Search

CN-116006757-B - Electromagnetic valve internal leakage detection device and method based on digital optical fiber sensing amplifier

CN116006757BCN 116006757 BCN116006757 BCN 116006757BCN-116006757-B

Abstract

The invention relates to an electromagnetic valve internal leakage detection device and method based on a digital optical fiber sensing amplifier, which mainly solve the problems that the existing method for detecting the internal leakage of oil drops of a hydraulic electromagnetic valve by manual work is complex in steps, long in time consumption and inaccurate in detection result due to the influence of human factors. The intelligent electromagnetic valve comprises a measuring medium drip nozzle, a digital optical fiber sensing amplifier, an intermediate relay, a container and a computer, wherein the input end of the measuring medium drip nozzle is used for being connected with an oil return port of an electromagnetic valve, the digital optical fiber sensing amplifier is arranged below the measuring medium drip nozzle, the container is arranged below the digital optical fiber sensing amplifier, a wiring end of the digital optical fiber sensing amplifier is used for being connected with an external control power supply, a signal output end of the digital optical fiber sensing amplifier is connected with a positive electrode of a coil KAQ of the intermediate relay, a negative electrode of the coil KAQ is connected with a negative electrode of the wiring end of the digital optical fiber sensing amplifier, one end of a normally open contact KA of the intermediate relay is used for being connected with an external signal power supply, and the other end of the normally open contact KA of the intermediate relay is connected with the computer.

Inventors

  • LIU XINBIN
  • ZHENG JIAN
  • REN WEIDONG
  • DING DENGKE
  • LI JINHAN

Assignees

  • 西安庆安航空试验设备有限责任公司

Dates

Publication Date
20260508
Application Date
20221226

Claims (7)

  1. 1. Electromagnetic valve internal leakage detection device based on digital optical fiber sense amplifier, its characterized in that: The device comprises a measuring medium drip nozzle (1), a digital optical fiber sensing amplifier (2), an intermediate relay, a container (3) and a computer; The input end of the measuring medium drip nozzle (1) is connected with an oil return port of the electromagnetic valve to be detected, the digital optical fiber sensing amplifier (2) is arranged below the output end of the measuring medium drip nozzle (1) and is used for sending out signals when oil drops pass through, and the measuring medium drip nozzle (1) and the digital optical fiber sensing amplifier (2) are both arranged on an external panel; the container (3) is arranged below the digital optical fiber sensing amplifier (2); The wiring terminal of the digital optical fiber sensing amplifier (2) is used for being connected with an external control power supply, the signal output end of the digital optical fiber sensing amplifier (2) is connected with the positive electrode of a coil KAQ of an intermediate relay, the digital optical fiber sensing amplifier is used for enabling a normally open contact KA of the intermediate relay to act within the duration of signal sending of the digital optical fiber sensing amplifier (2), the negative electrode of the coil KAQ of the intermediate relay is connected with the negative electrode of the wiring terminal of the digital optical fiber sensing amplifier, one end of the normally open contact KA of the intermediate relay is used for being connected with an external signal power supply, and the other end of the normally open contact KA is connected with a computer and used for recording and displaying the times of the actions of the normally open contact KA of the intermediate relay.
  2. 2. The electromagnetic valve internal leakage detection apparatus based on the digital optical fiber sensing amplifier according to claim 1, wherein: The action time of the intermediate relay is less than 10ms, and the reset time is less than 5ms.
  3. 3. The electromagnetic valve internal leakage detection apparatus based on digital optical fiber sensing amplifier according to claim 1 or 2, wherein: The digital optical fiber sensing amplifier (2) is a PNP type multipoint photoelectric switch.
  4. 4. The electromagnetic valve internal leakage detection apparatus based on digital optical fiber sensing amplifier according to claim 3, wherein: The container (3) is a measuring cup.
  5. 5. The electromagnetic valve internal leakage detection method based on the digital optical fiber sensing amplifier adopts the electromagnetic valve internal leakage detection device based on the digital optical fiber sensing amplifier according to any one of claims 1-4, and is characterized by comprising the following steps: step 1, sensing oil drops through a digital optical fiber sensing amplifier (2), and sending out a primary electric signal by the digital optical fiber sensing amplifier (2) when the oil drops pass through; step 2, after the intermediate relay receives the electric signal from the digital optical fiber sensing amplifier (2), the normally open contact KA of the intermediate relay is reset after the action within the duration time of the electric signal; step 3, receiving an action signal of a normally open contact KA of the intermediate relay through a computer, and counting once by a counter in the computer after receiving the action signal every time; If the reset signal is received within the preset reset time and the computer judges that the actual detection time does not reach the preset detection time, the step 1 is returned, if the reset signal of the normally open contact KA of the intermediate relay is not received by the computer after the preset reset time is reached, the internal leakage of the electromagnetic valve is judged to be in line, the electromagnetic valve is unqualified, and the step 5 is executed; If the computer judges that the actual detection time reaches the preset detection time, executing the step 4, wherein the preset detection time is the sum of the solenoid valve power-on time M and the solenoid valve power-off time N, M is more than or equal to 2min, N is more than or equal to 2min, Step 4, judging whether the actual count times of the counter in the preset detection time reach the preset count times or not through a computer, if the actual count times do not reach the preset count times, detecting the electromagnetic valve to be qualified, and if the actual count times reach the preset count times, failing to be qualified; and 5, displaying the detection result of the electromagnetic valve by a computer, and finishing the detection of the oil drop internal leakage of the electromagnetic valve.
  6. 6. The electromagnetic valve internal leakage detection method based on the digital optical fiber sensing amplifier according to claim 5, wherein the electromagnetic valve internal leakage detection method is characterized by comprising the following steps of: in step 3, the preset reset time is 10s.
  7. 7. The electromagnetic valve internal leakage detection method based on the digital optical fiber sensing amplifier according to claim 6, wherein the electromagnetic valve internal leakage detection method is characterized by comprising the following steps: in step 3, m=n=2 min.

Description

Electromagnetic valve internal leakage detection device and method based on digital optical fiber sensing amplifier Technical Field The invention relates to an electromagnetic valve internal leakage detection device and method, in particular to an electromagnetic valve internal leakage detection device based on a digital optical fiber sensing amplifier and a detection method adopting the detection device. Background Hydraulic solenoid valves are automated basic components for electromagnetically controlling fluids, often used in industrial control systems to regulate the direction, flow, velocity, or other parameters of the fluid. The existing hydraulic electromagnetic valve consists of an electromagnetic coil, an electromagnetic driving piece and a valve body comprising a plurality of valves, wherein a cavity is formed in the valve body, and a sealing ring capable of sealing the cavity is arranged between the electromagnetic driving piece and the cavity. The working principle of the electromagnetic valve is that the electromagnetic coil drives the electromagnetic driving piece to operate so as to realize the communication between the chamber and the valve, and when the electromagnetic coil is powered off, the electromagnetic driving piece stops operating, and at the moment, the sealing ring separates the chamber from the valve so as to block the communication between the valve and the chamber. However, the conventional hydraulic solenoid valve leaks a small amount of oil, and the leaked oil forms crystals on the inner wall of the chamber, so that the performance of the hydraulic solenoid valve is reduced, and therefore, the hydraulic solenoid valve needs to be periodically subjected to oil drop internal leakage detection so as to ensure the performance of the hydraulic solenoid valve. In the prior art, the detection of the oil drop inner leakage of the electromagnetic valve is usually carried out manually, and the oil volume in the measuring cup is read to determine whether the inner leakage of the electromagnetic valve is qualified or not. Disclosure of Invention The invention aims to solve the technical problems that the existing method for detecting the oil drop internal leakage of a hydraulic electromagnetic valve by manpower is complex in steps and long in time consumption, and the accuracy of a detection result is poor due to the influence of human factors, and provides an electromagnetic valve internal leakage detection device and method based on a digital optical fiber sensor amplifier. In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: The electromagnetic valve internal leakage detection device based on the digital optical fiber sensing amplifier is characterized by comprising a measuring medium drip nozzle, the digital optical fiber sensing amplifier, an intermediate relay, a container and a computer; The input end of the measuring medium drip nozzle is connected with an oil return port of the electromagnetic valve to be detected, the digital optical fiber sensing amplifier is arranged below the output end of the measuring medium drip nozzle and is used for sending out signals when oil drops pass through, and the measuring medium drip nozzle and the digital optical fiber sensing amplifier are both arranged on an external panel; The container is placed below the digital optical fiber sensing amplifier; The terminal of the digital optical fiber sensing amplifier is used for being connected with an external control power supply, the signal output end of the digital optical fiber sensing amplifier is connected with the positive electrode of a coil KAQ of the intermediate relay and used for enabling a normally open contact KA of the intermediate relay to act within the duration of signal sending of the digital optical fiber amplifier, the negative electrode of the coil KAQ of the intermediate relay is connected with the negative electrode of the terminal of the digital optical fiber sensing amplifier, one end of the normally open contact KA of the intermediate relay is used for being connected with the external signal power supply, and the other end of the normally open contact KA is connected with a computer and used for recording and displaying the times of the actions of the normally open contact KA of the intermediate relay. Further, the action time of the intermediate relay is less than 10ms, and the reset time is less than 5ms. Further, the digital optical fiber sensing amplifier is a PNP type multipoint photoelectric switch. Further, the container is a measuring cup. The invention also provides an electromagnetic valve internal leakage detection method based on the digital optical fiber sensing amplifier, which adopts the electromagnetic valve internal leakage detection device based on the digital optical fiber sensing amplifier, and is characterized by comprising the following steps: Step 1, sensing oil drops through a digital optical fiber sens