Hydraulic station of intelligent cooling machine

Abstract

The utility model discloses a hydraulic station of an intelligent cooling machine, which comprises an oil pump communicated with an oil tank, an oil supply path behind the oil pump supplies oil to a hydraulic cylinder, an overflow valve is arranged on the oil supply path, a proportional directional valve is arranged behind the overflow valve, and two outlets of the proportional directional valve are respectively communicated with a rodless cavity and a rod cavity of the hydraulic cylinder; oil inlets of a rodless cavity and a rod cavity of the hydraulic cylinder are respectively communicated with two oil inlets of a proportional control valve, an oil outlet of the proportional control valve is connected with a one-way valve, and the one-way valve is communicated with a hot oil return path of the oil tank; a displacement sensor for detecting the position of the piston is arranged in the hydraulic cylinder; a defoaming device is arranged in the oil tank, and the defoaming device is in a metal net detachable form. Hot oil in the oil cylinder can be circularly cooled, and the proportional control valve can be overhauled on line.

Description

Technical Field

[0001] The utility model relates to a hydraulic station of an intelligent cooler. Background Art

[0002] In the existing hydraulic station of an intelligent cooler, the hot oil in the oil cylinder cannot be circulated and cooled, which affects the service life of the oil cylinder seal and the oil; the proportional control valve of the existing hydraulic station cannot be overhauled online, and the overhaul is troublesome. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a hydraulic station of an intelligent cooler in which the hot oil in the oil cylinder can be circulated and cooled, and the proportional control valve can be overhauled online.

[0004] The technical solution of the utility model is as follows:

[0005] A hydraulic station of an intelligent cooler includes an oil pump communicated with an oil tank. It is characterized in that: the oil supply oil path after the oil pump supplies oil to a hydraulic cylinder, an overflow valve is arranged on the oil supply oil path, a proportional reversing valve is arranged behind the overflow valve, and two outlets of the proportional reversing valve are respectively communicated with the rodless cavity and the rod cavity of the hydraulic cylinder; the oil inlet of the rodless cavity and the rod cavity of the hydraulic cylinder is respectively communicated with two oil inlets of a proportional control valve, the oil outlet of the proportional control valve is connected with a one-way valve, and the one-way valve is then connected to a hot oil return oil path leading to the oil tank; a displacement sensor for detecting the position of the piston is arranged inside the hydraulic cylinder; an anti-foaming device is arranged inside the oil tank, and the anti-foaming device is in a form of a detachable metal mesh.

[0006] A filter is arranged on the hot oil return oil path.

[0007] The proportional control valve group of the utility model has an online overhaul function, so that when disassembling this loop, it does not affect the work of other proportional control valve groups. The system is provided with an oil change function to continuously discharge and circulate and cool the hot oil at the oil cylinder end, and improve the service life of the oil cylinder seal and the oil. The displacement sensor is changed from the usual arrangement outside the oil cylinder to the arrangement inside the oil cylinder, so that there is no need to separately reserve space and brackets on site to install the displacement sensor, and at the same time, the protection of the displacement sensor is increased. A detachable in-tank filtering and anti-foaming device is provided, which can reduce the bubbles in the oil, reduce the vibration and noise of the pump, and improve the stability of the system operation. Description of the Drawings

[0008] The following further illustrates the utility model with reference to the drawings and embodiments.

[0009] Figure 1 It is a schematic structural diagram of an embodiment of the utility model. Detailed Embodiment

[0010] A hydraulic station for an intelligent cooler, comprising an oil pump 2 communicating with an oil tank 1. The oil supply circuit after the oil pump supplies oil to a hydraulic cylinder 4. An overflow valve 3 is provided on the oil supply circuit, and a proportional directional valve 5 is provided behind the overflow valve. Two outlets of the proportional directional valve communicate with the rodless chamber and the rod chamber of the hydraulic cylinder respectively. The oil inlets of the rodless chamber and the rod chamber of the hydraulic cylinder communicate with two oil inlets of a proportional control valve 6 respectively. The oil outlet of the proportional control valve is connected to a check valve 7, and the hot oil return oil circuit 8 leading to the oil tank is connected after the check valve. A displacement sensor 9 for detecting the position of the piston is arranged inside the hydraulic cylinder. An anti-foaming device 10 is arranged inside the oil tank, and the anti-foaming device is in the form of a detachable metal mesh.

[0011] A filter 11 is provided on the hot oil return oil circuit.

[0012] The proportional control valve group has an on-line maintenance function. A check valve is configured in the return oil circuit of each proportional control valve group, so that when a certain proportional control valve group fails, the circuit can be disassembled, and the oil in the total return oil pipe will not spray out, without affecting the operation of other proportional control valve groups.

[0013] The system is provided with an oil change function. A hot oil shuttle valve (the proportional control valve 6 and a check valve 7 form a hot oil shuttle valve) is added at the oil inlet and outlet of the oil cylinder. At the same time, a separate oil circuit is set to collect the return oil of the hot oil shuttle valve into the oil tank for cooling. In this way, the hot oil at the end of the oil cylinder can be continuously discharged and circulated during operation, improving the service life of the oil seal and the oil fluid of the oil cylinder.

[0014] The displacement sensor is arranged inside the oil cylinder, so that there is no need to separately reserve space and brackets on site for installing the displacement sensor, making the construction convenient and simple, and at the same time increasing the protection of the displacement sensor.

[0015] A detachable in-tank filtering and anti-foaming device is provided. A detachable wire mesh is arranged inside the oil tank to separate the oil inlet area and the return oil area of the oil tank, which can reduce the bubbles in the oil fluid, avoid cavitation phenomenon after the pump sucks oil, reduce the vibration and noise of the pump, and improve the stability of the system operation.

Claims

1. A hydraulic station for an intelligent cooling machine, comprising an oil pump connected to an oil tank, characterized in that: The oil supply circuit behind the oil pump supplies oil to the hydraulic cylinder, and an overflow valve is provided on the oil supply circuit, and a proportional reversing valve is provided behind the overflow valve, and two outlets of the proportional reversing valve are respectively communicated with the rodless chamber and the rod chamber of the hydraulic cylinder; the oil inlets of the rodless chamber and the rod chamber of the hydraulic cylinder are respectively communicated with the two oil inlets of the proportional control valve, and the oil outlet of the proportional control valve is connected with a one-way valve, and the one-way valve is connected to the hot oil return circuit to the oil tank; a displacement sensor for detecting the piston position is provided in the hydraulic cylinder; a defoaming device is provided inside the oil tank, and the defoaming device is in the form of a detachable metal mesh.

2. The hydraulic station of the intelligent cooling machine according to claim 1 is characterized in that: A filter is arranged on the hot oil return oil line.

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