Oil cylinder emergency control system

Abstract

The utility model discloses an oil cylinder emergency control system, which belongs to the technical field of hydraulic control systems and comprises an energy accumulator and an oil cylinder communicated with the energy accumulator, and a control component used for connecting and disconnecting a pipeline is arranged on the pipeline for connecting the energy accumulator and the oil cylinder. The control part comprises a hydraulic control one-way valve and a manual control valve capable of enabling oil liquid to flow between the energy accumulator and the oil cylinder in two directions, and the hydraulic control one-way valve and the manual control valve are arranged in parallel; by arranging the manual control valve connected with the hydraulic control one-way valve in parallel, when the hydraulic control one-way valve breaks down, the oil way between the energy accumulator and the oil cylinder is communicated through the manual control valve, and the oil cylinder can continue to work normally; the oil tank and the energy accumulator, the oil tank and the oil cylinder and the energy accumulator and the oil cylinder are communicated through the direction valve, when the pressure of oil pumped out of the oil tank is stable, oil is supplied to the oil cylinder through the oil tank, and when the pressure of the oil pumped out of the oil tank is unstable, the energy accumulator is switched to supply oil to the oil cylinder, and it is guaranteed that the oil cylinder can work continuously; therefore, the working reliability of the hydraulic system is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic control systems, in particular to an oil cylinder emergency control system. Background Art

[0002] Accumulators and cylinders play a vital role in hydraulic systems, and the normal transmission of hydraulic oil between the accumulator and the cylinder through the hydraulic system is the prerequisite for ensuring the normal operation of the cylinder. At present, the hydraulic oil transmission methods on the market are all single-mode. If there is a problem with one of the hydraulic mechanisms, the cylinder will not work properly, causing the entire hydraulic system to be paralyzed.

[0003] Therefore, how to design an oil cylinder emergency control system and improve the working reliability of the hydraulic system is a technical problem that technical personnel in this field need to solve urgently. Utility Model Content

[0004] The purpose of the utility model is to provide an oil cylinder emergency control system in view of the defects and shortcomings in the prior art. By arranging a manual control valve in parallel with a hydraulically controlled one-way valve, when the hydraulically controlled one-way valve fails, the oil circuit between the accumulator and the oil cylinder is connected through the manual control valve, so that the oil cylinder can work normally, thereby improving the working reliability of the hydraulic system.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] The utility model provides an oil cylinder emergency control system, comprising an accumulator and an oil cylinder connected to the accumulator, a pipeline connected to the accumulator and the oil cylinder is provided with a control component for opening and closing the pipeline, the control component comprises a hydraulically controlled one-way valve and a manual control valve capable of bidirectional flow of oil between the accumulator and the oil cylinder, and the hydraulically controlled one-way valve and the manual control valve are arranged in parallel.

[0007] Preferably, the manual control valve is a high-pressure ball valve.

[0008] Preferably, a first solenoid valve is provided on the control oil circuit of the hydraulically controlled one-way valve to control the opening and closing of the hydraulically controlled one-way valve.

[0009] Preferably, a first overflow valve is further provided on the control oil circuit of the hydraulically controlled one-way valve, and the first overflow valve is respectively connected with the oil inlet circuit and the oil discharge circuit of the hydraulically controlled one-way valve.

[0010] Preferably, the cylinder emergency control system also includes an oil filling circuit connected to the accumulator, the oil filling circuit is connected to the accumulator and the cylinder through a directional valve, the directional valve includes a valve core capable of moving up and down, an oil filling port connected to an oil supply tank, a first oil outlet connected to the accumulator and a second oil outlet connected to the cylinder, a through oil circuit transversely passing through the valve core is opened inside the valve core, and the position of the valve core in the directional valve is changed to connect the first oil outlet, the oil filling port and the second oil outlet or to connect the first oil outlet, the through oil circuit and the second oil outlet.

[0011] Preferably, the oil filling circuit is also provided with a pressure valve for adjusting the oil filling pressure.

[0012] Preferably, a second solenoid valve is installed on the valve cover of the pressure valve to control the opening and closing of the pressure valve.

[0013] Preferably, a second overflow valve is further provided between the pressure valve and the second solenoid valve, and the second overflow valve is connected to the oil inlet and return oil passages of the pressure valve.

[0014] Preferably, an oil inlet control stop valve, an oil discharge control stop valve and a third overflow valve are provided on the pipeline connecting the accumulator and the first oil outlet, and the oil inlet control stop valve, the oil discharge control stop valve and the third overflow valve are arranged in parallel.

[0015] Compared with the prior art, the utility model has achieved the following technical effects:

[0016] 1. The utility model provides a manual control valve in parallel with the hydraulically controlled one-way valve. When the hydraulically controlled one-way valve fails, the oil circuit between the accumulator and the oil cylinder is connected through the manual control valve, so that the oil cylinder can work normally, thereby improving the working reliability of the hydraulic system.

[0017] Compared with the prior art, other technical solutions of this application have achieved the following technical effects:

[0018] 2. The utility model sets a directional valve. When the oil pressure pumped out by the second oil pump is stable, the directional valve is opened to allow the second oil pump to charge the accumulator while supplying oil to the oil cylinder. When the oil pressure pumped out by the second oil pump changes, the directional valve is closed. At this time, oil is supplied to the oil cylinder through the accumulator, ensuring that the oil cylinder can work continuously, thereby further improving the working reliability of the hydraulic system. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0020] Figure 1 It is the overall structural diagram of the oil cylinder emergency control system.

[0021] Among them, 1. accumulator; 2. oil cylinder; 3. hydraulically controlled one-way valve; 4. manual control valve; 5. first solenoid valve; 6. first oil pump; 7. first overflow valve; 8. oil tank; 9. first return oil tank; 10. directional valve; 11. second valve core; 12. oil filling port; 13. first oil outlet; 14. second oil outlet; 15. through oil circuit; 16. second oil pump; 17. pressure valve; 18. second solenoid valve; 19. second overflow valve; 20. oil inlet control stop valve; 21. oil discharge control stop valve; 22. third overflow valve; 23. second return oil tank. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0024] like Figure 1As shown, the utility model provides an oil cylinder emergency control system, including an accumulator 1 and an oil cylinder 2 connected to the accumulator 1, and a control component for opening and closing the pipeline is provided on the pipeline connecting the accumulator 1 and the oil cylinder 2, and the control component includes a hydraulically controlled one-way valve 3 and a manual control valve 4 that can make the oil flow in both directions between the accumulator 1 and the oil cylinder 2, and the hydraulically controlled one-way valve 3 and the manual control valve 4 are arranged in parallel. When the hydraulically controlled one-way valve 3 can be used normally, the manual control valve 4 is closed, so that the oil flows in both directions between the accumulator 1 and the oil cylinder 2 through the hydraulically controlled one-way valve 3. When the hydraulically controlled one-way valve 3 fails, the manual control valve 4 is opened, so that the oil flows in both directions between the accumulator 1 and the oil cylinder 2 through the manual control valve 4, thereby ensuring that the hydraulic system can work normally and improving the working reliability of the oil cylinder emergency control system. Among them, the manual control valve 4 can be a gate valve, a butterfly valve, a ball valve, a stop valve, etc. As a preferred embodiment of the present application, the manual control valve 4 is a high-pressure ball valve.

[0025] The control oil circuit of the hydraulically controlled one-way valve 3 is provided with a first solenoid valve 5 and a first oil pump 6, and the opening and closing of the hydraulically controlled one-way valve 3 is controlled by the first solenoid valve 5. Specifically, when the first solenoid valve 5 is powered on, the hydraulically controlled one-way valve 3 is in an open state, and the oil can flow from the accumulator 1 to the oil cylinder 2. When the first solenoid valve 5 is powered off, the hydraulically controlled one-way valve 3 is in a closed state, and the oil cannot flow from the accumulator 1 to the oil cylinder 2, and can only flow from the oil cylinder 2 to the accumulator 1. The control oil circuit of the hydraulically controlled one-way valve 3 is also provided with a first overflow valve 7, which is respectively connected to the oil inlet oil circuit and the oil discharge oil circuit of the hydraulically controlled one-way valve 3 to adjust the flow and pressure of the oil inlet oil circuit and the oil discharge oil circuit of the hydraulically controlled one-way valve 3 to ensure that the hydraulic system is not damaged by overload. As a preferred embodiment of the present application, the oil inlet oil circuit of the hydraulically controlled one-way valve 3 is connected to the oil tank 8 through the first oil pump 6, and the oil discharge oil circuit of the hydraulically controlled one-way valve 3 is connected to the first oil return tank 9.

[0026] The cylinder emergency control system also includes an oil filling circuit connected to the accumulator 1, and the oil filling circuit is connected to the accumulator 1 and the cylinder 2 through a directional valve 10. The directional valve 10 includes a second valve core 11 capable of moving up and down, an oil filling port 12 connected to the oil supply tank 8, a first oil outlet 13 connected to the accumulator 1, and a second oil outlet 14 connected to the cylinder 2. A through oil circuit 15 that transversely penetrates the valve core is opened inside the second valve core 11. The position of the second valve core 11 in the directional valve 10 is changed to connect the first oil outlet 13, the oil filling port 12 and the second oil outlet 14, or to connect the first oil outlet 13, the through oil circuit 15 and the second oil outlet 14. The oil filling port 12 is connected to the oil tank 8 through the second oil pump 16. When in use, the second oil pump 16 is turned on, and hydraulic oil is injected into the oil filling port 12 to push the second valve core 11 to move upward. At this time, the first oil outlet 13 and the second oil outlet 14 are respectively connected to the oil filling port 12; the second oil pump 16 is turned off, and the second valve core 11 is reset to block the oil filling port 12 under the action of the spring. At this time, the first oil outlet 13 and the second oil outlet 14 are respectively connected to the through oil path 15.

[0027] A pressure valve 17 for adjusting the filling oil pressure is also provided on the filling oil circuit. A second solenoid valve 18 is installed on the valve cover of the pressure valve 17. The opening and closing of the pressure valve 17 is controlled by the second solenoid valve 18. When the second solenoid valve 18 is energized, the pressure valve 17 is in a closed state, and all the oil pumped out by the second oil pump 16 flows into the oil filling port 12; when the second solenoid valve 18 is de-energized, the pressure valve 17 is in an open state, and part of the oil pumped out by the second oil pump 16 flows out through the pressure valve 17 to unload, and the remaining part flows into the oil filling port 12, thereby adjusting the load of the system.

[0028] A second relief valve 19 is also provided between the pressure valve 17 and the second solenoid valve 18. The second relief valve 19 is connected to the oil inlet and return oil circuits of the pressure valve 17. When the pressure at the pressure valve 17 exceeds the normal value, the hydraulic oil flows out through the second relief valve 19 to adjust the pressure at the pressure valve 17. Since the oil inlet and return oil circuits of the pressure valve 17 share a pipeline, this pipeline is called the oil inlet and return oil circuits of the pressure valve 17.

[0029] An oil inlet control stop valve 20, an oil discharge control stop valve 21 and a third overflow valve 22 are provided on the pipeline connecting the accumulator 1 and the first oil outlet 13. The oil inlet control stop valve 20, the oil discharge control stop valve 21 and the third overflow valve 22 are arranged in parallel, and the oil discharge control stop valve 21 and the third overflow valve 22 are respectively connected to the second oil return tank 23.

[0030] During normal operation, the M1 and M2 motors rotate, the first oil pump 6 and the second oil pump 16 start, the manual control valve 4 is in a closed state, the second solenoid valve 18 on the pressure valve 17 is energized, and the oil pumped out by the second oil pump 16 enters the accumulator 1 through the directional valve 10. The accumulator 1 accumulates energy. After the pressure in the accumulator 1 reaches the set pressure, the M1 motor stops. At this time, the directional valve 10 is switched to a state where the first oil outlet 13, the through oil path 15 and the second oil outlet 14 are connected under the action of the reset spring. At this time, the first solenoid valve 5 is energized, and the oil in the accumulator 1 enters the oil cylinder 2 through the hydraulically controlled one-way valve 3 to supply oil to the oil cylinder 2. When the oil in the oil cylinder 2 needs to flow back to the accumulator 1, the first solenoid valve 5 is controlled to be de-energized. At this time, the oil in the accumulator 1 cannot flow into the oil cylinder 2, and the hydraulic oil can only enter the accumulator 1 through the oil cylinder 2.

[0031] When the hydraulically controlled one-way valve 3 is damaged and cannot be opened normally, and the cylinder 2 still needs to operate normally, the oil circuit between the accumulator 1 and the cylinder 2 is controlled by the manual control valve 4. Specifically, when the oil in the accumulator 1 does not need to enter the cylinder 2, the high-pressure ball valve is closed to cut off the oil circuit between the accumulator 1 and the cylinder 2; when the accumulator 1 needs to supply oil to the cylinder 2 or the oil in the cylinder 2 needs to return to the accumulator 1, the high-pressure ball valve is opened to connect the oil circuit between the accumulator 1 and the cylinder 2.

[0032] It should be noted that, for those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, so it is intended to include all changes within the meaning and scope of the equivalent elements of the claims in the present invention, and any figure mark in the claims should not be regarded as limiting the claims involved.

Claims

1. A cylinder emergency control system, characterized in that: It includes an accumulator and an oil cylinder connected to the accumulator. The pipeline connecting the accumulator and the oil cylinder is provided with a control component for opening and closing the pipeline. The control component includes a hydraulically controlled one-way valve and a manual control valve capable of bidirectional flow of oil between the accumulator and the oil cylinder. The hydraulically controlled one-way valve and the manual control valve are arranged in parallel.

2. The oil cylinder emergency control system according to claim 1, characterized in that: The manual control valve is a high-pressure ball valve.

3. The oil cylinder emergency control system according to claim 1 or 2, characterized in that: A first solenoid valve is provided on the control oil circuit of the hydraulically controlled one-way valve to control the opening and closing of the hydraulically controlled one-way valve.

4. The oil cylinder emergency control system according to claim 3, characterized in that: A first overflow valve is also provided on the control oil circuit of the hydraulically controlled one-way valve, and the first overflow valve is respectively connected with the oil inlet circuit and the oil discharge circuit of the hydraulically controlled one-way valve.

5. The oil cylinder emergency control system according to claim 1 or 2, characterized in that: The cylinder emergency control system also includes an oil filling circuit connected to the accumulator, and the oil filling circuit is connected to the accumulator and the cylinder through a directional valve. The directional valve includes a valve core that can move up and down, an oil filling port connected to an oil supply tank, a first oil outlet connected to the accumulator, and a second oil outlet connected to the cylinder. A through oil circuit that transversely passes through the valve core is opened inside the valve core, and the position of the valve core in the directional valve is changed to connect the first oil outlet, the oil filling port and the second oil outlet, or to connect the first oil outlet, the through oil circuit and the second oil outlet.

6. The oil cylinder emergency control system according to claim 5, characterized in that: The oil filling circuit is also provided with a pressure valve for adjusting the oil filling pressure.

7. The oil cylinder emergency control system according to claim 6, characterized in that: A second solenoid valve is installed on the valve cover of the pressure valve to control the opening and closing of the pressure valve.

8. The oil cylinder emergency control system according to claim 7, characterized in that: A second overflow valve is also provided between the pressure valve and the second solenoid valve, and the second overflow valve is connected with the oil inlet and return oil passages of the pressure valve.

9. The oil cylinder emergency control system according to claim 5, characterized in that: An oil inlet control stop valve, an oil discharge control stop valve and a third overflow valve are arranged on the pipeline connecting the accumulator and the first oil outlet, and the oil inlet control stop valve, the oil discharge control stop valve and the third overflow valve are arranged in parallel.

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