Hydraulic system for automatic zinc stripping machine
By using load-sensitive plunger pumps and shuttle valves in the automatic zinc stripper hydraulic system, the flow and pressure matching is achieved, and the energy waste problem in the existing hydraulic system is solved and the efficiency and safety of the system is improved.
Patent Information
- Application Number
- CN202510131474.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-06
- Publication Date
- 2025-05-30
AI Technical Summary
In the hydraulic system of existing automatic zinc strippers, the excess flow must be returned to the oil tank at working pressure through the relief valve or other valves, resulting in large heat generation of the system and wasted energy.
A hydraulic system consisting of a load-sensitive plunger pump, shuttle valve, load-sensitive multi-channel valve I and load-sensitive multi-channel valve II is adopted. Through the cooperation of the load-sensitive plunger pump and shuttle valve, the flow rate and pressure are matched to reduce unnecessary energy consumption.
It effectively reduces heat generation and power consumption of hydraulic systems, improves working efficiency, and reduces the risk of oil leakage.
Smart Images
Figure CN120062182A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the field of electrowinning equipment for hydrometallurgy, and particularly to a hydraulic system for an automatic zinc stripping machine. Background Art
[0002] An automatic zinc stripping device is an automated device used for the zinc stripping operation of cathode zinc plates during the zinc electrowinning process in the non-ferrous metal hydrometallurgy industry. It can automatically strip electrowon zinc from cathode aluminum plates, replacing the traditional manual zinc stripping method, and greatly improving production efficiency and zinc stripping quality.
[0003] With the increasing scale of large lead-zinc enterprises and the increasing complexity of ore sources, the difficulty of zinc stripping has increased. The existing manual operation methods have high labor intensity, low work efficiency, poor working environment, and low safety factor. To save labor, improve productivity, and improve working conditions, major zinc smelting enterprises and equipment manufacturing enterprises around the world have actively developed and applied mechanized and automated zinc stripping technologies, solving the mechanization and automation problems of the main processes of zinc stripping operations, including the zinc sheet stripping process and the cathode plate brushing process, and initially realizing the mechanization and automation of zinc stripping operations.
[0004] Currently, for large plate zinc stripping units introduced from abroad or domestically produced, their hydraulic systems usually use fixed displacement pumps plus relief valves plus throttle valves to adjust the operating speed of the actuators. At this time, the excess flow must return to the oil tank through the relief valve or other valves at the working pressure, inevitably causing a large amount of heat generation in the system and resulting in energy waste. In addition, traditional throttle valves and solenoid directional control valves basically exist in the form of stacked valves, and there is also a risk of oil leakage when the number of stacked valves is too large. Summary of the Invention
[0005] To solve the technical problem that in the hydraulic system of the existing zinc stripping machine, the excess flow must return to the oil tank through the relief valve or other valves at the working pressure, resulting in a large amount of heat generation in the system and energy waste, the present invention provides a hydraulic system for an automatic zinc stripping machine.
[0006] A hydraulic system for an automatic zinc stripping machine, comprising a load-sensitive piston pump, a shuttle valve, a load-sensitive multi-way valve I, a load-sensitive multi-way valve II, and an oil tank; an oil outlet of the oil tank is connected to an oil inlet of the load-sensitive piston pump; an oil outlet of the load-sensitive piston pump is connected to an oil inlet of the load-sensitive multi-way valve I and an oil inlet of the load-sensitive multi-way valve II; an oil outlet of the first-stage valve of the load-sensitive multi-way valve I is connected to the oil tank, and other stage valves are connected to a plurality of actuators; an oil outlet of the first-stage valve of the load-sensitive multi-way valve II is connected to the oil tank, and other stage valves are connected to a plurality of actuators; two oil inlets of the shuttle valve are respectively connected to a load-sensitive port of the load-sensitive multi-way valve I and a load-sensitive port of the load-sensitive multi-way valve II; an oil outlet of the shuttle valve is connected to a control oil port of the load-sensitive piston pump.
[0007] In a preferred embodiment of the hydraulic system for an automatic zinc stripping machine provided by the present invention, the other stage valves of the load-sensitive multi-way valve I excluding the first-stage valve are four working stage valves; the plurality of actuators connected to the load-sensitive multi-way valve I include a pre-stripping side knife lifting oil cylinder, a pre-stripping middle knife lifting oil cylinder, a pre-stripping side closing knife oil cylinder, and a pre-stripping middle closing knife oil cylinder; each working stage valve of the load-sensitive multi-way valve I is connected to one of the pre-stripping side knife lifting oil cylinder, the pre-stripping middle knife lifting oil cylinder, the pre-stripping side closing knife oil cylinder, and the pre-stripping middle closing knife oil cylinder.
[0008] In a preferred embodiment of the hydraulic system for an automatic zinc stripping machine provided by the present invention, the other stage valves of the load-sensitive multi-way valve II excluding the first-stage valve are five working stage valves; the plurality of actuators connected to the load-sensitive multi-way valve II include a transfer push-pull oil cylinder, a transfer lifting oil cylinder, a transfer centering oil cylinder, a main stripping closing knife oil cylinder, and a main stripping hydraulic motor; each working stage valve of the load-sensitive multi-way valve II is connected to one of the transfer push-pull oil cylinder, the transfer lifting oil cylinder, the transfer centering oil cylinder, the main stripping closing knife oil cylinder, and the main stripping hydraulic motor.
[0009] In a preferred embodiment of the hydraulic system for an automatic zinc stripping machine provided by the present invention, it includes a pre-stripping hydraulic circuit and a main stripping hydraulic circuit; the pre-stripping side knife lifting oil cylinder, the pre-stripping middle knife lifting oil cylinder, the pre-stripping side closing knife oil cylinder, and the pre-stripping middle closing knife oil cylinder are actuators in the pre-stripping hydraulic circuit, and the load-sensitive multi-way valve I is a control element in the pre-stripping hydraulic circuit; the transfer push-pull oil cylinder, the transfer lifting oil cylinder, the transfer centering oil cylinder, the main stripping closing knife oil cylinder, and the main stripping hydraulic motor are actuators in the main stripping hydraulic circuit, and the load-sensitive multi-way valve II is a control element in the main stripping hydraulic circuit.
[0010] Compared with the prior art, the hydraulic system for an automatic zinc stripping machine provided by the present invention uses a load-sensing piston pump to provide a pressure oil source for two hydraulic circuits. When the two hydraulic circuits work simultaneously, the load-sensing piston pump can feedback the larger load pressure to the control oil port of the load-sensing piston pump through the shuttle valve, thereby playing a role in flow regulation. During this process, the load-sensing piston pump only outputs the flow rate and pressure required by the actuators, making the flow rate and pressure continuously match the power demand, generating less heat and consuming less power, and improving work efficiency. Brief Description of the Drawings
[0011] Figure 1 is the hydraulic principle block diagram of a hydraulic system for an automatic zinc stripping machine provided by the present invention. Detailed Description of the Preferred Embodiments
[0012] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.
[0013] Please refer to Figure 1 , which is the hydraulic principle block diagram of a hydraulic system for an automatic zinc stripping machine provided by the present invention.
[0014] The hydraulic system for an automatic zinc stripping machine includes a load-sensing piston pump 1, a shuttle valve 2, a load-sensing multi-way valve I 3, a load-sensing multi-way valve II 4, a pre-stripping side knife lifting cylinder 5, a pre-stripping middle knife lifting cylinder 6, a pre-stripping side closing knife cylinder 7, a pre-stripping middle closing knife cylinder 8, a transfer push-pull cylinder 9, a transfer lifting cylinder 10, a transfer centering cylinder 11, a main stripping closing knife cylinder 12, a main stripping hydraulic motor 13, and an oil tank 14.
[0015] The oil outlet of the oil tank 14 is connected to the oil inlet of the load-sensing piston pump 1. The oil outlet of the load-sensing piston pump 1 is connected to the oil inlet of the load-sensing multi-way valve I 3 and the oil inlet of the load-sensing multi-way valve II 4.
[0016] The load-sensing multi-way valve I 3 includes a first-stage valve and four groups of working-stage valves. The oil outlet of the first-stage valve in the load-sensing multi-way valve I 3 is connected to the oil tank 14; the four groups of working-stage valves of the load-sensing multi-way valve I 3 are respectively connected to one of the pre-stripping side knife lifting cylinder 5, the pre-stripping middle knife lifting cylinder 6, the pre-stripping side closing knife cylinder 7, and the pre-stripping middle closing knife cylinder 8.
[0017] The load-sensitive multi-way valve II 4 includes a first-stage valve and five groups of working-stage valves. The oil outlet of the first-stage valve in the load-sensitive multi-way valve II 4 is connected to the fuel tank 14; the five groups of working-stage valves of the load-sensitive multi-way valve II 4 are respectively connected to one of the transfer push-pull cylinder 9, the transfer lifting cylinder 10, the transfer centering cylinder 11, the main stripping knife cylinder 12, and the main stripping hydraulic motor 13.
[0018] The two oil inlets of the shuttle valve 2 are respectively connected to the load-sensitive port of the load-sensitive multi-way valve I 3 and the load-sensitive port of the load-sensitive multi-way valve II 4; the oil outlet of the shuttle valve 2 is connected to the control oil port of the load-sensitive piston pump 1.
[0019] This hydraulic system for an automatic zinc stripping machine includes a pre-stripping hydraulic circuit and a main stripping hydraulic circuit. In the pre-stripping hydraulic circuit, the actuators are the pre-stripping side knife lifting cylinder 5, the pre-stripping middle knife lifting cylinder 6, the pre-stripping side closing knife cylinder 7, and the pre-stripping middle closing knife cylinder 8, and the control element is the load-sensitive multi-way valve I 3.
[0020] In the main stripping hydraulic circuit, the actuators are the transfer push-pull cylinder 9, the transfer lifting cylinder 10, the transfer centering cylinder 11, the main stripping closing knife cylinder 12, and the main stripping hydraulic motor 13, and the control element is the load-sensitive multi-way valve II 4.
[0021] During specific implementation, the load-sensitive piston pump 1 sucks oil from the fuel tank 14, and the oil is distributed to the load-sensitive multi-way valve I 3 and the load-sensitive multi-way valve II 4. If none of the actuators, namely the pre-stripping side knife lifting cylinder 5, the pre-stripping middle knife lifting cylinder 6, the pre-stripping side closing knife cylinder 7, the pre-stripping middle closing knife cylinder 8, the transfer push-pull cylinder 9, the transfer lifting cylinder 10, the transfer centering cylinder 11, the main stripping closing knife cylinder 12, and the main stripping hydraulic motor 13, are working, the load-sensitive piston pump 1 maintains a standby state, and it only outputs a very low standby pressure and an almost zero displacement; if one actuator is working or multiple actuators are working simultaneously, the maximum load pressure of the system can be fed back to the control oil port of the load-sensitive piston pump 1 through the shuttle valve 2, so as to play a flow regulation role. During this process, the load-sensitive piston pump 1 only outputs the flow and pressure required by the actuators.
[0022] The above are only the embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structure or equivalent process transformation made using the content of the specification of the present invention, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present invention.
Claims
1. A hydraulic system for an automatic zinc stripping machine, characterized in that: It comprises a load-sensitive plunger pump, a shuttle valve, a load-sensitive multi-way valve I, a load-sensitive multi-way valve II and an oil tank; the oil outlet of the oil tank is connected to the oil inlet of the load-sensitive plunger pump; the oil outlet of the load-sensitive plunger pump is connected to the oil inlet of the load-sensitive multi-way valve I and the oil inlet of the load-sensitive multi-way valve II; the oil outlet of the first connecting valve of the load-sensitive multi-way valve I is connected to the oil tank, and the other connecting valves are connected to a plurality of actuators; the oil outlet of the first connecting valve of the load-sensitive multi-way valve II is connected to the oil tank, and the other connecting valves are connected to a plurality of actuators; the two oil inlets of the shuttle valve are respectively connected to the load-sensitive port of the load-sensitive multi-way valve I and the load-sensitive port of the load-sensitive multi-way valve II; the oil outlet of the shuttle valve is connected to the control oil port of the load-sensitive plunger pump.
2. A hydraulic system for an automatic zinc stripping machine according to claim 1, characterized in that: The load-sensitive multi-way valve I, excluding the first valve, has four groups of working valves. The multiple actuators connected to the load-sensitive multi-way valve I include a pre-stripping side knife lifting cylinder, a pre-stripping intermediate knife lifting cylinder, a pre-stripping side knife closing cylinder and a pre-stripping intermediate knife closing cylinder. Each group of working valves of the load-sensitive multi-way valve I is connected to one of the pre-stripping side knife lifting cylinder, the pre-stripping intermediate knife lifting cylinder, the pre-stripping side knife closing cylinder and the pre-stripping intermediate knife closing cylinder.
3. A hydraulic system for an automatic zinc stripping machine according to claim 2, characterized in that: The load-sensitive multi-way valve II does not include the other coupling valves of the first coupling valve, which are five groups of working coupling valves; the multiple actuators connected to the load-sensitive multi-way valve II include a transfer push-pull cylinder, a transfer lifting cylinder, a transfer centering cylinder, a main stripping knife cylinder and a main stripping hydraulic motor; each group of working coupling valves of the load-sensitive multi-way valve II is connected to one of the transfer push-pull cylinder, the transfer lifting cylinder, the transfer centering cylinder, the main stripping knife cylinder and the main stripping hydraulic motor.
4. A hydraulic system for an automatic zinc stripping machine according to claim 3, characterized in that: It comprises a pre-stripping hydraulic circuit and a main stripping hydraulic circuit; the pre-stripping side knife lifting cylinder, the pre-stripping middle knife lifting cylinder, the pre-stripping side knife closing cylinder and the pre-stripping middle knife closing cylinder are the actuators in the pre-stripping hydraulic circuit, and the load-sensitive multi-way valve I is the control element in the pre-stripping hydraulic circuit; the transfer push-pull cylinder, the transfer lifting cylinder, the transfer centering cylinder, the main stripping knife cylinder and the main stripping hydraulic motor are the actuators in the main stripping hydraulic circuit, and the load-sensitive multi-way valve II is the control element in the main stripping hydraulic circuit.