Reset structure of plunger oil cylinder

Abstract

The reset structure comprises a plunger oil cylinder body, a plunger piston is arranged on the inner side of the plunger oil cylinder body, an oil inlet and an oil outlet are formed in the bottom of the plunger oil cylinder body, and the oil inlet and the oil outlet are connected through a first hydraulic oil inlet and outlet pipeline. The first hydraulic oil inlet and outlet pipeline is arranged on the surface of the inner end of one side of the oil pump, the second hydraulic oil inlet and outlet pipeline is arranged on the surface of the inner end of the other side of the oil pump, and the first electromagnetic control valve is arranged at the outer end of the first hydraulic oil inlet and outlet pipeline. The electromagnetic control valve is used for controlling opening and closing, so that the electromagnetic control valve is conveniently driven into the plunger oil cylinder body to jack up the plunger piston, and then the hydraulic oil in the plunger oil cylinder body can be quickly sucked out again through the reverse rotation of the driving motor and the switching of the opening and closing sequence of the electromagnetic control valve; and the plunger can be conveniently and quickly reset.

Description

Technical Field

[0001] This utility model relates to the field of reset structure of plunger cylinders, and more specifically, to a reset structure of a plunger cylinder. Background Technology

[0002] With its simple structure and reliable operation, the piston hydraulic cylinder is a hydraulic actuator that converts hydraulic energy into mechanical energy for linear reciprocating motion (or oscillating motion). Its simple structure, reliable operation, lack of need for a speed reduction device, and smooth movement make it widely used in the hydraulic systems of various machines.

[0003] A plunger cylinder is a type of hydraulic cylinder primarily used to achieve unidirectional motion. It is particularly suitable for applications with long strokes and comes in radial and axial versions. A plunger cylinder mainly consists of a cylinder body, plunger, sealing device, guide mechanism, inlet / outlet ports, and accessories. The cylinder body is typically made of high-strength alloy steel or cast iron to withstand high pressure and harsh working environments. The plunger is the moving part within the hydraulic cylinder, tightly fitted to the inner wall of the cylinder body by the sealing device to ensure the hydraulic oil's sealing performance. The guide mechanism guides the plunger to move smoothly back and forth within the cylinder body, reducing friction and wear.

[0004] In common pressure testing machines, due to usage requirements and cost considerations, a relatively simple high-pressure plunger structure is generally adopted, consisting of a cylinder, piston, sealing ring, and inlet and return oil pipes. The piston rises by being driven by hydraulic oil input from the oil pump, and the piston descends slowly by its own weight, which is relatively slow. In order to speed up the descent, a common solution is to add a spring. However, adding a spring affects the control effect. Utility Model Content

[0005] To address the problems existing in the prior art, the purpose of this utility model is to provide a reset structure for a plunger cylinder. By adopting a reciprocating oil pump structure, the rotation of the drive motor drives the eccentric shaft to rotate, which can drive the bottom suction piston to move repeatedly, extracting hydraulic oil. The opening and closing of the hydraulic oil is controlled by an electromagnetic control valve, which facilitates the injection into the plunger cylinder to lift the plunger piston. Then, by reversing the drive motor and switching the opening and closing sequence of the electromagnetic control valve, the hydraulic oil in the plunger cylinder can be quickly sucked out again, which facilitates the rapid reset of the plunger.

[0006] To solve the above problems, the present invention adopts the following technical solution.

[0007] A reset structure for a plunger cylinder includes a plunger cylinder body, a plunger piston disposed on the inner side of the plunger cylinder body, and an oil inlet / outlet port disposed at the bottom of the plunger cylinder body. The oil inlet / outlet port is connected to a first hydraulic oil inlet / outlet pipe, which is disposed on the inner end surface of one side of an oil pump. A second hydraulic oil inlet / outlet pipe is disposed on the inner end surface of the other side of the oil pump. A first electromagnetic control valve is disposed at the outer end of the first hydraulic oil inlet / outlet pipe, and a second electromagnetic control valve is disposed at the outer end of the second hydraulic oil inlet / outlet pipe. A suction piston is disposed on the inner surface of the oil pump. By adopting a reciprocating oil pump structure, the rotation of the eccentric shaft driven by the rotation of the drive motor can drive the suction piston at the bottom to move repeatedly, thereby extracting hydraulic oil. The opening and closing of the electromagnetic control valve is controlled to facilitate the injection into the plunger cylinder body to lift the plunger piston. Then, by reversing the drive motor and switching the opening and closing sequence of the electromagnetic control valve, the hydraulic oil in the plunger cylinder body can be quickly extracted again, facilitating rapid reset of the plunger.

[0008] Furthermore, the upper end of the suction piston is provided with a hinge seat, and a reciprocating connecting rod is hinged inside the hinge seat.

[0009] Furthermore, a bushing is fixedly connected to the upper surface of the reciprocating connecting rod, and an eccentric shaft is connected to the inner surface of the bushing via a bearing.

[0010] Furthermore, a U-shaped seat is fixed to the outer surface of the oil pump, the shaft of the eccentric shaft is connected to the inner surface of the U-shaped seat through a bearing, and a drive motor is fixed to the outer end of the U-shaped seat.

[0011] Furthermore, the drive shaft end face of the drive motor is fixedly mounted on the inner surface of the eccentric shaft.

[0012] Furthermore, the drive shaft end face of the drive motor is provided with a square protrusion, and the end face of the eccentric shaft is provided with a square groove. The outer surface of the square protrusion is slidably engaged with the inner surface of the square groove.

[0013] Furthermore, a sealing ring is fixed to the outer surface of the suction piston, and the sealing ring is tightly attached to the inner surface of the oil pump.

[0014] Compared with existing technologies, the advantages of this utility model are:

[0015] (1) By adopting a reciprocating oil pump structure, the eccentric shaft is driven to rotate by the drive motor, which can drive the bottom suction piston to move repeatedly and extract hydraulic oil. The opening and closing are controlled by the electromagnetic control valve, which is convenient to inject into the piston cylinder to lift the piston. Then, by reversing the drive motor and switching the opening and closing sequence of the electromagnetic control valve, the hydraulic oil in the piston cylinder can be quickly sucked out again, which is convenient for the piston to be quickly reset. Attached Figure Description

[0016] Figure 1 This is a first schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a second schematic diagram of the overall structure of this utility model;

[0018] Figure 3 This is a third schematic diagram of the overall structure of this utility model;

[0019] Figure 4 This is a schematic cross-sectional view of the overall structure of this utility model;

[0020] Figure 5 This is a partial structural diagram of the drive motor of this utility model.

[0021] Explanation of the labels in the diagram:

[0022] 1. Piston cylinder body, 2. Piston piston, 3. Oil pump, 4. First hydraulic oil inlet / outlet pipe, 5. First solenoid control valve, 6. Second hydraulic oil inlet / outlet pipe, 7. Second solenoid control valve, 8. Suction piston, 9. Hinge seat, 10. Reciprocating connecting rod, 11. Bushing, 12. Eccentric shaft, 13. U-shaped seat, 14. Drive motor, 15. Square protrusion. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example

[0024] Please see Figure 1-5A reset structure for a plunger cylinder includes a plunger cylinder body 1, a plunger piston 2 disposed inside the plunger cylinder body 1, and an oil inlet / outlet port disposed at the bottom of the plunger cylinder body 1, which is connected to the oil inlet / outlet port via a first hydraulic oil inlet / outlet pipe 4. The first hydraulic oil inlet / outlet pipe 4 is disposed on the inner end surface of one side of an oil pump 3, and a second hydraulic oil inlet / outlet pipe 6 is disposed on the inner end surface of the other side of the oil pump 3. A first solenoid control valve 5 is disposed at the outer end of the first hydraulic oil inlet / outlet pipe 4, and a second solenoid control valve 7 is disposed at the outer end of the second hydraulic oil inlet / outlet pipe 6 (a solenoid valve is an industrial device controlled by electromagnetic force, used to control fluids in an automated process). The component, belonging to actuators, is not limited to hydraulic or pneumatic systems. It is used in industrial control systems to adjust the direction, flow rate, speed, and other parameters of the medium (existing technology). The inner surface of the oil pump 3 is provided with a suction piston 8. By adopting a reciprocating oil pump structure, the rotation of the drive motor drives the eccentric shaft to rotate, which can drive the suction piston at the bottom to move repeatedly, thus extracting hydraulic oil. The opening and closing of the hydraulic oil is controlled by an electromagnetic control valve, which facilitates the injection into the piston cylinder to lift the piston. Then, by reversing the drive motor and switching the opening and closing sequence of the electromagnetic control valve, the hydraulic oil in the piston cylinder can be quickly extracted again, which can facilitate the rapid reset of the piston.

[0025] The upper end of the suction piston 8 is provided with a hinge seat 9, and a reciprocating connecting rod 10 is hinged inside the hinge seat 9 to facilitate reciprocating motion.

[0026] A bushing 11 is fixedly connected to the upper surface of the reciprocating connecting rod 10, and an eccentric shaft 12 is connected to the inner surface of the bushing 11 through a bearing; it can form an eccentric rotation, which can drive the reciprocating connecting rod 10 to reciprocate, drive the suction piston 8 to reciprocate, and perform hydraulic oil suction.

[0027] A U-shaped seat 13 is fixed to the outer surface of the oil pump 3. The shaft of the eccentric shaft 12 is connected to the inner surface of the U-shaped seat 13 by a bearing. A drive motor 14 is fixed to the outer end of the U-shaped seat 13 for easy driving.

[0028] The drive shaft end face of the drive motor 14 is fixedly mounted on the inner surface of the eccentric shaft 12; the drive shaft end face of the drive motor 14 is provided with a square protrusion 15, and the end face of the eccentric shaft 12 is provided with a square groove. The outer surface of the square protrusion 15 is slidably engaged with the inner surface of the square groove; the installation is convenient. When the drive motor 14 drives, it drives the square protrusion 15 to rotate. The square protrusion 15 can be engaged in the eccentric shaft 12 to rotate, and the eccentric shaft 12 can rotate, making the rotation drive convenient.

[0029] A sealing ring is fixed on the outer surface of the suction piston 8, and the sealing ring is tightly attached to the inner surface of the oil pump 3; thereby improving the sealing performance of the suction piston 8.

[0030] In operation, an inlet and outlet port is provided at the bottom of the piston cylinder body 1, which is connected to a first hydraulic oil inlet / outlet pipe 4. The first hydraulic oil inlet / outlet pipe 4 is located on one inner end surface of the oil pump 3, and a second hydraulic oil inlet / outlet pipe 6 is located on the other inner end surface of the oil pump 3. A first solenoid control valve 5 is located at the outer end of the first hydraulic oil inlet / outlet pipe 4, and a second solenoid control valve 7 is located at the outer end of the second hydraulic oil inlet / outlet pipe 6. A suction piston 8 is located on the inner surface of the oil pump 3. In operation, the drive motor 14 drives the eccentric shaft 12 to rotate, which in turn drives the bushing 11 to reciprocate. It can drive the reciprocating connecting rod 10 to reciprocate, which can cause eccentric rotation, drive the reciprocating connecting rod 10 to reciprocate, drive the suction piston 8 to reciprocate, and can suck up hydraulic oil; when the suction piston 8 floats upward, it can be closed by the first electromagnetic control valve 5 and opened by the second electromagnetic control valve 7, and external hydraulic oil can be sucked up through the second hydraulic oil inlet and outlet pipe 6. After being sucked in, the second electromagnetic control valve 7 can be closed and the first electromagnetic control valve 5 can be opened. At this time, the suction piston 8 is pressed down, and the hydraulic oil is pumped into the first hydraulic oil inlet and outlet pipe 4, which can be pumped into the piston cylinder body 1, pushing the injection piston 2 to rise, and so on.

[0031] When the injection piston 2 descends and resets, all processes are reversed. This is controlled by the control system, which drives the motor 14 to reverse, which in turn drives the eccentric shaft 12 to reverse, and similarly drives the suction piston 8 to reciprocate. First, the first solenoid control valve 5 is opened, and the suction piston 8 draws hydraulic oil from the oil pump 3 upward. Then, the second solenoid control valve 5 is closed, and the second solenoid control valve 7 is opened, causing the suction piston 8 to descend and allowing hydraulic oil to be discharged from the second hydraulic oil inlet / outlet pipe 6. Then, the second solenoid control valve 7 is closed and the first solenoid control valve 5 is opened. The above movement is repeated, which can quickly draw hydraulic oil from the plunger cylinder body 1, creating a negative pressure that allows the injection piston 2 to descend and reset quickly. Resetting is convenient and control is convenient. Without adding springs or other parts, only modifying the oil circuit system, the problem of rapid piston descent is achieved by using the forward and reverse rotation of the oil pump, and the control effect is not affected.

[0032] The above description is merely a preferred embodiment of this utility model; however, the protection scope of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in this utility model, based on the technical solution and its improved concept, should be included within the protection scope of this utility model.

Claims

1. A reset structure of a plunger cylinder, comprising a plunger cylinder body (1), characterized in that: A plunger piston (2) is provided on the inner side of the plunger cylinder body (1). An oil inlet and outlet port is provided at the bottom of the plunger cylinder body (1). The oil inlet and outlet port is connected by a first hydraulic oil inlet and outlet pipe (4). The first hydraulic oil inlet and outlet pipe (4) is provided on the inner end surface of one side of the oil pump (3). A second hydraulic oil inlet and outlet pipe (6) is provided on the inner end surface of the other side of the oil pump (3). A first electromagnetic control valve (5) is provided at the outer end of the first hydraulic oil inlet and outlet pipe (4). A second electromagnetic control valve (7) is provided at the outer end of the second hydraulic oil inlet and outlet pipe (6). A suction piston (8) is provided on the inner surface of the oil pump (3).

2. The reset structure of a plunger oil cylinder according to claim 1, characterized in that: The upper end of the suction piston (8) is provided with a hinge seat (9), and a reciprocating connecting rod (10) is hinged inside the hinge seat (9).

3. The reset structure of a plunger oil cylinder according to claim 2, characterized in that: The upper surface of the reciprocating connecting rod (10) is fixedly connected to a bushing (11), and the inner surface of the bushing (11) is connected to an eccentric shaft (12) through a bearing.

4. The reset structure of a plunger oil cylinder according to claim 3, characterized in that: The outer surface of the oil pump (3) is fixed with a U-shaped seat (13), the shaft of the eccentric shaft (12) is connected to the inner surface of the U-shaped seat (13) by a bearing, and the outer end of the U-shaped seat (13) is fixed with a drive motor (14).

5. A reset structure for a plunger cylinder according to claim 4, characterized in that: The drive shaft end face of the drive motor (14) is fixedly mounted on the inner surface of the eccentric shaft (12).

6. The reset structure of a plunger oil cylinder according to claim 4, characterized in that: The drive shaft end face of the drive motor (14) is provided with a square protrusion (15), and the end face of the eccentric shaft (12) is provided with a square groove. The outer surface of the square protrusion (15) is slidably engaged with the inner surface of the square groove.

7. The reset structure of a plunger oil cylinder according to claim 1, characterized in that: The outer surface of the suction piston (8) is fixed with a sealing ring, which is in close contact with the inner surface of the oil pump (3).

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