CN218266562U - Double-cylinder control hydraulic circuit - Google Patents
Double-cylinder control hydraulic circuit Download PDFInfo
- Publication number
- CN218266562U CN218266562U CN202222295106.1U CN202222295106U CN218266562U CN 218266562 U CN218266562 U CN 218266562U CN 202222295106 U CN202222295106 U CN 202222295106U CN 218266562 U CN218266562 U CN 218266562U
- Authority
- CN
- China
- Prior art keywords
- valve
- port
- way
- oil
- control
- 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
- Fluid-Pressure Circuits (AREA)
Abstract
A two-cylinder control hydraulic circuit comprising: the hydraulic control system comprises a first hydraulic cylinder, a second hydraulic cylinder, a first two-way logic valve, a second two-way logic valve and an electromagnetic directional valve, wherein a first connecting port of the first two-way logic valve is connected with a hydraulic oil inlet, and a second connecting port of the first two-way logic valve is connected with a first rodless cavity of the first hydraulic cylinder; a third connecting port of the second two-way logic valve is connected with a hydraulic oil inlet, and a fourth connecting port of the second two-way logic valve is connected with a second rodless cavity of a second hydraulic cylinder; an oil inlet of the electromagnetic reversing valve is connected with a hydraulic oil inlet, an oil return port of the electromagnetic reversing valve is connected with an oil tank, a first working port of the electromagnetic reversing valve is connected with a first control port, a second working port of the electromagnetic reversing valve is connected with a second control port of the electromagnetic reversing valve, and the electromagnetic reversing valve is used for controlling the opening and closing of a first two-way logic valve and a second two-way logic valve. The utility model provides a double-cylinder control hydraulic circuit, control logic is simple, compact structure, and convenient operation can satisfy the different operating mode demands of double-cylinder.
Description
Technical Field
The utility model relates to a hydraulic control field especially relates to a double-cylinder control hydraulic circuit.
Background
With the progress of science and technology, engineering equipment adopting hydraulic technology tends to be large-scale and developed, the working conditions of the equipment are more and more complex, and if a plurality of execution elements are arranged in a hydraulic system, the execution elements need to be combined under different working conditions to realize a plurality of working procedures so as to meet the preset action requirements.
Therefore, a double-cylinder control hydraulic circuit is needed to be provided, and the functions of synchronous and parallel connection of two executing elements and independent work of the two executing elements can be realized.
SUMMERY OF THE UTILITY MODEL
The technical problem solved by the utility model is to provide a double-cylinder control hydraulic circuit can realize two executive component different work condition such as synchronous, parallelly connected, independent work separately.
In order to solve the above technical problem, an embodiment of the utility model provides a double-cylinder control hydraulic circuit, include: a first hydraulic cylinder including a first rod chamber and a first rodless chamber; a second hydraulic cylinder comprising a second rod cavity and a second rodless cavity; the first two-way logic valve comprises a first control port, a first connecting port and a second connecting port, the first connecting port is connected with a hydraulic oil inlet, and the second connecting port is connected with the first rodless cavity; the second two-way logic valve comprises a second control port, a third connecting port and a fourth connecting port, the third connecting port is connected with a hydraulic oil inlet, and the fourth connecting port is connected with the second rodless cavity; the electromagnetic reversing valve comprises an oil inlet, an oil return port, a first working port and a second working port, the oil inlet is connected with a hydraulic oil inlet, the oil return port is connected with an oil tank, the first working port is connected with the first control port, the second working port is connected with the second control port, and the electromagnetic reversing valve is used for controlling the opening and closing of the first two-way logic valve and the second two-way logic valve.
Optionally, the electromagnetic directional valve is a three-position four-way directional valve.
Optionally, the electromagnetic directional valve includes a first working position, a second working position and a static position, the first working position is configured such that the oil inlet is communicated with the first working port, and the oil return port is communicated with the second working port; the second working position is configured in such a way that the oil inlet is communicated with the second working port, and the oil return port is communicated with the first working port; the static position is configured to close the oil inlet, and the oil return port is communicated with the first working port and the second working port.
Optionally, the method further includes: the inlet of the flow distributing and collecting valve is connected with the hydraulic oil inlet, the first outlet of the flow distributing and collecting valve is connected with the first connecting port of the first two-way logic valve, and the second outlet of the flow distributing and collecting valve is connected with the third connecting port of the second two-way logic valve.
Optionally, the flow distributing and collecting valve is an equal-flow type flow distributing and collecting valve.
Optionally, the method further includes: the third two-way logic valve, the third two-way logic valve is located the first connecting port of first two-way logic valve with on the connection oil circuit of the third connector of second two-way logic valve, the third two-way logic valve includes third control port, fifth connector and sixth connector, the first export of flow distribution and collection valve still with fifth connector and third control port are connected, the second export of flow distribution and collection valve still with sixth connector and third control port are connected.
Optionally, the third control port is further connected to the oil tank.
Optionally, the method further includes: and the electromagnetic ball valve is positioned on the oil path connecting the third control port with the oil tank and is used for controlling the on-off of the oil path from the third control port to the oil tank.
Optionally, the method further includes: the first check valve comprises a first check valve inlet and a first check valve outlet, the first check valve inlet is connected with the first outlet of the flow distributing and collecting valve, and the first check valve outlet is connected with the oil inlet and the third control port; and the second one-way valve comprises a second one-way valve inlet and a second one-way valve outlet, the second one-way valve inlet is connected with the second outlet of the flow dividing and collecting valve, and the second one-way valve outlet is connected with the oil inlet and the third control port.
Optionally, the method further includes: and one end of the damping plug is connected with the outlet of the first one-way valve and the outlet of the second one-way valve, and the other end of the damping plug is connected with the third control port.
Compared with the prior art, the utility model discloses technical scheme has following beneficial effect:
according to the double-cylinder control hydraulic circuit provided by the technical scheme, the opening and closing of the first two-way logic valve and the second two-way logic valve are controlled through the electromagnetic directional valve, and when the first two-way logic valve and the second two-way logic valve are both opened, the first hydraulic cylinder and the second hydraulic cylinder can work simultaneously; when the first two-way logic valve is opened and the second two-way logic valve is closed, the first hydraulic cylinder works independently; when the second two-way logic valve is opened and the first two-way logic valve is closed, the second hydraulic cylinder works independently. The hydraulic circuit has simple control logic, compact structure and high integration, and can meet different working condition requirements of simultaneous working or independent working of two execution elements.
Further, the method also comprises the following steps: flow distribution and collection valve, flow distribution and collection valve's import with the hydraulic oil entry is connected, flow distribution and collection valve's first export with the first connector connection of first two-way logic valve, flow distribution and collection valve's second export with the third connector connection of second two-way logic valve. The speed synchronization of the first hydraulic cylinder and the second hydraulic cylinder can be realized by adopting the flow dividing and collecting valve, and oil liquid at a hydraulic oil inlet is not influenced by the load pressure change of the first hydraulic cylinder and the second hydraulic cylinder and respectively enters the first rodless cavity and the second rodless cavity at the same flow.
Further, the method also comprises the following steps: the third two-way logic valve, the third two-way logic valve is located the first connecting port of first two-way logic valve with on the connection oil circuit of the third connector of second two-way logic valve, the third two-way logic valve includes third control port, fifth connector and sixth connector, the first export of flow distribution and collection valve still with fifth connector and third control port are connected, the second export of flow distribution and collection valve still with sixth connector and third control port are connected. The opening and closing of the third two-way logic valve can be used for realizing different working conditions of synchronous work or parallel work of the first hydraulic cylinder and the second hydraulic cylinder, when the third two-way logic valve is closed, oil at a hydraulic oil inlet respectively enters the first hydraulic cylinder and the second hydraulic cylinder through the flow dividing and collecting valve, and the speeds of the two executing elements are synchronous; when the third two-way logic valve is opened, the hydraulic cylinders can move asynchronously according to different loads of the two hydraulic cylinders, and the working condition that the two execution elements are connected in parallel is realized.
Drawings
Fig. 1 is a schematic circuit diagram of a double-cylinder control hydraulic circuit according to an embodiment of the present invention.
Detailed Description
As described in the background art, in some large or complex engineering equipment, a single actuator cannot meet the operating condition requirements, and a hydraulic system needs to have multiple actuators, which need to realize multiple working procedures under different operating condition combinations to complete the predetermined action requirements.
In order to solve the problem, the embodiment of the utility model provides a double-cylinder control hydraulic circuit, through the combination of a plurality of two-way logic valves and solenoid directional valve, utilize the switching of the first two-way logic valve of solenoid directional valve control and second two-way logic valve, satisfy the different operating mode demands of first pneumatic cylinder and second pneumatic cylinder simultaneous working or autonomous working, control logic is simple, compact structure, and convenient operation is favorable to improving work efficiency, and can avoid hydraulic circuit to take place fluid and leak.
In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings.
Fig. 1 is a schematic circuit diagram of a two-cylinder control hydraulic circuit according to an embodiment of the present invention.
Referring to fig. 1, the two-cylinder control hydraulic circuit 10 includes:
a first hydraulic cylinder 11, said first hydraulic cylinder 11 comprising a first rod chamber 111 and a first rodless chamber 112;
a second hydraulic cylinder 12, the second hydraulic cylinder 12 including a second rod chamber 121 and a second rodless chamber 122;
a first two-way logic valve 13, wherein the first two-way logic valve 13 comprises a first control port 131, a first connecting port 132 and a second connecting port 133, the first connecting port 132 is connected with a hydraulic oil inlet A, and the second connecting port 133 is connected with the first rodless cavity 112 through a port A1;
a second two-way logic valve 14, wherein the second two-way logic valve 14 includes a second control port 141, a third connection port 142, and a fourth connection port 143, the third connection port 142 is connected to the hydraulic oil inlet a, and the fourth connection port 143 is connected to the second rodless cavity 122 through A2 port;
the hydraulic control system comprises an electromagnetic directional valve 15, wherein the electromagnetic directional valve 15 comprises an oil inlet P, an oil return port T, a first working port M and a second working port N, the oil inlet P is connected with a hydraulic oil inlet A, the oil return port T is connected with an oil tank, the first working port M is connected with a first control port 131, the second working port N is connected with a second control port 141, and the electromagnetic directional valve 15 is used for controlling opening and closing of a first two-way logic valve 13 and a second two-way logic valve 14.
In this embodiment, the first rod chamber 111 is connected to the hydraulic oil outlet B through a port B1, and the second rod chamber 121 is connected to the hydraulic oil outlet B through a port B2.
In this embodiment, the electromagnetic directional valve 15 is a three-position four-way directional valve, the electromagnetic directional valve 15 includes a first working position, a second working position and a static position, the first working position is configured such that the oil inlet P is communicated with the first working port M, and the oil return port T is communicated with the second working port N; the second working position is configured in such a way that the oil inlet P is communicated with the second working port N, and the oil return port T is communicated with the first working port M; the static position is configured to close the oil inlet P, and the oil return port T is communicated with the first working port M and the second working port N.
When the electromagnetic directional valve 15 is at the static position, there is no pressure oil at the first control port 131 and the second control port 132, the oil enters the first two-way logic valve 13 and the second two-way logic valve 14 through the first connection port 132 and the third connection port 142 from the hydraulic oil inlet a, and after the first two-way logic valve 13 and the second two-way logic valve 14 are opened, the oil enters the first rod-less cavity 112 and the second rod-less cavity 122, and the first hydraulic cylinder 11 and the second hydraulic cylinder 12 can work simultaneously.
When the electromagnetic directional valve 15 is at the first working position, the oil inlet P is communicated with the first working port M, the oil return port T is communicated with the second working port N, oil reaches the first control port 131 through the hydraulic oil inlet a, the oil inlet P and the first working port M, the first two-way logic valve 13 is closed, and the oil cannot enter the first hydraulic cylinder 11 through the first two-way logic valve 13, so that the first hydraulic cylinder 11 stops working; meanwhile, the pressure oil at the second control port 141 of the second two-way logic valve 14 is released through the oil return port T, the pressure oil enters the second hydraulic cylinder 12 by opening the second two-way logic valve 14, and the second hydraulic cylinder 12 operates independently.
Similarly, when the electromagnetic directional valve 15 is located at the second working position, the first two-way logic valve 13 is opened, the second two-way logic valve 14 is closed, and the first hydraulic cylinder 11 works independently, which is not described herein again.
In the embodiment, the main valve adopts the plug-in cone valve, so that the resistance loss is small, the flow capacity is high, the sealing performance is good, the oil leakage is reduced, the action response is fast, the structure is simple, and the maintenance is convenient.
With continued reference to fig. 1, the two-cylinder control hydraulic circuit 10 further includes: and an inlet 161 of the flow distribution and collection valve 16 is connected with the hydraulic oil inlet A, a first outlet 162 of the flow distribution and collection valve 16 is connected with the first connecting port 132 of the first two-way logic valve 13, and a second outlet of the flow distribution and collection valve 16 is connected with the third connecting port 142 of the second two-way logic valve 14.
In this embodiment, the combining flow valve 16 is an equal-flow combining flow valve, and by setting the combining flow valve 16, no matter how the load pressures of the first hydraulic cylinder 11 and the second hydraulic cylinder 12 change, the oil liquid respectively enters the first rodless cavity 112 and the second rodless cavity 122 through the ports A1 and A2 at equal flows, so that the speed synchronization of the first hydraulic cylinder 11 and the second hydraulic cylinder 12 is realized.
With continued reference to fig. 1, the two-cylinder control hydraulic circuit 10 further includes: a third two-way logic valve 17, the third two-way logic valve 17 is located on the first connection port 132 of the first two-way logic valve 13 and the connection oil path of the third connection port 142 of the second two-way logic valve 14, the third two-way logic valve 17 includes a third control port 171, a fifth connection port 172 and a sixth connection port 173, the first outlet 162 of the flow dividing and combining valve 16 is further connected with the fifth connection port 172 and the third connection port 171, and the second outlet 163 of the flow dividing and combining valve 16 is further connected with the sixth connection port 173 and the third connection port 171.
In this embodiment, the third two-way logic valve 17 is located on a connection oil path between the first two-way logic valve 13 and the second two-way logic valve 14, and the opening and closing of the third two-way logic valve 17 can control the opening and closing of the connection oil path between the first two-way logic valve 13 and the second two-way logic valve 14. When the third two-way logic valve 17 is closed, oil at the hydraulic oil inlet a respectively enters the first hydraulic cylinder 11 and the second hydraulic cylinder 12 through the flow dividing and collecting valve 16 at equal flow, so that the speed synchronization of the two execution elements is realized; when the third two-way logic valve 17 is opened, the oil flowing out of the first outlet 162 of the flow dividing and combining valve 16 can also flow to the second two-way logic valve 14 through the third two-way logic valve 17, and the oil flowing out of the second outlet 163 of the flow dividing and combining valve 16 can also flow to the first two-way logic valve 13 through the third two-way logic valve 17, at this time, if the first two-way logic valve 13 and the second two-way logic valve 14 are both opened, the output flow at the hydraulic oil inlet a firstly enters an actuator with the smallest sum of pressure loss on a pipeline, resistance loss in various control valves and working pressure for driving an external load, so that the actuator moves firstly.
In this embodiment, the third control port 171 of the third two-way logic valve 17 is also connected to the tank.
With continued reference to fig. 1, further comprising: and the electromagnetic ball valve 18 is positioned on an oil path connecting the third control port 171 and the oil tank, and the electromagnetic ball valve 18 is used for controlling the on-off of the oil path from the third control port 171 to the oil tank.
In this embodiment, when the electromagnetic ball valve 18 is not powered, the oil tank is connected to the third control port 171 in a one-way manner, oil pressure exists at the third control port 171, and the third two-way logic valve 17 is in a closed state, so that a speed synchronization working condition of the first hydraulic cylinder 11 and the second hydraulic cylinder 12 is realized; when the electromagnetic ball valve 18 is powered on, the electromagnetic ball valve 18 can be conducted reversely, that is, the oil path from the third control port 171 to the oil tank is conducted, the pressure of the third control port 171 is released, and the third two-way logic valve is opened, so that the oil path from the first two-way logic valve 13 to the second two-way logic valve 14 is conducted, and the parallel working condition of the first hydraulic cylinder 11 and the second hydraulic cylinder 12 is realized.
In the embodiment, the electromagnetic ball valve 18 is adopted, so that the sealing performance is good, the use pressure is high, the reaction is sensitive, the response speed is high, the adaptability to working media is strong, and the anti-pollution performance is excellent.
With continuing reference to fig. 1, further comprising: a first check valve 19 and a second check valve 20, wherein a first check valve inlet of the first check valve 19 is connected with the first outlet 162 of the flow distributing and collecting valve 16, and a first check valve outlet is connected with the oil inlet P and the third control port 171; a second check valve inlet of the second check valve 20 is connected to the second outlet 163 of the flow dividing and combining valve 16, and a second check valve outlet is connected to the oil inlet P and the third control port 171.
In this embodiment, the method further includes: and one end of the damping plug 21 is connected with the first check valve outlet and the second check valve outlet, and the other end of the damping plug 21 is connected with the third control port 171.
In this embodiment, the damping plug 21 is provided to generate a motion resistance on the oil passage leading to the third control port 171 of the third two-way logic valve 17, so that the closing of the third two-way logic valve 17 is made softer.
In this embodiment, part of the oil enters the third control port 171 through the first outlet 162, the first check valve 19 and the damping plug 21, and part of the oil enters the third control port 171 through the second outlet 163, the second check valve 20 and the damping plug 21. When the electromagnetic ball valve 18 is not powered, the pressure of the third control port 171 cannot be released, so that the third two-way logic valve 17 is closed; when the electromagnetic ball valve 18 is energized, the pressure of the third control port 171 is released to the tank, so that the third two-way logic valve 17 can be opened.
The embodiment of the utility model provides a double-cylinder control hydraulic circuit uses through the combination of reposition of redundant personnel collecting valve, a plurality of two-way logic valve, magenetic exchange valve and ball-solenoid valve, can realize the use of first pneumatic cylinder and second pneumatic cylinder under different work condition.
When the electromagnetic directional valve 15 is in a static position and the electromagnetic ball valve 18 is not electrified, the first two-way logic valve 13 and the second two-way logic valve 14 are opened, the third two-way logic valve 17 is closed, and oil enters the first hydraulic cylinder 11 and the second hydraulic cylinder 12 through the flow dividing and collecting valve 16 at equal flow, so that double-cylinder synchronous motion is realized;
when the electromagnetic directional valve 15 is in a static position and the electromagnetic ball valve 18 is electrified, the first two-way logic valve 13, the second two-way logic valve 14 and the third two-way logic valve 17 can be opened, the two hydraulic cylinders work in parallel, and at the moment, the output flow at the hydraulic oil inlet A firstly enters an execution element with the smallest sum of pressure loss on a pipeline, resistance loss in various control valves and working pressure for driving external loads, so that the execution element moves firstly;
when the electromagnetic directional valve 15 is in the first working position and the electromagnetic ball valve 18 is electrified, the first two-way logic valve 13 is closed, the second two-way logic valve 14 and the third two-way logic valve 17 can be opened, and pressure oil completely enters the port A2, so that the second hydraulic cylinder 12 works independently;
when the electromagnetic directional valve 15 is in the second working position and the electromagnetic ball valve 18 is powered on, the second two-way logic valve 14 is closed, the first two-way logic valve 13 and the third two-way logic valve 17 can be opened, pressure oil completely enters the port A1, and at the moment, the first hydraulic cylinder 12 works independently.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one of ordinary skill in the pertinent art without departing from the scope or spirit of the present invention, and the scope of the present invention is defined by the appended claims.
Claims (10)
1. A dual cylinder control hydraulic circuit, comprising:
a first hydraulic cylinder including a first rod chamber and a first rodless chamber;
a second hydraulic cylinder including a second rod cavity and a second rodless cavity;
the first two-way logic valve comprises a first control port, a first connecting port and a second connecting port, the first connecting port is connected with a hydraulic oil inlet, and the second connecting port is connected with the first rodless cavity;
the second two-way logic valve comprises a second control port, a third connecting port and a fourth connecting port, the third connecting port is connected with a hydraulic oil inlet, and the fourth connecting port is connected with the second rodless cavity;
the electromagnetic directional valve comprises an oil inlet, an oil return port, a first working port and a second working port, the oil inlet is connected with a hydraulic oil inlet, the oil return port is connected with an oil tank, the first working port is connected with the first control port, the second working port is connected with the second control port, and the electromagnetic directional valve is used for controlling the opening and closing of the first two-way logic valve and the second two-way logic valve.
2. The dual cylinder control hydraulic circuit of claim 1, wherein the solenoid directional valve is a three-position, four-way directional valve.
3. The dual-cylinder control hydraulic circuit of claim 2, wherein the solenoid directional valve includes a first operating position, a second operating position, and a rest position, the first operating position being configured such that the oil inlet is in communication with the first operating port and the oil return port is in communication with the second operating port; the second working position is configured in such a way that the oil inlet is communicated with the second working port, and the oil return port is communicated with the first working port; the static position configuration is that the oil inlet is closed, and the oil return opening is communicated with the first working opening and the second working opening.
4. The dual cylinder control hydraulic circuit of claim 1, further comprising: the inlet of the flow distributing and collecting valve is connected with the hydraulic oil inlet, the first outlet of the flow distributing and collecting valve is connected with the first connecting port of the first two-way logic valve, and the second outlet of the flow distributing and collecting valve is connected with the third connecting port of the second two-way logic valve.
5. The dual cylinder controlled hydraulic circuit of claim 4, wherein the flow combining valve is an equal flow combining valve.
6. The dual cylinder control hydraulic circuit of claim 4, further comprising: the third two-way logic valve, the third two-way logic valve is located the first connecting port of first two-way logic valve with on the connection oil circuit of the third connector of second two-way logic valve, the third two-way logic valve includes third control port, fifth connector and sixth connector, the first export of flow distribution and collection valve still with fifth connector and third control port are connected, the second export of flow distribution and collection valve still with sixth connector and third control port are connected.
7. The dual cylinder control hydraulic circuit of claim 6, wherein the third control port is further connected to the tank.
8. The dual cylinder control hydraulic circuit of claim 7, further comprising: and the electromagnetic ball valve is positioned on the oil path connecting the third control port with the oil tank and is used for controlling the on-off of the oil path from the third control port to the oil tank.
9. The dual cylinder control hydraulic circuit of claim 6, further comprising:
the first check valve comprises a first check valve inlet and a first check valve outlet, the first check valve inlet is connected with the first outlet of the flow dividing and collecting valve, and the first check valve outlet is connected with the oil inlet and the third control port;
and the second one-way valve comprises a second one-way valve inlet and a second one-way valve outlet, the second one-way valve inlet is connected with the second outlet of the flow dividing and collecting valve, and the second one-way valve outlet is connected with the oil inlet and the third control port.
10. The dual cylinder control hydraulic circuit of claim 9, further comprising: and one end of the damping plug is connected with the outlet of the first one-way valve and the outlet of the second one-way valve, and the other end of the damping plug is connected with the third control port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222295106.1U CN218266562U (en) | 2022-08-30 | 2022-08-30 | Double-cylinder control hydraulic circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222295106.1U CN218266562U (en) | 2022-08-30 | 2022-08-30 | Double-cylinder control hydraulic circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218266562U true CN218266562U (en) | 2023-01-10 |
Family
ID=84710146
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222295106.1U Active CN218266562U (en) | 2022-08-30 | 2022-08-30 | Double-cylinder control hydraulic circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218266562U (en) |
-
2022
- 2022-08-30 CN CN202222295106.1U patent/CN218266562U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102226453B (en) | Dual-redundancy electro hydraulic servo actuator | |
| CN107059983B (en) | Minus flow imports and exports independent composite control hydraulic system | |
| CN204003683U (en) | A kind of hydraulic system and engineering machinery | |
| CN108317119A (en) | A kind of proportional multi-way valve that hydraulic control inlet and outlet throttling side can be separately adjustable | |
| CN110925252A (en) | Integrated multi-way valve, lifting hydraulic control system and crane | |
| CN218266562U (en) | Double-cylinder control hydraulic circuit | |
| CN210949337U (en) | Automatic high-low pressure switching hydraulic system and equipment applying same | |
| CN213682287U (en) | Steering hydraulic system and loader | |
| CN112324719A (en) | Redundancy electro-hydrostatic actuating system and control method | |
| CN106812752B (en) | Multiple directional control valve | |
| CN108343649B (en) | Load port/displacement independent control system based on single-side outlet throttle control valve group | |
| CN114955868A (en) | Load port independent control valve, hoisting machinery hydraulic system and working method thereof | |
| CN106762903B (en) | Multiple directional control valve | |
| WO2021174931A1 (en) | Device and system with control logic for automatically switching between high and low pressure, and control method therefor | |
| CN114704531A (en) | Hydraulic middle position floating integrated valve and hydraulic control system | |
| CN215719882U (en) | Multi-mode control system suitable for EHA | |
| CN219911945U (en) | Solenoid valve and hydraulic system | |
| CN219570480U (en) | Hydraulic valve group for opening and closing device | |
| CN112664492B (en) | Double-valve-group parallel control hydraulic system | |
| CN220451829U (en) | Electrohydraulic integrated valve group structure for controlling duplex blowout prevention box | |
| CN217735874U (en) | Multistage pressure control variable pump open system | |
| CN212924200U (en) | Novel crane hydraulic valve group | |
| CN109205472A (en) | A kind of crane hydraulic system having second voltage regulation function | |
| CN217873564U (en) | Cartridge valve composite hydraulic system for driving supercritical CO2 compressor | |
| CN218760671U (en) | Hydraulic locking device for switch |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |