Novel low-pressure oil supplementing and high-pressure overflowing oil cylinder opposite jacking passive loading loop

Abstract

The invention relates to the technical field of hydraulic oil cylinder loading loops, in particular to a novel low-pressure oil supplementing and high-pressure overflowing oil cylinder opposite jacking passive loading loop. According to the technical scheme, the novel low-pressure oil supplementing and high-pressure overflowing oil cylinder opposite jacking passive loading loop comprises a loading cylinder module, a pressure regulating overflow valve set, a pressure monitoring assembly, an electromagnetic reversing valve set, a ball valve set and a hydraulic lock assembly; through mutual cooperation of a loading cylinder module, a pressure regulating overflow valve group, a pressure monitoring assembly, an electromagnetic directional valve group, a ball valve group and a hydraulic lock assembly, the working conditions of low-pressure large-flow oil supplementation and high-pressure overflow loading can be realized while the position of a loading oil cylinder can be actively regulated during an oil cylinder top-to-top loading test; high-flow loading and high-pressure loading can be achieved at the same time with small power.

Description

Technical Field

[0001] The invention relates to the technical field of hydraulic cylinder loading circuits, and in particular to a novel low-pressure oil replenishment and high-pressure overflow oil cylinder top-to-top passive loading circuit. Background Art

[0002] Low-pressure oil replenishment and high-pressure overflow is a hydraulic system control technology that achieves efficient operation and safety protection of the hydraulic circuit by coordinating the low-pressure oil replenishment and high-pressure overflow mechanisms. During the operation of the hydraulic cylinder, the cavity oil is quickly replenished by low-pressure oil. This technology is widely used in construction machinery and test benches, especially in scenarios that require fast response and dynamic matching with high-pressure loads.

[0003] When the cylinder is actively loaded against the top, because the loading cylinder is a simulated load, the position of the loading cylinder cannot be actively adjusted. The load of the loading cylinder needs to be slightly smaller than the tested cylinder at all times during the extension and retraction process. Because most cylinders are single-rod cylinders, the areas of the rod chamber and the rodless chamber are inconsistent. When the pressure is consistent, the inconsistent areas will also lead to inconsistent extension and retraction load sizes, making it difficult to control the load size. When a large load and high movement speed are required, the active loading module has a large power, which will generate a large amount of overflow heating, resulting in a large amount of energy waste.

[0004] When a traditional oil cylinder is used for top loading, the loading cylinder needs to provide a suitable loading force and a suitable extension and retraction speed. When the loading force and the operating speed are very large, the loading oil source will provide a very high loading pressure and a large loading flow, which will cause the loading module to have a large power. If the operating time is very long, a large amount of energy will be wasted. For this reason, a new type of low-pressure oil replenishment and high-pressure overflow oil cylinder top passive loading circuit can be designed. Summary of the invention

[0005] In order to overcome the traditional cylinder top loading, the loading cylinder is required to provide appropriate loading force and appropriate extension and retraction speed. When the loading force and the running speed are very large, the loading oil source will provide a very high loading pressure and a large loading flow, which will cause the loading module to have a large power. If the running time is very long, it will cause a lot of energy waste.

[0006] The technical solution of the present invention is: a new type of low-pressure oil-supplement and high-pressure overflow oil cylinder top passive loading circuit, including a loading cylinder module, a pressure-regulating and overflowing valve group, a pressure monitoring component, an electromagnetic reversing valve group, a ball valve group and a hydraulic lock component; a loading cylinder module for loading circuit control, a pressure-regulating and overflowing valve group for controlling the flow of liquid distributed along the loading circuit, a pressure monitoring component connected to the pressure-regulating and overflowing valve group for real-time monitoring of the cavity pressure, an oil supply and return interface for access control on the loading circuit, an electromagnetic reversing valve group for controlling the action on the outside of the loading cylinder module, a ball valve group for controlling the on-off of the oil on the loading circuit, and a hydraulic lock component used in conjunction with the electromagnetic reversing valve group to control the locking of the oil circuit.

[0007] Preferably, the working conditions of low-pressure, large-flow oil replenishment and high-pressure overflow loading can be realized while actively adjusting the position of the loading cylinder during the top loading test of the cylinder, and a large flow accompanied by high-pressure loading can be realized with very small power.

[0008] Preferably, the loading cylinder module includes a first loading cylinder and a second loading cylinder which are independently arranged, and the first loading cylinder and the second loading cylinder both include a rod cavity and a rodless cavity.

[0009] Preferably, the pressure regulating and relief valve group includes a first rod chamber pressure regulating and relief valve, a first rodless chamber pressure regulating and relief valve, a second rod chamber pressure regulating and relief valve and a second rodless chamber pressure regulating and relief valve, which are arranged at the ends of the rod chamber and rodless chamber oil circuits of the two loading cylinders corresponding to the first loading cylinder and the second loading cylinder for independently adjusting the relief pressure of each cavity; the first rod chamber pressure regulating and relief valve, the first rodless chamber pressure regulating and relief valve, the second rod chamber pressure regulating and relief valve and the second rodless chamber pressure regulating and relief valve are correspondingly provided with a first rod chamber pressure gauge, a first rodless chamber pressure gauge, a second rodless chamber pressure gauge and a second rod chamber pressure gauge.

[0010] Preferably, the pressure regulating relief valve group realizes graded loading control of low-pressure oil replenishment and high-pressure overflow by independently adjusting the overflow pressure setting value of each cavity.

[0011] Preferably, the oil supply and oil return interface includes an oil supply port and an oil return port for connecting to an external hydraulic source and an oil return system, respectively.

[0012] Preferably, the electromagnetic reversing valve group includes a first electromagnetic reversing valve and a second electromagnetic reversing valve which respectively control the oil circuit directions of the two loading cylinders so as to realize the extension and retraction actions of the loading cylinders by gaining and losing power of the electromagnet.

[0013] Preferably, the ball valve group includes a first ball valve, a second ball valve, a third ball valve and a fourth ball valve for the oil inlet and return pipelines of the loading cylinder and for switching the oil circuit on and off. The ball valve group is divided into an active adjustment mode and a passive loading mode.

[0014] Preferably, the active adjustment mode is that the first ball valve and the third ball valve are closed, the second ball valve and the fourth ball valve are opened, and the oil directly controls the action of the loading cylinder through the electromagnetic reversing valve. The passive loading mode is that the first ball valve and the third ball valve are opened, the second ball valve and the fourth ball valve are closed, and the oil achieves pressure self-balancing through the pressure regulating overflow valve group.

[0015] Preferably, the hydraulic lock assembly includes a first hydraulic lock and a second hydraulic lock installed in the oil circuits of the two loading cylinders for locking the oil circuits when the electromagnetic reversing valve is in a neutral position and preventing the loading cylinders from accidentally moving.

[0016] Beneficial effects of the present invention:

[0017] 1. According to the traditional oil cylinder for top loading, the loading cylinder needs to provide appropriate loading force and appropriate extension and retraction speed. When the loading force and the running speed are very large, the loading oil source will provide very high loading pressure and a large loading flow, which will cause the loading module to have a large power. If the running time is very long, it will cause a lot of energy waste. The difference is that through the cooperation of the loading cylinder module, the pressure regulating overflow valve group, the pressure monitoring component, the electromagnetic reversing valve group, the ball valve group and the hydraulic lock component, the problem of actively adjusting the position of the loading cylinder and realizing low-pressure and high-flow oil replenishment and high-pressure overflow loading during the oil cylinder top loading test can be solved. Large flow and high pressure loading can be achieved with very small power. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of a loading circuit for controlling a valve according to the present invention.

[0019] Explanation of the reference numerals in the accompanying drawings: 1. first loading cylinder; 2. first rod chamber pressure gauge; 3. first rod chamber pressure regulating and relief valve; 4. oil return port; 5. first solenoid reversing valve; 6. first ball valve; 7. second ball valve; 8. first hydraulic lock; 9. second solenoid reversing valve; 10. oil supply port; 11. third ball valve; 12. fourth ball valve; 13. second hydraulic lock; 14. first rodless chamber pressure regulating and relief valve; 15. first rodless chamber pressure gauge; 16. second rod chamber pressure regulating and relief valve; 17. second rodless chamber pressure regulating and relief valve; 18. second rodless chamber pressure gauge; 19. second rod chamber pressure gauge; 20. second loading cylinder. DETAILED DESCRIPTION

[0020] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0021] See also Figure 1The present invention provides an embodiment: a novel low-pressure oil-supplementing and high-pressure overflow oil cylinder top passive loading circuit, comprising a loading cylinder module, a pressure-regulating and overflowing valve group, a pressure monitoring component, an electromagnetic reversing valve group, a ball valve group and a hydraulic lock component; a loading cylinder module for loading circuit control, a pressure-regulating and overflowing valve group for controlling flow distributed along the loading circuit, a pressure monitoring component connected to the pressure-regulating and overflowing valve group for real-time monitoring of cavity pressure, an oil supply and return interface for access control on the loading circuit, an electromagnetic reversing valve group for controlling action on the outside of the loading cylinder module, a ball valve group for controlling oil on and off on the loading circuit, and a hydraulic lock component for controlling the locking of the oil circuit in cooperation with the electromagnetic reversing valve group.

[0022] The loading cylinder module includes a first loading cylinder 1 and a second loading cylinder 20 which are independently arranged. The first loading cylinder 1 and the second loading cylinder 20 both include a rod cavity and a rodless cavity.

[0023] The pressure regulating and relief valve group includes a first rod chamber pressure regulating and relief valve 3, a first rodless chamber pressure regulating and relief valve 14, a second rod chamber pressure regulating and relief valve 16 and a second rodless chamber pressure regulating and relief valve 17, which are arranged at the ends of the rod chamber and rodless chamber oil circuits of the two loading cylinders corresponding to the first loading cylinder 1 and the second loading cylinder 20 for independently adjusting the relief pressure of each cavity. The first rod chamber pressure regulating and relief valve 3, the first rodless chamber pressure regulating and relief valve 14, the second rod chamber pressure regulating and relief valve 16 and the second rodless chamber pressure regulating and relief valve 17 are correspondingly provided with a first rod chamber pressure gauge 2, a first rodless chamber pressure gauge 15, a second rodless chamber pressure gauge 18 and a second rod chamber pressure gauge 19. The pressure regulating and relief valve group realizes graded loading control of low-pressure oil replenishment and high-pressure relief by independently adjusting the relief pressure setting value of each cavity.

[0024] The oil supply and return oil interface includes an oil supply port 10 and an oil return port 4 for connecting to an external hydraulic source and an oil return system respectively. The electromagnetic reversing valve group includes a first electromagnetic reversing valve 5 and a second electromagnetic reversing valve 9 for respectively controlling the oil circuit directions of the two loading cylinders to realize the extension and retraction actions of the loading cylinders by gaining and losing power of the electromagnet.

[0025] The ball valve group includes a first ball valve 6, a second ball valve 7, a third ball valve 11 and a fourth ball valve 12 for loading the oil inlet and return pipelines of the cylinder and for switching the oil circuit on and off. The ball valve group is divided into an active adjustment mode and a passive loading mode.

[0026] In the active adjustment mode, the first ball valve 6 and the third ball valve 11 are closed, the second ball valve 7 and the fourth ball valve 12 are opened, and the oil directly controls the action of the loading cylinder through the electromagnetic reversing valve. In the passive loading mode, the first ball valve 6 and the third ball valve 11 are opened, the second ball valve 7 and the fourth ball valve 12 are closed, and the oil achieves pressure self-balancing through the pressure regulating relief valve group.

[0027] The hydraulic lock assembly includes a first hydraulic lock 8 and a second hydraulic lock 13 installed in the oil circuits of the two loading cylinders for locking the oil circuits when the electromagnetic reversing valve is in the middle position and preventing the loading cylinders from accidentally moving.

[0028] When working, there are two working states;

[0029] In the first working state, the first ball valve 6 is in a closed state, and the second ball valve 7 is in an open state. At this time, the first loading cylinder 1 can be extended by controlling the electromagnet YA1 to be energized, and the first loading cylinder 1 can be retracted by controlling the electromagnet YB1 to be energized, thereby realizing the function of actively controlling and adjusting the position of the loading cylinder;

[0030] In the second working state, the first ball valve 6 is in the open state, the second ball valve 7 is in the closed state, and the electromagnet YB1 is in the energized state. At this time, the external oil supply of the oil supply port 10 is in a low-pressure oil supply state, and the loading cylinder performs passive loading work under the drag of the test cylinder. When the loading cylinder is dragged and extended, the first rod chamber pressure regulating relief valve 3 works to adjust the overflow loading pressure, and the rodless chamber of the first loading cylinder 1 is replenished by the oil supply circuit; when the loading cylinder is dragged and retracted, the first rodless chamber pressure regulating relief valve 14 works to adjust the overflow loading pressure, and the rod chamber of the first loading cylinder 1 is replenished by the oil supply circuit. In this way, the extension and retraction loading pressures of the loading cylinder, that is, the size of the loading force, can be independently adjusted to achieve the loading condition of low-pressure replenishment and high-pressure overflow.

[0031] Through the above steps, the loading cylinder module, the pressure regulating relief valve group, the pressure monitoring component, the electromagnetic reversing valve group, the ball valve group and the hydraulic lock component cooperate with each other to solve the problem of actively adjusting the position of the loading cylinder during the top loading test of the cylinder while realizing low-pressure and high-flow oil replenishment and high-pressure overflow loading. It can achieve high flow and high-pressure loading with very small power.

[0032] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of those skilled in the art without departing from the spirit of the present invention.

Claims

1. A novel low-pressure oil replenishment and high-pressure overflow oil cylinder top passive loading circuit, including a loading cylinder module; characterized in that: It also includes a pressure-regulating relief valve group, a pressure monitoring component, an electromagnetic reversing valve group, a ball valve group and a hydraulic lock component; a loading cylinder module for loading circuit control, a pressure-regulating relief valve group for controlling fluid flow distributed along the loading circuit, a pressure monitoring component connected to the pressure-regulating relief valve group for real-time monitoring of cavity pressure, an oil supply and return interface for access control on the loading circuit, an electromagnetic reversing valve group for controlling action is provided on the outside of the loading cylinder module, a ball valve group for controlling the on-off of oil is provided on the loading circuit, and a hydraulic lock component used in conjunction with the electromagnetic reversing valve group to control the locking of the oil circuit.

2. According to claim 1, a novel low-pressure oil replenishment and high-pressure overflow oil cylinder top passive loading circuit is characterized by: The loading cylinder module comprises a first loading cylinder (1) and a second loading cylinder (20) which are independently arranged, and the first loading cylinder (1) and the second loading cylinder (20) both comprise a rod cavity and a rodless cavity.

3. According to claim 2, a new type of low-pressure oil replenishment and high-pressure overflow oil cylinder top passive loading circuit is characterized by: The pressure regulating relief valve group comprises a first rod chamber pressure regulating relief valve (3), a first rodless chamber pressure regulating relief valve (14), a second rod chamber pressure regulating relief valve (16) and a second rodless chamber pressure regulating relief valve (17) which are arranged at the ends of the rod chamber and rodless chamber oil circuits of the two loading cylinders corresponding to the first loading cylinder (1) and the second loading cylinder (20) for independently regulating the relief pressure of each chamber; the first rod chamber pressure regulating relief valve (3), the first rodless chamber pressure regulating relief valve (14), the second rod chamber pressure regulating relief valve (16) and the second rodless chamber pressure regulating relief valve (17) are correspondingly provided with a first rod chamber pressure gauge (2), a first rodless chamber pressure gauge (15), a second rodless chamber pressure gauge (18) and a second rod chamber pressure gauge (20).

4. According to claim 2, a new type of low-pressure oil replenishment and high-pressure overflow oil cylinder top passive loading circuit is characterized by: The pressure regulating relief valve group realizes graded loading control of low-pressure oil replenishment and high-pressure overflow by independently adjusting the overflow pressure setting value of each cavity.

5. According to claim 1, a novel low-pressure oil replenishment and high-pressure overflow oil cylinder top passive loading circuit is characterized by: The oil supply and oil return interface comprises an oil supply port (10) and an oil return port (4) for connecting to an external hydraulic source and an oil return system respectively.

6. According to claim 1, a novel low-pressure oil replenishment and high-pressure overflow oil cylinder top passive loading circuit is characterized by: The electromagnetic reversing valve group comprises a first electromagnetic reversing valve (5) and a second electromagnetic reversing valve (9) which respectively control the oil path directions of the two loading cylinders and are used to realize the extension and retraction actions of the loading cylinders by gaining and losing power of the electromagnet.

7. According to claim 1, a novel low-pressure oil replenishment and high-pressure overflow oil cylinder top passive loading circuit is characterized by: The ball valve group comprises a first ball valve (6), a second ball valve (7), a third ball valve (11) and a fourth ball valve (12) for use in the oil inlet and return pipelines of the loading cylinder and for switching the oil circuit on and off. The ball valve group is divided into an active adjustment mode and a passive loading mode.

8. According to claim 7, a novel low-pressure oil replenishment and high-pressure overflow oil cylinder top passive loading circuit is characterized by: In the active regulation mode, the first ball valve (6) and the third ball valve (11) are closed, the second ball valve (7) and the fourth ball valve (12) are opened, and the oil directly controls the action of the loading cylinder through the electromagnetic reversing valve. In the passive loading mode, the first ball valve (6) and the third ball valve (11) are opened, the second ball valve (7) and the fourth ball valve (12) are closed, and the oil realizes pressure self-balancing through the pressure regulating relief valve group.

9. According to claim 1, a novel low-pressure oil replenishment and high-pressure overflow oil cylinder top passive loading circuit is characterized by: The hydraulic lock assembly comprises a first hydraulic lock (8) and a second hydraulic lock installed in the oil circuits of two loading cylinders for locking the oil circuits when the electromagnetic reversing valve is in the middle position and preventing the loading cylinders from accidentally moving.

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