阅读说明：本技术 一种用于驱动阀门装置的液压控制单元及其控制方法 (Hydraulic control unit for driving valve device and control method thereof ) 是由 陈继业 齐卫红 左立庆 凌扬洋 蒋光超 张斌 于 2019-10-18 设计创作，主要内容包括：本发明提供了一种用于驱动阀门装置的液压控制单元及其控制方法,该液压控制单元由控制器、直流无刷电机、集成阀块和摆动油缸组成。所述的集成阀块包括内嵌的定量柱塞泵、增压油箱、溢流阀、过滤器、安全阀、旋转直驱换向阀、放气活门、加注油口、压力传感器和旁通阀。电机与定量柱塞泵采用浸油设计,一根主轴联结,电机主轴直接带动定量柱塞泵转子旋转,完成柱塞泵吸油和排油的过程,输出油液直接控制摆动油缸的速度。控制器采集传感器信号,并根据控制指令控制旋转直驱换向阀,进而控制摆动油缸转动方向。本发明作为阀门驱动装置,具有重量轻体积小、高度集成化、结构简单易于维修的优点。(The invention provides a hydraulic control unit for driving a valve device and a control method thereof. The integrated valve block comprises a quantitative plunger pump, a pressurizing oil tank, an overflow valve, a filter, a safety valve, a rotary direct-drive reversing valve, an air bleeding valve, an oil filling port, a pressure sensor and a bypass valve which are embedded in the integrated valve block. The motor and the quantitative plunger pump adopt an oil immersion design, one main shaft is connected, the motor main shaft directly drives the rotor of the quantitative plunger pump to rotate, the processes of oil suction and oil discharge of the plunger pump are completed, and the speed of the swing oil cylinder is directly controlled by output oil. The controller collects signals of the sensor and controls the rotary direct-drive reversing valve according to a control instruction so as to control the rotation direction of the swing oil cylinder. The valve driving device has the advantages of light weight, small volume, high integration, simple structure and easy maintenance.)

1. A hydraulic control unit for driving a valve device is characterized in that the control unit comprises a controller (1), a direct current brushless motor (2), an integrated valve block (3) and a swing oil cylinder (4); the direct current brushless motor (2) is connected with the controller (1), the output end of the direct current brushless motor (2) is connected to the integrated valve block (3), and the integrated valve block (3) controls the valve device by controlling the rotation of the swing oil cylinder (4).

2. The hydraulic control unit for driving a valve device according to claim 1, wherein a fixed displacement plunger pump (5), an oil tank (6), an overflow valve (7), a filter (8), a safety valve (9), a rotary direct-drive reversing valve (10), a bleed valve (11), a high pressure sensor (12), a low pressure sensor (13) and a bypass valve (14) are arranged in the integrated valve block (3);

the output end of the direct current brushless motor (2) is connected to a rotary direct-drive reversing valve (10), and the rotary direct-drive reversing valve (10) is connected to the swing oil cylinder (4).

3. The hydraulic control unit for driving a valve device according to claim 1, characterized in that: the direct current brushless motor (2) is an oil immersion type motor.

4. The valve-driving apparatus hydraulic control unit according to claim 1, characterized in that: the oil pump (5) is an embedded oil pump.

5. The hydraulic control unit for driving a valve device according to claim 1, characterized in that: the direct current brushless motor (2) and the integrated valve block (3) are static seals.

6. The hydraulic control unit for driving a valve device according to claim 1, characterized in that: the swing oil cylinder (4) is a hydraulic actuating element with a limited rotation angle.

7. The hydraulic control unit for driving a valve device according to claim 1, characterized in that: the oil tank (6) is a closed type pressurization oil tank.

8. The control method of a hydraulic control unit for driving a valve device according to claim 1, characterized in that: when a first instruction signal of the hydraulic control unit is given, the controller controls the motor (2) to start and the valve core of the rotary direct-drive reversing valve (10) to rotate, so that the swing oil cylinder (4) rotates forwards, and stops when an external in-place signal is received; when a second instruction of the hydraulic control unit is given, the valve core of the swing oil cylinder (4) rotates reversely, so that the swing oil cylinder (4) rotates reversely, and stops when an external in-place signal is received, and the rotating speed of the swing oil cylinder is adjusted through the rotating speed of the motor required to be adjusted.

Technical Field

The invention relates to a hydraulic power system, in particular to a valve device for driving a valve.

Background

The valve driving device is used for driving the valve to open and close stably and without clamping stagnation in a specified time. The device comprises a hydraulic control unit, a driving mechanism, a sealing element and the like, wherein the hydraulic control unit is a key component for driving the valve to act. The traditional hydraulic energy of the valve driving device mainly adopts a scheme of centralized hydraulic oil source, but the distribution of the positions of all valves is relatively dispersed, so that the hydraulic energy of the valves has the defects of more pipelines, large occupied space, large noise, difficult maintenance, large loss, high heat productivity and the like.

Disclosure of Invention

In view of the above-described problems, an object of the present invention is to provide a hydraulic control unit for driving a valve device with high integration, light weight, and easy maintenance.

The technical scheme of the invention is as follows: a hydraulic control unit for driving a valve device comprises a controller 1, a direct current brushless motor 2, an integrated valve block 3 and a swing oil cylinder 4; the direct current brushless motor 2 is connected with the controller 1, the output end of the direct current brushless motor 2 is connected to the integrated valve block 3, and the integrated valve block 3 controls the valve device by controlling the rotation of the swing oil cylinder 4.

The integrated valve block 3 is internally provided with a quantitative plunger pump 5, an oil tank 6, an overflow valve 7, a filter 8, a safety valve 9, a rotary direct-drive reversing valve 10, an air bleed valve 11, a high-pressure sensor 12, a low-pressure sensor 13 and a bypass valve 14;

the output end of the direct current brushless motor 2 is connected to a rotary direct-drive reversing valve 10, and the rotary direct-drive reversing valve 10 is connected to the swing oil cylinder 4.

The brushless DC motor 2 is an oil-immersed motor.

The oil pump 5 is an embedded oil pump.

The direct current brushless motor 2 and the integrated valve block 3 are static seals.

The swing oil cylinder 4 is a hydraulic actuator with a limited rotation angle.

The oil tank 6 is a closed type pressurization oil tank.

The invention also provides a control method of the hydraulic control unit for driving the valve device, when a first instruction signal of the hydraulic control unit is given, the controller controls the motor 2 to start and rotate the valve core of the direct-drive reversing valve 10, so that the swing oil cylinder 4 rotates in the positive direction, and stops when an external in-place signal is received; when a second instruction of the hydraulic control unit is given, the valve core of the swing oil cylinder 4 rotates reversely, so that the swing oil cylinder 4 rotates reversely, and stops when an external in-place signal is received, and the rotating speed of the swing oil cylinder is adjusted through the rotating speed of the motor required to be adjusted. The method specifically comprises the following steps: when the controller receives the control instruction 1, the controller starts the motor. The rotary direct-drive reversing valve is driven to rotate in a positive direction, when the controller receives an in-place signal, the controller controls the motor to stop rotating, and the rotary direct-drive reversing valve returns to a zero position; when the controller receives the control command 2, the controller starts the motor. The rotary direct-drive reversing valve is driven to rotate, so that the swing oil cylinder rotates reversely, and when the controller receives an in-place signal, the controller controls the motor to stop rotating and the rotary direct-drive reversing valve to return to a zero position. The rotating speed of the motor is controlled to drive the oil pump to adjust the flow, the pressure of two cavities of the swing oil cylinder is directly controlled, and the rotating speed of the swing oil cylinder can be controlled. The brushless direct current motor and the plunger pump share one main shaft, the motor main shaft directly drives the plunger pump to rotate, the brushless direct current motor is of an oil immersion type structure and is connected with the integrated valve block in a static sealing mode, and internal oil leakage is avoided. The integrated valve block is provided with a quantitative plunger pump, a pressurizing oil tank, an overflow valve, a filter, a safety valve, a rotary direct-drive reversing valve, an air release valve, a high-pressure sensor, a low-pressure sensor and a bypass valve. The bypass valve in the concentration valve block has a manual function, and when the bypass valve is opened, the high-pressure cavity and the low-pressure cavity of the swing oil cylinder are communicated, and the valve driving device can be driven manually.

Compared with the prior art, the invention is characterized in that: high integration, small volume and light weight; the brushless direct current motor and the quantitative plunger pump share one main shaft, the oil immersion structure design is adopted, and the brushless direct current motor and the quantitative plunger pump are statically sealed with the integrated valve block, so that oil leakage is avoided. The swing oil cylinder is used as an actuating element of the rotary motion, and the swing oil cylinder has the advantages of compact structure and convenience in installation. The quantitative plunger pump, various hydraulic valves, the filter and the pressure sensor are embedded in the integrated valve block, so that the integrated valve block is compact in overall structure, and the weight of the integrated valve block can be greatly reduced. The speed of the swing oil cylinder is directly controlled by the oil pump, the moving direction of the swing oil cylinder is controlled by the rotary direct-drive reversing valve, and the swing oil cylinder has the advantages of low loss, high efficiency, flexibility and convenience in control and the like.

Drawings

FIG. 1 is a schematic diagram of a hydraulic control unit of the valve actuator of the present invention;

FIG. 2 is a block diagram of the oil tank of the hydraulic control unit of the valve actuator of the present invention;

FIG. 3 is a hydraulic schematic of the hydraulic control unit of the valve actuator of the present invention;

FIG. 4 is an overall structural view of a hydraulic control unit of the valve driving apparatus of the present invention;

in the figure, 1-controller, 2-brushless direct current motor, 3-integrated valve block, 4-swing oil cylinder, 5-quantitative plunger pump, 6-pressurizing oil tank, 7-overflow valve, 8-filter, 9-safety valve, 10-direct drive reversing valve, 11-air release valve, 12-high pressure sensor, 13-low pressure sensor, 14-bypass valve, 15-oil tank piston, 16-sealing ring, 17-pressurizing spring and 18-oil tank cover plate.

Detailed Description

The present invention will be described in further detail with reference to the following drawings, which should not be construed as limiting the invention.