A servo valve detection system

Abstract

This utility model relates to the field of fluid technology and discloses a servo valve testing system, including an inlet connector for connecting to the external control circuit of the servo valve; an outlet connector for connecting to the internal control interface of the servo valve; and a measuring unit integrated between the inlet and outlet connectors for testing the servo valve. The measuring unit includes a measuring component, a control component, and an offline feedback current analog potentiometer, which are connected to the inlet and outlet connectors. The advantages of this utility model are: the inlet and outlet connectors allow for connection to the servo valve, and the measuring unit enables the detection of faults in both the external wiring and the valve body, providing a comprehensive and convenient fault detection system, thus improving inspection efficiency.

Description

Technical Field

[0001] This utility model relates to the field of fluid technology, and in particular to a servo valve detection system. Background Technology

[0002] Hydraulic systems are widely used in various fields due to their wide adaptability to different processes, excellent control performance, and relatively low cost. Electro-hydraulic servo valves / proportional valves, as precision control components in hydraulic systems, offer high adjustment accuracy and rapid response. However, they also have drawbacks such as high precision requirements for components, complex control circuits, and difficulties in troubleshooting system faults. Determining whether the fault lies in the mechanical or electrical control components of the equipment is fundamental to troubleshooting electro-hydraulic servo valves / proportional valves.

[0003] In the existing technology, when checking multiple parameters of the control circuit of electro-hydraulic servo valve / proportional valve, different equipment is required, and different values ​​need to be checked at different interfaces during the inspection, which is relatively complicated and has low inspection efficiency. Utility Model Content

[0004] Therefore, the technical problem to be solved by this utility model is that when checking multiple parameters of the electro-hydraulic servo valve / proportional valve control circuit, different equipment is required, and different values ​​need to be checked at different interfaces during the check, which is complicated to operate and has low inspection efficiency.

[0005] The above-mentioned technical problems are solved by the following technical solution: This utility model proposes a servo valve detection system, which includes an inlet connector; an outlet connector; and a measuring unit integrated between the inlet connector and the outlet connector for detecting the servo valve; wherein, the measuring unit includes a housing and a measuring component, a control component, and an offline feedback current analog potentiometer disposed in the housing, and the measuring component, the control component, and the offline feedback current analog potentiometer are connected to the inlet connector and the outlet connector.

[0006] In a preferred embodiment of the servo valve detection system of this utility model: the measuring components include a first voltmeter, a power supply ammeter, a feedback current signal ammeter, a voltage setting signal voltmeter, and a current setting signal ammeter, which are disposed within a housing; the control components include a first switch, a second switch, and a third switch, which are disposed within the housing. The first switch is used to switch between online and offline modes, the second switch is used to switch the measuring component of the first voltmeter, and the third switch is used to switch the measurement of the voltage setting signal voltmeter and the current setting signal ammeter.

[0007] In a preferred embodiment of the servo valve detection system of this utility model: the first voltmeter, the power supply ammeter, the feedback current signal ammeter, the voltage setting signal voltmeter, and the current setting signal ammeter are respectively adapted and connected to the first switch, the second switch, and the third switch.

[0008] In a preferred embodiment of the servo valve detection system of this utility model: the measuring unit is provided with seven wires for connecting the measuring components, and the seven wires are respectively the first wire, the second wire, the third wire, the fourth wire, the fifth wire, the sixth wire, and the seventh wire, and the two ends of the seven wires are respectively adapted to connect to the inlet connector and the outlet connector.

[0009] In a preferred embodiment of the servo valve detection system of this utility model: the power ammeter is connected in series with the first wire and is used to measure the power supply current.

[0010] In a preferred embodiment of the servo valve detection system of this utility model: one end of the first voltmeter is connected to the second line, and the other end of the first voltmeter can be selectively connected to the first line or the third line through a second switching switch.

[0011] In a preferred embodiment of the servo valve detection system of this utility model: the feedback current signal ammeter is connected in series on the seventh line and is used to measure and check the valve core feedback current of the servo valve.

[0012] In a preferred embodiment of the servo valve detection system of this utility model: one end of the voltage setting signal voltmeter is connected to the sixth wire, and the other end of the voltage setting signal voltmeter is connected to the fifth wire.

[0013] In a preferred embodiment of the servo valve detection system of this utility model: one end of the current setting signal ammeter can be connected to the fifth or sixth line through a first switching switch, and the fifth line can be connected to one end of the first switching switch or the voltage setting signal voltmeter through a third switching switch.

[0014] In a preferred embodiment of the servo valve detection system of this utility model: one end of the offline feedback current analog given potentiometer is connected to the seventh line, and the other end of the offline feedback current analog given potentiometer can be connected to the first line through the first switching switch.

[0015] The beneficial effects of this utility model are as follows: the inlet and outlet connectors enable connection to the servo valve, and the measuring unit enables the detection of faults in the external wiring and valve body of the servo valve, providing a comprehensive inspection, facilitating fault detection, and improving inspection efficiency. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings of the embodiments of this utility model will be briefly described below. Obviously, the drawings described below only relate to some embodiments of this utility model and are not intended to limit the scope of this utility model. Wherein:

[0017] Figure 1 A schematic diagram of the servo valve detection system is shown.

[0018] Figure 2 The schematic diagram of the detection wiring of the servo valve detection system is shown.

[0019] Figure 3 The detection circuit diagram of the measurement unit is shown;

[0020] Figure 4 A pin parameter table for a servo valve is shown. Detailed Implementation

[0021] To enable those skilled in the art to better understand this utility model, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0022] The terminology used in this invention refers to those general terms currently widely used in the art in consideration of the functionality of this invention; however, these terms may vary according to the intent, precedent, or new technology of those skilled in the art. Furthermore, specific terms may be chosen by the applicant, and in such cases, their detailed meanings will be described in the detailed description of this invention. Therefore, the terminology used in this specification should not be construed as simple names, but rather based on the meaning of the terms and the overall description of this invention.

[0023] Example 1

[0024] Reference Figures 1-3 This is the first embodiment of the present invention. This embodiment provides a servo valve detection system, which includes an inlet connector 1; an outlet connector 3; and a measuring unit 2 integrated between the inlet connector 1 and the outlet connector 3 for detecting servo valves.

[0025] Inlet connector 1 is used to connect to the external control circuit of the servo valve, and outlet connector 3 is used to connect to the internal control interface of the servo valve. Measurement unit 2 is connected to inlet connector 1 and outlet connector 3 for testing the servo valve or proportional valve. Through inlet connector 1 and outlet connector 3, measurement unit 2 can be connected to the external wiring or valve body of the servo valve, which facilitates troubleshooting of different parts, makes it easier to quickly identify the fault location, and improves the efficiency of maintenance and inspection.

[0026] The measuring unit 2 includes a housing and a measuring component 21, a control component 22, and an offline feedback current analog potentiometer 23 disposed in the housing. The measuring component 21, the control component 22, the offline feedback current analog potentiometer 23 are connected to the inlet connector 1 and the outlet connector 3.

[0027] By setting the measurement component 21, multiple parameters of the servo valve's external wiring and valve body can be detected. It can quickly identify faults in the external circuit or valve body at different locations, making it easier for staff to perform maintenance. The control component 22 can change the parameters measured by the measurement component 21 to ensure the accuracy of the detection of the external circuit or valve body.

[0028] The offline feedback current simulation potentiometer 23 is used to simulate the feedback current of a servo valve or proportional valve in offline mode.

[0029] When using this device for testing, the detection is comprehensive: it can directly measure the power supply voltage, enable voltage, power supply current, feedback current signal, voltage / current setpoint signal, and offline analog current feedback signal of servo valves or proportional valves; it has strong versatility: the power supply voltage is below 30V; it can measure the working status of servo valves / proportional valves with control signals of 0-5V, 0-10V, 0-15V, ±5V, ±10V, ±15V, 0-10mA, 0-20mA, 4-20mA, ±5mA, ±10mA, and ±20mA.

[0030] Example 2

[0031] Reference Figures 1-2 This is the second embodiment of the present invention, which differs from the first embodiment in that it further includes a measurement component 21 comprising a first voltmeter 211, a power supply ammeter 212, a feedback current signal ammeter 213, a voltage setting signal voltmeter 214, and a current setting signal ammeter 215, all of which are disposed within a housing. The control component 22 includes a first switching switch 221, a second switching switch 222, and a third switching switch 223, all disposed within the housing. The first switching switch 221 is used to switch between online and offline modes, the second switching switch 222 is used to switch the measurement component of the first voltmeter 211, and the third switching switch 223 is used to switch the measurement of the voltage setting signal voltmeter 214 and the current setting signal ammeter 215.

[0032] Furthermore, the first voltmeter 211, the power supply ammeter 212, the feedback current signal ammeter 213, the voltage setting signal voltmeter 214, and the current setting signal ammeter 215 are respectively adapted and connected to the first switch 221, the second switch 222, and the third switch 223.

[0033] The first voltmeter 211 is used to detect and measure the power supply voltage of the servo valve or proportional valve. The measurement range is 0-30V. This measurement function is switched by the second switch 222. It can measure the power supply voltage or the enable voltage. Since the commonly used power supply voltage and enable voltage are 24V, the first voltmeter 211 can be used to measure whether the actual power supply voltage supplied is within the normal operating power supply voltage range of the servo valve or proportional valve.

[0034] The power ammeter 212 is used to detect and measure the operating power supply current of a servo valve or proportional valve, and to check whether the power supply of the servo valve or proportional valve is normal.

[0035] The feedback current signal ammeter 213 is used to measure and check the valve core feedback current of the servo valve or proportional valve to determine whether the servo valve or proportional valve is working properly.

[0036] The voltage setpoint signal voltmeter 214 is used to measure the voltage setpoint signal of a voltage-controlled servo valve or proportional valve, and to check whether the control signal of the servo valve or proportional valve is normal by measuring and comparing.

[0037] The current setpoint signal ammeter 215 is used to measure the current setpoint signal of a current-controlled servo valve or proportional valve, and to check whether the control signal of the servo valve or proportional valve is normal by measuring and comparing.

[0038] The first switching switch 221 can control the working state of the measuring unit 2, making it in online mode or offline mode. The second switching switch 222 is used to switch the first voltmeter 211 to measure the power supply voltage or enable voltage measurement, while the third switching switch 223 is used to switch the measurement of the voltage given signal voltmeter 214 or the current given signal ammeter 215.

[0039] Example 3

[0040] Reference Figures 3-4 This is the third embodiment of the present invention. Based on the previous two embodiments, this embodiment further includes a measuring unit 2 with seven wires for connecting to the measuring components. The seven wires are designated as wire A (first wire), wire B (second wire), wire C (third wire), wire D (fourth wire), wire E (fth wire), wire F (sixth wire), and wire G (seventh wire). The two ends of each of these seven wires are respectively adapted and connected to the inlet connector 1 and the outlet connector 3. Figure 4 The parameters shown correspond to, for example Figure 4Pin A and the first wire A are both for power supply, and so on.

[0041] These seven wires are connected to the seven pins on the inlet connector 1 and the outlet connector 3 respectively, ensuring that each connector corresponds to the other, thereby ensuring the detection of external circuits and valve body. Here, the servo valve has seven wires corresponding to the inlet connector 1 and the outlet connector 3. The measuring unit 2 can also be set to four or twelve wires, corresponding to the four-pin connector and the twelve-pin connector respectively. The specific setting can be determined according to the actual servo valve or proportional valve model. There is no specific limitation here. The connection of the internal electrical components can refer to this method.

[0042] Furthermore, the power ammeter 212 is connected in series with the first wire A to measure the power supply current.

[0043] Furthermore, one end of the first voltmeter 211 is connected to the second line B, and the other end of the first voltmeter 211 can be selectively connected to the first line A or the third line C via the second switching switch 222.

[0044] Furthermore, the feedback current signal ammeter 213 is connected in series on the seventh line G to measure and check the valve core feedback current of the servo valve.

[0045] Furthermore, one end of the voltage setting signal voltmeter 214 is connected to the sixth line F, and the other end of the voltage setting signal voltmeter 214 is connected to the fifth line E.

[0046] Furthermore, one end of the current setting signal ammeter 215 can be connected to the fifth line E or the sixth line F through the first switching switch 221, and the fifth line E can be connected to one end of the first switching switch 221 or the voltage setting signal voltmeter 214 through the third switching switch 223.

[0047] Furthermore, one end of the offline feedback current simulation given potentiometer 23 is connected to the seventh line G, and the other end of the offline feedback current simulation given potentiometer 23 can be connected to the first line A through the first switching switch 221.

[0048] When using servo valves or proportional valves for testing, the attached... Figure 4 The servo valve being demonstrated uses this device for troubleshooting as an example:

[0049] Offline detection process:

[0050] The first switch 221 in the device is switched to offline mode, the second switch 222 is switched to power measurement, and the third switch 223 is switched to current command signal measurement.

[0051] Unplug the seven-pin connector from the external wiring to the servo valve and connect the seven-pin connector to the inlet connector 1 of the device.

[0052] Check the reading of the first voltmeter 211 to check if the 24V power supply is present and normal. If it is abnormal, it can be determined that the power supply voltage is faulty and the power supply circuit can be checked.

[0053] Switch the second switch 222 to the enable voltage position, check the measurement value of the first voltmeter 211, and check whether the enable control signal 24V voltage is present and normal. If there is no voltage, it can be determined that the enable signal is faulty or the enable signal line is faulty.

[0054] By checking the measured value of the current setpoint signal ammeter 215 and comparing it with the current control signal measured by the current setpoint signal ammeter 215, control signal problems can be quickly identified.

[0055] Check the measured reading of the feedback current signal ammeter 213, adjust the offline feedback current analog setpoint potentiometer 23, and compare the current feedback signal received by the control system with the measured value of the feedback current signal ammeter 213 to quickly troubleshoot feedback signal faults. If the feedback current signal ammeter 213 displays "0", it indicates that there is a fault in the feedback signal line.

[0056] If all measurement signals are normal in offline mode, it can be preliminarily determined that the fault is in the servo valve / proportional valve body. Subsequently, online testing can be performed to measure whether the valve body is faulty.

[0057] Online detection process:

[0058] Based on offline testing, the outlet connector 3 of the device is connected to the interface of the servo valve to form a passage with the servo valve. Then, the first switch 221 is switched to online mode and the second switch 222 is switched to the power supply voltage level.

[0059] Check the reading of the first voltmeter 211 to see if the 24V power supply is present and normal. If, after plugging in the power supply, the voltage measured by the first voltmeter 211 drops significantly compared to the voltage measured in offline mode, exceeds the rated voltage range, or becomes "0", and if the current measured by the power ammeter 212 is large, exceeding the maximum 300mA current, then it can be determined that there is a short circuit fault in the power supply of the servo valve body. If the voltage measured by the first voltmeter 211 is normal, but the current measured by the power ammeter 212 is "0", then there is an open circuit fault in the power supply circuit inside the servo valve.

[0060] Switch the second switch 222 to the enable voltage position and check whether the enable control signal 24V voltage is present and normal. If the enable voltage measured by the second switch 222 drops significantly compared to the enable voltage measured in the offline state, or if the second switch 222 fails to measure the enable voltage, it can be determined that it is a servo valve enable open circuit fault signal.

[0061] Check the measured value of the current setpoint signal ammeter 215 and compare the 4-20mA control signal given by the servo valve control system with the current control signal measured by the current setpoint signal ammeter 215. If the currents are consistent, it is normal. If there is no current or the currents are inconsistent, it is a fault in the internal control signal of the servo valve.

[0062] Check the reading of the feedback current signal ammeter 213 and compare it with the value given by the control signal. If the feedback current signal ammeter 213 shows a feedback current signal of "0", it indicates that there is a fault in the feedback signal circuit inside the servo valve. If they are inconsistent, it may be that there is a fault in the feedback current inside the servo valve or that the servo valve is not supplied with hydraulic oil.

[0063] By using the two detection methods described above and comparing various parameters, the specific location of the fault can be accurately determined, greatly improving detection efficiency and reducing the workload of staff.

[0064] Finally, it should be noted that the methods and devices described in detail above are merely embodiments, and those skilled in the art can modify these embodiments in different ways as long as they do not depart from the scope of this utility model.

Claims

1. A servo valve detection system, characterized in that: include, Imported connector (1); Outlet connector (3); The measuring unit (2) is integrated between the inlet connector (1) and the outlet connector (3) and is used to detect the servo valve; The measuring unit (2) includes a housing and a measuring component (21), a control component (22), and an offline feedback current analog given potentiometer (23) disposed in the housing. The measuring component (21), the control component (22), and the offline feedback current analog given potentiometer (23) are connected to the inlet connector (1) and the outlet connector (3).

2. The servo valve detection system according to claim 1, characterized in that: The measuring component (21) includes a first voltmeter (211), a power supply ammeter (212), a feedback current signal ammeter (213), a voltage setting signal voltmeter (214), and a current setting signal ammeter (215), which are disposed inside the housing. The control component (22) includes a first switch (221), a second switch (222), and a third switch (223). The first switch (221), the second switch (222), and the third switch (223) are disposed in the housing. The first switch (221) is used to switch between online and offline modes. The second switch (222) is used to switch the measuring component of the first voltmeter (211). The third switch (223) is used to switch the measurement of the voltage setpoint signal voltmeter (214) and the current setpoint signal ammeter (215).

3. The servo valve detection system according to claim 2, characterized in that: The first voltmeter (211), the power supply ammeter (212), the feedback current signal ammeter (213), the voltage setting signal voltmeter (214), and the current setting signal ammeter (215) are respectively adapted and connected to the first switch (221), the second switch (222), and the third switch (223).

4. The servo valve detection system according to claim 2 or 3, characterized in that: The measuring unit (2) is provided with seven wires for connecting the measuring component (21). The seven wires are the first wire (A), the second wire (B), the third wire (C), the fourth wire (D), the fifth wire (E), the sixth wire (F), and the seventh wire (G). The two ends of the seven wires are respectively adapted to connect to the inlet connector (1) and the outlet connector (3).

5. The servo valve detection system according to claim 4, characterized in that: The power ammeter (212) is connected in series with the first wire (A) and is used to measure the power supply current.

6. The servo valve detection system according to claim 5, characterized in that: One end of the first voltmeter (211) is connected to the second line (B), and the other end of the first voltmeter (211) can be selectively connected to the first line (A) or the third line (C) via the second switching switch (222).

7. The servo valve detection system according to claim 6, characterized in that: The feedback current signal ammeter (213) is connected in series on the seventh line (G) and is used to measure and check the valve core feedback current of the servo valve.

8. The servo valve detection system according to claim 7, characterized in that: One end of the voltage setting signal voltmeter (214) is connected to the sixth line (F), and the other end of the voltage setting signal voltmeter (214) is connected to the fifth line (E).

9. The servo valve detection system according to claim 8, characterized in that: One end of the current setting signal ammeter (215) can be connected to the fifth line (E) or the sixth line (F) through the first switching switch (221), and the fifth line (E) can be connected to one end of the first switching switch (221) or the voltage setting signal voltmeter (214) through the third switching switch (223).

10. The servo valve detection system according to claim 9, characterized in that: One end of the offline feedback current analog given potentiometer (23) is connected to the seventh line (G), and the other end of the offline feedback current analog given potentiometer (23) can be connected to the first line (A) through the first switching switch (221).

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