KR200218390Y1 - Interlock Timer Diagnosis Device - Google Patents

Abstract

The present invention relates to an interlock timer diagnostic apparatus, and more particularly, to an interlock timer diagnostic apparatus for detecting and displaying a contact state and a contact state holding time according to an operation of an interlock timer.

By detecting and displaying the timer contact state and the contact state holding time according to the operation of the interlock timer by the interlock timer diagnosis apparatus of the present invention, it is possible to easily diagnose whether the interlock timer is normally operated, and in analog and computer systems It is necessary to use a large amount of measuring equipment, manual repetition, and excessive maintenance time for each test task of timers used to protect the equipment from alarms and to prevent the spread of heavy equipment when various types of processor values are out of limits. The time required can be greatly shortened, and even in case of a momentary malfunction, it can be reasonably checked.

Description

Interlock Timer Diagnosis Device

The present invention relates to an interlock timer that shuts down the equipment when various control systems and devices in the process equipment deviate from the normal operation limit. The present invention relates to an interlock timer diagnostic device that can display and significantly reduce test time and maintenance time.

In general, the interlock timer (interlock timer) is to stop the operation of the facility in the event of an abnormality, such as when the processor or device operated by various analog systems and digital control systems deviate from the limit during normal operation, so that the operator can respond quickly It is a device to prevent related equipment or devices from being damaged due to the expansion of the heavy equipment situation and the failure of the product.

In the analog and digital control systems, a large number of interlock timers used to perform the pivotal role may be malfunctioned due to the increase in the resistance of the contact part due to the mixing of ambient dust by long-term use and the accumulation of arc phenomenon by frequent operation. Since there is no device that can easily diagnose the operation function of the interlock timer, the malfunction of the production line occurs when the timer malfunctions, and the maintenance time is long because there is no equipment that can test the performance of the interlock timer. There was a problem that causes a decrease in productivity and a decrease in productivity of the facility.

The present invention has been made in order to solve the above problems and to achieve an improvement point, and its purpose is to detect and display a timer contact state and a contact state holding time according to the operation of the interlock timer. The present invention provides an interlock timer diagnostic apparatus that can easily check the diagnostic result.

1 is an overall configuration diagram of an interlock timer diagnostic apparatus according to the present invention,

FIG. 2 is a detailed circuit diagram of the contact operation time display unit 80 shown in FIG.

FIG. 3 is a detailed circuit diagram of the contact state display unit 70 shown in FIG.

* Explanation of symbols for main parts of the drawings

10: power supply 20: AC timer socket

30: DC timer socket 40: Male connector

50: female connector 60: contact selector switch

70: contact status display section 72: connection connector

74: LED 80: contact operation time display

82: oscillation unit 84: power supply unit

86: counter portion 88: segment display portion

As a technical means for achieving the above object of the present invention, the interlock timer diagnostic apparatus of the present invention includes a power supply unit for supplying AC power and DC power to each of the AC timer and DC timer; An AC timer socket for inserting an AC timer to be tested among interlock timers; A DC timer socket for inserting a DC timer to be tested among interlock timers; A male / female connector for interconnecting each of the a, b, and common contacts of each timer withdrawn from the AC timer socket and the DC timer socket; A contact select switch capable of switching each of the lines connected to the display unit from the male / female connector; A contact state display unit which displays the state of the contact selected by the contact selection switch according to the potential level between the common contact line and each of the a contact line or the b contact line; And a contact operation time display unit for displaying a contact state holding time by counting time pulses by a predetermined oscillation operation according to signal levels on the contact point a and line b through the contact selection switch.

Hereinafter, with reference to the accompanying drawings a preferred embodiment of the interlock timer diagnostic apparatus according to the present invention.

1 is an overall circuit configuration diagram of an interlock timer diagnostic apparatus according to the present invention. Referring to FIG. 1, the interlock timer diagnostic apparatus of the present invention is a power supply unit supplying an AC power source and a DC power source to an AC timer and a DC timer, respectively. 10, an AC timer socket 20 in which an AC timer to be tested is installed, a DC timer socket 30 in which a DC timer to be tested is installed, and an AC timer socket 20 and a DC timer socket 30. A male / female connector (40,50) for interconnecting a line connected to each of the a, b, and common contacts of each of the installed AC and DC timers with a line of another device; and the female / male connector (40; 50). A contact select switch 60 for selecting a contact of the AC timer or a DC timer connected to the test phase, and a common contact line connected through the contact select switch 60 and the selected a contact or b contact of each timer. A time pulse according to a predetermined oscillation operation is counted according to a signal level between a contact point a and b contact of the timer selected by the contact selection switch 60 and a contact state display unit 70 for displaying a contact state according to the potential level. A contact operation time display portion 80 for displaying the contact state holding time is provided.

The power supply unit 10 is configured to apply AC power input to the coil TM1 of the timer provided in the AC timer socket 20 and further, bridge the AC power via the voltage drop T1. And rectified and smoothed through the diode BD1 and the smoothing capacitor C1, and then provided to the coil TM2 of the DC timer installed in the DC timer socket 30. Configure variable resistors VR1 and VR2 for AC and DC power level adjustment on the line, respectively.

FIG. 2 is a detailed circuit diagram of the contact operation time display unit 80 shown in FIG. 1. Referring to FIG. 2, the contact operation time display unit 80 is connected to the selected contact a through the contact selection switch 60. The oscillation unit 82 outputs a time pulse by oscillating by the signal level on the contact point, an electrolytic capacitor C2 connected to the common contact via the contact selection switch 60, and a power supply B + connected in parallel thereto. A power supply unit 84 for supplying power to the counter circuit unit 86, a counter unit 86 for decimally counting pulses from the oscillation unit 82, and a value counted by the counter unit 86. Is composed of a segment display unit 88 which displays.

The contact operation time display portion 80 further comprises a reset switch SW2 for resetting the counter portion 86, and the oscillation portion 82 constitutes an inverter with NAND gates NAND1 and NAND2. An oscillation circuit, wherein the power supply unit 84 includes a power switch SW1.

FIG. 3 is a specific circuit diagram of the contact state display unit 70 shown in FIG.

Here, R1 to R12, which are not described in the drawing, are current limiting resistors, and LED1 to LED12 are light emitting diodes which display the contact state of the interlock timer.

Operation according to the device of the present invention configured as described above will be described in detail below based on the accompanying drawings.

Referring to FIG. 1, FIG. 2 and FIG. 3, the present invention will be described. First, the diagnosis target timer is installed in the AC timer socket 20 or the DC timer socket 30. FIG. After visually confirming the timer voltage to be diagnosed, the supply voltage is adjusted by adjusting the variable resistor VR1 of the power supply unit 10. Then, a predetermined alternating current (AC) voltage is applied from the power supply unit 10 to the coil TM1 of the timer provided in the AC timer socket 20. At this time, when the coil TM1 of the timer in the AC timer socket 20 is energized, the connection of the timer is switched from the b contact to the a contact by the energization of the coil TM1. The a contact point and the b contact point of each of the AC timers operating in this way are selected through the male / male collectors 40 and 50 and the contact selector switch 60, and the selected contact point is connected to the connection connector of the contact state display unit 70. 72) Since it is connected to the input terminals S1 to S6, COM, the light emitting diodes LED1 to LED6 of the LED unit 74 operate according to the operation of the corresponding contact to check whether there is an operation, and to determine the faulty contact of the timer to be measured. It becomes easily identifiable. In the example shown in FIG. 1, the contact a of the timer 20 is turned off and the contact b is lit.

The contact state identification of the timer according to whether the light emitting diodes LED1 to LED6 of the LED unit 74 in the contact state display unit 70 is turned on is performed for the contact a and b by the operation of the DC timer 30. In the presence or absence diagnosis, the same operation as described above with respect to the AC timer 20 is performed.

On the other hand, at the time of diagnosing the operation state of the AC timer 20 or the DC timer 30, in the case of the AC timer 20, the time for the time limit operation and the instantaneous operation should be checked, which is the value of the contact state display unit 70. Connected to the connection connector 72 input terminals S1 to S6 of the contact status display unit 70, withdrawn from the output line of the contact selection switch 60 connected to the connection connectors 72 input terminals COM, S1 to S6. A line is input to one input terminal of the negative logic NAND1 of the oscillator 82 shown in FIG. 2, and the output counter signal passing through the oscillator 82 constituted by an oscillation frequency driving circuit of approximately 10 Hz is a C-MOS IC circuit. The input signal is inputted to the counter 86, and the timer signal is outputted. The time is passed through the resistors R32 to R53 for maintaining a constant current flowing through the segment display unit 88 and reducing power consumption. Appears on the display unit 80, so it is easy and accurate to confirm. It becomes possible to print.

In addition, the line connected to the input terminal COM of the connection connector 72 of the contact state display unit 70 is connected to the capacitor C2 of the power supply unit 84, and the capacitor is the counter number when switching the power switch SW1. Hold for several seconds. When the diagnosis is completed as described above, the reset switch SW2 is turned on to be input to the type power stage of the negative logic product NAND1 of the oscillation unit 82 to reset the contact operation time of the diagnosis target timer to perform a diagnosis time test. You can restart it.

Next, a check process of the malfunction of the measurement target timer will be described with reference to FIG. 3. When any one of the input terminals S1 to S12 of the connection connector 72 of the contact state display unit 70 shown in FIG. 3 is operated, the first relay A is operated, and at this time, the second relay B Is turned on by the contacts A2 and C1 and the alarm button contact 94 to be self-maintained as its contact B2, so that the first relay A is self-maintained by the contacts A1 and B1. Accordingly, the third relay C is also turned on by the contact A4 and the reset button contact 95 and is maintained as the contact C2 of the magnetic relay. Therefore, since the fourth relay D and the buzzer 93 are driven by the contacts A3 and B3 and the alarm button contact 94, the fourth relay D and the buzzer 93 are driven by the contacts D1 and B4 and A6 which are turned on for a predetermined time. The diodes LED1 to LED12 are turned on. When the alarm button is pressed in this state, the fourth relay B and the buzzer 93 are turned off, and the first to third relays A, B, and C are turned off to turn off the light emitting diode LED1. If you release, you can return to the previous state and check the buzzer operation at this time. The test button 92 may check whether the relay malfunction check circuit operates normally. The off of the test button 92 turns off the light emitting diodes LED1 to LED12.

According to the present invention as described above, by detecting and displaying the timer contact state and the contact state holding time according to the operation of the interlock timer, the special effect to easily check the diagnostic results for normal operation of the interlock timer There is.

In addition, another effect of the present invention is that a large amount of measuring equipment is used in each test operation of a timer used to protect the equipment from alarming and spreading to the high and high fields when various types of processor values fall out of limits in analog and computer systems. Maintenance time, such as time required, manual repetition, and excessive time required for maintenance, can be greatly reduced, and even in case of a momentary malfunction, it can be reasonably checked.

The above description is only a description of one embodiment of the present invention, the present invention is capable of various changes and modifications within the scope of the configuration. In addition, those skilled in the art will readily appreciate that the interlock timer diagnostic apparatus is not limited to the above-described embodiment.

Claims (1)

A power supply unit 10 for supplying an AC power source and a DC power source to each of the AC timer and the DC timer; An AC timer socket 20 for inserting an AC timer to be tested among interlock timers; A DC timer socket 30 for inserting a DC timer to be tested among interlock timers; A male / female connector (40, 50) for interconnecting each of the a, b, and common contacts of each timer withdrawn from the AC timer socket (20) and the DC timer socket (30) with a line of another device; A contact selection switch 60 capable of switching each of the lines connected to the display unit from the male and female connectors 40 and 50; A contact state display unit (70) for displaying the state of the contact selected by the contact selection switch (60) according to the potential level between the common contact line and each of the a contact line or the b contact line; And a contact operation time display unit 80 for displaying the contact state holding time by counting time pulses by a predetermined oscillation operation according to signal levels on the contact point a and line b through the contact selection switch 60. Interlock timer diagnostic device characterized in that.