Controllable pressing control system adopting energy accumulator for hydraulic machine

Abstract

The utility model relates to the technical field of energy accumulators, in particular to an energy accumulator controllable control system for a hydraulic machine, which comprises a control unit, a hydraulic device, an energy accumulator, a motor oil pump set and a sensor, and the control unit comprises a PLC (programmable logic controller), an energy storage controller, a fault diagnosis device and a monitoring device. The hydraulic device comprises a sliding block / oil cylinder, an oil tank, a control valve, a return cylinder, a speed / displacement detection device and a cartridge valve.

Description

Technical Field

[0001] The utility model relates to the technical field of accumulators, in particular to a control system of a hydraulic machine which is controllable by an accumulator. Background Art

[0002] At present, people in the hydraulic industry have requirements for the working efficiency of hydraulic presses. In order to meet the working efficiency of hydraulic presses, we need to set or require the working speed of hydraulic presses. In industries such as rapid forging and stamping, the working speed of hydraulic presses is particularly high, and the hydraulic presses need to work at high speed and stably. Usually, we will choose to use multiple groups of motor oil pumps to meet their high-speed and stable requirements, but this will cause high costs and occupy a large amount of space. In order to reduce costs and save space, accumulators are usually used to replace a large number of motor oil pump groups, leaving only a small number of motor oil pump groups to achieve the basic movements of the hydraulic press. When the hydraulic press is working, the accumulator is used to assist in achieving the working speed requirements of the hydraulic press. However, there is a very big disadvantage after using accumulators to replace motor oil pump groups. Its working speed cannot be fully controllable or the speed is uneven, resulting in a problem of fast speed in the first half and slow speed in the second half. In order to solve the problem of uncontrollable speed of hydraulic press when using accumulator for pressing, a control system and control method for using accumulator to achieve speed and stroke controllable pressing are proposed and designed, which are used to control the speed and stroke of hydraulic press when using accumulator for pressing, and achieve speed and stroke controllability, while also reducing costs. Utility Model Content

[0003] The utility model aims to solve the problems existing in the prior art and proposes a control system for a hydraulic machine which adopts an accumulator controllable control system.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A control system for a hydraulic press using an accumulator for controllable pressing, comprising a control unit, a hydraulic device, an accumulator, a motor oil pump group and a sensor, wherein the control unit comprises a PLC controller, an accumulator controller, a fault diagnosis device and a monitoring device; the hydraulic device comprises a slider / oil cylinder, an oil tank, a control valve, a return cylinder, a speed / displacement detection device and a cartridge valve; the speed / displacement detection device is connected to the control valve via a detection signal line; the speed / displacement detection device is connected to the slider / oil cylinder via a detection signal line;

[0006] The accumulator is connected to the control valve and the slider / cylinder respectively; the accumulator and the control valve are connected via a detection signal line; the control valve is connected to the PLC controller via the detection signal line; the speed / displacement detection device is connected to the return cylinder to detect the return rate of the return cylinder;

[0007] An oil pipeline one is arranged between the cartridge valve and the return cylinder respectively, and the cartridge valve delivers the hydraulic oil to the return cylinder through the oil pipeline one.

[0008] Furthermore, an oil pipeline 2 is provided between the cartridge valve and the accumulator, and the cartridge valve delivers the hydraulic oil to the accumulator through the oil pipeline 2.

[0009] Furthermore, an oil pipeline three is arranged between the accumulator and the motor oil pump group, the oil pipeline two is connected to the oil pipeline three, and the power supply oil pump group supplies oil to the oil pipeline two through the oil pipeline three.

[0010] Furthermore, an oil pipeline four is provided between the motor oil pump group and the cartridge valve, and the motor oil pump group delivers the hydraulic oil to the cartridge valve through the oil pipeline four.

[0011] Furthermore, an oil pipeline five is provided between the oil tank and the motor oil pump group, and the oil tank delivers the hydraulic oil to the motor oil pump group through the oil pipeline five.

[0012] Furthermore, a connection is established between the PLC controller and the cartridge valve via a control signal circuit.

[0013] Furthermore, the accumulator provides kinetic energy to the slider / cylinder after establishing connection with the slider / cylinder.

[0014] Furthermore, the PLC controller establishes a connection with the accumulator controller via a control signal circuit, and the accumulator controller establishes a connection with the accumulator via a control circuit.

[0015] Furthermore, after the motor oil pump group is connected to the cartridge valve through the oil delivery circuit, the hydraulic oil is delivered to the cartridge valve; the fault diagnosis device is interactively connected with the monitoring device, and the fault diagnosis device feeds back the fault information diagnosed by the system to the monitoring device.

[0016] Compared with the existing technology, the utility model has the following advantages:

[0017] The utility model proposes a control system for a hydraulic press that uses an accumulator to control the speed and stroke by setting the required speed and controlling the discharge of the accumulator. Compared with the traditional hydraulic press driven by an electric motor oil pump, this solution reduces the cost and saves the space occupied by the equipment, and also realizes the controllable speed and stroke when pressing with an accumulator. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is the process framework diagram of the control system in this utility model DETAILED DESCRIPTION

[0019] 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 of 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.

[0020] Embodiment 1, a control system for a hydraulic press using an accumulator for controllable pressing, comprising a control unit, a hydraulic device, an accumulator, a motor oil pump group and a sensor. In this embodiment, the control unit is based on a preset working speed, pressing stroke and working pressure. In addition, the control unit in the control system has an automatic adjustment function, which adjusts the discharge amount of the accumulator according to the data fed back by the sensor to keep the speed and stroke stable. The accumulator is used for filling pressure and releasing pressure of the accumulator to achieve controllable speed and stroke of the hydraulic press. The accumulator achieves controllable discharge amount through the control unit and is used to drive the hydraulic press to perform the pressing process. The motor oil pump group is used to fill and release the accumulator to ensure the normal operation of the hydraulic press. The sensor is used to monitor the position and pressure changes of the hydraulic press, and feeds back the data to the control unit for real-time adjustment. It is also used to detect the working state of the hydraulic press, including parameters such as position and pressure, to ensure the safe operation of the hydraulic press.

[0021] Embodiment 2, the control unit includes a PLC controller, an energy storage controller, a fault diagnosis device and a monitoring device; the hydraulic device includes a slider / cylinder, an oil tank, a control valve, a return cylinder, a speed / displacement detection device, and a cartridge valve; the speed / displacement detection device is connected to the control valve through a detection signal circuit; the speed / displacement detection device is connected to the slider / cylinder through a detection signal circuit.

[0022] Embodiment 3, the accumulator is respectively connected to the control valve and the slider / cylinder; the accumulator and the control valve are connected through a detection signal line; the control valve is connected to the PLC controller through the detection signal line; the speed / displacement detection device is connected to the return cylinder to detect the return rate of the return cylinder; an oil pipeline one is set between the cartridge valve and the return cylinder, and the cartridge valve transports the hydraulic oil to the return cylinder through the oil pipeline one.

[0023] In embodiment 4, an oil pipeline 2 is provided between the cartridge valve and the accumulator, and the cartridge valve delivers the hydraulic oil to the accumulator through the oil pipeline 2; an oil pipeline 3 is provided between the accumulator and the motor oil pump group, and the oil pipeline 2 is connected to the oil pipeline 3, and the power supply oil pump group delivers oil to the oil pipeline 2 through the oil pipeline 3.

[0024] In embodiment 5, an oil pipeline four is provided between the motor oil pump group and the cartridge valve, and the motor oil pump group delivers the hydraulic oil to the cartridge valve through the oil pipeline four.

[0025] In Embodiment 6, an oil pipeline five is provided between the oil tank and the motor oil pump group, and the oil tank delivers the hydraulic oil to the motor oil pump group through the oil pipeline five.

[0026] In Example 7, the PLC controller is connected to the cartridge valve via a control signal circuit; the accumulator is connected to the slider / cylinder to provide kinetic energy to the slider / cylinder.

[0027] In Example 8, the PLC controller establishes a connection with the accumulator controller via a control signal circuit, and the accumulator controller establishes a connection with the accumulator via a control circuit.

[0028] In Example 9, after the motor oil pump group is connected to the cartridge valve through the oil delivery circuit, the hydraulic oil is delivered to the cartridge valve; the fault diagnosis device is interactively connected with the monitoring device, and the fault diagnosis device feeds back the fault information diagnosed by the system to the monitoring device.

[0029] Embodiment 10: A control method for a control system of a hydraulic press using an accumulator for controllable pressing, the method comprising:

[0030] S1, start the PLC controller of the hydraulic press, and the system starts initialization;

[0031] S2. Set the press speed, pressing stroke, working pressure, accumulator filling pressure, and accumulator release pressure on the PLC controller;

[0032] S3, press the pressing button on the hydraulic press, release the accumulator, and drive the hydraulic press slider down at the set speed;

[0033] S4, when reaching the set position, the pressure is released, and a set of motor oil pumps are used to inject hydraulic oil into the return cylinder to drive the slider to return. During the return process, another set of motor oil pumps are used to fill the accumulator with liquid and pressurize it;

[0034] S5. When the slider returns to the set position, it can be pressed again in a cycle.

[0035] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A control system for a hydraulic press using an accumulator for controllable pressing, comprising a control unit, a hydraulic device, an accumulator, a motor oil pump group and a sensor, characterized in that: The control unit includes a PLC controller, an energy storage controller, a fault diagnosis device and a monitoring device; the hydraulic device includes a slider / cylinder, an oil tank, a control valve, a return cylinder, a speed / displacement detection device, and a cartridge valve; the speed / displacement detection device is connected to the control valve via a detection signal line; the speed / displacement detection device is connected to the slider / cylinder via a detection signal line; The accumulator is connected to the control valve and the slider / cylinder respectively; the accumulator and the control valve are connected via a detection signal line; the control valve is connected to the PLC controller via the detection signal line; the speed / displacement detection device is connected to the return cylinder to detect the return rate of the return cylinder; An oil pipeline one is arranged between the cartridge valve and the return cylinder respectively, and the cartridge valve delivers the hydraulic oil to the return cylinder through the oil pipeline one.

2. A control system for a hydraulic press using an accumulator for controllable pressing according to claim 1, characterized in that: An oil pipeline 2 is arranged between the cartridge valve and the accumulator, and the cartridge valve delivers hydraulic oil to the accumulator through the oil pipeline 2.

3. A control system for a hydraulic press using an accumulator for controllable pressing according to claim 2, characterized in that: An oil pipeline three is arranged between the accumulator and the motor oil pump group, and the oil pipeline two is connected to the oil pipeline three, and the oil pump group is powered by the oil pipeline three to supply oil to the oil pipeline two.

4. A control system for a hydraulic press using an accumulator for controllable pressing according to claim 3, characterized in that: An oil pipeline four is arranged between the motor oil pump group and the cartridge valve, and the motor oil pump group delivers hydraulic oil to the cartridge valve through the oil pipeline four.

5. A control system for a hydraulic press using an accumulator for controllable pressing according to claim 1, characterized in that: An oil pipeline five is arranged between the oil tank and the motor oil pump group, and the oil tank delivers the hydraulic oil to the motor oil pump group through the oil pipeline five.

6. A control system for a hydraulic press using an accumulator for controllable pressing according to claim 1, characterized in that: The PLC controller and the cartridge valve are connected via a control signal circuit.

7. A control system for a hydraulic press using an accumulator for controllable pressing according to claim 2, characterized in that: The accumulator provides kinetic energy to the slider / cylinder after establishing connection with the slider / cylinder.

8. A control system for a hydraulic press using an accumulator for controllable pressing according to claim 1, characterized in that: The PLC controller is connected to the accumulator controller via a control signal circuit, and the accumulator controller is connected to the accumulator via a control circuit.

9. A control system for a hydraulic press using an accumulator for controllable pressing according to claim 1, characterized in that: After the motor oil pump group is connected to the cartridge valve through the oil delivery circuit, the hydraulic oil is delivered to the cartridge valve; the fault diagnosis device is interactively connected with the monitoring device, and the fault diagnosis device feeds back the fault information diagnosed by the system to the monitoring device.

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