Hydraulic system experiment platform

Abstract

The invention discloses a hydraulic system experiment platform, which relates to the technical field of hydraulic control systems and comprises a hydraulic control system and an electrical control system. The hydraulic control system and the electrical control system are integrated on the rack; wherein the hydraulic control system comprises a hydraulic oil tank, a hydraulic oil pump, a pressure reducing valve, a pressure switching valve and a pressure sensor; a plurality of test interfaces are arranged at the tail end of an oil path connected with the pressure reducing valve and are connected with a to-be-tested hydraulic device of the to-be-tested hydraulic system; the pressure sensor is arranged on an oil path between the pressure reducing valve and the hydraulic device to be tested; the electrical control system comprises a human-computer interaction interface and a PLC. The PLC is electrically connected with the hydraulic control system and the man-machine interaction interface. And the PLC is used for controlling the hydraulic control system to carry out hydraulic test on the to-be-tested hydraulic device. According to the invention, the technical problems of long time consumption and high maintenance cost in the process of testing the hydraulic system of the equipment in the prior art are solved.

Description

Technical Field

[0001] The invention relates to the technical field of hydraulic control systems, in particular to a hydraulic system experimental platform. Background Art

[0002] The container gantry cranes at the wharf use a lot of hydraulic control systems, such as the nacelle protection system, lifting hydraulic brakes, trolley wheel clamp drive, and spreader hydraulic systems. These hydraulic systems use a lot of overflow valves, pressure reducing valves, cartridge valves, and hydraulic cylinders. With the increase of service life, the functions of related components will decline, and the cylinder will leak internally. In order to ensure reliability, the related equipment needs to be regularly inspected and repaired. The above-mentioned inspection and maintenance work is generally carried out in the workshop. In order to ensure that the related components have been repaired, the rated hydraulic test method is usually required after the inspection and maintenance of the related components is completed to avoid directly installing them on the quay crane for testing and finding that they have not been repaired, and need to be disassembled and repaired again. This not only reduces the available time of the equipment, but also increases the maintenance cost. At the same time, the original method of calibrating the set values of related protective hydraulic valves and pressure switches was to send them to the hydraulic system design manufacturer for standardization, which is not only time-consuming, but also has high maintenance costs. Summary of the invention

[0003] The purpose of the present invention is to provide a hydraulic system experimental platform in order to solve at least one of the above technical problems.

[0004] In the first aspect, an embodiment of the present invention provides a hydraulic system experimental platform, including: a hydraulic control system and an electrical control system; the hydraulic control system and the electrical control system are integrated on a frame; wherein the hydraulic control system includes a hydraulic oil tank, a hydraulic oil pump, a pressure reducing valve, a pressure switching valve and a pressure sensor; the hydraulic oil pump is arranged at the oil inlet position of the hydraulic oil tank, the pressure reducing valve is arranged on the oil circuit connected to the hydraulic oil pump, and a plurality of test interfaces are arranged at the end of the oil circuit connected to the pressure reducing valve, and the test interface is connected to the hydraulic device to be tested of the hydraulic system to be tested; the pressure sensor is arranged on the oil circuit between the pressure reducing valve and the hydraulic device to be tested, and is used to monitor the hydraulic value of the oil circuit; the electrical control system includes a human-computer interaction interface and a PLC controller; the PLC controller is electrically connected to the hydraulic control system and the human-computer interaction interface, respectively; the PLC controller is used to control the hydraulic control system to perform hydraulic testing on the hydraulic device to be tested.

[0005] Furthermore, the pressure reducing valve comprises a first pressure reducing valve and a second pressure reducing valve; the pressure switching valve is used to switch the pressure reducing valve connected to the oil circuit to the first pressure reducing valve or the second pressure reducing valve.

[0006] Furthermore, it also includes an oil pump motor and a coupling, and the oil pump motor is drivingly connected to the hydraulic oil pump through the coupling.

[0007] Further, the hydraulic device to be measured includes: the tensioning cylinder of the shore bridge trolley to be measured, the bracket cylinder of the shore bridge to be measured, the cartridge valve of the hanging cabin system to be measured, the swivel pin and hook cylinder of the spreader to be measured, the clamping wheel cylinder to be measured, and the center lock control cylinder of the spreader to be measured.

[0008] Further, a test solenoid valve is arranged between the test interface and the hydraulic device to be measured.

[0009] Further, the human-machine interaction interface includes a touch screen; the touch screen is used to display the hydraulic value of the oil circuit monitored by the pressure sensor and obtain the control instruction of the test solenoid valve.

[0010] Further, the electrical control system further includes an extended output module and a pressure switch analog access module electrically connected to the PLC controller; wherein, the pressure switch analog access module is used to access the switch quantity of the oil pump motor of the hydraulic oil pump; the extended output module is used to control the on-off of the test solenoid valve.

[0011] Further, an oil level scale is arranged in the hydraulic oil tank, an oil drain valve is arranged on the side wall of the hydraulic oil tank, and an oil inlet filter element is arranged between the hydraulic oil tank and the hydraulic oil pump.

[0012] Further, the electrical control system further includes a DC power supply.

[0013] The present invention provides a hydraulic system experimental platform, which can realize the switching and adjustment of multiple functional modes during the test of the equipment hydraulic system, improve the intelligence level of the system, the test process is simple, time-consuming is short, it is convenient for maintenance, and alleviates the technical problems of long time-consuming and high maintenance cost existing in the prior art during the test of the equipment hydraulic system. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings required to be used in the specific embodiments or the description of the prior art. Obviously, the following drawings are some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained according to these drawings without creative efforts.

[0015] Figure 1 It is a schematic diagram of a hydraulic control system provided by an embodiment of the present invention;

[0016] Figure 2 It is a schematic diagram of an electrical control system provided by an embodiment of the present invention;

[0017] Figure 3 It is a schematic diagram of the interface of a touch screen provided by an embodiment of the present invention;

[0018] Figure 4 The electrical control main circuit diagram of a hydraulic system experimental platform provided by an embodiment of the present invention;

[0019] Figure 5 The schematic diagram of the solenoid valve relay labels of a hydraulic control system provided by an embodiment of the present invention;

[0020] Figure 6 The schematic diagram of the control input signals of a PLC controller provided by an embodiment of the present invention;

[0021] Figure 7 The schematic diagram of the control input signals of a pressure switch analog access module provided by an embodiment of the present invention;

[0022] Figure 8 The schematic diagram of the control output signals of a PLC controller provided by an embodiment of the present invention;

[0023] Figure 9 The schematic diagram of the control output signals of an extended output module provided by an embodiment of the present invention.

[0024] In the figure: 1, hydraulic oil tank; 2, hydraulic oil pump; 3, pressure reducing valve; 4, pressure switching valve; 5, pressure sensor; 6, oil pump motor; 7, coupling; 8, oil level scale; 9, oil tank drain valve; 10, inlet oil filter element; 11, system accumulator; 12, check valve; 13, system main valve; 14, tensioning cylinder of the trolley of the quay crane to be measured; 15, bracket cylinder of the quay crane to be measured; 16, cartridge valve of the hanging cabin system to be measured; 17, pin and hook cylinder of the spreader to be measured; 18, clamping wheel cylinder to be measured; 19, middle lock control cylinder of the spreader to be measured; 20, oil circuit control valve of the hanging cabin cartridge valve; 21, test valve for the pin and hook of the spreader; 22, first solenoid valve; 23, test solenoid valve for the clamping wheel cylinder; 24, test valve for the middle lock control cylinder of the spreader; 25, second solenoid valve; 26, one-way adjustable throttle valve; 27, overflow valve; 28, human-machine interface; 29, PLC controller; 30, extended output module; 31, first pressure reducing valve; 32, second pressure reducing valve; 33, pressure switch analog access module; 34, DC power supply. Specific embodiments

[0025] 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. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0026] An embodiment of the present invention provides a hydraulic system experimental platform, including: a hydraulic control system and an electrical control system; the hydraulic control system and the electrical control system are integrated on a frame.

[0027] Figure 1 It is a schematic diagram of a hydraulic control system provided according to an embodiment of the present invention. As Figure 1 shown, the hydraulic control system includes a hydraulic oil tank 1, a hydraulic oil pump 2, a pressure reducing valve 3, a pressure switching valve 4, and a pressure sensor 5; the hydraulic oil pump 2 is arranged at the inlet position of the hydraulic oil tank 1, the pressure reducing valve 3 is arranged on the oil path connected to the hydraulic oil pump 2, and multiple test interfaces are arranged at the end of the oil path connected to the pressure reducing valve 3, and the test interfaces are connected to the hydraulic devices to be tested of the hydraulic system to be tested.

[0028] Specifically, the pressure sensor 5 is arranged on the oil path between the pressure reducing valve 3 and the hydraulic device to be tested, and is used to monitor the hydraulic value of the oil path.

[0029] Specifically, as Figure 1 shown, the pressure reducing valve 3 includes a first pressure reducing valve 31 and a second pressure reducing valve 32; the pressure switching valve 4 is used to switch the pressure reducing valve 3 connected to the oil path to the first pressure reducing valve 31 or the second pressure reducing valve 31. Optionally, the first pressure reducing valve 31 is a 13Mp pressure reducing valve, and the second pressure reducing valve 32 is a 23Mp pressure reducing valve.

[0030] Specifically, as Figure 1 shown, it further includes an oil pump motor 6 and a coupling 7, and the oil pump motor 6 is drivingly connected to the hydraulic oil pump 2 through the coupling 7.

[0031] An oil level scale 8 is arranged in the hydraulic oil tank 1, an oil tank drain valve 9 is arranged on the side wall of the hydraulic oil tank 1, and an inlet oil filter 10 is arranged between the hydraulic oil tank 1 and the hydraulic oil pump 2. Among them, the oil level scale 8 is used to display the liquid level of the hydraulic oil inside the hydraulic oil tank 1, the inlet oil filter 10 is used to filter the hydraulic oil entering the hydraulic oil tank 1, and the oil tank drain valve 9 is used to drain the hydraulic oil tank 1.

[0032] Specifically, as Figure 1 shown, it further includes a system accumulator 11, which is used to maintain the hydraulic pressure in the oil path within a preset range.

[0033] As Figure 1 shown, a check valve 12 and a system main valve 13 are further arranged between the hydraulic oil pump 2 and the pressure reducing valve 3, and the check valve 3 is used to prevent the reverse flow of hydraulic oil.

[0034] Specifically, a test solenoid valve is arranged between the test interface and the hydraulic device to be tested.

[0035] As Figure 1As shown in the figure, the hydraulic device to be tested includes: the tensioning cylinder 14 of the quay crane trolley to be tested, the bracket cylinder 15 of the quay crane to be tested, the cartridge valve 16 of the hanging cabin system to be tested, the swivel pin and hook cylinder 17 of the spreader to be tested, the clamping wheel cylinder 18 to be tested, and the central locking control cylinder 19 of the spreader to be tested.

[0036] Among them, a cartridge valve oil circuit control valve 20 is arranged between the test interface and the cartridge valve 16 of the hanging cabin system to be tested, a swivel pin and hook test valve 21 and a first solenoid valve 22 for controlling the swivel pin and hook test valve 21 are arranged between the test interface and the swivel pin and hook cylinder 17 of the spreader to be tested; a clamping wheel cylinder test solenoid valve 23 is arranged between the test interface and the clamping wheel cylinder 18 to be tested; a central locking control cylinder test valve 24 and a second solenoid valve 25 for controlling the central locking control cylinder test valve 24 are arranged between the test interface and the central locking control cylinder 19 of the spreader to be tested.

[0037] Optionally, a plurality of one-way adjustable throttle valves 26 and a plurality of overflow valves 27 are further arranged on the test oil circuit, and pressure sensors 5 are arranged at the test interface positions.

[0038] Figure 2 is a schematic diagram of an electrical control system provided according to an embodiment of the present invention. As Figure 2 shown,

[0039] The electrical control system includes a human-machine interface 28 and a PLC controller 29; the PLC controller 29 is electrically connected to the hydraulic control system and the human-machine interface 28 respectively.

[0040] Specifically, the PLC controller 29 is used to control the hydraulic control system to perform hydraulic tests on the hydraulic devices to be tested.

[0041] Preferably, the human-machine interface 28 includes a touch screen.

[0042] Figure 3 is a schematic diagram of the interface of a touch screen provided according to an embodiment of the present invention. As Figure 3 shown, the touch screen is used to display the hydraulic value of the oil circuit monitored by the pressure sensor and obtain the control command of the test solenoid valve.

[0043] Specifically, as Figure 2 shown, the electrical control system further includes an extended output module 30 and a pressure switch analog access module 33 that are electrically connected to the PLC controller 29.

[0044] Specifically, the pressure switch analog access module 33 is used to access the switch quantity of the oil pump motor 6 of the hydraulic oil pump 1;

[0045] The extended output module 30 is used to control the on-off of the test solenoid valve.

[0046] Specifically, asFigure 2 As shown, the electrical control system further includes a DC power supply 34, which serves as the power source for the hydraulic system experimental platform provided by the embodiments of the present invention. Optionally, the DC power supply 34 is a 24V DC power supply.

[0047] Figure 4 is the main circuit diagram of the electrical control of a hydraulic system experimental platform provided by the embodiments of the present invention. Figure 5 is a schematic diagram of the solenoid valve relay labels of a hydraulic control system provided by the embodiments of the present invention. As Figure 4 and Figure 5 shown, Figure 4 K1-K15 in are respectively the relay control contacts or control coils corresponding to KM and Figure 5 S1-S14 in. Specifically, QF1 is the main circuit power switch, KM is the control contactor of the oil pump motor, M1 is the oil pump motor, T1 is the control transformer, SB3 is the emergency stop switch contact, K1 is the relay control contact of the KM contactor, K2 is the relay for controlling the solenoid valve coil of S1, S1 is the control coil of the system main valve 13, K3 is the relay for controlling the solenoid valve coil of S2, S2 is the control coil of the pressure switching valve 4, K4 / K5 are the relays for controlling the solenoid valve coils of S3 / S4, K6 / K7 are the relays for controlling the solenoid valve coils of S5 / S6, S3 / S4 and S5 / S6 are the control coils of the externally controlled internally drained 3-position 4-way valve, K8 is the relay for controlling the solenoid valve coil of S7, S7 is the control coil of the oil circuit control valve 20 of the hanging cabin cartridge valve, K9 is the relay for controlling the solenoid valve coil of S8, S8 is the control coil of 22, K10 / K11 are the relays for controlling the solenoid valve coils of S9 / S10, S9 / S10 are the control coils of the first solenoid valve 21, K12 is the relay for controlling the solenoid valve coil of S11, S11 is the control solenoid valve of the pinch wheel cylinder test, K13 is the relay for controlling the solenoid valve coil of S12, S12 is the control coil of the second solenoid valve 25, K14 / K15 are the relays for controlling the solenoid valve coils of S13 / S14, S13 / S14 are the control coils of the test valve for the middle lock control cylinder of the spreader.

[0048] Figure 6 is a schematic diagram of the control input signals of a PLC controller provided by the embodiments of the present invention. Figure 7 is a schematic diagram of the control input signals of a pressure switch analog input module provided by the embodiments of the present invention. As Figure 6 and Figure 7 shown, SB1 is the start switch of the oil pump motor, SB2 is the stop switch of the oil pump motor, SB3 is the emergency stop button, H8 is the total pressure of the hydraulic system, and H9 is the calibration pressure of the cartridge valve.

[0049] Figure 8It is a schematic diagram of the control output signal of a PLC controller provided according to an embodiment of the present invention. Figure 9 It is a schematic diagram of the control output signal of an extended output module provided according to an embodiment of the present invention. The signal output points of the PLC controller 29 and the extended output module 30 are in correspondence with Figure 4 each control contact point or control coil in the main electrical control circuit diagram shown as Figure 8 and Figure 9 shown.

[0050] As can be seen from the above description, the embodiment of the present invention provides a hydraulic system experimental platform. In practical applications, users can select appropriate hydraulic output parameters according to specific requirements, and through different interfaces of the hydraulic manifold block, hydraulic devices to be tested or calibrated can be connected, realizing multi-functional use of one machine. At the same time, the reserved interfaces can be expanded according to actual needs.

[0051] 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 without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claimed rights.

[0052] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A hydraulic system experimental platform, characterized in that, include: A hydraulic control system and an electrical control system; the hydraulic control system and the electrical control system are integrated on the frame; wherein, The hydraulic control system comprises a hydraulic oil tank, a hydraulic oil pump, a pressure reducing valve, a pressure switching valve and a pressure sensor; the hydraulic oil pump is arranged at the oil inlet of the hydraulic oil tank, the pressure reducing valve is arranged on the oil circuit connected to the hydraulic oil pump, and a plurality of test interfaces are arranged at the end of the oil circuit connected to the pressure reducing valve, and the test interfaces are connected to the hydraulic components to be tested of the hydraulic system to be tested; The pressure sensor is arranged in the oil circuit between the pressure reducing valve and the hydraulic device to be tested, and is used to monitor the hydraulic pressure value of the oil circuit; The electrical control system includes a human-machine interaction interface and a PLC controller; the PLC controller is electrically connected to the hydraulic control system and the human-machine interaction interface respectively; The PLC controller is used to control the hydraulic control system to perform hydraulic testing on the hydraulic device to be tested.

2. The hydraulic system experimental platform according to claim 1, wherein: The pressure reducing valve comprises a first pressure reducing valve and a second pressure reducing valve; the pressure switching valve is used to switch the pressure reducing valve connected to the oil circuit to the first pressure reducing valve or the second pressure reducing valve.

3. The hydraulic system experimental platform according to claim 1, wherein: It also includes an oil pump motor and a coupling, and the oil pump motor is drivingly connected to the hydraulic oil pump through the coupling.

4. The hydraulic system experimental platform according to claim 1, characterized in that: The hydraulic components to be tested include: a tensioning cylinder of a quay crane trolley to be tested, a cylinder of a quay crane bracket to be tested, a cartridge valve of a nacelle system to be tested, a swing pin and a hook cylinder of a spreader to be tested, a wheel clamp cylinder to be tested, and a center lock control cylinder of a spreader to be tested.

5. The hydraulic system experimental platform according to claim 1, characterized in that: A test solenoid valve is arranged between the test interface and the hydraulic device to be tested.

6. The hydraulic system experimental platform according to claim 5, wherein: The human-machine interaction interface includes a touch screen; the touch screen is used to display the oil circuit hydraulic pressure value monitored by the pressure sensor and obtain the control instruction of the test solenoid valve.

7. The hydraulic system experimental platform according to claim 5, characterized in that: The electrical control system also includes an expansion output module and a pressure switch analog quantity access module electrically connected to the PLC controller; wherein, The pressure switch analog quantity access module is used to access the switch quantity of the oil pump motor of the hydraulic oil pump; The extended output module is used to control the on and off of the test solenoid valve.

8. The hydraulic system experimental platform according to claim 1, characterized in that: An oil level gauge is arranged in the hydraulic oil tank, an oil tank drain valve is arranged on the side wall of the hydraulic oil tank, and an oil inlet filter element is arranged between the hydraulic oil tank and the hydraulic oil pump.

9. The hydraulic system experimental platform according to claim 1, wherein: The electrical control system also includes a DC power supply.

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