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CN-121976984-A - Electric control liquid filling valve and control method thereof

CN121976984ACN 121976984 ACN121976984 ACN 121976984ACN-121976984-A

Abstract

The application relates to the technical field of fluid control, in particular to an electric control liquid filling valve and a control method thereof, wherein the electric control liquid filling valve comprises a valve body, a priority valve, an electromagnetic valve, a pressure sensor and a selection valve, the valve body is provided with a main oil way, a liquid filling port and an unloading port, the priority valve, the electromagnetic valve and the selection valve are sequentially arranged and communicated along the main oil way, and the liquid filling port is communicated with the priority valve; the oil return port of the electromagnetic valve is communicated with the unloading port, the pressure sensor comprises a lower limit sensor and an upper limit sensor, the lower limit sensor is horizontally arranged, the sensing end of the lower limit sensor is communicated with the main oil way, the upper limit sensor is vertically arranged above the valve body, and the sensing end of the upper limit sensor is communicated with the main oil way. The hydraulic system has the advantages of simplifying the pipeline of the hydraulic system, reducing the leakage risk, adjusting the hydraulic pressure at the working oil port according to the actual situation, and obviously improving the energy utilization efficiency, the response speed and the reliability of the braking system.

Inventors

  • TAO SONG
  • ZHAO WENBO

Assignees

  • 裕泰液压技术(上海)有限公司

Dates

Publication Date
20260505
Application Date
20260313

Claims (9)

  1. 1. An electric control liquid filling valve is characterized by comprising a valve body (1), a priority valve (2), an electromagnetic valve (3), a pressure sensor (4) and a selection valve (5); the valve body (1) is provided with a main oil way (101), a liquid filling port (102) and an unloading port (103); The priority valve (2), the electromagnetic valve (3) and the selection valve (5) are sequentially arranged and communicated along the main oil way (101), and the liquid filling port (102) is communicated with the priority valve (2); The pressure sensor (4) comprises a lower limit sensor (401) and an upper limit sensor (402), wherein the lower limit sensor (401) is horizontally arranged, the induction end of the lower limit sensor is communicated with the main oil way (101), the upper limit sensor (402) is vertically arranged above the valve body (1), and the induction end of the upper limit sensor (402) is communicated with the main oil way (101).
  2. 2. The electric control charging valve according to claim 1, characterized in that a one-way valve (6) is further arranged in the main oil way (101), the one-way valve (6) is located between the priority valve (2) and the electromagnetic valve (3), the one-way valve (6) comprises a valve cavity (601), a valve ball (602) and a spring (603), an oil inlet (604) is formed in one end of the valve cavity (601), an oil outlet (605) is formed in the side wall of the valve cavity (601), the priority valve (2) is communicated with the oil inlet (604), the valve ball (602) is arranged at the oil inlet (604), and the spring (603) is arranged on one side, away from the oil inlet (604), of the valve ball (602.
  3. 3. An electrically controlled charging valve according to claim 2, characterized in that a filter screen (8) is further arranged in the main oil circuit (101), and the filter screen (8) is closely attached to the oil inlet (604) of the valve cavity (601).
  4. 4. An electrically controlled charge valve as set forth in claim 3 wherein said oil inlet (604) is provided with a restrictor plate.
  5. 5. The electric control charging valve according to claim 1, characterized in that the valve body (1) is provided with a first working oil port (10), the priority valve (2) comprises a valve core (201), a hydraulic cavity (7) is formed between the end part of the valve core (201) and the valve body (1), an internal flow passage (202) is arranged in the valve core (201), the internal flow passage (202) is communicated with the charging port (102) and the hydraulic cavity (7), when the hydraulic cavity (7) is filled with oil to a certain amount, the valve core (201) moves, and at the moment, the first working oil port (10) is communicated with the charging port (102).
  6. 6. The electric control filling valve according to claim 1, characterized in that the valve body (1) is further provided with a second working oil port (11) and a third working oil port (12), and the second working oil port (11) and the third working oil port (12) are both communicated with the selection valve (5).
  7. 7. An electrically controlled charging valve according to claim 1, further comprising a relief valve (9), said relief valve (9) being arranged in said valve body (1) and being in communication with said main oil circuit (101) for defining a maximum pressure value of said main oil circuit (101).
  8. 8. An electrically controlled charging valve according to claim 1, characterized in that the solenoid valve (3) is a standard interface two-position three-way solenoid valve or a two-position two-way solenoid valve.
  9. 9. A control method of an electrically controlled charging valve according to any one of claims 1 to 8, comprising the steps of: S1, conveying oil into an electric control charging valve; s2, when the oil touches an upper limit sensor (402), the electronic control liquid filling valve is filled with oil, an oil return port of the electromagnetic valve (3) is opened at the moment, and surplus oil flows out from an unloading port (103); s3, when the working oil port is connected with external equipment and oil consumption begins, the oil quantity in the electric control liquid charging valve begins to decrease, and when the oil quantity is reduced to the pressure reduction or no pressure sensed by the lower limit sensor (401), a feedback signal is fed to an oil pump of the liquid charging port (102), the oil entering of the liquid charging port (102) is increased, and the feedback signal of the upper limit sensor (402) is used for unloading redundant oil; S4, when the external equipment is replaced and the required oil quantity is reduced, the upper limit sensor (402) feeds back a pressure signal, the opening of the electromagnetic valve (3) is reduced, and when the external equipment is replaced and the required oil quantity is increased, the upper limit sensor (402) feeds back a pressure signal, and the opening of the electromagnetic valve (3) is increased.

Description

Electric control liquid filling valve and control method thereof Technical Field The application relates to the technical field of fluid control, in particular to an electric control liquid filling valve and a control method thereof. Background In the field of hydraulic systems, charge valves are important control elements, the performance and reliability of which play a critical role in the proper operation of the overall system. With the continuous development of industrial automation, the hydraulic system has raised higher requirements on the control accuracy, flexibility, cost effectiveness and the like of the liquid filling valve. The performance of the charging valve directly affects the working efficiency, stability and energy consumption of the hydraulic system, so that the research and development of the high-performance charging valve has important significance for improving the overall performance of the hydraulic system and reducing the running cost. In the prior art, a working oil port of a liquid filling valve is communicated with an external device, and certain hydraulic pressure is required for the hydraulic pressure of the working oil port, when the hydraulic pressure reaches the working oil port, certain hydraulic pressure can be formed, and after the hydraulic pressure reaches the oil quantity required by the external device, the excessive hydraulic pressure needs to be unloaded through an unloading valve, so that the stability is maintained. However, when the oil amount or oil pressure required by the subsequent connected equipment is different from that of the previous equipment after the external equipment is replaced, the internal parts or the size of the working oil port are required to be replaced, the cost is increased, the working efficiency is also influenced, and the working adaptability is lower. Disclosure of Invention In order to adjust the flow of the oil quantity at the working oil port according to actual conditions and improve working adaptability, the application aims to provide an electric control filling valve and a control method thereof. In a first aspect, the application provides an electrically controlled charging valve, which adopts the following technical scheme: the valve comprises a valve body, a priority valve, an electromagnetic valve, a pressure sensor and a selection valve; The valve body is provided with a main oil way, a liquid filling port and an unloading port; The priority valve, the electromagnetic valve and the selection valve are sequentially arranged and communicated along the main oil way, and the liquid filling port is communicated with the priority valve; The pressure sensor comprises a lower limit sensor and an upper limit sensor, wherein the lower limit sensor is horizontally arranged, the induction end of the lower limit sensor is communicated with a main oil way, the upper limit sensor is vertically arranged above the valve body, and the induction end of the upper limit sensor is communicated with the main oil way. By adopting the technical scheme, the pressure sensor monitors the pressure of the main oil way in real time and feeds back the pressure to the external control unit, and the control unit automatically controls the opening and closing of the electromagnetic valve, namely the opening size according to preset logic, so that the filling and unloading processes and the oil quantity of the working oil port are accurately managed, equipment with different oil quantity requirements can be adapted according to actual conditions, and the working adaptability is improved. The electric control mode replaces the traditional pure mechanical or hydraulic control, simplifies the pipeline of the hydraulic system, and remarkably improves the energy utilization efficiency, the response speed and the reliability of the braking system. Optionally, still be provided with the check valve in the main oil circuit, the check valve is located between priority valve and the solenoid valve, the check valve includes valve pocket, valve ball and spring, valve pocket one end is equipped with the fluid entry, and the valve pocket lateral wall is equipped with the fluid export, priority valve and fluid entry intercommunication, the valve ball sets up at the fluid entry, the spring is located valve ball and is kept away from fluid entry one side. By adopting the technical scheme, the reverse backflow of oil in the accumulator or other high-pressure oil ways can be effectively prevented when the system stops filling or unloading. The pressure of the main oil way is ensured to be maintained, the system response delay or pressure fluctuation caused by pressure backflow is avoided, and the working stability of the charging valve is ensured. Meanwhile, the check valve adopts a simple valve ball and spring structure, has the advantages of low cost, good sealing performance and sensitive action, and can quickly respond and cut off reverse oil flow. Optionally, a filter s