Portable marine direct-current electromagnetic valve coil polarity judgment device

Abstract

The utility model provides a portable polarity judgment device for a marine direct-current electromagnetic valve coil. A power-on button, a probe connecting plug and a charging port are arranged on the front side face of the device shell, a data display screen is arranged on the front face of the device shell, and a forward test button, a reverse test button and a current self-checking button are sequentially arranged on the lower portion of the data display screen and jointly complete polarity judgment of a direct-current electromagnetic valve coil; an internal circuit is arranged in the device shell and comprises a signal input and processing circuit, a data display circuit, an automatic shutdown circuit, a battery charging and power supply circuit, a high-performance battery circuit and a precise milliampere current generation circuit which jointly complete the processing function of the internal circuit; wherein the precise milliampere current generating circuit emits high-precision and high-stability 10.00 mA direct current, a red and black meter pen probe inserted in the probe connecting plug is connected with a coil of the direct current electromagnetic valve, and the positive test button and the reverse test button are alternately superposed on the coil.

Description

Technical Field

[0001] This utility model relates to the coil polarity in the field of DC solenoid valves, and in particular to a portable marine DC solenoid valve coil polarity determination device. Background Technology

[0002] Marine DC solenoid valves are widely used in marine systems and are installed in large numbers. Because they need to work in high temperature and high pressure environments for a long time, their reliability requirements are extremely high. Before formal installation, they need to be tested on land to verify their electrical switching performance. A special solenoid valve debugging device is used for testing.

[0003] The marine DC solenoid valve currently used in the product adopts a 4-pin aviation plug wiring method. Under normal circumstances, pins 1 and 2 of the plug are the positive and negative terminals of the debugging power supply, pin 1 is the positive terminal of the power supply, pin 2 is the negative terminal of the power supply, and a protection freewheeling diode is connected in parallel. Pins 3 and 4 are the reed switches that provide feedback on the valve's internal switching status.

[0004] However, in the process of implementing the inventive technical solution in the embodiments of this application, the inventors of this application discovered that the above-mentioned technology has at least the following technical problems:

[0005] During coil power supply, reversing the polarity of pins 1 and 2 of the DC solenoid valve's power supply will cause the internal freewheeling diode to short-circuit, leading to internal circuit failure. This short circuit can also damage the dedicated solenoid valve debugging device. This situation has occurred multiple times during product debugging. Subsequent investigation revealed that the terminals on pins 1 and 2 of the valve manufacturer's output aviation connector were soldered backwards due to operator error. This situation not only causes the internal freewheeling diode to short-circuit, triggering the valve debugging device's output protection, and resulting in failed valve debugging tests, causing economic losses and impacting production schedules.

[0006] To solve this problem, a testing device is needed that can independently detect the polarity of the marine DC solenoid valve without supplying a DC power supply to the solenoid valve. Using this device, the polarity of all valves can be tested before the formal commissioning of the marine solenoid valve, thereby confirming whether the polarity of the marine solenoid valve is correct and avoiding subsequent accidents. Summary of the Invention

[0007] To address the shortcomings of existing technologies and the problem of detecting the polarity of marine DC solenoid valves when no power is supplied, this application provides a portable device for determining the polarity of marine DC solenoid valve coils. This device generates a high-precision, high-stability 10.00mA DC current through an internal precision milliampere current generator. This current is alternately superimposed on the coil of the DC solenoid valve under test. Furthermore, the device is battery-powered, suitable for various commissioning environments, reducing dependence on the commissioning site, and solving the technical problem of detecting the polarity of DC solenoid valves when no power is supplied.

[0008] The solution adopted by the embodiments of this application to solve the technical problem is:

[0009] A portable marine DC solenoid valve coil polarity determination device includes a housing. A power button, a probe connector, and a charging port are located on the front side of the housing. A data display screen is located on the front of the housing. Below the data display screen are arranged forward test buttons, reverse test buttons, and a current self-test button, which together determine the polarity of the DC solenoid valve coil, i.e., detect the presence of an internal freewheeling diode. An internal circuit is located inside the housing, including a signal input and processing circuit, a data display circuit, an automatic shutdown circuit, a battery charging and power supply circuit, and a high-voltage... The performance battery circuit and the precision milliamp current generating circuit work together to complete the processing functions of the internal circuit. The precision milliamp current generating circuit generates a high-precision, high-stability 10.00mA DC current. The red and black multimeter probes plugged into the probe connector are connected to the coil of the DC solenoid valve. The forward test button and the reverse test button are used to alternately superimpose the high-precision, high-stability 10.00mA DC current onto the coil of the DC solenoid valve. The current self-test button is used to perform a self-test on the high-precision, high-stability 10.00mA DC current before each test.

[0010] In order to further solve the technical problems to be solved by the embodiments of this application, in the internal circuit provided by the embodiments of this application, the signal input and processing circuit is responsible for receiving the input detection and processing functions of the four buttons on the device housing: the power button, the forward test button, the reverse test button, and the current self-test button. According to the corresponding input state, the internal relay is controlled to open the precision milliampere current generating circuit and the data display circuit to complete the function of measuring the resistance of the solenoid valve coil.

[0011] Furthermore, in the internal circuit, the battery charging power supply circuit supplies power to the battery and is responsible for powering all circuits and charging the high-performance battery circuit.

[0012] Furthermore, in the internal circuit, the automatic shutdown circuit is responsible for the automatic shutdown function when the device is idle, and the setting parameter is to automatically shut down after 0.5 hours of inactivity.

[0013] Positive effects: The technical solutions provided in the embodiments of this application have at least the following technical effects or advantages:

[0014] 1. Because the embodiments of this application employ a device with an internal circuit that generates a high-precision, high-stability 10.00mA DC current through a precision milliampere current generation circuit, and the red and black multimeter probes plugged into the probe connector are connected to the coil of the DC solenoid valve, the high-precision, high-stability 10.00mA DC current is alternately superimposed on the coil of the DC solenoid valve using forward and reverse test buttons. This allows for the measurement of a voltage value, which corresponds to the resistance of the solenoid valve coil. Based on this, the polarity of the connected solenoid valve coil can be determined, i.e., whether a freewheeling diode is connected in parallel to the solenoid valve coil. This effectively solves the technical problem of DC solenoid valve power supply polarity in the prior art, thereby achieving the technical effect of confirming whether the DC solenoid valve power supply polarity is correct and avoiding subsequent accidents.

[0015] 2. Because the embodiments of this application adopt the technical means of having a battery charging power supply circuit and a high-performance battery circuit to power the battery in the internal circuit of the device, the technical problem of the polarity of the DC solenoid valve power supply in the prior art is effectively solved, thereby achieving the technical effect of being applicable to various debugging sites and reducing dependence on the debugging site.

[0016] 3. Because the embodiments of this application adopt the technical means of having a current self-test button in the device, which is used to perform a self-test on the high-precision and high-stability 10.00mA DC current before each test, it effectively solves the technical problem of the polarity of the DC solenoid valve power supply in the prior art, and can ensure the accuracy of the high-precision and high-stability 10.00mA DC current, thereby achieving the technical effect of ensuring the accuracy of the test results.

[0017] It is suitable for use as a portable marine DC solenoid valve coil polarity determination device. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the external panel in this embodiment;

[0020] Figure 2 This is a block diagram illustrating the internal workings of this embodiment.

[0021] In the diagram, 1. Device housing, 2. Data display screen, 3. Power button, 4. Probe connector plug, 5. Charging port, 6. Forward test button, 7. Reverse test button, 8. Current self-test button, 11. Signal input and processing circuit, 12. Data display circuit, 13. Automatic power-off circuit, 14. Battery charging and power supply circuit, 15. High-performance battery circuit, 16. Precision milliampere current generation circuit. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0023] This application provides a portable marine DC solenoid valve coil polarity determination device, which solves the problem that existing marine DC solenoid valves cannot detect coil polarity when no power is supplied. By alternately applying high-precision constant current sources with opposite polarities to the coil and identifying whether there is a freewheeling diode inside, the polarity of the solenoid valve coil can be quickly determined.

[0024] As shown in the figure, a portable marine DC solenoid valve coil polarity determination device includes a housing 1. A power button 3, a probe connector 4, and a charging port 5 are located on the front side of the housing 1. A data display screen 2 is located on the front of the housing 1. Below the data display screen 2, a forward test button 6, a reverse test button 7, and a current self-test button 8 are arranged sequentially, collectively determining the polarity of the DC solenoid valve coil, i.e., detecting the presence or absence of a freewheeling diode. An internal circuit is located inside the housing 1, including a signal input and processing circuit 11, a data display circuit 12, an automatic shutdown circuit 13, a battery charging and power supply circuit 14, a high-performance battery circuit 15, and a precision milliampere current generating circuit 16, collectively performing the internal circuit's processing functions. The precision milliampere current generating circuit... The current generating circuit 16 outputs a high-precision, high-stability 10.00mA DC current. The red and black multimeter probes plugged into the probe connector 4 are connected to the coil of the DC solenoid valve. The forward test button 6 and the reverse test button 7 are used to alternately superimpose the high-precision, high-stability 10.00mA DC current onto the coil of the DC solenoid valve and measure the voltage value. This voltage value corresponds to the resistance of the solenoid valve coil, and the polarity of the connected solenoid valve coil is determined accordingly, i.e., whether a freewheeling diode is connected in parallel with the solenoid valve coil. The current self-test button 8 is used to perform a self-test on the high-precision, high-stability 10.00mA DC current before each test, thereby ensuring the accuracy of the high-precision, high-stability 10.00mA DC current and thus ensuring the accuracy of the test results.

[0025] Preferably, in the internal circuit, the signal input and processing circuit 11 is responsible for receiving the input detection and processing functions of the four buttons on the device housing 1: the power button 3, the forward test button 6, the reverse test button 7, and the current self-test button 8. According to the corresponding input state, it controls the internal relay to open the precision milliampere current generating circuit 16 and the data display circuit 12 to complete the function of measuring the resistance of the solenoid valve coil.

[0026] The battery charging power supply circuit 14 supplies power to the battery and is responsible for powering all circuits and charging the high-performance battery circuit 15.

[0027] The automatic shutdown circuit 13 is responsible for the automatic shutdown function when the device is idle. The setting parameter is that it will automatically shut down after 0.5 hours of inactivity.

[0028] The technical solutions described in the embodiments of this application have at least the following technical effects or advantages:

[0029] Because the device's internal circuitry has a precision milliampere current generating circuit 16 that generates a high-precision, high-stability 10.00mA DC current, and the red and black multimeter probes plugged into the probe connector 4 are connected to the coil of the DC solenoid valve, the high-precision, high-stability 10.00mA DC current can be alternately superimposed on the coil of the DC solenoid valve using the forward test button 6 and the reverse test button 7. This allows for the measurement of the voltage value, which corresponds to the resistance of the solenoid valve coil. This voltage value is used to determine the polarity of the connected solenoid valve coil, i.e., whether a freewheeling diode is connected in parallel with the solenoid valve coil. This confirms whether the power supply polarity of the DC solenoid valve is correct, preventing subsequent accidents.

[0030] Because the device has a battery charging power supply circuit 14 to power the battery, it is suitable for various debugging sites, reducing dependence on the debugging site.

[0031] Because the device is equipped with a current self-test button 8 to perform a self-test on the high-precision, high-stability 10.00mA DC current before each test, it can ensure the accuracy of the high-precision, high-stability 10.00mA DC current, thereby ensuring the accuracy of the test results.

[0032] The working process of this embodiment:

[0033] Powering on the device: Connect the aviation plug end of the probe measurement line to the probe connection plug 4 of the device according to the positioning bayonet, and then press the power button 3 on the front side of the device. The device will be powered on and the data display screen 2 will show 0.00, indicating that the device is powered on normally.

[0034] Device self-test: Before testing, use the current self-test button 8 to perform a self-test on the device. After pressing the current self-test button 8, the screen will display 10.00. Due to the influence of ambient temperature and device preheating, the displayed data may fluctuate by 1-2 characters, which is within the normal range and will not affect the measurement.

[0035] Solenoid valve coil polarity test: After properly connecting the probe's test leads to the DC solenoid valve coil under test, note the terminal numbers of the red and black probes connected to the coil. Then press the forward test button 6 on the front of the device housing 1. The data display screen 2 will show the data of the DC solenoid valve coil under test. Record the data after 1-2 seconds when the data stabilizes. Then press the reverse test button 7 on the front of the device housing 1 again. The data display screen 2 will show the data of the DC solenoid valve coil under test. Record the data after 1-2 seconds when the data stabilizes. If the two measurement data are equal or close, and the difference in the data display is less than 0.1, it indicates that there is no continuous current inside the marine DC solenoid valve coil. The diode and coil are not polarity-sensitive, and users do not need to record the coil terminal numbers. Connecting a DC 220V or DC 24V directly to the coil according to the solenoid valve's power supply specifications will not damage the solenoid valve. If two measurement data differ significantly, with one reading as 0.70 in both positive and negative tests, it indicates that the marine DC solenoid valve coil has an internal freewheeling diode. For measurements with the larger reading, the red probe of the probe should be connected to the positive terminal of the solenoid valve, and the black probe to the negative terminal. In this case, the external DC power supply must be connected according to the polarity of the coil as indicated by the measurement results; otherwise, the internal freewheeling diode or the external DC power supply may be damaged.

[0036] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A portable marine DC solenoid valve coil polarity determination device, characterized in that: The device includes a housing (1), on the front side of which are a power button (3), a probe connector (4), and a charging port (5). A data display screen (2) is located on the front of the housing (1). At the bottom of the data display screen (2) are arranged a forward test button (6), a reverse test button (7), and a current self-test button (8), which together determine the polarity of the DC solenoid valve coil, i.e., whether there is a freewheeling diode inside. An internal circuit is located inside the housing (1), which includes a signal input and processing circuit (11), a data display circuit (12), an automatic shutdown circuit (13), and a battery charging and power supply circuit (14). The high-performance battery circuit (15) and the precision milliampere current generating circuit (16) work together to complete the processing function of the internal circuit. The precision milliampere current generating circuit (16) generates a high-precision and high-stability 10.00mA DC current. The red and black probes plugged into the probe connector (4) are connected to the coil of the DC solenoid valve. The forward test button (6) and the reverse test button (7) are used to alternately superimpose the high-precision and high-stability 10.00mA DC current onto the coil of the DC solenoid valve. The current self-test button (8) is used to perform a self-test on the high-precision and high-stability 10.00mA DC current before each test.

2. The portable marine DC solenoid valve coil polarity determination device according to claim 1, characterized in that: In the internal circuit, the signal input and processing circuit (11) is responsible for receiving the input detection and processing functions of the four buttons on the housing (1) of the receiving device: the power button (3), the forward test button (6), the reverse test button (7), and the current self-test button (8). According to the corresponding input state, it controls the internal relay to open the precision milliampere current generating circuit (16) and the data display circuit (12) to complete the measurement function of the electromagnetic valve coil resistance.

3. The portable marine DC solenoid valve coil polarity determination device according to claim 1, characterized in that: In the internal circuit, the battery charging power supply circuit (14) supplies power to the battery and is responsible for powering all circuits and charging the high-performance battery circuit (15).

4. The portable marine DC solenoid valve coil polarity determination device according to claim 1, characterized in that: In the internal circuit, the automatic shutdown circuit (13) is responsible for the automatic shutdown function when the device is idle, and the parameter is set to automatically shut down after 0.5 hours of no operation.

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