CN213176218U - Oil circuit structure for realizing precise control of double-acting oil cylinder - Google Patents

Abstract

The utility model discloses an oil circuit structure for realizing precise control of a double-acting oil cylinder, which comprises a double-acting oil cylinder, an oil inlet pipeline, an oil outlet pipeline, a first accumulator and a second accumulator. The oil inlet, the other end is formed with a first branch pipe and a second branch pipe, the first branch pipe is communicated with the rodless cavity, and the first branch pipe is provided with a first solenoid valve, a first accumulator and a first two-way flow control valve, The second accumulator is communicated with the first branch pipe, the second branch pipe is communicated with the rod cavity of the double-acting oil cylinder, the second branch pipe is provided with a second solenoid valve, the oil outlet pipe is provided with a second two-way flow control valve, and the oil outlet pipe is provided with a second two-way flow control valve. One end of the road is connected with the oil outlet, and the other end is formed with a third branch and a fourth branch. The third branch is provided with a third solenoid valve and communicates with the second branch, and the fourth branch communicates with the first branch and is provided with a fourth branch The electromagnetic valve. The oil circuit can realize precise control of the double-acting oil cylinder, the overall cost is lower, and it is more conducive to popularization.

Description

Oil circuit structure for realizing precise control of double-acting oil cylinder

Technical Field

The utility model belongs to the technical field of the cylinder control technique and specifically relates to an oil circuit structure for realizing double-acting cylinder accurate control.

Background

The double-acting oil cylinder refers to a hydraulic cylinder which can input pressure oil from two sides of a piston. It is widely used in various fields. However, since the output of the double-acting cylinder is difficult to be accurately controlled, the double-acting cylinder is difficult to be used in the field of precision machining, for example, in the machining and production link of a dry granulator, the movement of the piston rod of the hydraulic cylinder is usually required to be accurately controlled, and the movement of the piston rod is required to be controlled within ± 0.5 mm. In order to realize the accurate control, the hydraulic servo control is usually adopted at present to realize the accurate control of the movement of the piston rod of the servo oil cylinder. However, the servo valve, the electro-hydraulic proportional valve and the servo cylinder are expensive, so the control mode has low cost performance and cannot be widely used.

SUMMERY OF THE UTILITY MODEL

The utility model provides a not enough to prior art, the utility model provides an oil circuit structure for realizing double-acting cylinder accurate control can realize satisfying operation requirement to double-acting cylinder's accurate control, and simple structure does benefit to the realization simultaneously, and overall cost is lower, does benefit to the popularization more.

In order to achieve the above object, the present invention provides an oil path structure for realizing precise control of a double-acting cylinder, comprising a double-acting cylinder, an oil inlet pipeline, an oil outlet pipeline, a first accumulator, and a second accumulator, wherein one end of the oil inlet pipeline is an oil inlet, the other end is formed with a first branch pipe and a second branch pipe, the first branch pipe is communicated with a rodless cavity of the double-acting cylinder, the first branch pipe is provided with a first electromagnetic valve, the first accumulator is communicated with the first branch pipe through a first two-way flow control valve, the second accumulator is communicated with the first branch pipe and is arranged between the first electromagnetic valve and the rodless cavity, the second branch pipe is communicated with the rodless cavity of the double-acting cylinder, the second branch pipe is provided with a second electromagnetic valve, the oil outlet pipeline is provided with a second two-way flow control valve, one end of the oil outlet pipeline is connected with an oil outlet, the other end is formed with a third branch and a fourth branch, the third branch is provided with a third electromagnetic valve, the third branch is communicated with the second branch pipe to form a first communicating port, the first communicating port is arranged between the second electromagnetic valve and the rod cavity of the double-acting oil cylinder, the fourth branch is communicated with the first branch pipe to form a second communicating port, and the fourth branch is provided with a fourth electromagnetic valve between the second communicating port and the second two-way flow control valve.

The beneficial effect who so sets up is: the mode is set, after oil is introduced into an oil inlet pipeline, energy is accumulated in the first energy accumulator and the second energy accumulator, after energy accumulation is completed, the first electromagnetic valve is closed, and when control is needed, the equipment is started, so that the pressure of the first energy accumulator is equal to the pressure of the second energy accumulator, and the position of a piston rod of the double-acting oil cylinder can be set or adjusted. When the double-acting piston needs to be controlled to accurately move towards the rod cavity, the second electromagnetic valve and the third electromagnetic valve are simultaneously opened, and the opening of the second two-way flow control valve is slightly larger than the opening of the second two-way flow control valve, so that the oil quantity discharged by the rod cavity of the double-acting oil cylinder is equal to the oil quantity discharged by the second two-way flow control valve minus the oil quantity discharged by the first two-way flow control valve. And similarly, when the piston is required to move towards the direction of the rodless cavity, the fourth electromagnetic valve and the second electromagnetic valve are simultaneously opened, the pressure of the rodless cavity of the double-acting cylinder is gradually reduced, and when the pressure of the rod cavity exceeds the rodless cavity, the piston slowly moves towards the rodless cavity. Thereby realize the accurate control to two effect cylinder output shafts, and the combination of displacement sensor, solenoid valve, flow control valve and energy storage ware in this oil circuit, be the device that often establishes in the equipment that needs the control, for example displacement sensor, electromagnetic switch valve, flow control valve and energy storage ware all belong to the indispensable part of dry process granulator, use like this and can not increase extra equipment cost, only need set for PLC control can, this kind of structure is also very simple, do benefit to the realization, low in production cost simultaneously, be convenient for popularize and use.

Furthermore, a plurality of auxiliary energy accumulators are arranged on the first branch pipe between the second energy accumulator and the double-acting oil cylinder, and the auxiliary energy accumulators are communicated with the first branch pipe through electromagnetic switch valves.

The beneficial effect who so sets up is: set up a plurality of auxiliary energy storage wares again, because conventional energy storage ware, the pressure that can accumulate is limited, can not satisfy all pressure interval's requirements, through increasing a plurality of energy storage wares for at the pressure range of difference, can open a plurality of auxiliary energy storage wares, supplementary pressure that maintains needs, this kind of simple structure does benefit to the realization, improves overall structure's result of use.

Further, still be connected with first flow sensor on the oil inlet pipeline, be connected with second flow sensor in second intercommunication mouth position on the fourth tributary.

The beneficial effect who so sets up is: the flow sensor is arranged to monitor flow information of the corresponding position in real time, so that a user can conveniently acquire data, know the oil pressure condition in the oil way and improve the using effect of the whole oil way structure.

Drawings

Fig. 1 is a schematic diagram of an oil circuit structure according to an embodiment of the present invention.

Detailed Description

The utility model is used for realize that the embodiment of the oil circuit structure of double acting cylinder accurate control is shown in figure 1: the double-acting oil cylinder type oil pump comprises a double-acting oil cylinder 1, an oil inlet pipeline 2, an oil outlet pipeline 3, a first energy accumulator 71 and a second energy accumulator 72, wherein one end of the oil inlet pipeline 2 is provided with an oil inlet, the other end of the oil inlet pipeline is provided with a first branch pipe 21 and a second branch pipe 22, the first branch pipe 21 is communicated with a rodless cavity of the double-acting oil cylinder 1, the first branch pipe 21 is provided with a first electromagnetic valve 41, the first energy accumulator 71 is communicated with the first branch pipe 21 through a first two-way flow control valve 61, the second energy accumulator 72 is communicated with the first branch pipe 21 and is arranged between the first electromagnetic valve 41 and the rodless cavity, the second branch pipe 22 is communicated with the rodless cavity of the double-acting oil cylinder 1, the second branch pipe 22 is provided with a second electromagnetic valve 42, the oil outlet pipeline 3 is provided with a second two-way flow control valve 62, one end of the oil outlet pipeline 3 is connected with an oil, the third branch 31 is provided with a third electromagnetic valve 43, the third branch 31 is communicated with the second branch pipe 22 to form a first communication port, the first communication port is arranged between the second electromagnetic valve 42 and the rod cavity of the double-acting oil cylinder 1, the fourth branch 32 is communicated with the first branch pipe 21 to form a second communication port, and the fourth branch 32 is provided with a fourth electromagnetic valve 44 between the second communication port and the second two-way flow control valve 62. The beneficial effect who so sets up is: with this configuration, after the oil is introduced into the oil inlet line 2, energy is accumulated in the first accumulator 71 and the second accumulator 72, after the energy accumulation is completed, the first solenoid valve 41 is closed, and when control is required, the apparatus is started so that the pressure of the first accumulator 71 is equal to the pressure of the second accumulator 72, and the position of the piston rod of the double-acting cylinder 1 can be set or adjusted. When the double-acting piston needs to be controlled to accurately move towards the rod cavity, the second electromagnetic valve 42 and the third electromagnetic valve 43 are simultaneously opened, and the opening of the second two-way flow control valve 62 is slightly larger than the opening of the second two-way flow control valve 62, so that the oil quantity discharged by the rod cavity of the double-acting oil cylinder 1 is equal to the oil quantity discharged by the second two-way flow control valve minus the oil quantity discharged by the first two-way flow control valve, the oil quantity discharged by the rod cavity of the double-acting oil cylinder 1 is extremely small due to the extremely small difference between the openings of the second two-way flow control valve and the first two-way flow control valve, the pressure oil in the rod cavity of the double-acting oil cylinder 1 is continuously discharged, the pressure in the rod cavity of the double-acting oil cylinder 1 is gradually reduced, and the pressure in the rod cavity is gradually higher than that in the rod cavity due to the fact that the rodless cavity is communicated with the second accumulator 72, and. Further, a displacement sensor can be arranged at the output end of the double-acting cylinder, when the displacement sensor detects that the piston rod reaches a set value, the control electromagnetic valve is powered off, the piston stops moving, similarly, when the piston is required to move towards the direction of the rodless cavity, the fourth electromagnetic valve 44 and the second electromagnetic valve 42 are simultaneously opened, the pressure of the rodless cavity of the double-acting cylinder 1 gradually decreases, and when the pressure of the rod cavity exceeds the rodless cavity, the piston slowly moves towards the rodless cavity. Thereby realize the accurate control to two effect cylinder output shafts, and the combination of displacement sensor, solenoid valve, flow control valve and energy storage ware in this oil circuit, be the device that often establishes in the equipment that needs the control, for example displacement sensor, electromagnetic switch valve 45, flow control valve and energy storage ware all belong to the indispensable part of dry process granulator, use like this and can not increase extra equipment cost, only need set for PLC control can, this kind of structure is also very simple, do benefit to the realization, low in production cost simultaneously, be convenient for popularize and use.

Furthermore, a plurality of auxiliary accumulators 73 are arranged on the first branch pipe 21 between the second accumulator 72 and the double-acting oil cylinder 1, and the auxiliary accumulators 73 are communicated with the first branch pipe 21 through the electromagnetic switch valve 45. The beneficial effect who so sets up is: set up a plurality of auxiliary energy storage ware 73 again, because conventional energy storage ware, the pressure that can accumulate is limited, can not satisfy all pressure interval's requirements, through increasing a plurality of energy storage wares for at the pressure range of difference, can open a plurality of auxiliary energy storage ware 73, supplementary pressure that maintains needs, this kind of simple structure does benefit to the realization, improves overall structure's result of use.

Further, a first flow sensor 51 is connected to the oil inlet pipe 2, and a second flow sensor 52 is connected to the fourth branch 32 at a second communication port. The beneficial effect who so sets up is: the flow sensor is arranged to monitor flow information of the corresponding position in real time, so that a user can conveniently acquire data, know the oil pressure condition in the oil way and improve the using effect of the whole oil way structure.

The above examples are only one of the preferred embodiments of the present invention, and the general changes and substitutions performed by those skilled in the art within the technical scope of the present invention are included in the protection scope of the present invention.

Claims (3)

1. An oil circuit structure for realizing precise control of a double-acting oil cylinder, comprising a double-acting oil cylinder, an oil inlet pipeline and an oil outlet pipeline, and is characterized in that: also includes a first accumulator, a second accumulator, the One end of the oil inlet pipeline is an oil inlet, the other end is formed with a first branch pipe and a second branch pipe, the first branch pipe is communicated with the rodless cavity of the double-acting oil cylinder, a first solenoid valve is arranged on the first branch pipe, and the The first accumulator communicates with the first branch pipe through the first two-way flow control valve, the second accumulator communicates with the first branch pipe and is arranged between the first solenoid valve and the rodless cavity, and the second branch pipe It is communicated with the rod cavity of the double-acting oil cylinder, the second branch pipe is provided with a second solenoid valve, the oil outlet pipeline is provided with a second two-way flow control valve, one end of the oil outlet pipeline is connected with the oil outlet, and the other A third branch and a fourth branch are formed at one end, a third solenoid valve is arranged on the third branch, the third branch communicates with the second branch to form a first communication port, and the first communication port is arranged on the second branch. Between the solenoid valve and the rod cavity of the double-acting oil cylinder, the fourth branch is communicated with the first branch pipe to form a second communication port, and the fourth branch is provided between the second communication port and the second two-way flow control valve. Fourth solenoid valve. 2 . The oil circuit structure for realizing precise control of a double-acting oil cylinder according to claim 1 , wherein the first branch pipe is provided with several auxiliary energy storages between the second accumulator and the double-acting oil cylinder. 3 . The auxiliary accumulator communicates with the first branch pipe through an electromagnetic switch valve. 3. The oil circuit structure for realizing precise control of a double-acting oil cylinder according to claim 1 or 2, wherein a first flow sensor is also connected to the oil inlet pipeline, and the fourth branch is connected to the second A second flow sensor is connected to the position of the communication port.

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