A multifunctional intelligent hydraulic digital valve

Abstract

The present invention discloses a multifunctional intelligent hydraulic digital valve, which has the functions of energy recovery, fault self-diagnosis, flow monitoring and remote communication, and belongs to the field of digital hydraulics. The invention converts the kinetic energy of hydraulic oil into electrical energy, which not only meets the adjustment requirements of the digital valve during power failure, but also reduces the energy loss during the adjustment process, and further converts and utilizes the "useless" energy; the digital valve of the present invention can indirectly monitor the flow of the digital valve through the change of the generated current during the self-generation process, eliminating the use of a physical flow meter and reducing the design and production costs of the hydraulic system; the digital valve of the present invention can determine whether the digital valve has any fault according to the change of the generated current during the adjustment process, which greatly reduces the difficulty of troubleshooting the hydraulic system and is conducive to timely and rapid repair of the hydraulic system when a fault occurs.

Description

Technical Field

[0001] The present invention relates to the field of hydraulics and digital hydraulics, and in particular to a digital valve with energy recovery, flow monitoring, fault detection and remote communication functions. Background Art

[0002] As the core technology to support heavy and extra-large loads, hydraulic technology is widely used in aerospace, shipbuilding, heavy machinery and other related equipment. The traditional hydraulic industry has always been difficult to make deeper breakthroughs in the face of leakage, high energy consumption, and inconvenient maintenance. With the development of China's Internet and the proposal of "Made in China 2025", it is of great significance to integrate existing semiconductor and Internet technologies, push hydraulic technology to high-end technology industries, break industry barriers, and realize the upgrading of the hydraulic industry.

[0003] In the digitalization process of the hydraulic industry, digital valves rely on power electronics technology to adjust flow, direction, pressure and other indicators during application. However, in actual application, the power supply is heavily dependent on the external power supply system, and most of the use environment is outdoors. The power supply and transmission links are in a harsh environment, which is prone to short circuits, wire damage, etc., causing power outages. As a result, the power supply is unstable, which seriously limits the role of digital valves in hydraulic systems. At the same time, when the power is cut off due to force majeure, the original digital valve will stop working immediately and it is difficult to adjust the function. In addition, according to statistics, in the existing hydraulic system, more than 75% of the hydraulic system failures are caused by valve body failures, and it is difficult to determine which specific component is faulty during troubleshooting. Most repairs rely on disassembly and troubleshooting one by one, which greatly reduces maintenance efficiency. Summary of the invention

[0004] The present invention provides a digital valve with flow monitoring, fault self-diagnosis, energy recovery and remote communication functions. The digital valve mainly comprises a micro generator (5), a control panel (2), a motor (3), a valve body (4) and a battery (1). By taking advantage of the characteristic that kinetic energy exists in the hydraulic system due to the flow of liquid, a part of the kinetic energy of the hydraulic oil in the normally working hydraulic system is collected, so as to reduce the energy loss in the flow adjustment process and collect and store the energy loss generated by the original flow adjustment for use in the digital valve adjustment. When the blades of the micro generator (5) are impacted by the flow of liquid, they will generate rotational motion, thereby generating kinetic energy for the micro generator (5). The micro generator (5) converts the kinetic energy generated by the blades into electrical energy and outputs it to the control panel (2). The control panel (2) processes the obtained current according to a pre-set program. There are two main functions of the current. One is to serve as a signal to provide a basis for flow monitoring and fault diagnosis (firstly, the current is detected and compared to determine whether the digital valve has a fault. If a fault occurs, an alarm signal is sent; if it is normal, the real-time flow through the digital valve is obtained through processing according to the size of the current). Another method is to store the electric energy in a storage battery (1), and to provide electric energy supplement to the storage battery (1) in real time during the operation of the digital valve. When the digital valve is cut off due to external interference, the electric energy can be stored in the storage battery (1) to supply power to the valve in time, so as to maintain the normal operation of the digital valve for a period of time.

[0005] The specific technical solutions are as follows:

[0006] The digital valve is installed in the required hydraulic circuit, and the hydraulic circuit works as required. At this time, the hydraulic oil flows through the liquid flow of the digital valve, driving the blades of the micro-generator (5) to rotate and generate kinetic energy. Further, the micro-generator (5) converts the kinetic energy generated by the blades into electrical energy and transmits it to the control panel (2). Further, the control panel (2) receives the current passing through the micro-generator (5), and judges the current according to the designed circuit and program operation scheme. Further, the control panel (2) outputs information such as digital valve failure and flow rate according to the current. Further, the control panel (2) processes the current and voltage and transmits them to the battery (1), converting the kinetic energy of the hydraulic oil into electrical energy, and then converting it into chemical energy of the battery (1) for storage. Further, when the external power supply of the digital valve stops, the power supply of the control panel (2) is provided by the battery (1), so as to realize power supply in emergency.

[0007] The creativity of the present invention is mainly reflected in:

[0008] (1) The present invention realizes emergency adjustment of the digital valve when the external power supply of the digital valve fails or stops supplying power, by relying on the electrical energy converted and stored from the kinetic energy of the hydraulic oil when the hydraulic system is operating normally.

[0009] (2) The present invention realizes that the digital valve can generate electricity for its own use only by relying on its own components without the need for external power supply, and the excess electric energy is stored in a battery for use in emergency situations.

[0010] (3) The present invention realizes the detection of flow in the hydraulic circuit without the aid of a flow meter, thereby greatly reducing the design and manufacturing costs of the hydraulic system.

[0011] (4) The present invention greatly facilitates the inspection and maintenance of the hydraulic system, making it very easy to locate the fault location in the hydraulic system, thereby reducing maintenance costs and time. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 The overall principle diagram of a multifunctional intelligent hydraulic digital valve of the present invention (the valve body part of the main view is a cross-section view)

[0013] Figure 2 A partial enlarged cross-sectional view of a valve body of a multifunctional intelligent hydraulic digital valve of the present invention

[0014] Figure 3 A partial enlarged view of the blade part of a multifunctional intelligent hydraulic digital valve of the present invention

[0015] Markings in the figure: battery (1), control panel (2), motor (3), hydraulic valve body (4), micro generator (5), rolling bearing (6), generator blade (7).

Claims

1. A hydraulic digital valve with flow monitoring, fault self-diagnosis, energy recovery and remote communication functions, characterized in that: The invention is composed of a storage battery (1), a control panel (2), a motor (3), a valve body (4) and a micro generator (5); the storage battery (1), the motor (3), the micro generator (5) and the control panel (2) are connected via a data line; a communication module is integrated on the control panel (2); the motor (3) and the valve core of the valve body (4) are connected via a transmission device; the micro generator blade (7) is placed inside the flow channel of the digital valve body, and the blade (7) is connected to the shaft via a bearing (6) to reduce friction; the blade (7) of the micro generator (5) is built into the digital valve body (4); when the hydraulic system starts to work, the flow of hydraulic oil drives the blade (7) of the micro generator (5) to rotate, thereby providing kinetic energy for the micro generator (5), and the kinetic energy is converted into electrical energy by the micro generator (5); The micro generator (5) is connected to the control panel (2) and integrates the current and transmits it to the storage battery (1), storing the electric energy for temporary use when the digital valve is powered off; the strength and value of the current output by the micro generator (5) when generating electricity can reflect the size of the flow in the valve body (4) and its value, and the current output by the control panel (2) can reflect the size of the real-time flow after correction; when the digital valve is displayed in the working state but there is no current output, it proves that the digital valve is blocked and should be repaired; when the digital valve can be adjusted and operated but there is no current change, it proves that the valve core of the digital valve is stuck.

2. The hydraulic digital valve according to claim 1, wherein the digital valve has an energy recovery function, characterized in that When hydraulic oil flows inside the valve body, the liquid flow drives the micro-generator blades (7) to rotate, converting the kinetic energy of the hydraulic oil into electrical energy. The current and voltage are integrated through the control panel (2) and stored in the battery (1). When the digital valve is powered off, the control panel (2) receives a power-off signal and connects the power-on interface to the battery (1), providing emergency power for the operation of the digital valve.

3. The hydraulic digital valve according to claim 1, wherein the digital valve has a fault detection function, characterized in that When the digital valve has a blockage, stuck or other related faults, it can self-detect and alarm in real time; when the digital valve is blocked by oil impurities, the flow of hydraulic oil passing through the digital valve will be extremely reduced or even zero, further causing the rotation speed of the micro-generator blades (7) to decrease or stop rotating, thereby causing the current output by the micro-generator (5) to be inconsistent with the normal value or even zero, and it can be judged that the digital valve cannot flow due to the blockage, and the control panel (2) further detects the abnormality and issues a warning signal to prompt repair; if the valve core is stuck, the flow in the digital valve body will not change, the flow acting on the blades (7) of the micro-generator (5) will not change, and the current output by the micro-generator (5) will not change. The current output by the micro-generator (5) and the signal to the motor (3) are compared in the control panel (2). If they cannot change synchronously, the valve core is stuck.

4. The hydraulic digital valve according to claim 1, characterized in that: The control panel (2) has the functions of communication, software program operation, current and voltage integration, etc., so as to be used in conjunction with digital valve flow monitoring, fault diagnosis and remote communication, etc.

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