve control device, a hydraulic oil radiator 9, a multi-way valve 4, and the like. The pump port of the hydraulic pump 8 is connected with the oil inlet of the multi-way valve, and the oil return port of the multi-way valve is also connected with a hydraulic oil tank through a hydraulic oil radiator 9.
In this implementation, the multi-way valve 4 has an oil inlet P and an oil return port T and includes a multi-way directional valve, the multi-way directional valve includes a boom linkage main control directional valve 41, a bucket linkage main control directional valve 42, an accessory linkage directional valve 43, and an accessory pressure adjusting device, each of the multi-way directional valves has a working oil port for connecting with a hydraulic actuator, a pilot oil port for connecting with the directional valve control device, an oil inlet end of each of the multi-way directional valves is connected with an oil inlet of the multi-way valve, an oil return end of each of the multi-way directional valves is connected with an oil return port of the multi-way valve, and the accessory pressure adjusting device includes a two-position three-way directional valve 5, a first overflow valve 6, a second overflow valve 7, and a; the oil inlet end of the two-position three-way reversing valve 5 is connected with an oil inlet P of the multi-way valve, the first overflow valve 6 is connected between the first oil outlet end of the two-position three-way reversing valve 5 and an oil return port T of the multi-way valve, the second overflow valve 7 is connected between the second oil outlet end of the two-position three-way reversing valve 5 and the oil return port T of the multi-way valve, the two-position three-way reversing valve 5 is a hydraulic control reversing valve, the hydraulic control end of the hydraulic control reversing valve is connected with the oil outlet end of the shuttle valve 10, and the two oil inlet ends of the shuttle valve 10 are respectively connected with pilot oil. The second relief valve 7 is a relief pressure-adjustable relief valve. The corresponding relief pressure can be set according to the working pressure requirement or the working condition requirement of the connected accessory.
The main hydraulic actuator comprises a movable arm oil cylinder 1 and a rotary bucket oil cylinder 2, wherein the movable arm oil cylinder 1 is connected with working oil ports A2 and B2 of a movable arm linkage main control reversing valve through pipelines, and the rotary bucket oil cylinder 2 is connected with working oil ports A1 and B1 of the rotary bucket linkage main control reversing valve through pipelines. The accessory hydraulic actuator is an accessory oil cylinder 3 which is connected with working oil ports A3 and B3 of an accessory joint reversing valve through pipelines.
In this embodiment, the directional control valve control device (not shown) is a full hydraulic pilot control device, which includes a pilot valve whose valve port opening is controlled by a control handle, and includes a boom linkage pilot valve, a bucket linkage pilot valve, and an accessory linkage pilot valve, wherein the oil inlet end of each pilot valve is connected to a pilot oil source, such as a pilot oil pump, the oil return port of each pilot valve is connected to a hydraulic oil tank, the two control output ends of the boom linkage pilot valve are respectively connected to pilot hydraulic control ends a2 and b2 at the two ends of the boom linkage main control directional control valve, the two control output ends of the bucket linkage pilot valve are respectively connected to pilot hydraulic control ends a1 and b1 at the two ends of the bucket linkage main control directional control valve, the two control output ends of the accessory linkage pilot valve are respectively connected to pilot hydraulic control ends a3 and b3 at the two ends of the data linkage main control directional control valve, and the two control output ends of.
In this embodiment, when the accessory linkage does not need to be operated, the accessory linkage pilot valve does not output a pilot pressure signal, the accessory linkage reversing valve 43 is in a middle position, the two-position three-way reversing valve 5 is in an upper position under the action of spring force, and at this time, the system pressure is determined by the first overflow valve 6. When the accessory linkage needs to act, the accessory linkage pilot handle can displace, pilot control oil output by the accessory linkage pilot valve can control the accessory linkage reversing valve 43 to move (the accessory linkage reversing valve is in a non-neutral state), and meanwhile, the pilot control oil can act on a non-spring cavity (a hydraulic control end) of the two-position three-way reversing valve 5 to enable the two-position three-way reversing valve 5 to work in a lower position, and the system pressure at the moment is determined by the second overflow valve.
In this embodiment, the reversing valve control device is in a full hydraulic pilot control mode, and in specific implementation, the reversing valve control device may also be in a pilot control mode combining oil and electricity or in a full electric control mode. In the oil-electricity combined pilot control mode, the pilot valve is an electromagnetic valve connected with the controller, and the controller outputs a control electric signal for controlling the pilot valve according to an operation signal of the electric control handle. In the full electric control mode, each path of reversing valve in the multi-path valve is an electromagnetic valve, and the controller directly outputs control electric signals for controlling each path of reversing valve according to the operation signals of the electric control handle. In a hydraulic system with a pilot control mode of oil-electricity combination or a full electric control mode, a two-position three-way reversing valve in an accessory pressure adjusting device can be an electromagnetic valve with a control end connected with a controller, at the moment, a shuttle valve in the accessory pressure adjusting device can be omitted, and the controller directly controls the working position of the two-position three-way reversing valve according to whether an accessory-connected electric control handle has an action operation signal or not.
Claims (8)
1. A multi-way valve is provided with an oil inlet and an oil return port and comprises a multi-way reversing valve, wherein the multi-way reversing valve comprises at least one main control reversing valve and an attachment linkage reversing valve, each multi-way reversing valve is respectively provided with a working oil port used for being connected with a hydraulic execution part, the oil inlet end of each multi-way reversing valve is connected with the oil inlet of the multi-way valve, and the oil return end of each multi-way reversing valve is connected with the oil return port of the multi-way valve; the oil inlet end of the two-position three-way reversing valve is connected with the oil inlet of the multi-way valve, the first overflow valve is connected between the first oil outlet end of the two-position three-way reversing valve and the oil return port of the multi-way valve, the second overflow valve is connected between the second oil outlet end of the two-position three-way reversing valve and the oil return port of the multi-way valve, and two working positions of the two-position three-way reversing valve are correspondingly linked with the middle position and the non-middle position of the accessory union reversing valve respectively.
2. The multi-way valve according to claim 1, further comprising a shuttle valve, wherein the two-position three-way reversing valve is a hydraulic control reversing valve, the accessory connecting reversing valve is a hydraulic control reversing valve, the oil outlet end of the shuttle valve is connected with the hydraulic control end of the two-position three-way reversing valve, and the two oil inlet ends of the shuttle valve are respectively connected with the pilot hydraulic control ends at the two ends of the accessory connecting reversing valve.
3. The multi-way valve according to claim 1, characterized in that the two-position three-way directional valve is an electrically controlled electromagnetic directional valve.
4. The multi-way valve according to any one of claims 1 to 3, wherein the oil inlet end of the two-position three-way directional valve is communicated with the first oil outlet end when the accessory linked directional valve is in the neutral position, and the oil inlet end of the two-position three-way directional valve is communicated with the second oil outlet end when the accessory linked directional valve is not in the neutral position.
5. The multiplex valve of claim 4 wherein said second spill valve is a spill pressure adjustable spill valve.
6. A working hydraulic system comprises a hydraulic oil tank, a hydraulic pump with an oil suction port connected with the hydraulic oil tank, a main hydraulic actuator, an accessory hydraulic actuator, a reversing valve control device and a hydraulic oil radiator; the multi-way valve is characterized by further comprising the multi-way valve in any one of claims 1 to 5, wherein an oil inlet of the multi-way valve is connected with a pump port of a hydraulic pump, an oil return port of the multi-way valve is connected with a hydraulic oil tank through a radiator, a main hydraulic actuator is connected with a working oil circuit of a main control reversing valve in the multi-way valve, an accessory hydraulic actuator is connected with a working oil port of an accessory linkage reversing valve in the multi-way valve, a main control linkage control output end in a reversing valve control device is correspondingly in control connection with a control end of the main control reversing valve in the multi-way valve, and an accessory linkage control output end in the reversing valve control device is correspondingly connected with a control end of the accessory linkage reversing valve in the multi-.
7. The working hydraulic system according to claim 6, wherein the multi-way valve comprises a first main control reversing valve and a second main control reversing valve, and the main hydraulic actuator comprises a first hydraulic actuator connected with a working oil port of the first main control reversing valve and a second hydraulic actuator connected with a working oil port of the second main control reversing valve.
8. A loader characterized by comprising the working hydraulic system according to claim 7, wherein the first hydraulic actuator is a boom cylinder, and the second hydraulic actuator is a bucket cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921566589.6U CN211009393U (en) | 2019-09-20 | 2019-09-20 | Multi-way valve, working hydraulic system and loader |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921566589.6U CN211009393U (en) | 2019-09-20 | 2019-09-20 | Multi-way valve, working hydraulic system and loader |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211009393U true CN211009393U (en) | 2020-07-14 |
Family
ID=71507047
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921566589.6U Active CN211009393U (en) | 2019-09-20 | 2019-09-20 | Multi-way valve, working hydraulic system and loader |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211009393U (en) |
-
2019
- 2019-09-20 CN CN201921566589.6U patent/CN211009393U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP3550260B2 (en) | Actuator operating characteristic control device | |
| KR910009283B1 (en) | Construction machine dual-dump hydraulic circuit with piloted arm-boom cylinder supply priority switching valves | |
| US7513109B2 (en) | Hydraulic controller for working machine | |
| JP2021032316A (en) | Hydraulic system of construction machine | |
| WO2017164175A1 (en) | Excavator and control valve for excavator | |
| WO2020188920A1 (en) | Hydraulic shovel | |
| CN105612359A (en) | Hydraulic drive unit | |
| CN113494111B (en) | Main control valve, fixed variable hydraulic system and loader | |
| CN112682380B (en) | Quick-change hydraulic system | |
| CN211009393U (en) | Multi-way valve, working hydraulic system and loader | |
| JP3545626B2 (en) | Hydraulic oil supply control device | |
| US20220275605A1 (en) | Hydraulic control system | |
| JP4121466B2 (en) | Hydraulic circuit of hydraulic working machine | |
| US5540050A (en) | Hydraulic system providing a positive actuator force | |
| US20160017901A1 (en) | Pressure loss reducing circuit for a works machine | |
| WO2017164169A1 (en) | Shovel and control valve for shovel | |
| WO2008044094A1 (en) | Construction equipment machine with hydraulic pressure controlled selecting system | |
| CN211778288U (en) | Distribution valve for loader | |
| JP3149974B2 (en) | Hydraulic circuit of excavator | |
| JPH01250531A (en) | Oil-pressure control circuit for working machine | |
| JP2012052583A (en) | Hydraulic working machine | |
| JP3961123B2 (en) | Hydraulic circuit of hydraulic work machine | |
| CN217759049U (en) | Pilot signal valve group, full-variable hydraulic system and loader | |
| CN219827360U (en) | Sweeper hydraulic system for loader and sweeper | |
| CN211447061U (en) | Hydraulic system and double-section movable arm excavator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |