Novel double-flow output hydraulic system

Abstract

The invention provides a novel double-flow output hydraulic system, and belongs to the technical field of hydraulic systems of multi-cylinder cone crushers. Comprising a ball valve and an oil tank, the ball valve and the oil tank are connected through an oil way, the ball valve is connected with a small pump through an oil way, the ball valve is connected with a large pump through an oil way, the small pump and the large pump are connected with a motor through pump shafts, and the large pump is connected with a first one-way valve through an oil way. The first differential pressure sensing valve is connected with a first damping hole through an oil path, the first damping hole is connected with a first safety valve through an oil path, the first damping hole is connected with a first electromagnetic valve through an oil path, the large pump is connected with a second differential pressure sensing valve through an oil path, and the second differential pressure sensing valve is connected with a second damping hole through an oil path. The second damping hole is connected with a second safety valve through an oil way and connected with a second electromagnetic valve through an oil way. The multi-cylinder cone crusher has the beneficial effect that the requirements of the large multi-cylinder cone crusher for different flow output functions are met.

Description

Technical Field

[0001] The invention belongs to the technical field of hydraulic systems of multi-cylinder cone crushers, and in particular relates to a novel dual-flow output hydraulic system. Background Art

[0002] The multi-cylinder cone crusher used in the mining, building materials and other industries adjusts the discharge port by driving the hydraulic motor through the hydraulic system to drive the fixed cone to rise or fall. When the crusher is working normally, the discharge port is generally fixed. After the crusher has been working for a period of time, as the fixed cone lining and the movable cone lining are worn, the actual discharge port size of the crusher will become larger, and the product particle size cannot meet the requirements of the production process. In order to make the product particle size meet the requirements of the production process, it is necessary to reduce the discharge port to compensate for the wear of the lining. In order to accurately control the size of the discharge port, the output flow of the hydraulic system cannot be too large, otherwise the crusher discharge port may overshoot and it is difficult to accurately control the size of the discharge port. A fixed cone liner is installed on the inside of the fixed cone. The fixed cone liner is a wear part. When the fixed cone liner is worn to a certain extent, it is necessary to replace it with a new fixed cone liner. At this time, the hydraulic system needs to output a larger flow rate to quickly drive the hydraulic motor to rotate, so as to quickly rotate the fixed cone out. After the fixed cone liner is replaced, the hydraulic system also needs to output a larger flow rate to quickly drive the hydraulic motor to rotate in the opposite direction, so as to quickly rotate the fixed cone in, so as to achieve the purpose of quickly disassembling and installing the fixed cone.

[0003] The hydraulic systems in the prior art cannot adjust the output flow rate according to the functional requirements, have a single structure and a small application range. Therefore, a new dual-flow output hydraulic system is proposed to solve the above problems. Summary of the invention

[0004] The technical problem to be solved by the present invention is that the output flow cannot be adjusted according to functional requirements. In view of the shortcomings of the prior art, a novel dual-flow output hydraulic system is provided.

[0005] To solve the above technical problems, the technical solution adopted by the present invention is: a novel dual-flow output hydraulic system, including a ball valve and an oil tank, the ball valve and the oil tank are connected through an oil circuit, the ball valve is connected to a small pump through the oil circuit, the ball valve is connected to a large pump through the oil circuit, the small pump and the large pump are connected to a motor through a pump shaft, the large pump is connected to a first one-way valve through the oil circuit, the small pump is connected to a No. 1 pressure differential sensing valve through the oil circuit, the No. 1 pressure differential sensing valve is connected to a first damping hole through the oil circuit, the first damping hole is connected to a first safety valve through the oil circuit, the first damping hole is connected to a first solenoid valve through the oil circuit, the large pump is connected to a No. 2 pressure differential sensing valve through the oil circuit, the No. 2 pressure differential sensing valve is connected to a second damping hole through the oil circuit, the second damping hole is connected to a second safety valve through the oil circuit, the second damping hole is connected to a second solenoid valve through the oil circuit, the first one-way valve is connected to a filter through the oil circuit, and the filter is connected to the second one-way valve through the oil circuit.

[0006] Further, the first one-way valve is connected to the first differential pressure sensing valve and the second differential pressure sensing valve respectively through oil circuits.

[0007] Furthermore, the second one-way valve is connected to an external actuator through an oil circuit.

[0008] Furthermore, the first one-way valve, the first differential pressure sensing valve, the second differential pressure sensing valve, the first damping hole, the first safety valve, the first solenoid valve, the second damping hole and the second safety valve are all integrated together using a threaded cartridge valve structure.

[0009] Furthermore, the first solenoid valve and the second solenoid valve are both electrically connected to a PLC control system.

[0010] Furthermore, the small pump and the large pump both form a circuit. When the second solenoid valve is energized, the first oil port of the second solenoid valve is connected to the second oil port. The maximum working pressures of the small pump circuit and the large pump circuit are both controlled by the second safety valve.

[0011] Furthermore, the second differential pressure sensing valve, the second safety valve and the second solenoid valve are all connected to the oil tank through an oil circuit.

[0012] Furthermore, the No. 1 pressure differential sensing valve is connected to the first solenoid valve through a loop, and the No. 1 pressure differential sensing valve is connected to the oil tank through an oil circuit.

[0013] Furthermore, a junction P3 is provided between the small pump circuit and the large pump circuit, and the junction P3 is connected to the filter through an oil circuit.

[0014] Furthermore, when the second solenoid valve is powered off, the first oil port of the second solenoid valve is disconnected from the second oil port, and the maximum pressure of the circuit outputted by the small pump at a low flow rate is controlled by the first safety valve.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention meets the requirements of large multi-cylinder cone crushers for different flow output functions through the coordinated use of a first solenoid valve, a second solenoid valve, two differential pressure sensing valves, a first damping hole and a second damping hole, and is also applicable to the requirements of other similar working conditions, thereby improving the benefits of large multi-cylinder cone crushers.

[0016] 2. By adopting the threaded cartridge valve structure design for the valve group, the structure is compact and easy to modularize. At the same time, the threaded cartridge valve has strong anti-pollution ability and high sealing reliability. Compared with the traditional installation valve, the threaded cartridge valve will also be cheaper, reducing the production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0018] Figure 1 : Schematic diagram of the overall structure of the present invention; Figure 2 : System diagram of low flow output circuit of the present invention; Figure 3 : High flow output loop system diagram of the present invention; Figure 4 : The working diagram of the large pump and the small pump of the low flow output circuit of the present invention; Figure 5 : Working process diagram of large pump and small pump in high flow output circuit of the present invention Among them, 1. ball valve; 2. small pump; 3. large pump; 4. motor; 5. first one-way valve; 6.1. No. 1 differential pressure sensing valve; 6.2. No. 2 differential pressure sensing valve; 7. first damping hole; 8. first safety valve; 9. first solenoid valve; 10. second damping hole; 11. second safety valve; 12. second solenoid valve; 13. filter; 14. second one-way valve; 15. oil tank. DETAILED DESCRIPTION

[0019] In order to better understand the present invention, the content of the present invention is further clearly described below in conjunction with the embodiments and the accompanying drawings, but the protection content of the present invention is not limited to the following embodiments. In the following description, a large number of specific details are provided to provide a more thorough understanding of the present invention. However, it is obvious to those skilled in the art that the present invention can be implemented without one or more of these details.

[0020] In this embodiment, see Figure 1-5A novel dual-flow output hydraulic system includes a ball valve 1 and an oil tank 15, the ball valve 1 and the oil tank 15 are connected through an oil circuit, the ball valve 1 is connected to a small pump 2 through the oil circuit, the ball valve 1 is connected to a large pump 3 through the oil circuit, the small pump 2 and the large pump 3 are connected to a motor 4 through a pump shaft, the large pump 3 is connected to a first check valve 5 through the oil circuit, the small pump 2 is connected to a No. 1 pressure differential sensing valve 6.1 through the oil circuit, the No. 1 pressure differential sensing valve 6.1 is connected to a first damping hole 7 through the oil circuit, the first damping hole 7 is connected to a first safety valve 8 through the oil circuit, the first damping hole 7 is connected to a first solenoid valve 9 through the oil circuit, and the large pump 3 is connected to No. 2 differential pressure sensing valve 6.2, the No. 2 differential pressure sensing valve 6.2 is connected to the second damping hole 10 through the oil circuit, the second damping hole 10 is connected to the second safety valve 11 through the oil circuit, the second damping hole 10 is connected to the second solenoid valve 12 through the oil circuit, the first one-way valve 5 is connected to the filter 13 through the oil circuit, the filter 13 is connected to the second one-way valve 14 through the oil circuit, the small pump 2 and the large pump 3 both form a loop, and when the second solenoid valve 12 is energized, the first oil port T3 of the second solenoid valve 12 is connected to the second oil port T2, and the maximum working pressure of the small pump 2 circuit and the large pump 3 circuit are both controlled by the second safety valve 11.

[0021] It should be noted that the oil in the oil tank 15 needs to be sucked into the oil circuit through the oil suction pipeline ball valve 1 of the pump device, so as to facilitate the delivery of the oil to each oil circuit. At the same time, the first solenoid valve 9 and the second solenoid valve 12 are connected to an external power supply. The circuit connections not involved in the present invention are all prior arts and will not be elaborated in the present invention.

[0022] Technical effect: The hydraulic system has low-flow output function and high-flow output function. The low-flow output function is because all the oil output by the large pump 3 flows back to the oil tank 15 through the No. 2 pressure differential sensing valve 6.2, and only the small pump 2 outputs the flow to the final actuator normally. This function has a low output flow and a high pressure. It is also suitable for multiple functions of the multi-cylinder cone crusher, such as discharge port adjustment, locking circuit pressurization, release circuit pressurization, and crushing chamber cleaning. The high-flow output function is because both the large pump 3 and the small pump 2 can output the flow to the final actuator normally. This function has a high output flow and a low pressure. It is suitable for driving the hydraulic motor to rotate at a faster speed under maintenance conditions, thereby disassembling or installing the fixed cone.

[0023] In this embodiment, the first one-way valve 5 is connected to the No. 1 pressure differential sensing valve 6.1 and the No. 2 pressure differential sensing valve 6.2 through the oil circuit, so that the first one-way valve 5 controls the large pump 3 circuit and the small pump 2 circuit of the high flow output function and the low flow output function.

[0024] Optionally, the second one-way valve 14 is connected to an external actuator through an oil circuit, so that the second one-way valve 14 transmits the pressure-regulated oil to the actuator to facilitate the operation of the actuator.

[0025] It should be added that all the actuators involved in the present invention can be hydraulic motors or cylinders. In the high-flow output function, since the output flow is higher and the pressure is lower, the low pressure can reach up to 8.3MPa, which is suitable for driving the rotation of the hydraulic motor at a faster speed under maintenance conditions.

[0026] Optionally, the first one-way valve 5, the first differential pressure sensing valve 6.1, the second differential pressure sensing valve 6.2, the first damping hole 7, the first safety valve 8, the first solenoid valve 9, the second damping hole 10 and the second safety valve 11 are all integrated together using a threaded cartridge valve structure.

[0027] Technical effect: The valve group adopts the design of threaded cartridge valve structure, which makes the structure compact and convenient for modular design. At the same time, the threaded cartridge valve has strong anti-pollution ability and high sealing reliability. Compared with traditional installation valves, the cost of threaded cartridge valves is also lower. The traditional installation valves are plate valves and stacking valves.

[0028] Optionally, the second solenoid valve 12 is electrically connected to the PLC control system, so that the pressure sensor in the hydraulic system outputs a signal to the PLC control system, so that the PLC control system controls the second solenoid valve 12 to cut off power, so that the second solenoid valve 12 automatically switches to a low flow output function, so that the circuit can continue to be pressurized to the pressure setting value 2 of the pressure sensor, and the pressure setting value 2 cannot exceed the pressure setting value of the first safety valve 8.

[0029] Optionally, the No. 2 pressure differential sensing valve 6.2, the second safety valve 11 and the second solenoid valve 12 are all connected to the oil tank 15 through an oil circuit, the No. 1 pressure differential sensing valve 6.1 is connected to the first solenoid valve 9 through a loop, and the No. 1 pressure differential sensing valve 6.1 is connected to the oil tank 15 through an oil circuit. The purpose is to enable part of the pilot oil to flow back to the oil tank 15 through the oil circuit when the large pump 3 circuit is working, thereby avoiding waste of oil, allowing the oil to be recycled and saving resources.

[0030] Optionally, a confluence port P3 is provided between the circuit of the small pump 2 and the circuit of the large pump 3, and the confluence port P3 is connected to the filter 13 through an oil circuit, and its function is to enable the oil output by the small pump 2 and the large pump 3 to converge at P3 in the high-flow output function, so that the merged oil passes through the filter 13 and the second one-way valve 14 and is finally delivered to the actuator.

[0031] Optionally, the maximum pressure of the circuit of the low-flow output of the small pump 2 is controlled by the first safety valve 8, so that the circuits of the large pump 3 and the small pump 2 can be distinguished, so that the two circuits of the small pump 2 and the large pump 3 can work independently without interfering with each other.

[0032] In addition, in the small pump 2 circuit with low flow output function, the maximum pressure at this time is controlled by the first safety valve 8. When the second solenoid valve 12 is powered off, the first oil port T3 and the second oil port T2 of the second solenoid valve 12 are not connected, and the maximum working pressure is 22MPa. In the large pump 3 circuit with high flow output function, the maximum working pressures in both the large pump 3 circuit and the small pump 2 circuit are controlled by the second safety valve 11, and the maximum working pressure is 8.3MPa.

[0033] Working principle: In the low-flow output function, the first solenoid valve 9 is energized, so that the motor 4 starts, thereby driving the small pump 2 and the large pump 3 to work. At this time, the circuit of the small pump 2: the oil passes through the pump device suction pipeline ball valve 1, the small pump 2, the filter 13 and the second one-way valve 14, and is finally delivered to the actuator. The highest pressure in this circuit is controlled by the second safety valve 11, and the maximum working pressure is 22MPa; in the large pump circuit: the oil passes through the pump device suction pipeline ball valve 1, the large pump 3, and the No. 2 differential pressure sensing valve 6.2, of which part of the pilot oil first passes through the pilot oil circuit of the No. 2 differential pressure sensing valve 6.2, the second damping hole 10, the second solenoid valve 12, and then flows back to the oil tank 15. Because the pilot oil circuit of the No. 2 differential pressure sensing valve 6.2 is connected, the flow of oil causes a pressure difference at both ends of the valve core of the No. 2 differential pressure sensing valve. Push the valve core to open, and then the oil flows back to the oil tank 15 through the No. 2 differential pressure sensing valve 6.2. At this time, the low flow output function is because all the oil output by the large pump 3 flows back to the oil tank 15 through the No. 2 differential pressure sensing valve 6.2, and only the small pump 2 outputs the flow to the final actuator normally. This function outputs a lower flow rate and a higher pressure, which can reach up to 22MPa, and is suitable for multiple functions such as discharge port adjustment, locking circuit pressurization, release circuit, and crushing chamber cleaning of multi-cylinder cone crushers; In the high flow output function, the first solenoid valve 9 and the second solenoid valve 12 are energized, so that the motor 4 starts, driving the small pump 2 and the large pump 3 to work. At this time, the pilot port of the No. 1 differential pressure sensing valve 6.1 in the circuit of the small pump 2 passes through the first damping hole 7, the C1 port and the second solenoid valve 12. At this time, the second solenoid valve 12 is energized, and the P2 and P3 ports are connected, the C2 port, the second damping hole 10, and then connected with the pilot port of the No. 2 differential pressure sensing valve 6.2 in the circuit of the large pump 3; this In the circuit of small pump 2, the oil passes through the ball valve 1 of the pump device oil suction pipeline and small pump 2 to reach the P3 port; in the circuit of large pump 3, the oil passes through the ball valve 1 of the pump device oil suction pipeline, large pump 3, and the first non-return valve 5 to reach the P3 port. The oil output by small pump 2 and large pump 3 merges at the P3 port, and the merged oil passes through the filter 13 and the second non-return valve 14, and is finally delivered to the actuator. Under this function, the maximum working pressure of the circuit of large pump 3 and the circuit of small pump 2 are both controlled by the second safety valve 1. 1 control, the maximum working pressure is 8.3MPa; the high flow output function has a higher output flow and lower pressure because both the large pump 3 and the small pump 2 can output flow to the final actuator normally. At this time, the maximum can reach 8.3MPa. It is suitable for driving the hydraulic motor to rotate at a faster speed under maintenance conditions, so as to disassemble or install the fixed cone. At the same time, this function is also suitable for segmented pressurization of other similar hydraulic circuits: that is, when the circuit pressure is lower than the pressure setting value 8.3MPa of the second safety valve 11, the high flow output function is used for pressurization. When the pressure sensor in the circuit detects that the circuit pressure reaches the pressure setting value - 8.3MPa, the pressure sensor outputs a signal to the PLC control system, and the PLC control system controls the second solenoid valve 12 to cut off the power, that is, automatically switching to the low flow output function, and the circuit can continue to be pressurized to the pressure setting value 2 of the pressure sensor, at which time it does not exceed the pressure setting value of the safety valve 8, that is, 22MPa.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Other modifications or equivalent substitutions made to the technical solution of the present invention by ordinary technicians in the field should be included in the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solution of the present invention.

Claims

1. A new type of dual flow output hydraulic system, characterized in that: The invention comprises a ball valve (1) and an oil tank (15), wherein the ball valve (1) and the oil tank (15) are connected via an oil circuit, the ball valve (1) is connected to a small pump (2) via the oil circuit, the ball valve (1) is connected to a large pump (3) via the oil circuit, the small pump (2) and the large pump (3) are connected to a motor (4) via a pump shaft, the large pump (3) is connected to a first check valve (5) via the oil circuit, the small pump (2) is connected to a No. 1 pressure differential sensing valve (6.1) via the oil circuit, the No. 1 pressure differential sensing valve (6.1) is connected to a first damping hole (7) via the oil circuit, and the first damping hole (7) is connected via the oil circuit. A first safety valve (8) is provided, the first damping hole (7) is connected to a first solenoid valve (9) via an oil circuit, the large pump (3) is connected to a second pressure differential sensing valve (6.2) via an oil circuit, the second pressure differential sensing valve (6.2) is connected to a second damping hole (10) via an oil circuit, the second damping hole (10) is connected to a second safety valve (11) via an oil circuit, the second damping hole (10) is connected to a second solenoid valve (12) via an oil circuit, the first check valve (5) is connected to a filter (13) via an oil circuit, and the filter (13) is connected to a second check valve (14) via an oil circuit.

2. The novel dual flow output hydraulic system as claimed in claim 1, characterized in that: The first one-way valve (5) is respectively connected to the first differential pressure sensing valve (6.1) and the second differential pressure sensing valve (6.2) through oil circuits.

3. The novel dual flow output hydraulic system as claimed in claim 1, characterized in that: The second one-way valve (14) is connected to an external actuator via an oil circuit.

4. The novel dual flow output hydraulic system as claimed in claim 1, characterized in that: The first one-way valve (5), the first differential pressure sensing valve (6.1), the second differential pressure sensing valve (6.2), the first damping orifice (7), the first safety valve (8), the first solenoid valve (9), the second damping orifice (10) and the second safety valve (11) are all integrated together using a threaded cartridge valve structure.

5. The novel dual flow output hydraulic system as claimed in claim 1, characterized in that: The first solenoid valve (9) and the second solenoid valve (12) are both electrically connected to a PLC control system.

6. The novel dual flow output hydraulic system as claimed in claim 1, characterized in that: The small pump (2) and the large pump (3) both form a circuit. When the second solenoid valve (12) is energized, the first oil port (T3) of the second solenoid valve (12) is connected to the second oil port (T2). The maximum working pressure of the circuit of the small pump (2) and the circuit of the large pump (3) are both controlled by the second safety valve (11).

7. The novel dual flow output hydraulic system as claimed in claim 1, characterized in that: The second differential pressure sensing valve (6.2), the second safety valve (11) and the second solenoid valve (12) are all connected to the oil tank (15) via an oil circuit.

8. The novel dual flow output hydraulic system as claimed in claim 1, characterized in that: The first differential pressure sensing valve (6.1) is connected to the first solenoid valve (9) via a loop, and the first differential pressure sensing valve (6.1) is connected to the oil tank (15) via an oil circuit.

9. The novel dual flow output hydraulic system as claimed in claim 6, characterized in that: A junction (P3) is provided between the circuit of the small pump (2) and the circuit of the large pump (3), and the junction (P3) is connected to the filter (13) via an oil circuit.

10. The novel dual flow output hydraulic system as claimed in claim 6, characterized in that: When the second solenoid valve (12) is powered off, the first oil port (T3) of the second solenoid valve (12) is disconnected from the second oil port (T2), and the maximum pressure of the circuit of the low-flow output of the small pump (2) is controlled by the first safety valve (8).

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