CN115978034A - Hydraulic locking system and hydraulic equipment - Google Patents
Hydraulic locking system and hydraulic equipment Download PDFInfo
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- CN115978034A CN115978034A CN202111197504.3A CN202111197504A CN115978034A CN 115978034 A CN115978034 A CN 115978034A CN 202111197504 A CN202111197504 A CN 202111197504A CN 115978034 A CN115978034 A CN 115978034A
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Abstract
The invention discloses a hydraulic locking system, which comprises a hydraulic oil cylinder, a control valve for controlling the reversing of the hydraulic oil cylinder, a hydraulic control one-way valve and a pressure isolating valve, wherein one of a first oil path and a second oil path is provided with the hydraulic control one-way valve, the other of the first oil path and the second oil path is connected with an oil inlet of the pressure isolating valve, an oil outlet of the pressure isolating valve is connected with a hydraulic control port of the hydraulic control one-way valve, and a pressure relief port of the pressure isolating valve is connected with an oil tank; the oil outlet of the pressure isolating valve is communicated with the pressure relief opening when the oil inlet of the pressure isolating valve is low in pressure, and the oil outlet of the pressure isolating valve is communicated with the oil inlet when the oil inlet of the pressure isolating valve is high in pressure. The locking effect is prevented from being influenced by load change of a locking end of the hydraulic oil cylinder and oil return backpressure and pressure fluctuation, the reliability and stability of the equipment are improved, the structural form is simple, the connection mode is flexible and changeable, the adjustment is convenient, and the energy conservation and the high efficiency are realized. The invention also discloses hydraulic equipment comprising the hydraulic locking system.
Description
Technical Field
The invention relates to the field of hydraulic pressure, in particular to a hydraulic locking system. Furthermore, the invention also relates to a hydraulic device comprising the hydraulic locking system.
Background
Hydraulic equipment is widely applied to various technical fields, and in order to meet specific use requirements, a hydraulic locking system is needed to be used, so that when an actuating element stops working, the actuating element is locked at a required position. For example, when a hydraulic cylinder requires a long-time and high-precision locking position, a hydraulic check valve is used to form a locking circuit.
The closing effect of the hydraulic control one-way valve can be influenced by the load and the back pressure of the executing mechanism, and the hydraulic loop has the fault of insufficient locking precision under the light load working condition with large load change and slightly large oil return back pressure or oil return impact. The return oil back pressure or the return oil pressure impact can cause that a valve core of the hydraulic control one-way valve cannot be closed, and the influence can be generated by a hydraulic system, or the return oil pressure transmission in other load action processes can cause the fault of poor locking.
Therefore, how to provide a hydraulic locking system for avoiding oil return back pressure or oil return impact is a technical problem to be solved by those skilled in the art.
Disclosure of Invention
The invention aims to provide a hydraulic locking system, which has the advantages that the locking effect is prevented from being influenced by load change of a locking end of a hydraulic oil cylinder, oil return backpressure and pressure fluctuation, and the reliability of equipment is improved. Another object of the present invention is to provide a hydraulic apparatus comprising the hydraulic locking system described above.
In order to solve the technical problem, the invention provides a hydraulic locking system which comprises a hydraulic oil cylinder and a control valve for controlling the reversing of the hydraulic oil cylinder, wherein a first working oil port of the control valve is communicated with a rodless cavity of the hydraulic oil cylinder through a first oil way, and a second working oil port of the control valve is communicated with a rod cavity of the hydraulic oil cylinder through a second oil way;
the oil-gas separator further comprises a hydraulic control one-way valve and a pressure isolating valve, wherein the hydraulic control one-way valve is arranged on one of the first oil path and the second oil path, the other one of the first oil path and the second oil path is connected with an oil inlet of the pressure isolating valve, an oil outlet of the pressure isolating valve is connected with a hydraulic control port of the hydraulic control one-way valve, and a pressure relief port of the pressure isolating valve is connected with an oil tank;
when the oil inlet of the pressure isolating valve is low in pressure, the oil outlet of the pressure isolating valve is communicated with the pressure relief opening, and when the oil inlet of the pressure isolating valve is high in pressure, the oil outlet of the pressure isolating valve is communicated with the oil inlet;
when the hydraulic control port of the hydraulic control one-way valve is in low pressure, the hydraulic control one-way valve allows hydraulic oil to flow to the hydraulic oil cylinder in one direction from the control valve, and when the hydraulic control port of the hydraulic control one-way valve is in high pressure, the hydraulic control one-way valve is conducted in two directions.
Preferably, one end of the pressure isolating valve is provided with a hydraulic control cavity, the other end of the pressure isolating valve is provided with a spring reset cavity, the hydraulic control cavity is connected with an oil inlet of the pressure isolating valve, and the pressure isolating valve controls the movement of the inner valve core through the pressure in the hydraulic control cavity and the spring pressure in the spring reset cavity.
Preferably, the pressure isolating valve is a two-position three-way hydraulic control reversing valve, when the pressure in the hydraulic control cavity is smaller than the pressure in the spring return cavity, the two-position three-way hydraulic control reversing valve is in the first station, so that the oil outlet of the two-position three-way hydraulic control reversing valve is communicated with the pressure relief opening, when the pressure in the hydraulic control cavity is greater than the pressure in the spring return cavity, the two-position three-way hydraulic control reversing valve is in the second station, so that the oil outlet of the two-position three-way hydraulic control reversing valve is communicated with the oil inlet.
Preferably, the spring return chamber is connected to a pressure relief port of the pressure block valve.
Preferably, the control valve is a three-position four-way electromagnetic directional valve.
Preferably, the middle position of the three-position four-way electromagnetic directional valve is a Y-shaped function.
Preferably, the hydraulic control check valve is arranged on the first oil path, and an oil inlet of the pressure isolating valve is connected with the second oil path.
Preferably, the hydraulic control check valve is arranged on the second oil path, and an oil inlet of the pressure isolating valve is connected with the first oil path.
Preferably, the two pilot operated check valves are respectively disposed in the first oil passage and the second oil passage, the pressure block valve connected to the pilot operated check valve located in the first oil passage is connected to the second oil passage, and the pressure block valve connected to the pilot operated check valve located in the second oil passage is connected to the first oil passage.
The invention provides a hydraulic device comprising a hydraulic locking system as described in any one of the above.
The invention provides a hydraulic locking system which comprises a hydraulic oil cylinder and a control valve for controlling the reversing of the hydraulic oil cylinder, wherein a first working oil port of the control valve is communicated with a rodless cavity of the hydraulic oil cylinder through a first oil way, and a second working oil port of the control valve is communicated with a rod cavity of the hydraulic oil cylinder through a second oil way; the hydraulic control one-way valve is arranged on one of the first oil path and the second oil path, the other of the first oil path and the second oil path is connected with an oil inlet of the pressure isolating valve, an oil outlet of the pressure isolating valve is connected with a hydraulic control port of the hydraulic control one-way valve, and a pressure relief port of the pressure isolating valve is connected with an oil tank; the oil outlet of the pressure isolating valve is communicated with the pressure relief opening when the oil inlet of the pressure isolating valve is low in pressure, and the oil outlet of the pressure isolating valve is communicated with the oil inlet when the oil inlet of the pressure isolating valve is high in pressure; the hydraulic control check valve allows hydraulic oil to flow from the control valve to the hydraulic oil cylinder in a one-way mode when a hydraulic control port of the hydraulic control check valve is low in pressure, and the hydraulic control check valve is conducted in two directions when the hydraulic control port of the hydraulic control check valve is high in pressure.
The opening of the hydraulic control one-way valve is controlled through the pressure isolating valve, so that a hydraulic control port of the hydraulic control one-way valve is isolated from a hydraulic oil source, the reverse opening of the hydraulic control one-way valve is not influenced by the fluctuation of the hydraulic oil source, the hydraulic control port of the hydraulic control one-way valve is directly communicated with an oil tank in a normal state, the locking effect is prevented from being changed by the load of a locking end of the hydraulic oil cylinder, the influence of oil return backpressure and pressure fluctuation is avoided, the reliability and the stability of equipment are improved, the structural form is simple, the connection mode is flexible and changeable, the regulation is convenient, energy is saved, and the efficiency is high.
The invention also provides a hydraulic device comprising the hydraulic locking system, and the hydraulic device has the technical effects due to the technical effects of the hydraulic locking system, so that the hydraulic device also has the same technical effects, and the hydraulic device is not described in detail.
Drawings
FIG. 1 is a hydraulic schematic diagram of a first embodiment of a hydraulic locking system provided by the present invention;
FIG. 2 is a hydraulic schematic diagram of a second embodiment of a hydraulic locking system provided by the present invention;
fig. 3 is a hydraulic schematic diagram of a third embodiment of the hydraulic locking system provided by the invention.
Detailed Description
The core of the invention is to provide a hydraulic locking system, the locking effect is prevented from being influenced by load change of a locking end of a hydraulic oil cylinder, oil return back pressure and pressure fluctuation, and the reliability of equipment is improved. Another core of the present invention is to provide a hydraulic apparatus comprising the above hydraulic locking system.
In order that those skilled in the art will better understand the disclosure, the invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1, fig. 1 is a hydraulic schematic diagram of a first embodiment of a hydraulic locking system according to the present invention.
The specific embodiment of the invention provides a hydraulic locking system which comprises a hydraulic oil cylinder 1, a control valve 2, a hydraulic control one-way valve 3 and a pressure isolating valve 4, wherein the hydraulic oil cylinder 1 is a power execution element, an oil supply port and an oil return port of the control valve 2 are connected with an oil supply system, two working oil ports of the control valve 2 are connected with the hydraulic oil cylinder 1 and used for controlling reversing action of the hydraulic oil cylinder 1, a first working oil port of the control valve 2 is communicated with a rodless cavity of the hydraulic oil cylinder 1 through a first oil path, and a second working oil port of the control valve 2 is communicated with a rod cavity of the hydraulic oil cylinder 1 through a second oil path. Meanwhile, other power executing elements such as oil cylinders or motors can exist in the whole equipment and are also connected with an oil supply system, so that actions of the other power executing elements can also influence the hydraulic oil cylinder 1.
The hydraulic control one-way valve 3 is provided with a first port, a second port and a hydraulic control port, the first port and the second port are connected into an oil path and are respectively connected with the hydraulic oil cylinder 1 and the control valve 2, the pressure isolating valve 4 is provided with an oil inlet, an oil outlet and a pressure relief port, namely, the hydraulic control one-way valve 3 is arranged on one of the first oil path and the second oil path, the other of the first oil path and the second oil path is connected with the oil inlet of the pressure isolating valve 4, the oil outlet of the pressure isolating valve 4 is connected with the hydraulic control port of the hydraulic control one-way valve 3, and the pressure relief port of the pressure isolating valve 4 is connected with the oil tank 5.
The action principle of the pressure isolating valve 4 is as follows: the oil outlet of the pressure isolating valve 4 is communicated with the pressure relief opening when the oil inlet of the pressure isolating valve 4 is low in pressure, and the oil outlet of the pressure isolating valve 4 is communicated with the oil inlet when the oil inlet of the pressure isolating valve 4 is high in pressure. The action principle of the hydraulic control one-way valve 3 is as follows: when the hydraulic control port of the hydraulic control one-way valve 3 is at low pressure, the hydraulic control one-way valve 3 allows hydraulic oil to flow from the control valve 2 to the hydraulic oil cylinder 1 in one way, and when the hydraulic control port of the hydraulic control one-way valve 3 is at high pressure, the hydraulic control one-way valve 3 is conducted in two ways.
Further, for control pressure block valve 4, the one end of pressure block valve 4 is provided with the hydraulic control chamber, and the other end of pressure block valve 4 is provided with the spring chamber that resets, and the oil inlet of pressure block valve 4 is connected in the hydraulic control chamber, and the pressure oil in the oil circuit can get into the hydraulic control chamber promptly, and then through the action of pressure control pressure block valve 4, by the size of the predetermined pressure value of the spring regulation in the spring chamber that resets simultaneously, realizes accurate control. The pressure isolating valve 4 controls the movement of the inner valve core through the pressure in the hydraulic control cavity and the pressure of the spring in the spring return cavity.
Specifically, the pressure isolating valve 4 is a two-position three-way hydraulic control reversing valve, when the pressure in the hydraulic control cavity is smaller than the pressure in the spring reset cavity, the two-position three-way hydraulic control reversing valve is located at a first station, so that the oil outlet of the two-position three-way hydraulic control reversing valve is communicated with the pressure relief opening, and when the pressure in the hydraulic control cavity is larger than the pressure in the spring reset cavity, the two-position three-way hydraulic control reversing valve is located at a second station, so that the oil outlet of the two-position three-way hydraulic control reversing valve is communicated with the oil inlet.
Referring to fig. 1, the operation process of the system is described through the first embodiment, in the first embodiment, a pilot operated check valve 3 is arranged in the first oil path, and an oil inlet of a pressure block valve 4 is connected with the second oil path. When the hydraulic oil cylinder 1 stretches out, the control valve 2 is in a left position, pressure oil enters a rodless cavity of the hydraulic oil cylinder 1 through the control valve 2 through a second oil path, the second oil path is in a high-pressure state at the same time, the high-pressure oil reaches an oil inlet of the pressure isolating valve 4, the oil inlet is in the high-pressure state, the high-pressure oil also can enter a hydraulic control cavity, the pressure is higher than that of a spring reset cavity, a valve core of the pressure isolating valve 4 is pushed to be in a second station in a transposition mode, the oil inlet of the pressure isolating valve 4 is communicated with an oil outlet, the high-pressure oil reaches a hydraulic control port of the hydraulic control one-way valve 3 through the pressure isolating valve 4, a hydraulic port of the hydraulic control one-way valve 3 is in a high-pressure state, and the hydraulic control one-way valve 3 reaches opening pressure and is opened reversely. The hydraulic oil in the rod cavity of the hydraulic oil cylinder 1 flows through the first oil duct through the hydraulic control one-way valve 3, enters the control valve 2 and flows out from the oil return port of the control valve 2, and the stretching action of the hydraulic oil cylinder 1 is completed.
When the hydraulic oil cylinder 1 retracts, the control valve 2 is located at the right position, pressure oil enters a rod cavity of the hydraulic oil cylinder 1 from the first oil way through the control valve 2, and at the moment, due to the structure of the hydraulic control one-way valve 3, the hydraulic oil is not limited to flow in the direction and normally enters the rod cavity. Meanwhile, oil in the rodless cavity of the hydraulic oil cylinder 1 flows back to the control valve 2 through the second oil way and finally flows out of an oil return port of the control valve 2, and the retraction action of the hydraulic oil cylinder 1 is completed.
No matter the hydraulic cylinder 1 is in the process of stretching out or retracting, when any position stops, the control is in the meso position, the pressure oil stops supplying oil, in the process, the second oil path is in the low-pressure state, the hydraulic control cavity of the pressure isolating valve 4 is in the low-pressure state, the spring in the spring reset cavity pushes the valve core of the pressure isolating valve 4 to be in the first station in a transposition mode, the oil outlet of the pressure isolating valve 4 is communicated with the pressure relief opening, the pressure cannot be transmitted to the hydraulic control one-way valve 3, the oil outlet of the pressure isolating valve 4 is in the low-pressure state, the hydraulic control opening of the hydraulic control one-way valve 3 is also in the low-pressure state, the hydraulic control one-way valve 3 cannot be opened, the hydraulic control one-way valve 3 can only flow in a single direction, further, the hydraulic oil in the rod cavity of the hydraulic cylinder 1 is limited to flow out, the hydraulic cylinder 1 cannot stretch out, and the position locking is realized. Meanwhile, the hydraulic control port of the hydraulic control one-way valve 3 is equivalent to be directly communicated with the oil tank 5, and the hydraulic control port is quickly decompressed, so that the hydraulic control one-way valve 3 can be quickly and reliably closed. Thereby achieving the effect that the hydraulic control one-way valve 3 can carry out one-way reliable locking on the extending action of the hydraulic oil cylinder 1.
Further, the spring force of the spring return chamber of the pressure block valve 4 can be set according to the fluctuation of the oil return back pressure, so that the locking reliability of the hydraulic oil cylinder 1 is improved. The return oil pressure when other action executing elements act cannot be transmitted to the pilot port of the pilot check valve 3, and thus cannot be opened.
Opening of hydraulic control check valve 3 is controlled through pressure block valve 4, thereby cut off hydraulic control mouth and the hydraulic oil source of hydraulic control check valve 3, make reverse opening of hydraulic control check valve 3 not receive the undulant influence of hydraulic oil source, because hydraulic control mouth of hydraulic control check valve 3 directly communicates with oil tank 5 during the normality, consequently the effect of locking avoids receiving hydraulic cylinder 1 locking end load change, and the influence of oil return backpressure and pressure fluctuation, lifting means reliability and stability, and structural style is simple, the connected mode is nimble changeable, it is convenient and energy-conserving high-efficient to adjust.
Preferably, the spring force in the spring return cavity is a preset reversing pressure of the pressure isolating valve 4, when the pressure in the oil path is greater than the spring force, the pressure isolating valve 4 can be reversed, otherwise, the pressure isolating valve is kept in an initial state under the action of the spring force. The pressure release mouth of pressure block valve 4 is connected to the spring chamber that resets, further promotes equipment stability, and any external fluctuation can not influence the switching-over pressure of predetermineeing of pressure block valve 4.
In the hydraulic locking system provided by the specific embodiment of the invention, the control valve 2 is specifically a three-position four-way electromagnetic directional valve, the middle position of the three-position four-way electromagnetic directional valve is in a Y-shaped function, and the spring force of a spring reset cavity of the pressure isolating valve 4 can be reduced, so that the purposes of energy conservation and high efficiency are achieved. The structure types of the valves can be adjusted according to conditions, for example, the control valve 2 adopts an electro-hydraulic reversing valve or a multi-way reversing valve, and the pressure isolating valve 4 is expanded to a two-position four-way valve, a three-position four-way valve, and the like. All the components can be connected in a pipe type, a plate type or a plug-in integrated mode, and the like, and the protection scope of the invention is achieved.
Referring to fig. 2, fig. 2 is a hydraulic schematic diagram of a second embodiment of the hydraulic locking system provided in the present invention.
On the basis of the hydraulic locking system provided by each of the above embodiments, the hydraulic control check valve 3 is arranged in the second oil path, and the oil inlet of the pressure isolating valve 4 is connected to the first oil path. When the hydraulic oil cylinder 1 extends out, the control valve 2 is in a left position, pressure oil enters a rodless cavity of the hydraulic oil cylinder 1 from the second oil way through the control valve 2, at the moment, due to the structure of the hydraulic control one-way valve 3, the flow of the hydraulic oil in the direction is not limited and normally enters the rodless cavity, meanwhile, oil in the rod cavity of the hydraulic oil cylinder 1 flows back to the control valve 2 from the first oil way and finally flows out from an oil return port of the control valve 2, and the extending action of the hydraulic oil cylinder 1 is completed
When the hydraulic oil cylinder 1 retracts, the control valve 2 is in the right position, meanwhile, the first oil path is in a high-pressure state, high-pressure oil reaches an oil inlet of the pressure isolating valve 4, the oil inlet is in the high-pressure state, the high-pressure oil also can enter the hydraulic control cavity, the pressure is higher than that of the spring reset cavity, the valve core of the pressure isolating valve 4 is pushed to be in the second position in a transposition mode, the oil inlet of the pressure isolating valve 4 is communicated with an oil outlet, the high-pressure oil reaches a hydraulic control port of the hydraulic control one-way valve 3 through the pressure isolating valve 4, the hydraulic port of the hydraulic control one-way valve 3 is in the high-pressure state, and the hydraulic control one-way valve 3 reaches opening pressure and is opened reversely. The hydraulic oil in the rodless cavity of the hydraulic oil cylinder 1 flows through the second oil duct through the hydraulic control one-way valve 3, enters the control valve 2 and flows out from the oil return port of the control valve 2, and the retraction action of the hydraulic oil cylinder 1 is completed.
No matter the hydraulic cylinder 1 is in the process of stretching out or retracting, when any position stops, the control is in the meso-position, the pressure oil stops supplying oil, in the process, the second oil path is in the low-pressure state, the hydraulic control cavity of the pressure isolating valve 4 is in the low-pressure state, the spring in the spring reset cavity pushes the valve core of the pressure isolating valve 4 to be transposed at the first station, the oil outlet of the pressure isolating valve 4 is communicated with the pressure relief opening, the pressure cannot be transmitted to the hydraulic control one-way valve 3, the oil outlet of the pressure isolating valve 4 is in the low-pressure state, the hydraulic control opening of the hydraulic control one-way valve 3 is also in the low-pressure state, the hydraulic control one-way valve 3 cannot be opened, the hydraulic control one-way valve 3 can only flow in one direction, further, the hydraulic oil in the rodless cavity of the hydraulic cylinder 1 is limited to flow out, the hydraulic cylinder 1 cannot retract, and the position locking is realized. Meanwhile, the hydraulic control port of the hydraulic control one-way valve 3 is equivalent to be directly communicated with the oil tank 5, and the hydraulic control port is quickly decompressed, so that the hydraulic control one-way valve 3 can be quickly and reliably closed. Thereby achieving the effect of one-way reliable locking of the hydraulic oil cylinder 1 retraction action by the hydraulic control one-way valve 3.
Referring to fig. 3, fig. 3 is a hydraulic schematic diagram of a third embodiment of the hydraulic locking system provided in the present invention.
On the basis of the hydraulic locking system provided by each specific embodiment, two hydraulic control one-way valves 3 and two pressure isolating valves 4 are arranged, the two hydraulic control one-way valves 3 are respectively arranged on the first oil way and the second oil way, the pressure isolating valves 4 connected with the hydraulic control one-way valves 3 positioned on the first oil way are connected with the second oil way, and the pressure isolating valves 4 connected with the hydraulic control one-way valves 3 positioned on the second oil way are connected with the first oil way. Through the working mode, bidirectional locking of extension and retraction is achieved.
In addition to the above hydraulic locking system, a specific embodiment of the present invention further provides a hydraulic device including the above hydraulic locking system, and the structure of other parts of the hydraulic device refers to the prior art and is not described herein again.
The hydraulic locking system and the hydraulic equipment provided by the invention are described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (10)
1. A hydraulic locking system comprises a hydraulic oil cylinder (1) and a control valve (2) used for controlling the reversing of the hydraulic oil cylinder (1), wherein a first working oil port of the control valve (2) is communicated with a rodless cavity of the hydraulic oil cylinder (1) through a first oil way, and a second working oil port of the control valve (2) is communicated with a rod cavity of the hydraulic oil cylinder (1) through a second oil way;
the hydraulic control one-way valve (3) is arranged on one of the first oil path and the second oil path, the other of the first oil path and the second oil path is connected with an oil inlet of the pressure isolating valve (4), an oil outlet of the pressure isolating valve (4) is connected with a hydraulic control port of the hydraulic control one-way valve (3), and a pressure relief port of the pressure isolating valve (4) is connected with an oil tank (5);
when the oil inlet of the pressure isolating valve (4) is low in pressure, the oil outlet of the pressure isolating valve (4) is communicated with a pressure relief opening, and when the oil inlet of the pressure isolating valve (4) is high in pressure, the oil outlet of the pressure isolating valve (4) is communicated with the oil inlet;
when the hydraulic control port of the hydraulic control one-way valve (3) is at low pressure, the hydraulic control one-way valve (3) allows hydraulic oil to flow to the hydraulic oil cylinder (1) in one direction from the control valve (2), and when the hydraulic control port of the hydraulic control one-way valve (3) is at high pressure, the hydraulic control one-way valve (3) is conducted in two directions.
2. The hydraulic locking system according to claim 1, characterized in that one end of the pressure isolating valve (4) is provided with a hydraulic control cavity, the other end of the pressure isolating valve (4) is provided with a spring return cavity, the hydraulic control cavity is connected with the oil inlet of the pressure isolating valve (4), and the pressure isolating valve (4) controls the movement of the inner valve core through the pressure in the hydraulic control cavity and the spring pressure in the spring return cavity.
3. The hydraulic locking system according to claim 2, wherein the pressure isolating valve (4) is a two-position three-way hydraulic control directional control valve, when the pressure in the hydraulic control chamber is smaller than the pressure in the spring return chamber, the two-position three-way hydraulic control directional control valve is at a first station, so that the oil outlet of the two-position three-way hydraulic control directional control valve is communicated with the pressure relief port, and when the pressure in the hydraulic control chamber is greater than the pressure in the spring return chamber, the two-position three-way hydraulic control directional control valve is at a second station, so that the oil outlet of the two-position three-way hydraulic control directional control valve is communicated with the oil inlet.
4. A hydraulic locking system according to claim 3, characterized in that the spring return chamber is connected to a pressure relief opening of the pressure isolating valve (4).
5. Hydraulic locking system according to claim 1, characterized in that the control valve (2) is embodied as a three-position four-way electromagnetic directional valve.
6. The hydraulic latching system of claim 5 wherein the neutral position of the three-position, four-way solenoid directional valve is a Y-function.
7. The hydraulic locking system according to any one of claims 1 to 6, characterized in that the pilot operated check valve (3) is arranged in the first oil path, and the oil inlet of the pressure block valve (4) is connected with the second oil path.
8. The hydraulic locking system according to any one of claims 1 to 6, characterized in that the pilot operated check valve (3) is arranged in the second oil path, and the oil inlet of the pressure block valve (4) is connected with the first oil path.
9. The hydraulic locking system according to any one of claims 1 to 6, characterized in that two pilot operated check valves (3) are provided in the first and second oil passages, respectively, the pressure block valve (4) connected to the pilot operated check valve (3) located in the first oil passage is connected to the second oil passage, and the pressure block valve (4) connected to the pilot operated check valve (3) located in the second oil passage is connected to the first oil passage.
10. Hydraulic device, characterized in that it comprises a hydraulic locking system according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111197504.3A CN115978034A (en) | 2021-10-14 | 2021-10-14 | Hydraulic locking system and hydraulic equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111197504.3A CN115978034A (en) | 2021-10-14 | 2021-10-14 | Hydraulic locking system and hydraulic equipment |
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| Publication Number | Publication Date |
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| CN115978034A true CN115978034A (en) | 2023-04-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111197504.3A Pending CN115978034A (en) | 2021-10-14 | 2021-10-14 | Hydraulic locking system and hydraulic equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116608181A (en) * | 2023-05-19 | 2023-08-18 | 湖北盛达动力科技有限公司 | Combined power unit for replacing electricity of heavy truck |
-
2021
- 2021-10-14 CN CN202111197504.3A patent/CN115978034A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116608181A (en) * | 2023-05-19 | 2023-08-18 | 湖北盛达动力科技有限公司 | Combined power unit for replacing electricity of heavy truck |
| CN116608181B (en) * | 2023-05-19 | 2024-01-19 | 湖北盛达动力科技有限公司 | Combined power unit for replacing electricity of heavy truck |
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