CN201196176Y - Liquid filling device of hydraulic cylinder controlled by reversal valve - Google Patents

Abstract

The utility model provides a reversing valve control hydraulic cylinder liquid-filled device, which comprises a switch reluctance motor, a hydraulic cylinder, a three-position four-way valve, a pressure transducer, a hydraulic pump, a machine controller, a programmable controller, a reversing valve relay and a supervisory keyboard, wherein the input end of the machine controller is connected with the supervisory keyboard, the output end is connected with the switch reluctance motor which is connected with the hydraulic pump, the hydraulic cylinder is connected with the three-position four-way valve whose input end is connected with the hydraulic pump via a channel which is provided with the pressure transducer, the output end of the pressure transducer is connected with the programmable controller whose output end is connected with the machine controller and the control end of the three-position four-way valve via the reversing valve relay. The device is characterized by increasing a two position two-way valve and a top petrol tank, wherein the input end of the two position two-way valve is connected with the top petrol tank, the output end is connected with the liquid-filled end of the hydraulic cylinder, and the control end is connected with the programmable controller via the reversing valve relay. The device is controllered by the reversing valve and controls liquid-filling according to liquid pressure, which is good in working performance.

Description

Reversing valve controlled hydraulic cylinder filling device

technical field

The utility model provides a liquid filling device for a reversing valve-controlled hydraulic cylinder, which belongs to the field of hydraulic machinery.

Background technique

The liquid filling system of the hydraulic cylinder has been controlled by a hydraulic control check valve for a long time, and there is a defect that the hydraulic control port is easy to be blocked. With the application of switched reluctance motors, the digital control of flow and pressure has been realized, and the hydraulic cylinder filling system can eliminate the easy-to-fault hydraulic control check valves, and then adopt electronically controlled reversing valves.

Utility model content

The purpose of the utility model is to provide a reversing valve-controlled hydraulic cylinder liquid filling device which can overcome the above-mentioned defects, and has an electric control hydraulic cylinder liquid filling action and reliable working performance. Its technical solution is:

Control system including hydraulic system and switched reluctance motor, where hydraulic system includes hydraulic cylinder, three-position four-way valve, pressure sensor and hydraulic pump, control system includes motor controller, programmable controller, reversing valve relay and control The keyboard, the input terminal of the motor controller is connected to the control keyboard, the signal output terminal is connected to the switched reluctance motor, the switched reluctance motor is connected to the hydraulic pump, the hydraulic cylinder is connected to the three-position four-way valve, and the input end of the three-position four-way valve is provided with The pipeline of the pressure sensor is connected to the hydraulic pump, the output end of the pressure sensor is connected to the programmable controller, the output end of the programmable controller is connected to the motor controller, and the control end of the three-position four-way valve is connected to the reversing valve relay. The feature is that a two-position two-way valve and a high-level oil tank are added, wherein the input end of the two-position two-way valve is connected to the high-level oil tank, the output end is connected to the liquid filling end of the hydraulic cylinder, and the control end is connected to the programmable controller through the reversing valve relay.

In the liquid filling device for the reversing valve-controlled hydraulic cylinder, the control keyboard adopts a touch screen control keyboard.

The reversing valve-controlled hydraulic cylinder liquid filling device adopts multiple hydraulic cylinders, and each hydraulic cylinder is correspondingly equipped with a three-position four-way valve, and the programmable controller is respectively connected to the corresponding three-position four-way valve through the reversing valve relay. control side of the valve.

In the reversing valve-controlled hydraulic cylinder liquid filling device, the hydraulic cylinder adopts a hydraulic master cylinder, and there are two corresponding two-position two-way valves, and a two-position three-way valve is added, wherein the programmable controller passes the reversing valve The relay is connected to the control terminal of the corresponding two-position three-way valve, the output terminal of one two-position two-way valve is connected to the sub-cylinder of the hydraulic cylinder, the sub-cylinder is connected to the three-position four-way valve, and the output terminal of the other two-position two-way valve is connected to the hydraulic cylinder. The master cylinder of the hydraulic cylinder is connected to the hydraulic pump through a two-position three-way valve and a pipeline with a pressure sensor in turn.

Its working principle is: when the piston goes down, the programmable controller controls the two-position two-way reversing valve to conduct through the reversing valve relay, and the replenishment liquid of the high-level fuel tank enters the hydraulic cylinder. , send a signal to the programmable controller, and the programmable controller controls the two-position two-way reversing valve to shut off through the reversing valve relay, and the high-pressure oil of the hydraulic pump enters the hydraulic cylinder through the three-position four-way valve to apply working pressure to the piston. , During the return trip, the two-position two-way reversing valve is turned on, and the oil in the upper chamber of the hydraulic cylinder quickly returns to the high-level oil tank.

Compared with the prior art, the utility model has the following advantages:

1. The hydraulic cylinder filling system is controlled by the reversing valve, eliminating the need for a hydraulic control check valve. The structure is simple and reasonable, and the working performance is reliable.

2. The liquid filling is controlled by the programmable controller according to the liquid pressure, realizing the program control.

Description of drawings

Fig. 1 is the structural representation of the utility model embodiment 1;

Fig. 2 is a schematic structural view of Embodiment 2 of the utility model.

In the figure: 1. Motor controller 2. Switched reluctance motor 3. Hydraulic pump 4. Fuel tank 5. Three-position four-way valve 6. Pipeline 7. Piston 8. Hydraulic cylinder 9. Two-position two-way valve 10. Pressure sensor 11 , Reversing valve relay 12. Programmable controller 13. Control keyboard 14. Two-position three-way valve 15. High oil tank

Detailed ways

The utility model is briefly described below in conjunction with the accompanying drawings: in the embodiment shown in Figure 1, the control keyboard 13 adopts a touch screen control keyboard to connect the programmable controller 12 and the motor controller 1, and the signal output terminal of the motor controller 1 is connected Switched reluctance motor 2, switched reluctance motor 2 is connected to hydraulic pump 3, the output terminal of programmable controller 12 is connected to motor controller 1, and connected to three-position four-way valve 5 and two-position two-way through reversing valve relay 11 The control end of the valve 9, the hydraulic cylinder 8 is connected to the three-position four-way valve 5 and the two-position two-way valve 9, the two-position two-way valve 9 is connected to the high oil tank 15, and the input end of the three-position four-way valve 5 is provided with a pressure sensor 10 The pipeline 6 is connected to the hydraulic pump 3, and the output terminal of the pressure sensor 10 is connected to the programmable controller 12.

The embodiment shown in Figure 2 is basically the same as Embodiment 1, except that the hydraulic cylinder 8 adopts a hydraulic master cylinder, and there are two corresponding two-position two-way valves 9, and a two-position three-way valve 14 is added, one of which is two-position two-way The output terminal of the valve 9 is connected to the sub-cylinder of the hydraulic cylinder 8, the sub-cylinder is connected to the three-position four-way valve 14, and the output terminal of the other two-position two-way valve 9 is connected to the master cylinder of the hydraulic cylinder 8, and the master cylinder is sequentially passed through the two-position three-way valve. The valve 14 and the pipeline 6 provided with the pressure sensor 10 are connected to the hydraulic pump 3 .

The utility model can be used in hydraulic systems of various mechanical equipments, and can replace hydraulically driven servo machinery (such as transportation machinery, forging machinery, metallurgical machinery, molding machinery, hydraulic presses, injection molding machines, die-casting machines, rolling mill pressurization machinery, etc.) The traditional electro-hydraulic servo system using electro-hydraulic servo valves and the hydraulic system controlled by AC servo motors, with the further development of technology, the system will also achieve great development in other fields.

Claims (4)

1. selector valve control oil hydraulic cylinder charging device, the control system that comprises hydraulic system and switched reluctance machines (2), wherein hydraulic system comprises oil hydraulic cylinder (8), three-position four-way valve (5), pressure transducer (10) and oil hydraulic pump (3), control system comprises electric machine controller (1), programmable controller (12), selector valve relay (11) and supervisory keyboard (13), the input termination supervisory keyboard (13) of electric machine controller (1), its signal output part connects switched reluctance machines (2), switched reluctance machines (2) connects oil hydraulic pump (3), oil hydraulic cylinder (8) connects three-position four-way valve (5), the pipeline (6) of the input end of three-position four-way valve (5) through being provided with pressure transducer (10) connects oil hydraulic pump (3), the output termination programmable controller (12) of pressure transducer (10), the output termination electric machine controller (1) of programmable controller (12), and connect the control end of three-position four-way valve (5) through selector valve relay (11), it is characterized in that: set up two position two-way valve (9) and top petrol tank (15), the input termination top petrol tank (15) of two position two-way valve (9) wherein, the topping up end of output termination oil hydraulic cylinder (8), control end connects programmable controller (12) through selector valve relay (11).

2. selector valve control oil hydraulic cylinder charging device as claimed in claim 1 is characterized in that: supervisory keyboard (13) adopts the touch screen supervisory keyboard.

3. selector valve control oil hydraulic cylinder charging device as claimed in claim 1, it is characterized in that: oil hydraulic cylinder (8) adopts a plurality of, each oil hydraulic cylinder (8) correspondence is provided with a three-position four-way valve (5), and programmable controller (12) connects the control end of corresponding three-position four-way valve (5) respectively through selector valve relay (11).

4. selector valve control oil hydraulic cylinder charging device as claimed in claim 1, it is characterized in that: oil hydraulic cylinder (8) adopts hydraulic pressure primary and secondary cylinder, corresponding two position two-way valve with it (9) has two, and set up two position three-way valve (14), wherein programmable controller (12) connects the control end of corresponding two position three-way valve (14) through selector valve relay (11), the sub-cylinder of the output termination oil hydraulic cylinder (8) of a two position two-way valve (9), sub-cylinder connects three-position four-way valve (5), female cylinder of the output termination oil hydraulic cylinder (8) of another two position two-way valve (9), female cylinder connect oil hydraulic pump (3) through two position three-way valve (14) and the pipeline (6) that is provided with pressure transducer (10) successively.

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