Dummy load device for debugging and detecting main loop of magnetic particle flaw detector
By using a dummy load device in the main circuit of the magnetic particle flaw detector and utilizing the series and parallel structure of diodes and light bulbs to limit the current, the problem of equipment damage caused by high current during the maintenance and debugging of the magnetic particle flaw detector was solved, and rapid fault diagnosis and production continuity were achieved.
Patent Information
- Application Number
- CN202520297376.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-24
- Publication Date
- 2025-11-21
- Estimated Expiration
- 2035-02-24
AI Technical Summary
During the maintenance and commissioning of existing magnetic particle flaw detectors, high current faults can cause equipment damage or even wider power outages, affecting production.
A dummy load device is used, including a first diode, a second diode, a first bulb, and a second bulb, which are connected in series and parallel in the main circuit. Circuit faults are judged by the difference and sudden change in bulb brightness, and the current is limited to prevent the generation of large current.
This eliminates damage to equipment and facilities during maintenance and debugging, prevents the escalation of faults, allows for rapid identification of the fault range, and avoids production stoppages.
Smart Images
Figure CN223581982U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to magnetic particle flaw detector technology, concretely relates to a false load device of magnetic particle flaw detector main loop debugging detection. BACKGROUND
[0002] At present, in the manufacturing and overhauling process of railway freight (passenger) cars, to ensure product quality safety, various magnetic particle flaw detectors (silicon controlled rectifier circuit) are widely used in production as the key equipment for detecting the surface or near-surface crack defects of steel products, and when a large current fault occurs in the equipment, in the overhauling and debugging process, the light one is to frequently burn out the fusible link breaker protection, and the heavy one is to burn out the current loop components, or to cause a larger range of power failure caused by the upper breaker protection, which directly affects production. SUMMARY
[0003] The utility model provides a false load device of magnetic particle flaw detector main loop debugging detection in view of above -mentioned problem, carries out magnetic particle flaw detector current fault maintenance debugging, can prevent the phenomenon that the equipment facility is damaged by large current in the overhauling and debugging process, and can prevent the production stagnation caused by the expansion of fault.
[0004] The utility model discloses a false load device of magnetic particle flaw detector main loop debugging detection, including first diode D1, second diode D2, first bulb PZ1 and second bulb PZ2, first diode D1 and second diode D2 are connected in series and are connected in parallel to the two ends of first bulb PZ1 and second bulb PZ2 after being connected in series, the connection between first diode D1 and second diode D2 is in wiring terminal L1, the connection between first bulb PZ1 and second bulb PZ2 is in one end of the input end of transformer BT, the other end of transformer BT is connected with wiring terminal L2;Wiring terminal L1 and wiring terminal L2 are connected with main loop power supply respectively.
[0005] Further, the first bulb PZ1 and the second bulb PZ2 are used when the brightness difference of the two bulbs is large, the circuit is triggered asymmetrically, the direct current component in the circuit is large, the magnetizing current forms a short-circuit current that increases sharply, and the equipment circuit breaker protection is triggered.
[0006] Further, the first bulb PZ1 or the second bulb PZ2 is used when the brightness suddenly changes, the equipment is triggered to have a loss of intersection phenomenon, and the current reaches the maximum value instantaneously.
[0007] The utility model has the advantages that:
[0008] The false load device for main circuit debugging and detection of the magnetic particle flaw detector can prevent large current from causing equipment damage during maintenance and debugging, and can prevent fault expansion and production stagnation.
[0009] In addition to the purposes, features and advantages described above, the utility model has other purposes, features and advantages. BRIEF DESCRIPTION OF DRAWINGS
[0010] The accompanying drawings, which form a part of this application, are included to provide a further understanding of the application, and are incorporated herein in their entirety.
[0011] Figure 1 is the false load device for main circuit debugging and detection of the magnetic particle flaw detector of the utility model embodiment use state schematic diagram. DETAILED DESCRIPTION
[0012] In order to make the purposes, technical schemes and advantages of the utility model more clearly, the following will be further described in detail by combining with drawings and examples. It should be understood that the specific examples described here are only used to explain the utility model, and are not used to limit the utility model.
[0013] REFERENCE Figure 1 is the false load (two-way diode series bulb reverse parallel device) wiring principle diagram of the utility model.
[0014] A false load device for main circuit debugging and detection of a magnetic particle flaw detector, comprising a first diode D1, a second diode D2, a first bulb PZ1 and a second bulb PZ2, the first diode D1 and the second diode D2 are connected in series and are connected in parallel to the two ends of the first bulb PZ1 and the second bulb PZ2 connected in series, the first diode D1 and the second diode D2 are connected to the wiring terminal L1, the first bulb PZ1 and the second bulb PZ2 are connected to one end of the input end of the transformer BT, and the other end of the transformer BT is connected to the wiring terminal L2;Wiring terminal L1 and wiring terminal L2 are connected to the main circuit power supply respectively.
[0015] The first bulb PZ1 and the second bulb PZ2 are used when the brightness difference between the two bulbs is large, the circuit is triggered asymmetrically, the direct current component in the circuit is large, the magnetizing current forms a short-circuit current that increases sharply, and the equipment circuit protection is caused.
[0016] The first bulb PZ1 or the second bulb PZ2 is used when the brightness suddenly changes, the equipment triggers the loss of intersection phenomenon, and the current reaches the maximum value instantaneously.
[0017] Adopting the dummy load (two-way diode series bulb reverse parallel device) in series in the main circuit, the circuit is debugged, the current is limited, the large current is prevented, and according to the working state of the bulb, the circuit fault state can be preliminarily judged:
[0018] (1) the double bulb brightness uniform change circuit works normally:
[0019] (2) the brightness difference of single bulb or double bulb is large, the circuit triggering is asymmetric, the direct current component in the circuit is large, the magnetizing current forms the short circuit current which is sharply increased, leading to the device circuit protection
[0020] (3) the bulb brightness suddenly changes, the device triggering is lost, the current reaches the maximum value instantaneously: leading to the device circuit protection.
[0021] (4) in the debugging process, the bulb appears the flicker phenomenon, the trigger transformer or the main transformer is short-circuited, the self-induction current is generated to affect the normal triggering of the thyristor.
[0022] (5) the bulb is bright on the device, combined with the measurement of the multimeter to judge the primary winding of the main transformer to the ground, the thyristor is broken down, and the trigger circuit is directly triggered.
[0023] Adopting the device for the current fault maintenance debugging of the magnetic particle flaw detector, the phenomenon that the device and facility are damaged due to large current in the maintenance and debugging process can be prevented, and the production stagnation caused by the fault expansion can be prevented. And the fault range can be quickly judged. The device can be popularized to the debugging and maintenance process of other thyristor variable current circuits.
[0024] The device includes two diodes and two lamps, and the transformer is a main transformer on the detected equipment, the device is connected in series with a primary winding of the main transformer BT, is related to the maximum working voltage of the primary side of the main transformer, and is not a fixed number, the device does not include the transformer BT, and the transformer BT is an object to be debugged. When the device is used, it can be connected in series in the main circuit corresponding to the magnetic particle flaw detector which needs to be detected and debugged.
[0025] The device can be popularized to the debugging and maintenance process of other thyristor variable current circuits.
[0026] The above merely describes preferred embodiments of the utility model and is not used to limit the utility model, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model should be included in the protection scope of the utility model.
Claims
1. A false load device for debugging and detecting a main circuit of a magnetic particle flaw detector, characterized in that, Including first diode D1, second diode D2, first bulb PZ1 and second bulb PZ2, the first diode D1 and second diode D2 are connected in series, and are connected in parallel to the two ends of the first bulb PZ1 and second bulb PZ2 after being connected in series, the first diode D1 and second diode D2 are connected to the terminal L1, the first bulb PZ1 and second bulb PZ2 are connected to one end of the input end of the transformer BT, the other end of the transformer BT is connected to the terminal L2; the terminal L1 and the terminal L2 are respectively connected to the main circuit power supply.
2. The false load device for magnetic particle flaw detector main circuit debugging detection according to claim 1, characterized in that, The first bulb PZ1 and the second bulb PZ2 are used when the brightness difference of the two bulbs is large, the circuit is triggered asymmetrically, the direct current component in the circuit is large, the magnetization current forms a short-circuit current which increases sharply, and the device is protected by breaking the circuit.
3. The false load device for magnetic particle flaw detector main circuit debugging detection according to claim 1, characterized in that, The first bulb PZ1 or the second bulb PZ2 is used when the brightness mutates, the device triggers the loss of intersection phenomenon, and the current reaches the maximum value instantaneously.