Oil cylinder opposite vertex demonstration hydraulic device

Abstract

The utility model belongs to the field of hydraulic devices, particularly relates to an oil cylinder opposite vertex demonstration hydraulic device, and aims to solve the problem that the flexibility of a hydraulic system and the control performance of equipment are limited due to the fact that an existing device cannot achieve free switching and simultaneous control of pressure and position control. An oil tank is fixedly arranged in the first box body; the pump control mechanism is arranged on the oil tank and is used for respectively controlling the two oil cylinders to carry out pressure closed-loop control and controlling the output force of the oil cylinders to be constant; the valve control mechanism is arranged on the fixing frame and used for controlling the two oil cylinders to conduct position closed-loop control and controlling the position precision of the oil cylinders. Through the combination of the pump control mechanism and the valve control mechanism, double accurate control over the pressure and the position of the oil cylinder is achieved, free switching can be achieved, the stability and the flexibility of a hydraulic system are improved, and the control performance and the reliability of the whole equipment are remarkably enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic devices, in particular to an oil cylinder top-to-top demonstration hydraulic device. Background Art

[0002] With the development of hydraulic technology, controlling the movement of cylinders has become increasingly important, and the performance of controllers has also become more prominent. This demonstration hydraulic system can verify the performance of the controller in advance and better optimize the cylinder controller control program.

[0003] At present, the existing hydraulic devices for top-to-top demonstration of cylinders usually only have a single valve-controlled position control function, and cannot achieve free switching and simultaneous control of pressure and position control, thereby limiting the flexibility of the hydraulic system and the control performance of the overall equipment. Utility Model Content

[0004] The purpose of the utility model is to solve the shortcomings of the prior art that the free switching and simultaneous control of pressure and position control cannot be achieved, thereby limiting the flexibility of the hydraulic system and the control performance of the equipment, and to propose a hydraulic device for demonstrating the top of the cylinder.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A hydraulic device for demonstrating oil cylinder top-to-top, comprising:

[0007] The first and second boxes are provided with an oil tank fixedly arranged inside the first box, two fixing frames are symmetrically fixedly arranged inside the second box, and two oil cylinders are symmetrically fixedly arranged on the top of the second box;

[0008] The pump control mechanism is installed on the oil tank and is used to control the two oil cylinders to perform pressure closed-loop control to keep the output force of the oil cylinders constant;

[0009] The valve control mechanism is arranged on the fixed frame and is used to control the two cylinders respectively for position closed-loop control to control the position accuracy of the cylinders.

[0010] In one possible design, the pump control mechanism includes two valve bodies symmetrically fixed on the top of the oil tank, a gear pump is fixedly installed on the top of the two valve bodies, a servo motor is installed on one side of the two gear pumps, an oil pump is fixedly installed on the bottom of the two valve bodies in the oil tank, an oil pipe is fixedly connected to one side of the oil pump, a speed regulating valve is fixedly installed on the top of the two valve bodies next to the gear pump, a solenoid valve is fixedly installed on the top of the two speed regulating valves, a No. 1 pressure sensor is fixedly installed on one side of the two valve bodies, and a No. 1 overflow valve is fixedly installed on the top of the two valve bodies next to the speed regulating valve.

[0011] In one possible design, the valve control mechanism includes two valve blocks fixedly arranged on the top of two fixed frames, a No. 2 overflow valve is fixedly arranged on the top of the two valve blocks, an electromagnetic steering valve is fixedly arranged on the top of the two No. 2 overflow valves, a servo valve is fixedly arranged on the top of the two valve blocks next to the No. 2 overflow valve, a stop valve is fixedly arranged on both sides of the No. 2 overflow valve and the servo valve, two No. 2 pressure sensors are staggered on the front sides of the two valve blocks, and a one-way valve is fixedly arranged on one side of the two valve blocks.

[0012] In a possible design, a cooler is fixedly installed on one side of the oil tank, and an oil return filter is fixedly installed on the top of the oil tank next to the valve body.

[0013] In a possible design, a displacement sensor is fixedly provided at one end of the two oil cylinders that is away from each other.

[0014] In a possible design, a frame cover is fixedly provided on the top outer ring of the second box body, a cover plate is hingedly connected to the top of the frame cover through a hinge, and two handles are symmetrically fixed on the top of the cover plate.

[0015] In this application, when starting to use, first ensure that all electrical connections and hydraulic lines are connected correctly and are tightened, then check whether there is enough oil in the tank and replenish it if necessary, then confirm that all sensors (such as No. 1 pressure sensor, No. 2 pressure sensor and displacement sensor) are working properly, and then turn on the power of the cooler to ensure that it is in working condition;

[0016] After all preparations are completed, the entire device is connected to the power supply, and then the target pressure values of the two cylinders are set through the control system, and then the servo motor is started. The servo motor drives the gear pump to start working. At this time, the oil pump draws oil from the oil tank and transports it to the valve body and valve block through the oil pipe. After the oil flow is adjusted by the speed control valve, it enters the solenoid valve. The solenoid valve switches the oil circuit according to the control signal and supplies the oil to the corresponding oil cylinder. The two cylinders begin to extend or retract under the action of pressure. At the same time, the No. 1 pressure sensor monitors the pressure in the cylinder in real time. When the actual pressure reaches or exceeds the target value, the No. 1 relief valve opens to release excess oil and keep the system pressure constant. During this process, the control system continuously monitors the reading of the No. 1 pressure sensor and adjusts the speed of the servo motor as needed to keep the pressure within the set range.

[0017] Then, the control system sets the target position values of the two cylinders respectively. After passing through the No. 2 relief valve and the electromagnetic steering valve in the valve block, the oil enters the servo valve. The servo valve accurately controls the direction and flow of the oil according to the feedback signal of the displacement sensor and the instructions issued by the control system, thereby controlling the extension or retraction speed of the cylinder. During the movement of the two cylinders, the displacement sensor monitors their positions in real time and feeds the data back to the control system. In this process, the control system continuously adjusts the opening of the servo valve according to the feedback data of the displacement sensor until the cylinder reaches the target position. At the same time, the No. 2 pressure sensor also continuously monitors the system pressure to ensure safety.

[0018] During system operation, the return oil filter continuously filters the oil returned from the cylinder to remove impurities, and the cooler continuously cools the oil to prevent the oil temperature from being too high.

[0019] The utility model has the following beneficial effects:

[0020] The utility model realizes independent and precise closed-loop pressure control of the two oil cylinders through the setting of the pump control mechanism, which can keep the output force of the oil cylinders constant, effectively improves the stability and control accuracy of the hydraulic system, and thus enhances the performance and reliability of the overall equipment;

[0021] The utility model realizes precise closed-loop control of the positions of the two oil cylinders through the setting of the valve control mechanism, ensures the accuracy of the oil cylinder movement and the position precision, and further improves the flexibility and control performance of the hydraulic system;

[0022] The utility model realizes dual precise control of oil cylinder pressure and position and can switch freely by combining the pump control mechanism with the valve control mechanism, which not only improves the stability and flexibility of the hydraulic system, but also significantly enhances the control performance and reliability of the overall equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the overall structure of a hydraulic device for demonstrating oil cylinder top-to-top proposed by the utility model;

[0024] Figure 2 This is a schematic diagram of the internal structure of the No. 2 box of a hydraulic device for demonstrating oil cylinder top-to-top collision proposed by the utility model;

[0025] Figure 3 This is a schematic diagram of the valve control mechanism structure of a hydraulic device for demonstrating oil cylinder top-to-top operation proposed by the utility model;

[0026] Figure 4 This is a schematic diagram of the internal structure of the No. 1 box of a hydraulic device for demonstrating oil cylinder top-to-top operation proposed in the utility model;

[0027] Figure 5This is a schematic diagram of the internal component structure of the No. 1 box of a hydraulic device for demonstrating the top-to-bottom of an oil cylinder proposed in the utility model;

[0028] Figure 6 This is a schematic diagram of the pump control mechanism structure of a hydraulic device for demonstrating oil cylinder top-to-top support proposed by the utility model.

[0029] In the figure: 1. Box body No. 1; 101. Oil tank; 102. Return oil filter; 103. Cooler; 2. Box body No. 2; 3. Valve body; 301. Speed regulating valve; 302. Solenoid valve; 303. Pressure sensor No. 1; 304. Overflow valve No. 1; 305. Oil pump; 306. Gear pump; 307. Servo motor; 4. Fixed bracket; 5. Valve block; 501. Overflow valve No. 2; 502. Solenoid steering valve; 503. Servo valve; 504. Stop valve; 505. Pressure sensor No. 2; 506. Check valve; 6. Frame cover; 7. Oil cylinder; 8. Displacement sensor; 9. Cover plate. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Example

[0031] Reference Figure 1-6 , a hydraulic device comprising:

[0032] Box No. 1 1 and box No. 2 2, an oil tank 101 is fixedly set inside box No. 1 for storing oil, and two fixing frames 4 are symmetrically fixed inside box No. 2 2. The fixing frames 4 are used to support and fix the valve control mechanism in the hydraulic system. At the top of box No. 2 2, two oil cylinders 7 are symmetrically fixed. These two oil cylinders 7 are the actuators of the hydraulic system, responsible for output pressure and position control.

[0033] The pump control mechanism is arranged on the oil tank 101 and is used to control the two oil cylinders 7 to perform pressure closed-loop control respectively to ensure that the output force of the oil cylinder 7 is constant. The pump control mechanism includes two valve bodies 3 symmetrically fixedly arranged on the top of the oil tank 101. A gear pump 306 is fixedly arranged on the top of each valve body 3. One side of the gear pump 306 is connected to the servo motor 307 through a transmission device. The drive of the servo motor 307 enables the gear pump 306 to start working. The bottom of each valve body 3 is located in the oil tank 101 and is fixedly provided with an oil pump 305. The oil pump 305 draws oil from the oil tank 101 through an oil pipe. On one side of the oil pump 305, the oil pipe is fixedly connected to the valve body 3 Internally, a speed regulating valve 301 is fixedly provided on the top of the two valve bodies 3 next to the gear pump 306 for adjusting the flow rate of the oil. A solenoid valve 302 is fixedly provided on the top of the speed regulating valve 301. The solenoid valve 302 switches the oil circuit according to the control signal and supplies the oil to the corresponding oil cylinder 7. On one side of each valve body 3, a No. 1 pressure sensor 303 is fixedly provided for real-time monitoring of the pressure in the oil cylinder 7. A No. 1 overflow valve 304 is fixedly provided on the top of each valve body 3 next to the speed regulating valve 301. When the actual pressure reaches or exceeds the target value, the No. 1 overflow valve 304 opens to release excess oil and keep the system pressure constant.

[0034] The valve control mechanism is set on the fixed frame 4 and is used to control the two oil cylinders 7 to perform position closed-loop control respectively to ensure the position accuracy of the oil cylinder 7. The valve control mechanism includes two valve blocks 5 fixedly set on the top of the fixed frame 4. A No. 2 relief valve 501 is fixedly set on the top of each valve block 5 to release the pressure when the system pressure is too high. A solenoid steering valve 502 is fixedly set on the top of the No. 2 relief valve 501 to control the flow direction of the oil. A servo valve 503 is fixedly set on the top of each valve block 5 next to the No. 2 relief valve 501. The servo valve 503 accurately controls the flow direction and flow of the oil according to the feedback signal of the displacement sensor 8 and the instructions issued by the control system, thereby controlling the extension or retraction speed of the cylinder 7. A stop valve 504 is fixedly set on both sides of the No. 2 overflow valve 501 and the servo valve 503 to cut off the oil circuit when needed. On the front side of the two valve blocks 5, two No. 2 pressure sensors 505 are staggered and arranged to monitor the system pressure. On one side of each valve block 5, a one-way valve 506 is fixed to prevent the oil from flowing back.

[0035] In order to maintain the temperature and cleanliness of the hydraulic oil, a cooler 103 is fixedly installed on one side of the oil tank 101 for cooling the hydraulic oil. A return oil filter 102 is fixedly installed on the top of the oil tank 101 next to the valve body 3 for filtering the oil returned from the cylinder 7 and removing impurities.

[0036] The present application can be used in the technical field of hydraulic devices for demonstrating top-to-bottom cylinders, and can also be used in other fields applicable to the present application. Example

[0037] On the basis of embodiment one, embodiment two also includes: a hydraulic device for demonstrating top-to-top cylinders, which is applied to the technical field of hydraulic devices for demonstrating top-to-top cylinders. In order to monitor the position of the cylinder 7 in real time, displacement sensors 8 are fixedly provided at one end of the two cylinders 7 that are away from each other. The displacement sensors 8 feed back real-time data to the control system to ensure the position accuracy of the cylinder 7.

[0038] In addition, a frame cover 6 is fixedly provided on the top outer ring of the No. 2 box body 2 to protect the internal hydraulic components. The top of the frame cover 6 is hinged with a cover plate 9 through a hinge. Two handles are symmetrically fixed on the top of the cover plate 9 to facilitate opening and closing the cover plate 9 and maintenance and repair of the hydraulic device.

[0039] However, as is well known to those skilled in the art, the working principles and wiring methods of pressure sensor No. 1 303, oil pump 305, servo motor 307, pressure sensor No. 2 505 and displacement sensor 8 are commonplace, and are all conventional means or common knowledge, so they will not be elaborated here. Those skilled in the art can make any selections according to their needs or convenience.

[0040] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A hydraulic device for demonstrating oil cylinder against top, characterized in that: include: A first box (1) and a second box (2), wherein an oil tank (101) is fixedly provided inside the first box (1), two fixing frames (4) are symmetrically fixedly provided inside the second box (2), and two oil cylinders (7) are symmetrically fixedly provided on the top of the second box (2); A pump control mechanism is provided on the oil tank (101) and is used to control the two oil cylinders (7) to perform pressure closed-loop control, thereby controlling the output force of the oil cylinders (7) to be constant; The valve control mechanism is arranged on the fixed frame (4) and is used to control the two oil cylinders (7) respectively to perform position closed-loop control and control the position accuracy of the oil cylinders (7).

2. The hydraulic device for demonstrating oil cylinder against oil cylinder according to claim 1, characterized in that: The pump control mechanism comprises two valve bodies (3) symmetrically fixedly arranged on the top of the oil tank (101), a gear pump (306) being fixedly arranged on the top of each of the two valve bodies (3), a servo motor (307) being driven and arranged on one side of each of the two gear pumps (306), an oil pump (305) being fixedly arranged on the bottom of each of the two valve bodies (3) located in the oil tank (101), an oil pipe being fixedly connected to one side of the oil pump (305), a speed regulating valve (301) being fixedly arranged on the top of each of the two valve bodies (3) located next to the gear pump (306), a solenoid valve (302) being fixedly arranged on the top of each of the two speed regulating valves (301), a No. 1 pressure sensor (303) being fixedly arranged on one side of each of the two valve bodies (3), and a No. 1 overflow valve (304) being fixedly arranged on the top of each of the two valve bodies (3) located next to the speed regulating valve (301).

3. The hydraulic device for demonstrating oil cylinder against oil cylinder according to claim 1, characterized in that: The valve control mechanism comprises two valve blocks (5) fixedly arranged on the tops of two fixing frames (4), a No. 2 overflow valve (501) being fixedly arranged on the tops of the two valve blocks (5), a solenoid steering valve (502) being fixedly arranged on the tops of the two No. 2 overflow valves (501), a servo valve (503) being fixedly arranged on the tops of the two valve blocks (5) next to the No. 2 overflow valve (501), a stop valve (504) being fixedly arranged on both sides of the No. 2 overflow valve (501) and the servo valve (503), two No. 2 pressure sensors (505) being staggered on the front sides of the two valve blocks (5), and a one-way valve (506) being fixedly arranged on one side of the two valve blocks (5).

4. The hydraulic device for demonstrating oil cylinder against oil cylinder according to claim 2, characterized in that: A cooler (103) is fixedly provided on one side of the oil tank (101), and an oil return filter (102) is fixedly provided on the top of the oil tank (101) next to the valve body (3).

5. The hydraulic device for demonstrating oil cylinder against oil cylinder according to claim 1, characterized in that: A displacement sensor (8) is fixedly provided at one end of each of the two oil cylinders (7) that is away from each other.

6. The hydraulic device for demonstrating oil cylinder against oil cylinder according to claim 1, characterized in that: A frame cover (6) is fixedly provided on the outer ring of the top of the second box body (2), a cover plate (9) is hingedly connected to the top of the frame cover (6) via a hinge, and two handles are symmetrically fixedly provided on the top of the cover plate (9).

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